不同退火工艺对H13钢组织和力学性能的影响  

Influence of different annealing process on microstructure and mechanical properties of H13 steel

作　　者：周健[1] 马党参[1] 张才明[1] 康爱军[2] 李向阳[1] 陈再枝[1] 

机构地区：[1]钢铁研究总院结构材料研究所,北京100081 [2]东北特殊钢集团有限责任公司技术中心,辽宁抚顺113001

出　　处：《金属热处理》2012年第5期53-58,共6页Heat Treatment of Metals

基　　金：国家十一五科技支撑计划(2007BAE51B04)

摘　　要：用OM、SEM研究了亚温退火、等温退火、缓慢冷却退火3种工艺对H13钢组织和力学性能的影响。结果表明,亚温退火后碳化物粒度最小,缓慢冷却退火后碳化物粒度较大,退火硬度较低;等温退火及缓慢冷却退火对提高碳化物尺寸、分布均匀性有一定作用,同时碳化物均匀性的提高对提升H13钢退火态及淬、回火态冲击韧性有一定作用,但组织中夹杂物、一次碳化物制约着H13钢韧性的提高。The influence of three different annealing process （subcritical annealing, isothermal annealing and slow cooling annealing） on microstructure and mechanical properties of H13 steel was investigated by metallographic microscope and SEM. The resuhs show that after subcritical annealing, carbides grain size is minimum, while after slow cooling annealing, carbides grain size is larger and the annealed hardness is lower＇. The isothermal annealing and slow cooling annealing are propitious to homogeneity eft carbides, at the same time, the improvement of homogeneity of carbides also has some good effect on annealed and quenched-tempered impact toughness of H13 steel, however nonmetallic inclusions and primary carbides restrict the improvement of toughness of H13 steel.

关 键 词：H13钢 退火工艺 碳化物 均匀性 冲击韧性 

分 类 号：TG142.45[一般工业技术—材料科学与工程]