Billet casting is the process of casting molten steel into billets luoyang hongteng electrical equipment co. ltd.
Strand Cast Steel Continuous Withdrawal
The first step is to prepare molten steel, and obtain molten steel of suitable composition and temperature by melting scrap steel, pig iron and other raw materials mini rolling mill.
induction furnace cooling system The next step is pouring. The molten steel is poured into a specific billet mold. The shape and size of the mold determine the shape of the billet. During the pouring process, the pouring speed and temperature should be controlled to avoid defects such as insufficient pouring and cold shut. For example, a slow pouring speed may cause the molten steel to solidify before it is fully filled in the mold, affecting the integrity of the billet.
The last step is cooling and demolding. The molten steel gradually cools and solidifies in the mold, and when it is completely solidified, it is removed from the mold to obtain a billet. Some billets may also require subsequent cleaning, finishing and other processes, such as removing burrs and oxide scales on the surface, to improve the quality of the billet.
- Billet Casting Process
Billet casting mainly includes the following process steps:
- Batching
According to the performance requirements of the required billet, various raw materials are calculated and prepared. Such as scrap steel, pig iron, alloy elements (chromium, nickel, etc.), accurate ingredients are the basis for ensuring the quality of steel billets stainless steel furnace.
- Melting
Generally, it is carried out in furnaces such as electric arc furnaces and converters. Add the prepared raw materials to the furnace and use the high temperature generated by electrical energy or chemical energy to melt the raw materials. This process requires strict control of parameters such as temperature and furnace atmosphere. For example, when smelting alloy steel, it is necessary to prevent excessive oxidation of alloy elements.
- Refining
The molten steel after smelting may contain impurities, gases, etc. The refining process can remove these harmful components and improve the purity of the molten steel. For example, vacuum treatment can effectively reduce the content of gases such as hydrogen and oxygen in the molten steel.
- Pouring
After the refined molten steel reaches the appropriate temperature and composition, it is poured into the billet mold. Continuous pouring or die casting can be used. Continuous pouring is efficient and suitable for large-scale production; die casting is more flexible and is used for some special specifications of billets. When pouring, the pouring speed and molten steel temperature should be controlled to avoid defects.
- Cooling and solidification
The molten steel is cooled in the mold to form a solid billet. The cooling rate affects the microstructure and performance of the billet. For example, rapid cooling may make the billet more dense and stronger.
- Demolding and cleaning
After the billet is completely solidified, it is removed from the mold. Then the surface of the billet is cleaned to remove burrs, oxide scale, etc., so that the billet has a more regular appearance and better quality.