热处理工艺对H13热作模具钢组织与性能的影响  

Effects of Heat Treatment Process on Microstructure and Properties of H13 Hot-working Die Steel

作　　者：万霄 陈瑞航 王颜 刘佳欣 李长生(指导)[2] Wan Xiao;Chen Ruihang;Wang Yan;Liu Jiaxin;Li Changsheng(School of Materials Science and Engineering,Northeastern University;State Key Laboratory of Rolling and Automation,Northeastern University)

机构地区：[1]东北大学材料科学与工程学院 [2]东北大学轧制技术与连轧自动化国家重点实验室

出　　处：《宽厚板》2020年第5期18-22,35,共6页Wide and Heavy Plate

基　　金：国家重点研发计划“高性能模具钢及应用”项目(2016YFB0300402)。

摘　　要：冲击韧性作为评价H13热作模具钢质量的标准之一,受锻后热处理工艺影响较大。利用箱式电阻炉对H13锻坯试样进行一系列热处理实验,研究热处理过程中正火冷却方式和亚温淬火对H13钢微观组织和力学性能的影响。结果显示:正火后采用空冷冷却方式可以获得均匀的退火态组织。亚温淬火可以显著提高H13钢的冲击韧性,淬火温度为900℃时,冲击功为17.2 J,硬度为HV575,强韧性匹配达到最佳。Generally being taken as one criteria to evaluate the quality of H13 hot-working die steel,impact toughness is greatly affected by heat treatment process after forging.In order to investigate the effects of the cooling type after normalizing and subcritical quenching on microstructure and mechanical properties of H13 steel,a series of heat treatment experiments are implemented on the sample from H13 forging stock in box-type electric resistance furnace.The results show that homogeneous annealing microstructure can be obtained by using air cooling after normalizing.Impact toughness of H13 steel can be significantly improved by subcritical quenching,strength and toughness matching is optimal,impact energy value is 17.2 J,hardness is HV575 when quenching temperature is 900℃.

关 键 词：H13钢 正火处理 冷却方式 亚温淬火 冲击功 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG156[金属学及工艺—金属材料]