Stainless steel forging

One-Stop Solution for Steel Castings

Highlights

Welcome to NingBo Winner Tiger Machinery Co., Ltd, your trusted partner for high-quality steel castings. As a leading foundry in China, we specialize in providing customized casting solutions for various industries, including automotive, agricultural machinery, mining, and construction. With our expertise in casting, forging, and CNC machining, we offer a comprehensive range of carbon steel castings to meet your specific requirements.

Customized Steel Castings
Customized Steel Castings

Our carbon steel castings are tailored to your specific requirements. With a wide range of materials, processes, and finishing options, we can create castings that meet your exact specifications. Whether you need parts for automotive, agricultural machinery, or construction equipment, our customized steel castings deliver precise fit and exceptional performance.

Diverse Applications
Diverse Applications

Our carbon steel castings find applications across various industries. From heavy-duty equipment used in mining and construction to components for agricultural machinery, our castings provide the strength and reliability needed to withstand demanding environments. Count on us for high-quality steel castings that meet the rigorous standards of industries such as automotive, mining, and construction.

Stringent Quality Control
Stringent Quality Control

At NingBo Winner Tiger Machinery Co., Ltd, quality is our top priority. We follow ISO9001, TS16949, ISO1400, and RoHS standards to ensure that our steel castings meet the highest quality requirements. Our quality control measures include FEMA, PPAP, APQP, and comprehensive testing reports for every delivery. With our commitment to excellence, you can trust our steel castings to perform reliably in your applications.

Value-Added Services
Value-Added Services

We offer various finishing options, including plating, painting, powder coating, and polishing, to enhance the appearance and functionality of the castings.

4 Products Found.

OEM Equivalent Quality

Caterpillar
Caterpillar
KOMATSU
Komatsu
HITACHI
Hitachi
JCB
JCB

Extensive Casting and Machining Capabilities

With our state-of-the-art facilities and experienced team, we offer comprehensive casting and machining services. From turning and milling to grinding and drilling, we have the expertise to deliver precision-machined steel castings that meet your exact specifications. Our machining tolerances of +/- 0.05mm ensure the highest level of accuracy and quality.

Extensive Machining Capabilities
Versatility in Material and Process

Versatility in Material and Process

We work with a wide range of materials, including carbon steel, stainless steel, aluminum, brass, and more. Our forging processes include die forging and free forging, allowing us to produce a diverse range of castings for various applications. Additionally, our surface treatment options such as sand blasting, powder coating, painting, anodizing, and polishing enhance the appearance and durability of our castings.

Customer-Focused Approach

At NingBo Winner Tiger Machinery Co., Ltd, we prioritize customer satisfaction. Our dedicated customer support team, including key account managers and quality technicians, is committed to providing prompt and reliable assistance. We value open communication and strive to address any questions or concerns within 24 hours. Partner with us for a seamless and hassle-free experience.

Customer-Focused Approach

Models That We Can Assemble

Production System

Casting Types

Testing Equipment

FAQ

What is the Lead Time?

Casting:30-60 days.

CNC machining:15-30 days.

What is the Payment Methods?

Our payment options include T/T, L/C, or O/A.

What is the Warranty?

One year without vandalism.

What are your terms of delivery?

We provide multiple delivery terms including FOB, CNF, DDU, and CIF. You can select the most suitable option based on your requirements.

Formation of Casting Internal Stress, Deformation, and Cracks

Casting stresses are fundamentally caused by varying cooling speeds in different areas of a casting during its solidification process. This happens because solidification often results in volume shrinkage with certain exceptions, such as spheroidal graphite iron where graphite expansion also occurs.
For a singular casting, it’s rare to achieve simultaneous solidification. Hence, the initial areas to solidify generate an impediment for the areas that solidify later, while those late solidifying areas generate a squeeze on the already solidified parts. This situation breeds the internal stresses, and wherever there is stress, deformation ensues inevitably.
The magnitude of the deformation depends on the casting’s structure and strength. If the internal casting stress is sufficiently large and the casting or mold itself impedes this deformation, cracks will occur in the casting. These cracks in the early hot glowing stage of casting solidification are referred to as hot tears, where high sulfur content can escalate the propensity for hot tears. The cracks that occur later are denoted as cold tears and are more likely to form in the presence of the element phosphorus.
Recognizing and addressing these issues is crucial during the casting process. Deformed cooling or unbalanced shrinkage could result in the formation of cracks or defects.
Cracks in the castings, known as hot tears, can happen during the early stages of solidification or shortly after, when the casting is still at a low strength and plastic state. The cause lies in the obstruction of the solid-state shrinkage. This can result in uneven thickness, tortuous and irregular shapes, with an oxidized surface that lacks metallic luster.
There are a host of reasons for the development of hot tears, nonetheless, they largely boil down to the mode of casting solidification, and the thermo-stresses and shrinkage stress during the casting solidification period.
To prevent these cracks or defects, one can improve the casting structure, refining, and degassing processes, adopt the correct casting process measures and lastly conduct timely aging heat treatments.
Cold cracks transpire when the casting, post solidification, cools down to an elastic state due to the local casting stress surpassing the alloy’s ultimate strength. Thermal stress, shrinkage stress, and an uneven wall thickness of the casting are a few parameters that may increase casting stress and reduce the metal strength, thus fostering the formation of cold cracks.
Founded in 2012, NingBo Winner Tiger Machinery Co., Ltd specializes in supplying casting, forging, and CNC machining spare parts for mining, construction, and rails, mitigating these cracks and defects, thereby delivering high-quality products.
If you want to learn more about the formation of casting internal stress, deformation, and cracks, check out this article.
Feel free to contact us for any inquiries or concerns. We are always here to assist you!

The Casting Process of Abrasion-Resistant Steel in a Casting Foundry

In a casting foundry, castings like steel parts are susceptible to casting defects like cracks, it is for this reason that methods and measures are extensively gathered to prevent these defects when determining the casting process. Abrasion-resistant steel, a special type of steel consisting of multiple chemical components, holds much peculiarity in its casting. The casting process hence bears corresponding characteristics, such as the determination of molding materials, the selection of process parameters, the gating system, cold iron use, process subsidies, risers and the repair and cleaning process of the castings. We will go over these in detail.
Choice of Molding Material
Casting molds can be classified into three kinds: sand, semi-sand metal, and full metal molds. The selection of which type of mold to use is subject to comprehensive consideration of the properties of the cast steel as well as the production conditions.
Sand Mold
Commonly used for single small batches and parts with complex structures, it typically adopts silica sand or limestone sand to prepare into water glass sand or green sand for molding and casting.
Semi-sand Metal Mold
Used for repetitive production of large rotating parts with uniform wall thickness, the semi-sand metal mold molding method employs semi-sand of 10-15mm or a semi-coating of 2-3mm, whose wall thickness is 0.8-1.2 times that of the respective castings.
Metal Mold
The metal mold method is used for large batches and simple structure of small and medium castings.
The wall thickness of the working metal mold is 0.6-0.8 times that of the respective castings.
During the production of abrasion-resistant steel parts, quartz sand is widely used. Nonetheless, it is critical that the coating is prepared with alkaline or neutral refractory materials. As an example, NingBo Winner Tiger Machinery Co., Ltd, a company specializing in supplying casting, forging, and CNC machining spare parts for mining, construction, and rails, makes extensive use of quartz sand during the production of abrasion-resistant steel parts. However, we make sure that the coating is prepared with alkaline or neutral refractory materials because, after the steel of abrasion-resistant steel is made, it undergoes secondary oxidation and a lot of MnO appear on the steel surface.
If you want to learn more about abrasion-resistant steel casting process in a casting foundry, check out this article.

Casting Abrasion-Resistant Steel in a Foundry

Casting abrasion-resistant steel involves working with a high carbon content, high alloy element content, and wide range of chemical component changes and presents unique challenges compared to casting traditional steels. The process can result in a series of issues such as thermal stress, shrinkage, cold cracks, hot cracks, and porosity. Comprehensive consideration of the characteristics of abrasion-resistant steel, the casting process, as well as factors affecting the quality of casting abrasion-resistant steel is necessary to overcome these challenges, ensure casting quality and meet production requirements.
Properties of Casting Abrasion-Resistant Steel
Casting properties mainly include crystal structure, fluidity of the liquid alloy, crystallization shrinkage, and cracking. The casting properties not only affect the appearance and size of the casting, but also its intrinsic quality. Research on casting properties is essential to adopt the correct process measures and obtain sound castings.
Fluidity of Liquid Steel
The fluidity refers to the ability of liquid metal to fill the casting mold cavity. The fluidity is related to the metal’s viscosity, surface tension, oxidation degree, and the nature of the oxide. Several factors can affect the fluidity accordingly:
Influence of the viscosity of liquid metal on the fluidity of abrasion-resistant steel : The viscosity of metal is the internal friction caused by the metal liquid in the flow. It is also the manifestation of the interaction force between metal atoms. The main factors affecting the viscosity are the chemical composition of the metal, the melting point of the metal, and the overheating temperature of the metal liquid.
Flowability of liquid high manganese steel : The flowability of liquid metal refers to its ability to inflate the casting mold cavity. The flowability is correlated with the viscosity, surface tension, oxidation degree, and the nature of the oxide of the liquid metal. These factors affecting the flowability will be detailed below.
Considering the unique needs and challenges of casting abrasion-resistant steel, NingBo Winner Tiger Machinery Co., Ltd takes the utmost care in providing customized casting solutions to address the same. Whether it’s about ensuring the fluidity of the liquid alloy, minimizing crystallization shrinkage, or reducing the likelihood of cracking, comprehensive and tailored strategies are employed to address every process aspect and deliver high-quality abrasion-resistant steel components.
For more information about our casting process and products, please don’t hesitate to contact us. We’re here to help!

Casting Process Techniques of High-manganese Steel Plate in a Foundry

As the properties of manganese steel include a large solidification shrinkage and poor heat dissipation, specific measures are taken in the process design.
Shrinkage and Molding Sand
The casting shrinkage taken is 2.5%-2.7%, taking the upper limit for longer and larger castings. The collapsibility of the molding sand and the sand core must be good.
Gating System
An open gating system is employed. Multiple dispersed in-gates introduce the liquid metal from the thin-walled part of the casting, and it forms a flat and wide bell shape. The cross-sectional area close to the casting is larger than the cross-sectional area connected to the sprue, allowing the molten metal to be rapidly and steadily poured into the mold and prevent a large temperature difference within the entire mold.
Riser
The diameter of the riser should be larger than the diameter of the hot section and should be close to the hot section. The height is 2.5-3.0 times the diameter. The use of hot risers, even pour-risers-in-one, is a must. This allows the supply of ample high-temperature metal liquid to compensate for the shrinkage during the casting solidification process.
Gating Channel
Positioning the sprue and riser at a higher location (the sand box tilts 5-8 degrees) is also correct. The pouring should be as low temperature and fast as possible. As soon as solidification occurs, the sand box should be loosened promptly.
Cold Iron
Smart designers always take advantage of cold iron, including internal and external iron. It not only refines primary crystallization and eliminates shrinkage holes and looseness but also improves the yield of the process. Of course, the appropriate quantity and specifications should be considered. Internal cold iron should be clean, easily molten, and minimal. The three-dimensional size of the external cold iron relates to the three-dimensional size of the cooling object as a function of 0.6-0.7 times. A boundary that is too small does not work, and one that is too large causes the casting to crack.
Castings
The castings need to be kept warm in the mold for a long time until it is below 200°C before opening the box.
In conclusion, the key to getting flawless high-manganese steel plate castings is a thorough understanding of the metal’s unique properties and the factors influencing its casting quality.
At NingBo Winner Tiger Machinery Co., Ltd, this understanding is the core of our operating philosophy.

Wear-Resistant Plates Welding vs Casting in a Foundry

Whether to choose welding or casting when aiming for wear-resistant plates is a frequent dilemma faced by businesses. In this article, we will provide some insights towards both options that can serve as guidelines for decision-making.
Welded Wear Plates
Welded wear plates involve hardfacing a layer of wear resistance on the surface. The resultant Rockwell hardness can measure around 67, yielding satisfactory performance. One distinct advantage is that if the wear layer gets damaged during mining or industrial applications, it can be conveniently ground using a carbon arc gouge and then overlaid again with a new layer. This way, the component is as good as new and associated costs of purchasing spare parts are cut down. Given this cost-saving trait of welding, it serves as a smart solution if spare part costs are a concern. Furthermore, welding can be carried out under various mining and industrial conditions, which assures the completion of projects within the stipulated timeframe.
Casted Wear Plates
On the other hand, casting in a foundry provides an opportunity to create robust, high-quality, and durable wear-resistant plates using various alloys. The products feature improved tensile & yield strength and improved hardness which significantly reduce the wear rate. At NingBo Winner Tiger Machinery Co., Ltd, our casting foundry provides high-quality cast products that last longer and perform better, even in the most demanding conditions.
Considering both options, it is crucial to understand your specific needs, the working conditions your equipment operates in, and the extent of abrasion it is exposed to before making a decision.
Simply put, the choice between welding and casting largely depends on the specific requirements and the budget. If reusability and cost-effectiveness stand as a priority, welding might be a better pick. However, if higher durability, performance, and less frequent replacements are desirable, casting should be the route to take.
At NingBo Winner Tiger Machinery Co., Ltd, our experts are always ready to offer guidance to help you make the right decision for your specific needs. To learn more or for any inquiries, please do not hesitate to reach out to us.

The Influence of Casting Structure on Products in a Foundry

The structure of a casting has a significant impact on the quality and performance of the final product. Specifically, under the same surface volume conditions, a thick-walled casting will contain more heat than a thin-walled casting. As the solidification layer progressively moves toward the center, it will undoubtedly heat the cast model to its highest temperature. The thicker the casting, the cooler its cross-section.
Because the heat dissipation conditions for forming corners and curves are different from that for surfaces, for an equivalent surface volume, the convex surface and the outer angle of the casting correspond to a gradually expanding cast model volume.
Understanding that each structure necessitates a different set of products is crucial. The same structure cannot be applied to different products. Applying the same structure to other products can lead to quality issues, serious defects, or even a complete failure in forming the product.
So, how do we adapt various structures to different products? First, the product’s structure needs to be assessed from a broad perspective. Next, this should be compared with the structure of the casting pieces. Finally, a plan is formulated based on this comparative analysis.
At NingBo Winner Tiger Machinery Co., Ltd, our years of experience in the industry gives us the expertise to understand the relationship between casting structures and product performance. Our team is adept at evaluating product structures and devising suitable casting strategies to ensure optimal results. For more information or assistance, feel free to contact us.

Minimizing Defect Losses in Foundry Castings

During the production of foundry castings, various defects such as air holes, pinholes, slag inclusion, cracks, and pits can occur due to a variety of factors. In order to achieve usage standards and reduce wastage, these defects often need to be repaired.
Repair Equipment
Common repair equipment includes argon arc welding machines, resistance welding machines, and cold welding machines.
For castings with low-quality and appearance requirements, defects can be corrected using high-heat, fast welding machines like the argon arc welder. However, in the realm of precision casting defect repair, these tools may not be the best fit as the heat impact from argon welding can cause deformations, hardness loss, sand holes, local annealing, cracking, pinholes, abrasions, scratches, undercut, or lack of fusion and internal stress damage.
Cold Welding Machine
To overcome these problems, cold welding machines are employed. They have minimal heat-affected zones, do not require preheating of the casting, and carry out repairs at room temperature, thus preventing deformations, undercutting, and residual stress. They do not provoke local annealing and do not alter the metallographic state of the casting.
Thus, cold welders are suitable for repairing surface defects of precision castings. The range of cold welding repair is a repeated melting accumulation process of Φ1.5-Φ1.2mm welding points. During the large-scale defect repair process, efficiency is the only constraint that restricts its widespread application. For large defects, a combined application of traditional welding repair technology and casting defect repair machines is recommended.
At NingBo Winner Tiger Machinery Co., Ltd, we dedicate ourselves to ensure every casting that leaves our facility is of the highest quality. Our comprehensive approach reduces defect losses to a minimum and maintains the industry’s highest operational efficiency standards.

Designing Castings Key Requirements in a Foundry

When it comes to designing castings in a foundry, it’s crucial to ensure that specific requirements are met. Castings are accounted for by pouring liquid metal into a casting cavity that corresponds to the intended part shape, which when cooled and hardened, forms the part or the raw casting. So, what factors need to be considered when designing these pieces?
1. Strength and Stiffness
For large-scale components that are subjected to considerable stress, meeting strength requirements is paramount. For most bodies, the primary measure of performance tends to be stiffness rather than strength. The rigidity of a body can influence not just the normal functioning of its transmission parts but also affects the working precision of its components.
2. Heat Dissipation and Thermal Deformation
Friction can cause heating within the components inside a body, changing the viscosity of lubricating oil and affecting its lubrication performance. Rising temperatures can cause thermal deformation in the body, especially uneven thermal deformation and thermal stress, which significantly impact both the precision and strength of the body.
3. Rational Structure Design
Strategic arrangement of supports, the layout of the rib structure, and the design of hole positions and connecting structures need to favor improved strength and rigidity of the body.
4. Good Workability
A well-designed casting should account for various facets including raw casting manufacturing, mechanical processing and heat treatment, assembly adjustments, installation and fixing, hoisting and transportation, and maintenance and repair.
At NingBo Winner Tiger Machinery Co., Ltd, we pay stringent attention to these factors during the design process to ensure that all our castings are developed to the highest standards. By focusing on these key requirements, we can guarantee that our castings will be structurally sound, durable, and able to withstand the unique demands of their applications.

Factors to Consider While Choosing the Ideal Foundry

The widespread usage of steel structures in the construction industry has emphasized the importance of castings in building applications. Choosing a suitable foundry is thus a critical task. Here are some factors to consider when deciding on a foundry:
1. Strong Capabilities of Big Brands
It is crucial to opt for a foundry with a reliable reputation and proven quality. Choosing a large-scale foundry not only guarantees excellent quality products that meet standards but also makes the foundry stand out among its competitors, acquiring a considerable market advantage.
2. Product Quality Reflects the Brand
Drawing on years of accumulated casting experience, the company has mastered a complete, mature, and unique “node” casting process technology, providing numerous high-quality casting “nodes” for large-scale domestic steel structure engineering projects. As a high-ranking casting specialist, the foundry consistently breaks new ground and innovates product quality, closely follows domestic and international development trends in the casting industry, introduces advanced casting technology, continually perfects products, and produces casting products that can withstand the severe market test.
3. Comprehensive Service Quality
The sales services offered by the foundry must cover pre-sale consultation, respecting and understanding the customer’s needs, ensuring continuous improvement, and maximizing the value to the customer. Also, the company should respect the customer’s opinions, provide timely feedback on the progress in the execution of contracts, and deliver products both on time and with guaranteed quality. After-sale services should also be effective and continue even after the sales have been completed, aiming to address any concerns the customer may have after the purchase.
At NingBo Winner Tiger Machinery Co., Ltd., we are dedicated to providing our clients with the best products and services possible, ensuring their investment yields rich returns. Please feel free to contact us for more information.

Improving Casting Quality in Large-Scale Foundries

Cast steel parts produced by large-scale foundry manufacturers are commonplace in various sectors, such as the mechanical equipment accessories used in construction projects like the vertical grinding mill rocker arm, large gears of the rotary kiln, or in precision casting steel parts used in cars or everyday tools. The quality requirements of these products are often quite high.
Basic Technique Control
Large foundries ensure the quality of these products by managing the most basic of techniques. When processing product castings, they select appropriate casting equipment to manufacture based on the drawings provided by the client. This helps ensure the quality of the cast steel parts from the ground up. If problems are encountered during the process, timely solutions are enacted to prevent further loss.
Defect Repair
While producing cast steel parts, if staff find defects in the product, the first step would be surface repair. If repair proves unsuccessful, other methods could be employed. The surface of the cast steel part is repaired until it’s smooth, after which other procedures can be performed. This method helps minimize loss during the process.
Strict Quality Control
In addition to the above precautions, if large-scale foundries want to improve the quality of cast steel parts, strict control over the quality of production should be enforced. This strategy effectively assures the customer’s experience.
At NingBo Winner Tiger Machinery Co., Ltd, we adhere to these practices precisely to guarantee exceptional casting quality. A blend of meticulous planning, expert technique, and a keen eye for quality have allowed us to deliver excellence to our clients consistently. To know more about our process, get in touch with us.

Typical Casting Processing Techniques for Large Cast Steel Parts

Large cast steel parts are common steel products found in today’s market. They are highlighted products that are widely observed by all segments of society. Let’s learn about the basic processing techniques of cast steel parts.
Positioning of Casting Components
When processing large cast steel parts, the appropriate technological methods need to be adopted according to the processing requirements of the product. For instance, before processing, the more significant areas should be placed downwards, and then other technological operations can proceed. This method ensures the processing effect of the material. For materials that have one side significantly thinner than the other, workers need to ensure the thinner side is facing downward and the other side upward. This precaution avoids wear and tear on the material.
Moulding Considerations
When moulding large cast steel parts, the outline of the mould chosen must conform to regulations. Moreover, the appearance of the mould must not contain any damage, as such can easily affect the processing effect of the material. Many processing units tend to overlook this issue during production, which impacts the material’s fabrication effect.
At NingBo Winner Tiger Machinery Co., Ltd., we thoroughly adhere to these processing techniques to ensure that the finest quality of large cast steel parts is delivered. Understanding these details allows us to effectively enhance the production and performance of our casting products. Feel free to contact us for more information!

5 Inspirations from Foundries to Improve Casting Quality

The evolution of various casting alloys depends on developing their advantages while suppressing their weaknesses. Compared to cast iron, cast steel, and non-ferrous alloys, cast iron has better casting properties, hence, it’s the better choice due to its high utilization rate and vast applicability. To stay competitive in the material domain, improving the strength and toughness of cast iron, eliminating internal flaws, reducing the weight of castings, extending service life, and saving materials are vital. Guaranteeing the reliability and stability of cast iron’s properties requires first and foremost good molten iron quality. Therefore, pre-furnace treatment is a must in foundries!
1. Desulfurization
Desulfurizing molten iron can reduce the quantity of sulfide slag in castings and the amount of spheroidizing agents needed. Development-focused countries have almost wholly adopted this desulfurization process, requiring sulfur post-desulfurization to be ≤0.01%. For China, the target is set for sulfur to be ≤0.02%, with certain enterprises managing to get to ≤0.015%.
While convenient, the Na2CO3 under-pot injection method for treatment has a low desulfurization rate and unstable effects. Advanced desulfurization, such as the suction method, should be used for large-scale production, rendering a more stable and efficient effect with less pollution.
2. Slag Removal
The slag removal process can be conducted in a ladle or an induction furnace. The slag-removal agent, also known as the slag coagulant, forms a molten layer upon contact with the liquid surface, providing cover and slag collecting functions. The agent expands when heated, creating numerous small holes in the molten slag-bubble layer and having good thermal insulation.
3. Spheroidization
The spheroidization treatment is primarily conducted through package-injection. The choice of spheroidizing agents depends on the type of furnace, iron temperature, whether desulfurization has been carried out, and the type of ductile iron. Vendor-specific stipulations and spheroidization methodologies may vary but result in consistent high-quality ductile cast iron.
4. Nurturing
Nurturing is crucial in elevating the quality of cast iron. Different forms, such as post-nurture, are pursued parallel to slag removal and spheroidization, with variations in nurturing agent granularity and uniformity having decisive effects.
5. Alloying
Several alloying elements, like Si, Mn, Cu, Cr, Mo, Ni, Sn, Sb

Secrets to Improving Electric Furnace Casting Iron Quality

With stricter requirements for environmental protection in recent years, most small cupola furnaces have been replaced by small medium-frequency induction electric furnaces. Cupola furnaces, which use coke and other fuels, engage in metallurgical reactions during the melting process. In contrast, electric furnace melting primarily involves alloy remelting, with fewer significant metallurgical reactions.
Considering the characteristics of electric furnace cast iron melting, it’s necessary for casting workers to renew their understanding of many aspects such as component selection, furnace charge ratio, scrap steel usage, incubation technology, carbon increase and carbon removal, sulfur increase and sulfur removal, solidification process, crawler process, temperature control, and casting process. All these steps are integral in ensuring and improving product quality.
1. Electric Furnace Casting Iron Charge Ratios and Synthetic Cast Iron
Casting workers know that the composition of casting materials determines their structure and properties. Several factors come into play in the production process. For example, the furnace charge ratio (amount of pig iron, scrap steel, return material, alloy addition), melting and temperature out of the furnace, and incubation technology all matter.
Synthetic cast iron refers to casting iron made using more than 50% scrap steel through a carbon increase synthesis method. It needs a relatively high melting temperature and is suitable for melting in an electric furnace.
However, there are certain don’ts for furnace charge formulas. These include: high proportion scrap steel (especially ship plate) paired with a high proportion of return material; high proportion scrap steel (especially ship plate) with high sulfur and phosphorus pig iron; return material exceeding 40%.
2. About Increase of Sulfur in Electric Furnace Cast Iron
Medium-frequency induction electric furnace melting for cast iron has a few disadvantages when compared to cupola furnace melting. These disadvantages include the iron water’s large tendency to supercool, leading to the formation of D and E type graphite which affects the mechanical properties of the material. Solutions include increasing a high temperature hold time and boosting the external heterogeneous nucleation amount.
In practice, different countermeasures apply for different product structures, allowing the refining of the casting process and improving the overall quality. This highlights the importance of experience and the adaptability of casting workers.
NingBo Winner Tiger Machinery Co., Ltd are experts in these techniques, ensuring we consistently provide high-quality products. We encourage you to reach out with any questions or needs you may have.

Common Casting Equipment A Comprehensive Guide

Casting forms a large part of industrial manufacturing. This process involves melting materials and filling the liquid into a mold to solidify, achieving desired shapes. Various machines and tools are used during the casting process, let’s look into some of them.
1. Casting Equipment
Sand Mixer: Utilized in the preparation of molding sand or core sand, a sand mixer uniformly blends old sand, new sand, binders, and additional material.
Shakeout Machine: This machine utilizes vibration and impact to separate castings and mold sand in the casting process. Shakeout machines can be mechanical, electromagnetic, or pneumatic.
Shot Blasting Machine: A machine that uses a high-speed and intensive shot stream to clean or strengthen the casting’s surface. It can also deal with sand removal, decoring, and casting cleaning simultaneously.
Core Making Machine: Used to manufacture molding cores. Depending on how the cores are made, there would be different types of core making machines, like shock machines, extrusion machines, or shooting machines, among others.
Molding Machine: Used during the manufacturing of sand molds. Their main function is sand filling and pack molding sand tightly into the sand box.
Casting Machine: Forms a channel in the mold to guide the liquified metal to fill the mold and replicate its shape. Consist of sprue cup, direct sprue, cross sprue, and internal sprue.
2. Casting Materials
Molding Sand Binder: Binds loose casting sand together, transforming it into mold sand or core sand.
Regenerated Sand: Old sand that has retained its usability through treatment and can be reused in the casting production.
Casting Sand: Major material used to prepare molding sand or core sand in casting production.
Core Sand: Material utilized for core manufacturing, generally composed of casting sand, binders, and additives mixed in a certain proportion.
Molding Sand: Material used to create molds in sand casting methods. It is often a mix of casting sand, binders, and additives.
3. Post-treatment of Casting
Post-casting Treatment: Involves heat treatment, shaping, rust prevention, and rough finishing once the casting has been cleaned.
Casting Cleaning: This includes removing castings from molds, eliminating excess parts from the castings, and polishing both internal and external surfaces of the castings.
Casting Non-ferrous Alloy: Utilized in casting the workpiece, it’s one of the casting

Must-Have Materials and Tools for Your Casting Foundry

In the casting process, apart from the required casting techniques, the preparation of casting materials and tools is incredibly important. These elements significantly influence the final quality of the castings and shouldn’t be neglected. This article will specifically focus on the materials and tools required in a casting process and highlight some items that are essential in your casting foundry.
1. Casting Materials
In addition to various metal materials, casting also frequently involves other substances like coke, wood, gas, and liquid fuels. High-quality materials not only extend the lifespan of castings but also increase casting efficiency. Moreover, many of these materials aren’t used directly. To achieve maximum effect, they must undergo specific processing treatments to maintain optimal conditions.
2. Casting Equipment
Regarding casting equipment, various furnaces used for smelting metals are undoubtedly vital. In addition, every casting foundry should be outfitted with different models of sand mixers for sand mixing, various molding machines for molding, multiple core making machines for core creation, and shakeout machines for cleaning. All these pieces of equipment cater to different casting needs.
Along with these machines, your foundry should also have transportation and materials handling equipment for the efficient casting of workpieces.
Casting is a rich and intricate process, with each step playing a critical role in defining the final product’s quality. Ensuring a well-equipped foundry with appropriate materials and tools is a must for every foundry owner who is committed to delivering high-quality castings.
Among foundries, NingBo Winner Tiger Machinery Co., Ltd has established a strong reputation by consistently providing high-quality casting products using an array of reliable materials and advanced equipment. We encourage you to contact us with any related requirements or inquiries you may have.

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