5CrMnMo钢热锻模具的复合等温热处理工艺研究  

Study on Composite Isothermal Heat Treatment Process of 5CrMnMo Steel Hot-forging Die

作　　者：王增强[1] 李明珠[1] 

机构地区：[1]西京学院机电工程系,陕西西安710123

出　　处：《热加工工艺》2014年第24期207-208,212,共3页Hot Working Technology

摘　　要：在对5Cr Mn Mo钢制造的球头座热锻模具失效分析的基础上,研究复合等温热处理对5Cr Mn Mo钢组织、性能及断口形貌的影响。研究认为：5Cr Mn Mo钢热锻模经860℃淬火＋280℃等温＋440℃回火,使模具心部获得回火下贝氏体组织,硬度45~48 HRC,可以有效地防止热锻模具脆裂,模具寿命可得到显著提高,具有明显的经济效益。On the basis of failure analysis of ball seat hot-forging die made of 5CrMnMo steel, influences of composite isothermal heat treatment process on organization, properties and fracture morphology on 5CrMnMo steel were researched. Studies suggest that tempering binate is obtained in the centre of die after heating quenching at 860℃, isothermal heat treatment at 280℃ and tempering at 440 ℃. Hardness of the binate reaches 45-48 HRC, which can effectively prevent hot-forging die from presenting embrittlement, thus significantly improve die life. It has obvious economic benefit.

关 键 词：5CRMNMO钢 热锻模具 复合等温热处理 热处理工艺 

分 类 号：TG156.3[金属学及工艺—热处理]