锻后退火工艺对挤压轮用H13钢组织性能的影响  

Effect of Annealing Process on Microstructure and Properties of Forged H13 Steel

作　　者：毕玲敏 王延辉[1] 

机构地区：[1]大连交通大学连续挤压教育部工程研究中心,辽宁大连116028

出　　处：《大连交通大学学报》2015年第5期84-87,共4页Journal of Dalian Jiaotong University

摘　　要：采用金相分析、冲击韧性试验及扫描电子显微镜等方法,对挤压轮用H13热作模具钢经不同的锻后热处理工艺后的组织性能进行研究.结果表明,快冷等温球化退火工艺能有效抑制二次碳化物沿晶界析出,使合金元素更加细小弥散的分布在基体上,H13钢淬回火后晶粒明显细化,冲击韧性明显提高.By means of metallographic method,impact toughness test and SEM, the mierostructure and properties of forged HI3 hot work die steel by different annealing processes are investigated. The results show that the isothermal spheroidizing process with faster cooling speed can effectively inhibit secondary carbides precipitating along intergranular, and make alloying elements distribute on matrix more fine and dispersed. This process can obviously refine the grain size and improve impact toughness after quenching and tempering treatments.

关 键 词：H13热作模具钢 等温球化退火 二次碳化物 冲击韧性 

分 类 号：TG161[金属学及工艺—热处理]