热处理工艺对双金属带锯条背材用钢RM80组织和性能的影响  

Effect of Heat Treatment Process on Structure and Properties of RM80 Steel for Bimetal Band Saw Blade

作　　者：陈刚[1] 孙瑜蔓 苏斌[1] 曾斌[2] 齐江华 CHEN Gang;SUN Yuman;SU Bin;ZENG Bin;QI Jianghua(School of Materials Science and Engineering,Hunan University,Changsha 410012,Hunan,China;Technical Center,Hunan Valin Lianyuan Iron and Steel Co Ltd,Loudi 417009,Hunan,China)

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410012 [2]湖南华菱涟源钢铁有限公司技术中心,湖南娄底417009

出　　处：《矿冶工程》2023年第5期174-177,共4页Mining and Metallurgical Engineering

摘　　要：采用扫描电镜、洛氏硬度计和万能试验机研究了不同热处理工艺对RM80钢显微组织和力学性能的影响。结果表明,随着淬火温度升高,RM80钢中碳化物逐渐溶解,原奥氏体晶粒不断长大;在回火过程中,RM80组织由回火屈氏体转变为回火索氏体,且在较高温度淬火再回火后的RM80组织中仍能看到马氏体形态。经1 150℃淬火和550℃三次回火后,RM80钢可以实现强度和塑性的良好匹配,其屈服强度为1 244 MPa,抗拉强度为1 590 MPa,延伸率为12.0%。The effects of different heat treatment processes on the microstructure and mechanical properties of RM80 steel were studied by means of scanning electron microscopy,Rockwell hardness tester and universal testing machine.As quenching temperature increases,carbides in RM80 steel gradually dissolve and the original austenite grains continue to grow.During tempering process,the structure of RM80 steel changes from tempered troostite to tempered sorbite,and martensite can still be observed in the structure of RM80 that is tempered after quenching at a higher temperature.After quenching at 1150℃and then three times of tempering at 550℃,RM80 steel finally has a good match between strength and plasticity,with a yield strength of 1244 MPa,a tensile strength of 1590 MPa,and an elongation of 12.0%.

关 键 词：双金属带锯条 RM80钢 热处理 显微组织 淬火 回火 碳化物 

分 类 号：TG161[金属学及工艺—热处理]