GCr18Mo轴承钢真空碳脱氧研究  

Study on Vacuum Carbon Deoxidation of GCr18Mo Bearing Steel

作　　者：秦礼彬 郭曙强 郑红妍[1,2,3] 潘长啸 石世隆 任忠鸣 QIN Libin;GUO Shuqiang;ZHENG Hongyan;PAN Changxiao;SHI Shilong;REN Zhongming(State Key Laboratory of Advanced Special Steel,Shanghai 200444,China;Shanghai Key Laboratory of Advanced Ferrometallurgy,Shanghai 200444,China;School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]省部共建高品质特殊钢冶金与制备国家重点实验室,上海200444 [2]上海市钢铁冶金新技术开发应用重点实验室,上海200444 [3]上海大学材料科学与工程学院,上海200444

出　　处：《上海金属》2020年第1期60-67,76,共9页Shanghai Metals

基　　金：国家自然科学基金(No.U1560202)

摘　　要：研究了GCr18Mo轴承钢在不同真空度下碳脱氧的效果,建立了碳脱氧以及真空脱氮的热力学与动力学模型。结果表明:在1873 K条件下,真空度为10、50、100 Pa时,碳脱氧可将原始钢中的氧含量从100μg/g降低至12.8~25.6μg/g;随着真空处理时间从10 min延长至60 min,钢中氧含量和氮含量不断降低,夹杂物的数量明显减少、尺寸减小;与铝脱氧相比,碳脱氧的钢夹杂物数量更少、尺寸更小。最后,根据试验结果建立了CGr18Mo轴承钢在不同真空度下碳脱氧的氧含量和氮含量随真空处理时间变化的关系式。Effect of carbon deoxidation of GCr18Mo bearing steel at different vacuum levels was studied,the thermodynamic and kinetic models of carbon deoxidation and vacuum denitrification were established.The results showed that the oxygen content in the original steel could be reduced from 100μg/g to 12.8-25.6μg/g by carbon deoxidation at 1873 K and under pressures of 10 Pa,50 Pa and 100 Pa.As the vacuum treatment time prolonged from 10 min to 60 min,the oxygen and nitrogen content in the steel decreased continuously,and the amount and size of inclusions decreased significantly.Compared with aluminum deoxidation,the amount and size of inclusions in the carbon deoxidized steel were significantly reduced.Finally,based on the experimental results,the relation of oxygen and nitrogen content to vacuum treatment time for CGr18Mo bearing steel after carbon deoxidation at different vacuum levels was established.

关 键 词：GCr18Mo轴承钢 碳脱氧 脱氮 热力学 动力学 

分 类 号：TF7[冶金工程—钢铁冶金]