CoCrMo和CoCrMoW合金的组织结构、力学性能及在小牛血清溶液中的腐蚀摩擦学性能研究

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中文摘要：为了明确CoCrMo和CoCrMoW合金在小牛血清溶液中的腐蚀摩擦行为和耐腐蚀磨损机制,使用真空熔炼技术制备CoCrMo和CoCrMoW合金,采用SEM-EDS、TEM、XRD、压缩力学性能试验和腐蚀磨损试验研究2种合金的组织结构、力学和腐蚀摩擦学性能.结果表明:2种合金均由γ-Co和ε-Co组成,且微观组织以等轴晶为主.CoCrMo合金展现出优异的压缩力学性能,且其在小牛血清溶液中具有良好的耐腐蚀性,而CoCrMoW合金出现点蚀.2种合金在小牛血清溶液中具有较好的腐蚀摩擦学性能,其摩擦系数和磨损率分别为0.11～0.21和1.01×10-6～2.46×10-6mm3/(N·m).随着载荷和频率的增加,2种合金的摩擦系数降低,实时摩擦系数稳定性提高.在低载荷条件下,合金的耐腐蚀磨损性能随频率的增大而增强,其磨损机制以磨粒磨损为主;在高载荷条件下,合金的磨损率随频率的增加而增大,磨粒磨损和腐蚀磨损并存.总体而言,CoCrMo合金的耐腐蚀磨损性能优于CoCrMoW合金,这主要是因为CoCrMo合金具有较好的压缩力学性能和耐腐蚀性能.

外文标题：Research on the Structural,Mechanical and Corrosion Tribological Properties of CoCrMo and CoCrMoW Alloys in Calf Serum Solution

外文摘要：In order to clarify the corrosion friction behavior and corrosion wear resistance mechanism of CoCrMo and CoCrMoW alloys in calf serum solution,CoCrMo and CoCrMoW alloys were prepared using the vacuum melting technique,and the microstructure,mechanical and cor-rosion tribological properties of the two alloys were investigated by means of scanning electron microscopy( SEM),energy-dispersive spectrosco-py( EDS),transmission electron microscope( TEM),X-ray diffraction( XRD),compression mechanical performance experiments and corro-sion wear tests. Results showed that the two alloys were composed of γ-Co and ε-Co,and the microstructure was dominated by equiaxial crys-tals. CoCrMo alloy exhibited excellent compressive mechanical properties and good corrosion resistance in calf serum solution,while pitting cor-rosion occurred in the CoCrMoW alloy. The two alloys showed good corrosion tribological properties in calf serum solution,with friction coeffi-cients and wear rates of 0.11～0.21 and 1.01×10-6～2.46×10-6 mm3/(N·m),respectively. The friction coefficients of the two alloys de-creased with the increase in load and frequency,and the stability of real-time friction coefficients increased. At low loads,the corrosive wear resistance of the alloys increased with frequency,and their wear mechanisms were dominated by abrasive wear. At high loads,the wear rate of the alloys increased with frequency,and abrasive wear and corrosive wear coexisted. Overall,the corrosion wear resistance of CoCrMo alloy was better than that of CoCrMoW alloy,which was mainly due to the better compressive mechanical properties and corrosion resistance of CoCrMo alloys.

外文关键词：

CoCrMo series alloysmicrostructuremechanical propertiescorrosion tribological propertiescorrosion and wear resistance mechanism

作者：

王江、马玉天、程少逸、张东、孟军虎、辛本斌

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作者单位：

金川集团股份有限公司镍钴共伴生资源开发与综合利用全国重点实验室,甘肃金昌 737100

中南大学材料科学与工程学院,湖南长沙 410000

中国科学院兰州化学物理研究所先进润滑与防护材料研究发展中心,甘肃兰州 730000

关键词：

CoCrMo系合金微观组织力学性能腐蚀摩擦学性能腐蚀耐磨机制

基金：

工信部生物医用材料创新任务揭榜挂帅项目第十九批次西部之光访问学者培养任务甘肃省重点人才项目金川集团重点科研项目

项目编号：

2022RCXM0062023-03

出版年：

2024

DOI：

10.16577/j.issn.1001-1560.2024.0153

材料保护

武汉材料保护研究所,中国腐蚀与防护学会中国表面工程协会

材料保护

CSTPCD

影响因子：1.129

ISSN：1001-1560

年,卷(期)：2024.57(7)