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Foundry: An introduction to foundry production

Foundry: An introduction to foundry production

Foundry: The casting production process is a complex combination of comprehensive processes, including many production processes and links, from the preparation of metallic and non-metallic materials to alloy smelting, molding, core making, mold assembly pouring, cleaning, casting defect elimination heat treatment to obtain qualified castings. The casting production process includes the following main processes:

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2021

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Foundry: What are the reasons for the excessive carbon content of castings? (Part 2)

Foundry: What are the reasons for the excessive carbon content of castings? (Part 2)

Foundry: Reasons for exceeding the carbon content standard of castings 7. The gating system of steel castings is not set reasonably. In particular, the configuration of the vacuuming system and the casting sand box or casting process modeling is unreasonable, which causes the vacuum degree in the casting sand box to be unequal and the deviation is too large, or the actual vacuum degree is insufficient during the casting process, and the vacuum pressure gauge shows that it is in line with the technical parameters. The error value makes it impossible for the thermal decomposition products of the pattern to be quickly discharged from the casting cavity, resulting in carbonization or carbon deposition of the casting.

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2021

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Foundry: What are the reasons for the excessive carbon content in castings? (Part 1)

Foundry: What are the reasons for the excessive carbon content in castings? (Part 1)

Foundry: The following are the reasons for the carbon content of castings exceeding the standard: 1. The selection of pattern materials for castings is unreasonable. In the selection of white pattern materials for castings, one is the high carbon content; the other is the high density of the white pattern. This results in a high carbon content during the thermal decomposition of the casting pattern during the pouring process, which increases the liquid phase and mist-like free carbon content during the pouring and filling process of the casting, increasing the carburization probability of the cast steel parts.

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2021

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Foundry: How to reduce losses if defects occur in castings?

Foundry: How to reduce losses if defects occur in castings?

Foundry: Methods to reduce losses due to defects in castings. During the casting process, defects such as porosity, pinholes, slag inclusions, cracks, and pits often occur due to various factors.

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2021

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Foundry: Introduction to Raw Materials and Functions of Ductile Iron

Foundry: Introduction to Raw Materials and Functions of Ductile Iron

Foundry: Cast iron is an iron-carbon alloy with a carbon content greater than 2.11%. It is obtained by high-temperature melting and casting of industrial pig iron, scrap steel, and other steel and alloy materials. In addition to Fe, it also contains other elements. The carbon in cast iron precipitates in the form of graphite. Cast iron in which the precipitated graphite is in the form of flakes is called gray cast iron, cast iron in which the graphite is in the form of vermicular is called vermicular cast iron, cast iron in which the graphite is in the form of flocculent is called malleable cast iron, and cast iron in which the graphite is in the form of spheres is called ductile cast iron.

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2021

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Foundry: What problems usually occur with ductile iron?

Foundry: What problems usually occur with ductile iron?

Foundry: Ductile iron is a high-strength cast iron material developed in the 1950s, with comprehensive properties close to those of steel. Based on its excellent performance, it has been successfully used to cast some parts with complex stress and high requirements for strength, toughness, and wear resistance. It has rapidly developed into a widely used cast iron material, second only to gray cast iron. The so-called 'iron replacing steel' mainly refers to ductile iron.

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2021

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