机械用钢12MnNiVR的回火工艺研究  

Study on Tempering Process of Mechanical Steel 12MnNiVR

作　　者：顾元国[1] 

机构地区：[1]四川工商职业技术学院,四川成都611837

出　　处：《热加工工艺》2015年第22期152-153,156,共3页Hot Working Technology

基　　金：四川省教育发展研究中心课题资助(CJF3041)

摘　　要：对某钢厂生产的12MnNiVR在不同温度下进行回火试验,对回火后的试样进行力学性能测试,并借助扫描电镜观察回火后的冲击试样断口形貌。结果表明:经回火处理后,12MnNiVR材料的抗拉强度急剧下降,冲击韧度大幅改善,其最佳回火温度为630℃。回火后材料的断口呈韧窝状,其中的夹杂物多为Al_2O_3、TiO_2和MnS的复合型夹杂。The 12MnNiVR steel was tempered at different temperatures. After tempering, the mechanical properties were tested and morphology of impact specimen fracture was observed by SEM. The results show that： after tempering treatment, the tensile strength of the material 12MnNiVR declines sharply and the toughness improves significantly; the optimum tempering temperature is 630℃. After tempering, the fracture characteristics of the material shows dimples and inclusions generally include Al2O3, MnS and TiO2 or more complex inclusions.

关 键 词：12MnNiVR 回火 力学性能 断口形貌 

分 类 号：TG156.4[金属学及工艺—热处理]