The mechanical property of stainless steel investment casting is higher than that of cast iron in the process of operation, but the performance of cast iron is worse for such materials. The melting point of stainless steel precision casting is higher than that of other materials in the process of production, and its molten steel is prone to oxidation in the process of processing. Condition.
There are many problems that need to be paid attention to in the process of stainless steel precision casting. The main reason is that the flow performance of its molten steel is relatively poor. In the process of processing products, in order to prevent the casting from insufficient pouring or cold separation, the wall thickness of the steel casting can not be less than 8mm.
The structural force of the casting system of stainless steel investment casting is very simple. The cross-section size of the equipment is larger than that of cast iron in the process of using. The hot or dry casting mould can be used in the process of processing.
The shrinkage of stainless steel investment casting is much higher than that of cast iron. In order to prevent shrinkage and porosity defects, risers and chills are mostly used in casting process, so that sequential solidification can be achieved.
Because of the poor fluidity of molten steel in stainless steel investment casting, in order to prevent its casting from producing cold isolation or inadequate pouring, the wall thickness of its steel casting can not be less than 8 mm, and the structure of the pouring system should be simple.
Stainless steel precision casting has high pouring temperature, high superheat of molten steel, can keep liquid for a long time in the process of use, and the fluidity of equipment can be improved to a certain extent. However, too high pouring temperature will cause defects such as coarse grains, hot cracking, pore and sticky sand.
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