HB500低合金高强耐磨钢组织和性能  

Microstructure and property of HB500 low alloy high strength wear-resistant steel

作　　者：吴俊辉 官计生 刘曼 孙林宇 李彦龙 徐光[1] WU Junhui;GUAN Jisheng;LIU Man;SUN Linyu;LI Yanlong;XU Guang(State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Thickness Plate Research and Development Center,Central Research and Development Institute,Baoshan Iron and Steel Co.,Ltd.,Wuhan 430080,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 [2]宝钢股份中央研究院厚板所,湖北武汉430080

出　　处：《钢铁》2025年第1期147-158,共12页Iron and Steel

基　　金：中国博士后科学基金面上基金资助项目(2023M732721);湖北省自然科学基金资助项目(2023AFB023);武汉钢铁有限公司科研资助项目(QKY2023010)。

摘　　要：目前,中国高附加值的高级别耐磨钢仍依赖进口以弥补市场需求,从而导致维修和替换的维护成本和时间成本提高以及存在技术支持限制等问题。因此,从节省能源、提高经济效益的角度出发,亟需开发低成本高耐磨新型耐磨钢。通过光学显微镜、扫描电镜、透射电镜、X射线衍射分析、拉伸试验、冲击试验和滑动磨损等试验研究了新开发的HB500低合金高强耐磨钢的组织和性能,并与商用Hardox450钢进行对比分析,从成分和性能上评估HB500钢替代Hardox450钢在滑动磨损工况下应用的可能性。结果表明,从化学成分来看,HB500钢合金含量较低;从力学性能指标来看,HB500钢的抗拉强度为Hardox450钢的1.25倍,低温冲击吸收功为Hardox450钢的66%;从磨损性能来看,对比Hardox450钢,HB500钢在10、50、90 N下的相对磨损程度分别为89.7%、90.8%和99.0%,这表明HB500钢在较低载荷下更耐磨,而在高载荷下的磨损程度与Hardox450钢相当。因此,从成分和性能2方面考虑,HB500钢能够替代商用Hardox450钢。此外,不同于已报道的研究结果,本研究中当载荷从10 N增加至50 N时,质量损失随之显著增加,而随着载荷进一步增加至90 N时,磨损失重却少于50 N载荷下的失重。另外,摩擦因数随着载荷的增加和材料硬度的增加均呈下降趋势,但相较于硬度,摩擦因数对载荷的敏感性更高。研究结果为开发低成本、高耐磨的可替代商用Hardox450钢的新型耐磨钢提供了参考。At present,the high-grade wear-resistant steel with high additional value is still relied on imports to make up for the market demand in China.This leads to problems such as increased maintenance cost and time cost of maintenance and replacement,and limited technical support.Therefore,from the perspective of saving energy and improving economic benefits,it is urgent to develop new wear-resistant steel with low cost and high wear resistance.The microstructure and properties of newly developed HB500 grade low alloy high strength wear-resistant steel were studied by means of optical microscope,scanning electron microscope,transmission electron microscope,X-rays diffraction,tensile test,impact test and sliding wear test,and compared with commercial Hardox450 steel.The possibility of HB500 steel replacing Hardox450 steel in sliding wear condition was evaluated according to their composition and performance.The results show that the alloy content of HB500 steel is low with respect to composition.In terms of mechanical properties,the tensile strength of HB500 steel is 1.25 times that of Hardox450 steel,and the low-temperature impact toughness is 66%of Hardox450 steel.With regard to wear performance,compared with Hardox450 steel,the relative wear degrees of HB500 steel at 10,50,90 N are 89.7%,90.8%and 99.0%respectively,indicating that HB500 steel is more wear-resistant under lower load,while the wear degree under high load is comparable to that of Hardox450 steel.Therefore,HB500 steel can replace commercial Hardox450 steel from the perspective of composition and performance.Moreover,different from the reported results,when the load increases from 10 N to 50 N,the mass loss increases significantly,however,when the load further increases to 90 N,the mass loss is less than that under 50 N load.In addition,the friction coefficient decreases with the increase of load and material hardness,but the friction coefficient is more sensitive to load than hardness.The research results provide a reference for the development of new we

关 键 词：HB500钢 Hardox450钢 磨损性能 载荷 摩擦因数 耐磨钢 高附加值 抗拉强度 

分 类 号：TG142.72[一般工业技术—材料科学与工程]