淬火温度对ZG25MnCrNiMo钢组织与性能的影响  

Effect of quenching temperature on microstructure and properties of ZG25MnCrNiMo steel

作　　者：彭二宝[1,2] 陈昌铎[2] Peng Erbao;Chen Changduo(School of Mechanical and Electrical Engineering,Wuhan University of Technology,Wuhan Hubei 430070,China;Henan Polytechnic Institute,Nanyang Henan 473000,China)

机构地区：[1]武汉理工大学机电工程学院,湖北武汉430070 [2]河南工业职业技术学院,河南南阳473000

出　　处：《金属热处理》2020年第6期43-45,共3页Heat Treatment of Metals

基　　金：河南省科技厅科技攻关项目(142102310526)。

摘　　要：通过光学显微镜(OM)、拉伸试验机、冲击试验机等研究了不同温度淬火对ZG25MnCrNiMo钢组织及性能的影响。结果表明:淬火态ZG25MnCrNiMo钢组织为板条马氏体。在840~930℃温度区间,随着淬火温度的升高,组织中板条马氏体逐渐变细,930℃淬火试验钢板条最为细小。ZG25MnCrNiMo钢经840~930℃淬火后,进行600℃回火,随着淬火温度的升高,试验钢抗拉强度先升高后降低,伸长率和低温冲击吸收能量先降低后升高。930℃淬火试验钢抗拉强度最大,为992 MPa。840℃淬火试验钢伸长率和-40℃低温冲击吸收能量最大,分别为17.1%和78 J。Effect of quenching temperature on microstructure and properties of ZG25MnCrNiMo steel was studied by means of optical microscopy(OM),tensile test machine and impact test machine.The results show that the microstructure of quenched ZG25MnCrNiMo steel is lath martensite.In the temperature range from 840℃to 930℃,with the increase of quenching temperature,the lath martensite in the microstructure gradually becomes finer and reaches the finest at 930℃.The tensile strength of the ZG25MnCrNiMo steel quenched at 840-930℃and tempered at 600℃first increases and then decreases,and the elongation and low temperature impact absorbed energy first decreases and then increases.The tensile strength of the steel quenched at 930℃is the highest,which is 992 MPa.The elongation and-40℃low temperature impact absorbed energy of the steel quenched at 840℃are the largest,which are 17.1%and 78 J,respectively.

关 键 词：ZG25MnCrNiMo钢 淬火温度 组织 性能 

分 类 号：TG161[金属学及工艺—热处理]