H13热作模具钢热处理工艺研究  

Study on Heat Treatment Process of H13 Hot Work Die Steel

作　　者：马鸣蔚 唐亮 刘馨忆 李天祥 胡敏 李晋[1] 王旭[1] MA Mingwei;TANG Liang;LIU Xinyi;LI Tianxiang;HU Min;LI Jin;WANG Xu(School of Mechanical Engineering,Liaoning Petrochemical University,Fushun 113001,China;Dalian Changzhilin Technology Co.,Ltd.,Dalian 116000,China;College of Pipeline and Civil Engineering,China University of Petroleum,Qingdao 266555,China;Pertrochina Planning and Engineering Institute,Beijing 100000,China)

机构地区：[1]辽宁石油化工大学机械工程学院,辽宁抚顺113001 [2]大连长之琳科技股份有限公司,辽宁大连116000 [3]中国石油大学储运与建筑工程学院,山东青岛266555 [4]中国石油规划总院,北京100000

出　　处：《有色金属工程》2024年第6期9-16,25,共9页Nonferrous Metals Engineering

基　　金：国家自然科学基金资助项目(52274062)。

摘　　要：采用金相显微镜、扫描电镜、显微硬度仪及拉伸试验等设备研究了不同淬火温度和回火温度对H13热作模具钢的显微组织和力学性能的影响。结果表明:通过进行二次回火处理,并适当降低回火温度,可以有效地析出更多细小、弥散分布的碳化物,并充分释放淬火应力。H13热作模具钢的硬度和强韧性得到了显著提升。在淬火温度为1 000℃、回火温度为520℃进行二次回火时的力学性能较好,回火马氏体尺寸较小,组织分布更均匀。此条件下的硬度为487 HV,抗拉强度可达到1 779 MPa,伸长率为11.5%。通过拉伸断口形貌的分析可看出,经过回火工艺处理后的样品断口呈现出大量的韧窝,其断裂特征表现为典型的韧性断裂。此外,还对H13钢在520~600℃回火过程中的软化行为进行了动力学建模。The effects of quenching and tempering temperatures on the microstructure and mechanical properties of H13 hot work die steel were investigated by using metallographic microscopy,scanning electron microscopy,microhardness testing,and tensile testing.The findings revealed that secondary tempering treatment and appropriate reduction in tempering temperature result in the effective precipitation of finer and more dispersed carbides and the complete release of quenching stress.As a result,the hardness and toughness of H13 hot work die steel were significantly improved.Notably,when the quenching temperature was 1000℃and the tempering temperature was 520℃,the mechanical properties are superior,characterized by smaller tempering martensite size and more uniform structural distribution.Under these conditions,the hardness measureed 487 HV,the tensile strength reached 1779 MPa,and the elongation was 11.5%.The analysis of the tensile fracture morphology reveals the presence of numerous dimples in the specimen after the tempering process,indicative of typical ductile fracture characteristics.Furthermore,a model was developed to describe the softening behavior of H13 steel during tempering in the temperature range of 520℃to 600℃.

关 键 词：H13热作模具钢 显微组织 力学性能 热处理 

分 类 号：TG161[金属学及工艺—热处理]