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本文介绍了电渣重熔军甲轴承钢改善硫化物评级的途径,简述了提高军甲轴承钢非金属夹杂物合格率的基本原理与结果,不同炉渣成分会得到不同的熔池深度,电渣重熔脱硫主要是电化学反应,在渣中增加石灰不能增大脱硫能力,Fe—S平衡液固相线范围宽是硫产生偏析的内因,熔池过深是形成硫化物严重偏析的外因,选择好炉渣条件,通过控制电流来控制渣池温度与熔池深度,加速冷却结晶,使硫化物和其它非金属夹杂物去除良好并在结晶组织中细小均匀分散,改善显微偏析,以便达到降低硫化物级别之目的。
This paper introduces the ways to improve sulfide rating of ESR bearing steel, and briefly describes the basic principle and result of improving the qualified rate of non-metallic inclusions in MB steel. Different slag compositions can obtain different depths of molten pool, Residue remelting desulfurization is mainly electrochemical reaction, adding lime in the slag can not increase the desulfurization capacity, Fe-S equilibrium liquid solid line range is the internal cause of segregation of sulfur, the molten pool is too deep formation of sulfide segregation serious external , The choice of slag conditions, by controlling the current to control the temperature of the slag pool and the depth of the molten pool, accelerated cooling and crystallization, sulfide and other non-metallic inclusions to remove well and finely dispersed in the crystalline microstructure to improve the micro-segregation in order to achieve The purpose of reducing the level of sulfide.