镍基高温合金激光修复工艺研究  

Research on Laser Repair Process of Ni-based Superalloy

作　　者：徐子法 焦俊科[2,3,4,5,6] 张正 杨亚鹏 张文武 XU Zifa;JIAO Junke;ZHANG Zheng;YANG Yapeng;ZHANG Wenwu(Faculty of Mechanical Engineering and Mechanics,Ningbo University,Ningbo 315211;Ningbo Institute of Industrial Technology,CAS,Ningbo 315201)

机构地区：[1]宁波大学机械工程与力学学院,宁波315211 [2]中国科学院宁波材料技术与工程研究所,宁波315201 [3]中国机械工程学特种加工分会第11届委员会 [4]美国激光学会 [5]中国机械工程学会 [6]中科院青年创新促进会

出　　处：《材料导报》2019年第19期3196-3202,共7页Materials Reports

基　　金：宁波市国际合作项目(2017D10007);国家自然科学基金“两化融合”重点项目(U1609208);中国科学院青年创新促进会资助(2017343);国家商用飞机制造工程技术研究中心创新基金(COMAC-SFGS-2017-36734);中国科学院科技服务网络计划(STS计划)(KFJ-STS-SCYD-110)~~

摘　　要：为实现Inconel718高温合金裂纹全激光修复,本工作先采用短脉冲激光对裂纹进行清洗和刻蚀修形,再采用高功率连续激光进行修复。重点研究了激光功率、扫描速度和离焦量等参数对合金的修复形貌、修复区显微组织、物相组成和力学性能的影响规律。结果表明:通过控制工艺参数(激光功率、扫描速度、离焦量)可以得到无缺陷的修复试样;Inconel718镍基高温合金粉末在高能激光束的作用下可以与Inconel718基体实现良好的冶金结合,且没有新的物相生成;修复区显微硬度为基体的87%~88%,抗拉强度约为基体的89%。In order to realize the full laser repair of Inconel718 superalloy cracks,the short pulse laser was used to clean and etch the cracks,and the high-power continuous laser was used to repair the cracks.The influence of parameters such as laser power,scanning speed,and defocus amount on repair morphology,microstructure,phase composition and mechanical property was studied.The results show that a defect-free repair specimen can be obtained by controlling the process parameters (laser power,scanning speed,defocusing amount),and the Inconel718 Ni-based superalloy powder and Inconel718 matrix can be bonded metallurgically without new phase formation,the microhardness of the repair zone is 87%-88% of the matrix,and the tensile strength is 89% of the matrix.

关 键 词：激光熔覆 镍基高温合金 缺陷控制 显微组织 

分 类 号：TG44[金属学及工艺—焊接] TG43