The production process of mold steel mainly includes the following steps: raw material selection, smelting, casting, heat treatment and processing.
Raw material selection: The main components of mold steel include carbon, silicon, manganese, phosphorus, sulfur, chromium, molybdenum, cobalt and other elements. Molds for different purposes require raw materials of different compositions. For example, molds with high hardness require more chromium and molybdenum.
Smelting: Put the selected raw materials into an arc furnace or an induction furnace and melt them into molten steel by high-temperature heating. Controlling the furnace temperature and furnace atmosphere is the key to ensuring the quality of smelting.
Casting: Pour the molten steel into the mold and solidify it into a shape. The casting temperature and cooling rate need to be strictly controlled during the casting process to ensure the quality of the casting.
Heat treatment: Heat treatment is a key step in improving the performance of mold steel, including tempering, quenching and other processes, which can improve the hardness and wear resistance of mold steel, while improving its organization and performance.
Processing: After heat treatment, mold steel needs to be finely processed, including turning, milling, grinding, drilling and other processes to achieve the size and shape required by the design.
In addition, the production process of high-carbon and high-alloy tool steel also includes some special technical innovations, such as arc continuous casting and one-fire rolling technology, which can reduce production costs, improve the yield rate and achieve efficient production.