Refining agent for stainless steel

Abstract

A refining agent for stainless steel contains rear-earth (10-35 wt%), Ba (10-30), Mg (0.4-6), Si (10-30), V (5-24), Mn (4-16), Ti (4-20) and Fe (rest). Said granular refining agent can fine crystal grains, stabilize austenite, decrease or eliminate free nitrides, and remove oxygen, gas and impurities, resulting in high anticorrosion and mechanical performance and low cost.

Description

technical field [0001] The invention belongs to stainless steel smelting technology, in particular it relates to a stainless steel refining agent. Background technique [0002] As an important steel material, stainless steel is increasingly widely used in the national economy. How to further improve the product quality and production efficiency of stainless steel has become a concern of the steel industry. [0003] Adding refining agent in the smelting process of stainless steel can simplify the production process and greatly reduce the production cost. Chinese invention patent application 99120040 discloses a "stainless steel refining agent and its method for smelting stainless steel" (public date on November 10, 1999). Among them, the stainless steel refining agent, its composition by weight percentage is Re 2.0-20.0%, Ca 2.0-16.0%, Al0.5-6.0%, Ba 3.0-18.0%, Mg 0.5-9.5%, V 3.0-30.0%, and the rest is Si. When it is used to smelt stainless steel, the steps are smelting-r...

AI Technical Summary

Problems solved by technology

However, the existing stainless steel refining agent is used to smelt stainless steel, which is easy to close or reduce the austenite zone and increase the ferrite content, so that the stainless steel produces magnetism or increases the magnetism.

The existing refining agent components contain aluminum, although aluminum has deoxidation effect, but the formed Al 2 o 3 It is difficult to completely remove the small inclusions in molten steel, which affects the quality of molten steel