DT4C电工纯铁套筒零件矫顽力不合格工艺改进  

Process improvement for coercivity nonconformity of DT4C electrical iron sleeve parts

作　　者：赵金龙 任卫斌[1] 李剑玉 Zhao Jinlong;Ren Weibin;Li Jianyu(China Airborne Missile Academy,Luoyang Henan 471003,China)

机构地区：[1]中国空空导弹研究院,河南洛阳471003

出　　处：《金属热处理》2023年第6期277-280,共4页Heat Treatment of Metals

摘　　要：某批次DT4C电工纯铁套筒零件采用真空氢气退火炉经900℃中温退火后矫顽力不合格,对其退火工艺进行了研究。结果表明,采用1120℃×4 h+900℃×4 h两次退火后,DT4C电工纯铁试棒矫顽力及晶粒度等级较900℃×4 h退火明显降低,且1120℃→900℃过程中试棒不同冷速下的矫顽力均合格且差别不大,冷速可达到240℃/h,提高了零件的加工效率。不合格批套筒零件经两次退火后的矫顽力均达到HB/Z 5015—1994要求。Annealing process was studied in order to solve the coercivity nonconformity problem of DT4C electrical iron sleeve parts after annealing by vacuum hydrogen annealing furnace at 900℃.The results show that after 1120℃×4 h+900℃×4 h two-stage annealing,the coercivity and grain size of the tested rod are significantly reduced compared with 900℃×4 h annealing,and the coercivity at different cooling rates during the process from 1120℃to 900℃is qualified and the difference is not significant.And the cooling rate reaches 240℃/h,the processing efficiency of the parts can be improved.The coercivity of unqualified batch sleeve parts after two-stage annealing meets the requirements of HB/Z 5015—1994.

关 键 词：DT4C电工纯铁 矫顽力 晶粒度 退火 冷却速度 

分 类 号：TG156.2[金属学及工艺—热处理]