摘要
针对RH工艺生产轴承钢,通过现场试验研究了RH真空处理时间对钢中全氧和显微夹杂物的影响.试验结果表明,延长RH真空时间可以进一步降低钢中全氧和显微夹杂物的数量,RH脱氧主要是通过显微夹杂物的去除,全氧与显微夹杂物随时间的变化关系基本一致;真空处理25min可使钢液中全氧和显微夹杂降低约60%,比14min时多降低约13%,并得出邢钢轴承钢生产条件下,RH精炼过程钢液的表观脱氧速度系数为-0.036min-1;工艺优化后147炉轴承钢产品的平均全氧为6.7×10-6.
The influence of RH vacuum processing time on the total oxygen content and micro inclusion removal of bearing steel GCr15 was discussed. The results show that total oxygen content and micro inclusion amount will be decreased further by prolonging vacuum processing time,deoxidization during the RH process is caused by micro inclusion removal,and the relationship between the total oxygen content and RH vacuum processing time is in agreement with the relationship between the micro inclusion amount and vacuum processing time. After 25 min of the RH vacuum process,total oxygen content and micro inclusion amount are decreased by about 60%,which is 13% less than those after 14 min of the RH vacuum process. It is found that the deoxygenation coefficient is -0.036 min-1 under the RH production condition of bearing steel GCr15 in Xingtai Iron & Steel Corporation. The average total oxygen content of 147 heats bearing steel is 6.7×10-6 after process optimizing.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2009年第S1期121-124,共4页
Journal of University of Science and Technology Beijing
关键词
RH
轴承钢
全氧
显微夹杂物
RH
bearing steel
total oxygen
micro inclusion
