超音速等离子喷涂WC-17Co纳米涂层的性能  

Properties of Supersonic Plasma Sprayed WC-17Co Nano-coating

作　　者：李万青[1] 林铁松[1] 宋超群[1] 何鹏[1] 王启越 

机构地区：[1]哈尔滨工业大学先进焊接与连接国家重点实验室,黑龙江哈尔滨150001

出　　处：《稀有金属材料与工程》2017年第3期807-811,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(51275135;51321061;51474081)

摘　　要：采用超音速等离子喷涂在0Cr13Ni5Mo不锈钢表面制备了纳米和微米WC-17Co涂层,并对比了2种涂层的孔隙率、结合强度、硬度和耐磨性。结果表明,纳米涂层的致密性和结合强度均高于微米涂层,其孔隙率仅为0.56%,结合强度大于69.2 MPa;纳米涂层和微米涂层的硬度是基体的3.9和3.8倍,硬度值从涂层的表面到底部逐渐增加;基体磨损为磨粒磨损+粘着磨损+层状剥落,2种涂层磨损均为磨粒磨损。纳米涂层的孔隙率低、硬度高、表面抗压性强使其表现出更优的耐磨性。The nano and micro WC-17 Co coatings were fabricated on the 0Cr13Ni5 Mo stainless steel by supersonic plasma spraying. Their porosity, adhesive strength, hardness and wear resistance of both coatings were compared. The results indicate that the porosity（0.56%）and adhesive strength（over 69.2 MPa） of the nano-coating are higher than those of the micro-coating. The hardness of the nano-coating and the micro-coating are 3.9 and 3.8 times more than that of matrix, respectively. The hardness of both coatings gradually increases from top to bottom. The wear mechanisms of matrix are adhesive wear, abrasive wear and delamination, while the coatings only suffers adhesive wear. The lower porosity, higher hardness and stronger compressive resistance of the nano-coating result in its excellent wear resistance.

关 键 词：超音速等离子喷涂 纳米涂层 WC-17Co 磨损 

分 类 号：TG174.442[金属学及工艺—金属表面处理]