摘要
利用高频感应熔覆技术在35CrMo钢表面制备了镍基自润滑稀土复合涂层,并在不同温度下对其进行固溶处理。借助光学显微镜(OM)、扫描电镜(SEM)、X射线衍射仪(XRD)、维氏显微硬度计及摩擦磨损实验机等研究了不同温度固溶处理对涂层微观组织、显微硬度与耐磨性的影响。结果表明:固溶处理后,元素扩散充分,枝晶形式逐渐单一,界面处组织形态大都从柱状树枝晶转变为胞状树枝晶;850℃固溶处理后,复合涂层的主要物相为γ-(Ni,Fe)、Cr(Fe-Ni-Cr)、Ni_(3)Fe、TiC、Cr_(23)C_(6)与CrB相;平均显微硬度最高,达到867.7 HV0.2,摩擦系数、磨损量均较小,与固溶前的涂层相比分别降低17.21%与21.66%,相对耐磨性较大,为2.46。
Nickel-based self-lubricating rare earth composite coating was prepared on the surface of 35CrMo steel by high-frequency induction cladding technology,and it was subjected to solution treatment at different temperatures.The effects of solution treatment at different temperatures on the microstructure,microhardness and wear resistance of the coating were studied by means of optical microscope(OM),scanning electron microscopy(SEM),X-ray diffraction(XRD),Vickers microhardness tester and friction and wear testing machine.The results show that after solution treatment,the elements diffuse fully,the dendritic form gradually becomes single,and the microstructure at the interface mostly changes from columnar dendritic to cellular dendritic.After solution treatment at 850℃,the main phases of the composite coating areγ-(Ni,Fe),Cr(Fe-Ni-Cr),Ni_(3)Fe,TiC,Cr_(23)C_(6) and CrB phases,the average microhardness is the highest,reaching 867.7 HV0.2,the friction coefficient and wear amount are relatively small,which are reduced by 17.21%and 21.66%respectively compared to the coating before solution treatment,and the relative wear resistance is relatively high,which is 2.46.
作者
黄本生
伍艳秋
陈灵芝
王晓威
唐景黎
HUANG Ben-sheng;WU Yan-qiu;CHEN Ling-zhi;WANG Xiao-wei;TANG Jing-li(School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China;Energy Equipment Institute,Southwest Petroleum University,Chengdu 610500,China)
出处
《材料热处理学报》
CAS
CSCD
北大核心
2023年第9期169-177,共9页
Transactions of Materials and Heat Treatment
基金
南充市市校科技合作战略合作项目(SXHZ032)。
关键词
复合涂层
固溶温度
显微组织
显微硬度
耐磨性
composite coating
solution temperature
microstructure
microhardness
wear resistance
作者简介
黄本生(1969-),男,教授,博士,主要从事材料连接、表面工程等研究,发表论文140余篇,E-mail:hbslxp@163.com。
