First, the chemical composition of the alloy should be determined according to the alloy grade specified in the technical requirements of the Stainless Steel Casting Valve Body, and the chemical composition should be selected from it. Then according to the burning rate and composition requirements of the elements, the batching calculation is carried out, and the amount of various charging materials is added and the charging material is selected. If the charging material receives pollution, it needs to be treated to ensure that all the charging materials are clean, rust-free, and in the feeding. Preheat before. Pay attention to inspect and prepare utensils, paint and preheat to prevent contamination of gases, inclusions and harmful elements. In the case of feeding, the general order is the returning charge, the intermediate alloy and the metal material, and the low melting point oxidizable metal material. In order to reduce the suction and oxidation pollution of the alloy liquid, it should be melted as soon as possible to prevent overheating, and the alloy liquid should be protected by a covering agent as needed.
After the Casting Valve Body is melted, refining treatment is also carried out to purify the alloy night, and the refining effect is checked. According to the need, the metamorphism treatment and the subdivision tissue treatment are performed to improve the performance, and the treatment effect is checked, and finally the temperature is adjusted and poured.
