Casting methods and heat treatment processes of precision casting

The forging method of precision castings is one of them. In addition, from a professional perspective, this is a forging method that contrasts with traditional forging processes. Its key advantages are the ability to obtain more precise shapes and good forging properties. Therefore, we can flexibly use these two aspects and use them effectively to obtain high-quality castings.

Precision casting is a type of casting. Its casing is heated at high temperature. If the forging speed is slow, thick-walled castings can be obtained. Therefore, the answer to this question is undoubtedly, if it is not light metal, it can also be aluminum die casting.

Can water-soluble cores be used for precision castings?

In precision castings, water-soluble cores can be used for cores. Generally speaking, if the casting structure is not conducive to the mold ejection work, a water-soluble core can be used on the core to achieve a good mold ejection effect.

Is pickling and passivation necessary during the manufacturing process of precision castings?

In this case, from a professional perspective, it depends on the specific situation. If there are stains or oxide scale on the surface of the casting, it must be pickled and passivated to remove these and facilitate operations such as passivation treatment. If not, there is no need to implement it. Therefore, this question is not easy to answer, because it depends on the specific situation before making a decision.

Heat treatment process of precision castings

Because the goals of precision castings are different, there are many heat treatment processes, most of which can be divided into two major categories. First of all, the organizational structure will not change due to the heat treatment process, or should not change. Second, basically the organizational structure has shifted. The heat treatment process is mainly used to remove internal structural stress mechanisms caused by differences in cooling conditions and conditions during the stainless steel casting process. Strength and other physical properties will not change significantly due to the heat treatment process.

Focusing on the second type of heat treatment process, Al Qaeda has undergone significant changes and can be roughly divided into five categories:

1. Softening and quenching: The main goal is to dissolve cementite, reduce its strength, and improve production and processing characteristics. For ductile iron, the goal is to obtain more and more metallographic structures.

2. Normalizing treatment: The key goal is to obtain ferrite and sorbite structures and improve the physical properties of stainless steel plate casting.

3. Heat treatment: mainly to obtain higher strength or damage strength, and at the same time have higher surface wear resistance.

4. Surface hardness solution: mainly to obtain a surface solidified layer and at the same time obtain higher surface wear resistance.

5. Deposition hardening treatment: mainly to obtain high toughness, so that the elongation will not change drastically.