Heat resistant steel production workers

Smelting refractory steel is usually melted in electric arc furnace or induction furnace. High quality requirements often use vacuum refining and furnace refining process.
Some casting of high alloy heat resistant steel castings production difficult to machining deformation than rolled castings and cost-effective, and high endurance strength. Therefore, the heat resistant steel in a large proportion of heat-resistant steel. In addition to sand casting, the casting process can also be used to obtain a smooth surface, precise size products. The method of centrifugal casting is often used in the high temperature furnace tubes for ammonia and ethylene cracking.
Heat treatment pearlite hot strong steel is usually used after normalizing or quenching and tempering; martensite heat-resistant steel is quenched and tempered to stabilize the structure and obtain good comprehensive mechanical properties and high temperature strength. Ferritic steels cannot be strengthened by heat treatment. In order to eliminate the internal stress caused by cold plastic deformation processing and welding, annealing can be carried out at 650 to 830 DEG C, and then quickly cooled after annealing, so as to pass through the brittle temperature range of 475 DEG C rapidly.
Most of the austenitic oxidation resistant steels are treated by high temperature solid solution heat treatment to obtain good cold deformation. Austenitic heat resistant steel is first treated with high temperature solid solution, and then at higher than the temperature of 60 to 100 DEG C under the conditions of aging treatment, so that the stability of the organization, while the second phase precipitation, in order to strengthen the matrix. The heat resistant cast steel is used in the casting state, and the corresponding heat treatment is adopted according to the type of the heat resistant steel.