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.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
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)
