Process method for refining austenitic manganese steel by blowing argon gas into medium frequency induction furnace

Abstract

The invention discloses a process method for refining austenitic manganese steel by blowing argon gas into a medium frequency induction furnace, comprising the following steps of: (1) designing and manufacturing a gas diffuser; (2) mounting the gas diffuser in the center of the bottom of the medium frequency induction furnace and connecting the medium frequency induction furnace with an argon gasblowing system; (3) when furnace charge is molten to form a about 1 / 3 molten pool, quickly melting at high power and starting to blow argon gas into the furnace from the gas diffuser at the bottom; (4) controlling the pressure and the flow rate for blowing the argon gas according to the capacity of molten steel so as to fully remove harmful gas and inclusion in the molten steel and homogenize thetemperature and components; (5) cutting off a power supply and cooling and continuously blowing the argon gas; and (6) measuring the temperature, tapping and casting. By blowing the argon gas to refine, gas and nonmetallic inclusion in the molten steel can be effectively removed, the desulfuration and the deoxidization can be achieved and the components and the temperature of the molten steel canbe homogenized. By using the method, the purified molten liquid can be molten, thereby improving the metallurgical quality of the molten steel.

Description

technical field [0001] The invention relates to a process for smelting wear-resistant manganese steel, in particular to a process for refining high-quality cast wear-resistant manganese steel by blowing argon in an intermediate frequency induction furnace. Background technique [0002] Wear-resistant manganese steel materials are widely used in mechanical equipment components in metallurgy, mining, building materials, cement, railways, electric power, petrochemical, military and other industries. The wear resistance and service life of wear-resistant manganese steel castings have a very important relationship with metallurgical quality. Improving the wear resistance of wear-resistant manganese steel castings and prolonging their service life are of great significance for continuous production, reducing economic losses, increasing economic benefits, creating high-quality wear-resistant castings and brands, and participating in international market competition. [0003] At pr...

AI Technical Summary

Problems solved by technology

[0005] The main disadvantages of the conventional smelting process of the intermediate frequency induction furnace are: compared with the electric arc furnace smelting, the ability of the slag to participate in the metallurgical reaction is weak, because the contact area between the molten steel and the slag is small, the molten pool is deep, the metallurgical reaction process is slow, and the gas The content is high, impurities are difficult to remove effectively, and the purity of molten steel is not high

In addition, the slag is heated by molten steel, the temperature is low, and the effect of metallurgical processes such as dephosphorization, desulfurization and diffusion deoxidation is poor.

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