Why stainless steel castings damage tools during machining

Unlike other traditional industries, precision casting of stainless steel castings is a new forging process that is still in a rapid development stage in our country. Stainless steel is famous for its strong corrosion resistance, high temperature resistance, high alkali resistance, and high oxidation resistance. It has the excellent characteristics of lost foam casting, and the dimensional accuracy is particularly high. The smoothness of the product surface and the application of stainless steel casting also reduce the processing process of mechanical equipment to a certain extent. However, for stainless steel casting, advantages and forging difficulty factors coexist, Because the shape of stainless steel greatly exceeds that of original iron, casting deformation caused by casting defects is more likely to occur.

Why do stainless steel castings damage tools during processing?

1. As far as processing is concerned, the hardening during processing is very serious. If it is hardened during the cutting process, the tendency of the cutting direction will be inaccurate. Therefore, cutting the cutting tool at the hardened position can easily reduce the service life of the tool.

2. During the casting process, the tool will be more likely to come into contact with the tool. No matter what stainless steel material is, it will have high cutting strength and high cutting temperature.

3. This material has high hardness. When cutting, its formability becomes larger, the tangential stress is larger, and the cutting force is larger. In addition, the thermal conductivity of this material is very poor, and the temperature is concentrated in the small and difficult-to-reach slender parts around the knife edge. Part. Therefore, this is also a headache for foundries.

4. Due to the stainless steel material, the processing technology of stainless steel will increase the damage of the tool. The melting point factor contained in these raw materials is very high. The cutting temperature is high and the plastic deformation is large, which will damage the tool and speed up tool replacement. The frequency of tool sharpening is high. , will also directly affect the processing efficiency and increase the application cost of the tool.

The processing difficulty coefficient of precision cast stainless steel is relatively high, but the advantages of stainless steel precision casting cannot be ignored. This advantage has greatly exceeded this processing difficulty coefficient. The more difficult we are, the less afraid of difficulties we are, and we must be brave and gradually solve forging problems and seek Solutions: Stainless steel products cast for customers also need to be continuously improved to obtain more suitable solutions and improve the product quality of stainless steel castings.