等离子弧喷焊Mo涂层微观组织结构及摩擦磨损性能研究  

STUDY ON MICROSTRUCTURE AND WEAR PROPERTIES OF MOLYBDENUM COATING FABRICATED USING PLASMA TRANSFERRED ARC PROCESS

作　　者：邓新科 张国君[1] 王涛[1] 任帅 柏忠炼 曹潜 

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《中国钼业》2018年第1期43-46,共4页China Molybdenum Industry

基　　金：国家自然科学基金资助(51674196);西安理工大学博士创新基金资助(310-252071502)

摘　　要：本文采用等离子弧喷焊技术,在45钢板材表面喷焊制备了Mo涂层,通过XRD对涂层物相组成进行了检测,利用SEM观察了涂层微观组织形貌,并对涂层的显微硬度和摩擦磨损性能进行了检测。研究结果表明,所制备的Mo涂层组织均匀致密,无明显孔洞、裂纹等缺陷,并与45钢基体实现了冶金结合;涂层主要物相为!-Fe固溶体,金属间化合物R-Fe_(63)Mo_3和μ-Fe_7Mo_6相;涂层硬度相对于基体提高了4倍;Mo涂层的相对耐磨性是45钢基体的15倍且摩擦系数降低了19%,磨损表面生成的MoO_3起到了润滑作用。Mo coating was prepared on the 4 5# carl^on steel substrate through plasma transferred arc microstructure was characterized by XRD, SEM. The microhardness and wear properties were also tested. The sults show that tlie Mo coating is free of cracks and pores and a metallurgical bonding is ing and the substrate. The Mo coating consists of a - Fe solid solution, R - Fe63Mo3, and !-Fe〉Mo6. The microhard-ness is 4 times higher than that of the substrate. And the relative wear resistance is 15 times higher than that of the substrate, and the friction coefficient is reduced by 1 9 % compared to the substrate, which can be ascribed to the combined effect of the hard intermetallics and the lubricated M0O3 formed on the wear tracks.

关 键 词：等离子弧喷焊 M〇涂层 金属间化合物 摩擦磨损行为 

分 类 号：TG146.412[一般工业技术—材料科学与工程]