摘要
喷涂路径是影响电弧喷涂层残余应力的重要因素之一.利用自行开发的自动化电弧喷涂系统设计了四种典型的喷涂路径,采用X射线残余应力测试仪测量了不同路径下制备的82B高碳钢涂层的表面残余应力分布,并利用金相显微镜和X射线衍射仪分析了涂层的组织形貌与相组成.试验显示,"环形"喷涂路径制备的涂层的残余应力分布最均匀,最大应力值最低;"平行对称"路径的情况最差.组织分析表明涂层主要由氧化物和块状马氏体组织组成.最后探讨了高碳钢涂层骤冷应力、热应力和相变应力三种因素的影响机理.
Path-plan is one of the important aspects affecting the residual stresses of arc sprayed coatings. Four types of spraying paths were designed based on an automatic arc spraying system. The 82B high carbon steel coatings were prepared by using the designed paths, and the residual stresses on the as-sprayed coating surfaces were measured with an X-ray residual stress tester. The structure and phase composition of the steel coating were also investigated with a metallographic microscope and an X-ray diffraction instrument, respectively. The experimental results show that the distribution of the residual stresses for the coating prepared by the 'ring inward' type spraying path is the most uniform, and the stress peak value is the lowest in other coatings; but the distribution of 'parallel and symmetric' type path is the worst. The coating microstructure is mainly featured by block-like martensite and oxide. Based on these investigations, the formation mechanism of the quench stress, thermal stress and the stress induced from phase transformation of the high carbon steel coating material was discussed.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2010年第8期97-100,共4页
Transactions of The China Welding Institution
基金
国家科技支撑计划基金资助项目(2006BAF02A19)
中国机械工程学会焊接学会创新思路预研奖学金资助项目(08-12-001)
关键词
电弧喷涂
高碳钢涂层
残余应力
路径规划
electric arc spraying
high carbon steel coating
residual stress
path-plan
