【作者】 陈长军； 张敏； 张诗昌； 常庆明； 费群星；

【Author】 CHEN Chang-jun;ZHANG Min;ZANG Shi-chang;CHANG Qing-min;FEI Qun-xing;Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Laser Processing Research Center,College of Materials & Metallurgy,Wuhan University of Science and Technology;Key Laboratory for High Energy Density Beam Processing Technology,Beijing Aeronautical Manufacturing Technology Research Institute;Department of Materials Engineering,Shenyang Institute of Aeronautical Engineering;

【机构】 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室材料与冶金学院激光加工中心； 北京航空制造工程研究所高能束流国防科技重点实验室； 沈阳航空工业学院材料工程系；

【摘要】 激光熔覆技术可以在基体表面熔化沉积出一层防护涂层。本文则在in718高温合金上制备防护涂层时激光加工参数对形成涂层的影响进行了实验研究。实验研究的目标首先是瑶获得无裂纹和气孔的涂层。但试验中在某些参数下依然有一定的气孔和裂纹存在。显微硬度沿截面的分布曲线也进行了测试。同时对裂纹敏感性也进行了分析。然而,在本实验之后仍然有许多优化实验需要进行以提高熔覆质量。更多还原

【Abstract】 Laser cladding is an important process that allows the deposition of thick protective coatings on substrates.The article presents an experimental investigation of the influence of processing parameters on clad layer in laser cladding by powder on In718 superalloy.A crack-free and no porosity coating is the goal of the study.Some scattered pores and cracks were still observed in the present work.The microhardness distribution is revealed too across the cross-section.And the crackSensitivity forming is analysised.However,more works on the process optimization are required to further improve the cladding quality.更多还原