Production Process of Heat Resistant Steel
Heat-resistant steel, which is also known as heat-resistant steel, is a type of alloy steel used in the application of high temperature and corrosive environment. It has both high strength and good high temperature oxidation resistance. In addition to its excellent mechanical properties, heat-resistant steel also has cellulose and inorganic composition and structure, so it has very good thermal shock and fatigue resistance performance.
Heat resistant steel production process can be divided into three major categories: metallurgical process, surface processing and heat treatment process.
Metallurgical process usually includes raw material making smelting, roller surface processing and refining process. Firstly, the steelmaking furnace is used to heat and melt the mineral materials and scrap iron. Then oxygen blowing and ladle refining are used to adjust and refine the steel. Finally, continuous casting is used to form the heat-resistant steel into billets.
Surface processing is an indispensable part of the production of heat-resistant steel. It includes wire drawing, blanking, punching, quenching and tempering, annealing, pickling, and grinding. Firstly, drawing is used to process the steel strips into different cross-sectional shapes and sizes. Then blanking is used to cut out the blanks with the required size. Punching is used to produce products with complex shapes. After that, quenching and tempering are used to improve the mechanical properties of the parts. Meanwhile, annealing is done to improving the characteristics of the heat-resistant steel. After that, pickling is used to remove the oxide layer on the surface of the parts. Lastly, grinding is used to remove burrs and deburr the heat-resistant steel.
Heat treatment is an important processing technology for the manufacture of heat-resistant steel. It includes annealing, normalizing, forging, quenching, tempering, solution treatment and aging. Annealing is used to make the steel molecules evenly distributed and eliminate stress. Normalizing is used to eliminate residual austenite and refine the grains. Forging is used to improve mechanical properties, quenching is used to increase the hardness of the steel, and tempering is used to improve toughness. And solution treatment and aging are used to improve the strength of the steel.
The above is the main introduction of heat-resistant steel manufacturing process. Through the above introduction, we can see that the production of heat-resistant steel is a complex process and requires precise operation, which is more demanding than ordinary steel production. Finally, it should be noted that the post-processing, such as surface treatment, should be carried out correctly in order to ensure the quality and performance of the product.
