合金元素对新型Co-Al-W合金摩擦磨损性能的影响  

Effect of Alloying Elements on Friction and Wear Performance of Novel Co-Al-W Superalloys

作　　者：徐仰涛[1] 夏天东[1] 赵文军[1] 王晓军[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室有色金属合金及加工教育部重点实验室,甘肃兰州730050

出　　处：《稀有金属材料与工程》2013年第1期75-79,共5页Rare Metal Materials and Engineering

基　　金：2009年中国科学院"西部之光"(0901ZBB066);甘肃省中青年科技基金计划(099RJYA018);兰州理工大学2011年优秀青年教师培养计划项目(1001ZCX009);兰州理工大学博士科研启动基金(X1001XC021)

摘　　要：Co-Al-W合金是由γ′-Co3(Al,W)相沉淀强化的新型钴基高温合金。为了研究合金元素Mo、Nb、Ta和Ti对Co-Al-W合金摩擦磨损性能的影响,采用THT07-135型摩擦磨损试验机、SEM等方法研究合金化Co-Al-W合金的室温摩擦磨损性能,并与钴基Stellite6合金相比较。研究发现,9.8W合金的摩擦系数比钴基Stellite6的小。合金元素Mo、Nb、Ti可适度降低9.8W合金的磨损失重和摩擦系数,提高其耐磨性能。Mo、Ti和Nb元素对提高9.8W合金的耐磨性能效果较好;Ta的效果不明显。Co-Al-W合金主要发生氧化磨损和磨粒磨损,但Stellite6合金主要发生剥层和磨粒磨损。Novel Co-Al-W superalloy is a novel Co-base superalloy, with the precipitation strengthening by a ternary compound γ-Co3（AI,W） phase on γ-Co matrix. The effect of alloying element Mo, Nb, Ta and Ti on friction and wear performance of Co-AI-W superalloys at room temperature was studied by THT07-135 type friction and wear tester and SEM, and cobalt-based Stellite 6 alloy was employed for comparison. Results show that the friction coefficient of 9.8W superalloy is smaller than that of cobalt-based Stellite 6 Alloying elements Mo, Nb and Ti can moderately reduce wear mass loss and friction coefficient of 9.8W superalloy, and improve the wear resistance. The Mo, Ti and Nb elements can clearly improve the wear resistance of 9.8W superalloy while the effect of Ta element is not obvious. The wear mechanism of Co-Al-W superalloy is mainly oxidation and abrasive wear, while that of Stellite 6 alloy mainly is delamination and abrasive wear .

关 键 词：CO-AL-W合金 合金元素 摩擦磨损 机制 

分 类 号：TG132.32[一般工业技术—材料科学与工程]