金属加工（热加工）Issue(8)：9-16,8.
车用不锈钢表面激光定向能量沉积WC/Co基复合强化涂层研究
Research on laser directed energy deposition of WC/Co-based strengthened coating on the surface of automotive stainless steel
摘要
Abstract
To enhance the wear resistance and service life of automotive 304 stainless steel surfaces,WC/Co-based composite reinforced coatings were fabricated via laser directed energy deposition.The effects of different WC particle contents on the micro structure and properties of the coatings were systematically investigated.Through optical microscopy observation,X-ray diffraction analysis,hardness testing,and friction and wear experiments,the evolution of the microstructure,phase composition,hardness variations,and wear resistance of the coatings were comprehensively analyzed.The results show that the coatings mainly consist of fcc-Co,Co6W6C,Fe6W6C,and W2C phases.With the increase of WC particle content,the proportion of hard phases rises and significant grain refinement occurs.Both macro-and micro-hardness of the coatings increase markedly with higher WC content,reaching 86.4HRA and 1123.7HV0.5 when the WC content is 40％.Meanwhile,the wear rate of the coatings decreases significantly with the addition of WC particles,and the wear resistance is substantially improved.The enhancement in mechanical properties is attributed to second-phase strengthening,grain refinement strengthening,and dispersion strengthening mechanisms induced by WC particles.This study provides theoretical guidance and technical support for the surface modification and strengthening of automotive stainless steel components.关键词
激光定向能量沉积/车用不锈钢/WC/Co复合涂层/微观组织/耐磨性Key words
laser directed energy deposition/automotive stainless steel/WC/Co composite coating/microstructure/wear resistance引用本文复制引用
李政昂,胡洪铭..车用不锈钢表面激光定向能量沉积WC/Co基复合强化涂层研究[J].金属加工（热加工）,2025,(8):9-16,8.基金项目
中国博士后科学基金资助项目(2023M731481). （2023M731481）
