Control of silicon element in bearing steel during electroslag remelting
SUN Chang- liang1，ZHOU Wei- ji1,2，LI Tao1，ZHANG Xiao- lei1，HOU Dong3
（1. Technical Division of Fushun Special Steel Group Co., Ltd., Fushun 113001, Liaoning, China 2. Technical Division of Dalian High Alloy Bar and Wire Rod Co., Ltd., Dalian 116105, Liaoning, China 3. School of Materials and Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China）
Abstract：Taking G20Cr2Ni4A bearing steel as the research object, based on the production data of different wSiO2, some data from the burning of Si in three situations were gathered, including different electrode under the oxygen content of Si burning, the Si loss under different wSiO2 in slag, and Si loss under different Ar gas flow rate. According to the statistical analysis, the electroslag remelting under different protective atmosphere and under different process of electroslag ingot the effects of ωSi content were studied. The results show that the electroslag ingot Si damage under the production of the protective atmosphere electroslag furnace was small and well- distributed. When O content was under 0.001%, Si was not easy to be damaged; When using a non protective atmosphere electroslag furnace to smelt the G20Cr2Ni4A steel, wSiO2 at the rate of 2% in the slag could ensure that the Si fluctuation was relatively small; When adopting protective atmosphere electroslag furnace to smelting,ωSiO2 content at the rate of 1% in the slag had good control effect; When using a non protective atmosphere electroslag furnace, due to the slag gas interface oxygen- transfer and changing electrode oxidation weight, the loss of Si also showed a trend of increase. For 30 t protective atmosphere electroslag furnace in the factory, the argon gas flow increased to 50 L/min, the production of the electroslag ingot composition was uniform with good economical efficiency.
孙常亮，周伟基，李涛，张晓磊，侯栋. 电渣重熔轴承钢中的硅元素烧损的控制[J]. 中国冶金, 2015, 25(06): 28-31.
SUN Chang- liang，ZHOU Wei- ji，LI Tao，ZHANG Xiao- lei，HOU Dong. Control of silicon element in bearing steel during electroslag remelting. China Metallurgy, 2015, 25(06): 28-31.
2015, Vol. 25 
