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| Is there a material difference in the precision casting gate valve? |
| 发布日期：2019-09-05 14:37:00 点击数：445 次 |
| The precision casting gate valve must have a material difference. The material without the material is an in-line language. The indicators without the material do not necessarily meet the standard requirements. The steel used for smelting is basically recycled waste. There are many impurities inside, the product quality is relatively poor, and the material is the chemical composition and mechanical properties of the material in line with the relevant standards. Precision casting is a casting method compared to conventional casting processes. It achieves relatively accurate shape and high casting accuracy. The more common practice is to first design and manufacture the mold according to the product requirements (there may be a small amount of residual or no residual amount), and cast the wax by the casting method to obtain the original wax mold; Repeating the coating and sanding process on the wax mold, hardening the shell and drying; then melting the inner wax mold to remove the wax to obtain a cavity; and roasting the shell to obtain sufficient strength; The metal material required for casting; sanding after shelling to obtain a high-precision finished product. Heat treatment and cold working according to product requirements. Casting is just a craft, of course there are material differences |
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