HB550级低合金马氏体耐磨钢滑动磨损行为  

Sliding wear behavior of HB550 grade low-alloy martensite wear-resistant steel

作　　者：李彦龙 刘曼 孙林宇 吴俊辉 甘晓龙[1] 徐光[1] LI Yanlong;LIU Man;SUN Linyu;WU Junhui;GAN Xiaolong;XU Guang(State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081

出　　处：《钢铁钒钛》2025年第1期170-177,共8页Iron Steel Vanadium Titanium

基　　金：中国博士后科学基金面上资助(2023M732721)。

摘　　要：通过光学显微镜、扫描电镜、拉伸试验、维氏硬度计等设备分析了新开发的HB550低合金高强耐磨钢的微观组织和力学性能;利用磨损试验机和多功能材料表面性能综合测试仪研究了HB550马氏体耐磨钢在10、50 N和90 N载荷下的干滑动摩擦磨损行为和摩擦系数。结果表明,HB550低合金高强耐磨钢组织为回火马氏体,其屈服强度和抗拉强度均值分别为1521 MPa和1874 MPa,5 mm厚度试样在-40℃的低温冲击吸收功均值为18 J。随着载荷的增加,HB550钢的磨损失重呈先增加后下降趋势,而摩擦系数单调降低。HB550钢在低载荷下的磨损机制主要是磨粒磨损和黏着磨损,在高载荷下的磨损机制以黏着磨损为主,并伴随着氧化磨损。试验为HB550及以上高端耐磨钢的开发和应用提供了理论基础。The microstructure and mechanical properties of the newly developed HB550 low-alloy highstrength wear-resistant steel were studied through optical microscope,scanning electron microscopy,tensile tests,and Vickers hardness tests.Meanwhile,the sliding wear behavior and the friction coefficient of high grade HB550 martensite wear-resistant steel under the loads of 10,50 N and 90 N were systematically investigated by ML-100C wear testing machine and BMT-I multifunctional material surface performance tester,respectively.The results show that the microstructure of HB550 low-alloy highstrength wear-resistant steel was mainly tempered martensite.The mean yield strength and tensile strength as well as low temperature impact energy at-40℃with 5 mm thickness of this steel were 1521 MPa,1874 MPa and 18 J,respectively.Moreover,with increasing the load,the wear mass loss of HB550 steel increased first and then decreased,while the friction coefficient decreased monotonously.The wear mechanism of the developed steel grade HB550 under lower loads is mainly abrasive wear and adhesive wear,and the wear mechanism under high loads is mainly adhesive wear accompanied by oxidative wear.The research results provide a theoretical basis for the development and application of high-end wear-resistant steel HB550 and above.

关 键 词：HB550钢 磨损性能 摩擦系数 回火马氏体 力学性能 

分 类 号：TF76[冶金工程—钢铁冶金] TG142.72[一般工业技术—材料科学与工程]