Alloy steel castings is mostly used as a rough dressing for machine parts or as a precision casting for key parts of machines, etc. However, no matter which aspect it is used for, its quality must be strictly controlled, otherwise castings with quality problems will affect the use effect of machinery and equipment.

Therefore, speaking today, what factors will affect the quality of castings, so as to avoid the influence of these factors in production and manufacture, and produce high-quality castings.

1. Design manufacturability of castings:

During the design, besides determining the geometric shape and size of the casting according to the working conditions and the properties of the metal materials, the rationality of the design should be considered from the perspective of casting alloy and casting process characteristics, i.e. obvious size effect, solidification, shrinkage, stress and other problems, so as to avoid or reduce the occurrence of defects such as composition segregation, deformation, cracking and the like of the casting.

2. Reasonable casting process:

That is to say, according to the structure, weight and size of alloy steel castings, casting alloy characteristics and production conditions, appropriate parting surface, modeling and core-making methods are selected, and casting ribs, cold iron, riser and gating system are reasonably set to ensure excellent castings.

3. Quality of casting raw materials:

The substandard quality of metal burden, refractory, fuel, flux, modifier, casting sand, sand binder, coating and other materials will cause defects such as porosity, pinhole, slag inclusion and sand sticking in alloy steel castings, which will affect the appearance quality and internal quality of the castings, and in serious cases, the castings will be scrapped.

4. Process operation:

To formulate reasonable process operation procedures, improve the technical level of workers, so that the process procedures can be correctly implemented. During the manufacturing process, the casting quality should be controlled and inspected. First of all, it is necessary to formulate the technical rules and conditions for the control and inspection of raw materials and auxiliary materials to each specific product. Each process is strictly controlled and inspected according to the process code and technical conditions. Finally, the quality of the finished castings is inspected.

Therefore, in general, in order to ensure the quality of alloy steel castings, it is necessary to start from the two aspects of raw materials and production technology to ensure that there is no problem in the material quality of the production materials, and then to strictly produce with the correct production method, which can not only greatly improve the quality of the castings, but also reduce the probability of producing inferior products and reduce the production cost.

Shenyang Gongda has an enterprise resource planning management system and has passed ISO 9001 certification. Standardized operating procedures ensure reliable products and services.

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