粉末冶金高速钢的热处理与热磁分析  

Heat treatment and thermo-magnetic analysis of powder metallurgy high speed steel

作　　者：孙世清[1] 

机构地区：[1]河北科技大学材料科学与工程学院,石家庄050018

出　　处：《粉末冶金材料科学与工程》2013年第2期250-253,共4页Materials Science and Engineering of Powder Metallurgy

基　　金：教育部科学技术研究重点项目(205015)

摘　　要：采用综合物理测试系统的振动样品磁强计选件(PPMS-VSM),对回火处理时的粉末冶金高速钢进行热磁分析测量。退火态粉末冶金高速钢中的铁素体含量约为70.5%(体积分数)。淬火态粉末冶金高速钢在回火处理的升温阶段,有碳化物从马氏体中析出。在回火处理的保温和降温阶段,残余奥氏体向马氏体转变。淬火态钢中的马氏体含量约为44.6%,在第1次、第2次、第3次回火后,钢中马氏体含量分别约为67.5%、70.0%和70.3%。Thermo-magnetization measuring and analysis of powder metallurgical high speed steel （PM HSS） was carried out by vibration sample magnetometer in physics property measurement system （PPMS-VSM）. The result shows that the Ferrite phase content in annealed PM HSS is 70.5% （volume fraction）. The carbides precipitate from martensite in the heating stage during the temper process, but in the thermal holding and decreasing stages, residual austenite transforms into martensite. The martensitic volume fraction in quenched steel is approximately 44.6% and in the first, second, third time tempered steel are approximately 67.5%, 70.0% and 70.3%, respectively.

关 键 词：粉末冶金高速钢 回火 磁性 马氏体 铁素体 

分 类 号：TF125[冶金工程—粉末冶金]