Detailed process characteristics of stainless steel precision casting
- 2019-12-09-

Stainless steelPrecision castingIn the process of use, its mechanical properties are relatively high, mainly because the melting point of its products is relatively high, the molten steel of stainless steel precision casting is easy to oxidize, and its liquidity of molten steel is poor and shrinks greatly during operation, and the body shrinkage rate is 10 ~14%.

In order to effectively prevent the cast steel from producing defects such as insufficient pouring, shrinkage cavity, shrinkage porosity, cold barrier, cracks and sand sticking, stainless steel precision casting must take more complicated process measures than cast iron during use.

The shrinkage of stainless steel precision casting greatly exceeds that of cast iron during use. In order to effectively prevent shrinkage and shrinkage defects in its castings during use, risers, cold iron and subsidy measures are mostly used in the casting process. You can achieve sequential solidification.

Due to the relatively poor fluidity of molten steel in stainless steel precision casting, in order to effectively prevent the cold barrier and insufficient pouring of the cast steel during use, the thickness of the cast steel should not be less than 8mm, and the structure of the pouring system should be simple. And the size of the cross section is larger than that of cast iron.

Stainless steel precision casting will be due to its high pouring temperature and high overheating of molten steel. It needs to be kept liquid for a long time during use. Its fluidity can be improved during use. However, if the pouring temperature is too high, it will Directly cause defects such as coarse grains and thermal cracking.

Precision casting Stainless steel precision casting is generally small, thin-walled and complex-shaped castings, and its pouring temperature is about 150 degrees, the melting temperature of steel, and the pouring temperature of large thick-walled castings is about 100 degrees higher than the melting point.