关键词: 轴承钢；GCr15, 电渣重熔；渣系；洁净度

Abstract: In accordance with the current in electroslag remelting(ESR)GCr15 bearing steel D inclusions exceeding the standard problem,the different slag systems are designed,and respectively with the help of Factsage software and empirical formulae to calculate the melting characteristics of the slag system,viscosity,electrical conductivity and other physical parameters,using laboratory slag metal balance experiments and field 2.5 t electroslag remelting experiments,the results show that, the optimal ESR slag system is 55CaF₂-25Al₂O₃- 15CaO-5MgO.With use of the optimal slag system the average total oxygen content in steel is 41.98% lower than that with the traditional slag system,and can reduce the change in the total oxygen content of steel in different locations of electroslag ingot; as compared to the original slag system the number of 1-5  μm inclusions  decreases by 31.25%.Through the slag system on inclusions control,it can improve class D inclusion in GCr15 bearing steel,rating level reaches 0.5,and can better“clean”electric slag ingot.

Key words: Bearing Steel, GCr15, ESR, Slag, Cleanness