稀土(镝)对钨钼表面高速钢摩擦性能的影响  

Effect of rare earth Dy on friction properties of surface high-speed steel

作　　者：韦文竹[1] 高原[1] 陆小会[1] 张光耀[1] 彭凯[1] 宋沂泽 

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004

出　　处：《材料热处理学报》2015年第8期191-197,共7页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51264007);国家自然科学基金青年基金(51201043);广西信息材料重点实验室项目(1210908-214-Z);桂林电子科技大学-桂林电器科学研究院研究生联合培养基地专项经费资助项目(20121225-01-Z;20121225-10-Z;20141103-09-Z);桂林电子科技大学研究生教育创新计划(GDYCSZ201433)

摘　　要：采用双层辉光等离子渗金属技术在Q235钢表面渗入钨、钼、镝,并进行渗碳淬火和回火以形成表面高速钢层。研究表面高速钢层的成分和显微硬度,并利用HSR-2M型高速往复摩擦磨损试验机进行摩擦磨损性能研究。结果表明:镝的加入可以提高碳钢表面钨,钼,碳元素的含量,使得表面高速钢层的表面硬度从1072 HV0.05提高到1153 HV0.05;在10 N,20 N,30 N,40 N的载荷下,钨钼镝表面稀土高速钢的平均摩擦系数分别是钨钼表面高速钢的0.98倍,0.9倍,0.77倍,1.24倍;磨损体积分别是钨钼表面高速钢的0.98倍,0.76倍,0.93倍,0.83倍;在往复干摩擦条件下,钨钼表面高速钢的磨损失效形式主要是粘着磨损;加入镝后,失效模式改变为磨粒磨损,摩擦系数降低,显示出良好的减摩性能。W-Mo-Dy surface high-speed steel were prepared by double glow plasma surface alloying technology on Q235 steel surface and then carburizing, quenching and tempering were carried out. Composition and micro-hardness of the surface high-speed steel layer were examined, and wear-properties of the surface high-speed steel layer was studied on a HSR-2M high-speed reciprocating friction tester. The results show that Dy addition is favorable to the increase of the content of W, Mo, C, which makes the hardness of surface high-speed steel layer increase from 1072 HV0.05 to 1153 HV0.05. Under the loads of 10 N, 20 N, 30 N and 40 N, the average friction coefficient of W-Mo-Dy surface rare-earth high-speed steel is 0. 98 times, 0.9 times, 0.77 times and 1.24 times as that of W-Mo surface high-speed steel, respectively, while the wear volume loss of W-Mo-Dy surface high-speed steel is lower than that of W-Mo surface high-speed steel. Under dry reciprocating rubbing, the main failure modes of W-Mo surface high-speed steel and W-Mo-Dy surface high-speed steel are adhesive wear and abrasive wear, respectively.

关 键 词：稀土 表面高速钢 磨擦性能 

分 类 号：TG156.8[金属学及工艺—热处理]