300kg真空感应炉熔炼08Cr9CoMo钢的氧含量研究  

Research on Oxygen Content in 08Cr9CoMo Steel Melting by 300kg Vacuum Induction Furnace

作　　者：金一标 姚钰明 李亚军 彭祺珉 Jin Yibiao;Yao Yuming;Li Yajun;Peng Qimin(Sichuan Atlantic China Welding Consumables,INC.,Zigong 643000;Sichuan Atlantic ShenYuan Special Material Technology Co Ltd,Zigong 643000;CNPC Jichai Power Company Limited Chengdu Compressor Branch,Chengdu 610100)

机构地区：[1]四川大西洋焊接材料股份有限公司,自贡643000 [2]四川大西洋申源特种材料科技有限责任公司,自贡643000 [3]中国石油集团济柴动力有限公司成都压缩机分公司,成都610100

出　　处：《特殊钢》2021年第6期19-24,共6页Special Steel

摘　　要：采用MgO坩埚真空感应熔炼08Cr9CoMo钢,纯铁经除锈与其他合金烘烤后按照0.06%C、1.3%Co、9.0%Cr、1.5%Mo、0.02%La-Ce,余量为铁配料,真空度≤10 Pa通电,熔化期控制真空度25~30 Pa,精炼期控制温度1600℃和真空度10 Pa,精炼20 min,出钢前添加0.02%稀土,最终分析结果为0.022%C,0.0028%O。通过热力学计算了真空下碳脱氧能力,随着真空度的降低碳脱氧能力显著增强,热力学计算分析了MgO坩埚供氧与真空度的关系,真空度低于25 Pa后坩埚分解供氧更显著,当MgO坩埚分解供氧速率等于碳脱氧速率时钢液达到最低氧含量。By vacuum induction melting 08Cr9CoMo steel using MgO crucible,the pure iron is derusted and baked with other alloys,the charging ingredients are 0.06%C,1.3%Co,9.0%Cr,1.5%Mo,0.02%La-Ce,the balance is iron,turn on the power with vacuum≤10 Pa,controlling the vacuum 25~30 Pa during the melting period,controlling the liquid temperature 1600℃and the vacuum 10 Pa during the refining period,and refining for 20 min,adding 0.02%La-Ce before casting,the final analysis result is 0.022%C and 0.0028%O.The carbon deoxidation capacity under vacuum is calculated by thermodynamics,and it is significantly enhanced as vacuum reduces,the relationship between oxygen supply of the MgO crucible and vacuum is analyzed by thermodynamic calculation,when the vacuum is lower than 25 Pa,the crucible decomposes and supplies oxygen more significantly,when the decomposition rate of the MgO crucible is equal to the carbon deoxidation rate,the molten steel reaches the minimum oxygen content.

关 键 词：08Cr9CoMo钢 真空感应熔炼 碳脱氧 坩埚分解 

分 类 号：TF703[冶金工程—钢铁冶金]