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Foundry: How to solve defects in pump body castings?

Foundry: How to solve defects in pump body castings?

Foundry: The fundamental focus of solving shrinkage porosity defects in pump body castings is "thermal equilibrium." Solutions: 1. Tilting the mold and alloying both provide benefits. Eliminating shrinkage porosity defects in pump body castings is a complex process of understanding and implementation.

09

2021

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03

Foundry: How to inspect the quality of pump body castings?

Foundry: How to inspect the quality of pump body castings?

Foundry: The inspection of pump body castings mainly includes dimensional inspection, visual inspection of appearance and surface, chemical composition analysis, and mechanical property tests. For pump body castings that are more important or prone to problems in the casting process, non-destructive testing is also required. Non-destructive testing techniques that can be used for quality inspection of ductile iron castings include liquid penetration testing, magnetic particle testing, and eddy current testing.

22

2021

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02

Foundry: Introduction to the principles of lathe casting

Foundry: Introduction to the principles of lathe casting

Foundry Vehicle: Principles of Bed Casting Casting 1. Sand mold forging and casting should be given priority. The main reasons are that sand mold forging and casting have lower cost, simpler production technology, and shorter production cycle than other methods. When wet molding cannot meet the requirements, consider using clay sand surface dry sand molds, dry sand molds, or other sand molds.

21

2021

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02

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:

19

2021

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02

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.

17

2021

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02

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.

15

2021

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02

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