脉冲激光增材修复TC1格栅结构组织及力学性能  

Microstructure and Mechanical Properties of TC1 Lattice Parts Repaired by Pulse-Laser Additive Manufacturing Method

作　　者：刘亮 戴冠帮 陈体磊 赵天碕 王志国[2,4] 赵宇辉[2,4] Liu Liang;Dai Guanbang;Chen Tilei;Zhao Tianqi;Wang Zhiguo;Zhao Yuhui(State-Owned Wuhu Machinery Factory,Wuhu 241007,Anhui,China;Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang l10016,Liaoning,China;School of Mechanical Engineering and Automation,University of Science and Technology Liaoning,Anshan 114051,Liaoning,China;Institutes for Robotics and Intelligent Manufacturing,Chinese Academy of Sciences,Shenyang 110169,Liaoning,China)

机构地区：[1]国营芜湖机械厂,安徽芜湖241007 [2]中国科学院沈阳自动化研究所,辽宁沈阳110016 [3]辽宁科技大学机械工程与自动化学院,辽宁鞍山114051 [4]中国科学院机器人与智能制造创新研究院,辽宁沈阳110169

出　　处：《应用激光》2024年第7期49-56,共8页Applied Laser

基　　金：国家自然科学基金(52105415);中国科学院青年促进会会员(2022200);广东省基础与应用基础研究基金(2020B1515120027)。

摘　　要：针对航空TC1合金薄壁精细结构高性能修复难题,开展薄板和格栅结构脉冲激光增材修复工艺研究,通过宏观和微观组织分析、板状试样拉伸、格栅试样模拟压缩等系统评价了修复质量。结果分析表明:而在激光功率600~1000 W、脉冲时间100 ms的工艺条件下,修复区域与基体呈现良好的冶金结合,在脉冲激光修复高温度梯度条件下,可以形成相比于原始格栅破坏位置组织更加细小且体积比更多的针状马氏体α′相;同时脉冲激光修复薄板样件的抗拉强度和屈服强度略高于锻造态,而延伸率呈一定程度下降。经过脉冲修复的格栅试样,在模拟条件压缩过程中的最大平均破坏力从原始态2.5 kN提升到3.58 kN。This paper addresses the challenge of high-performance repair for thin-walled aeronautical TC1 structures by investigating the pulsed-laser additive manufacturing process for repairing thin sheets and lattice structures.The repair quality was assessed through microstructural and macrostructural analyses,as well as tensile tests on TC1 sheets and compression tests on aeronautical lattice structures.The results showed that the repair area shows good metallurgical bonding with the substrate under the conditions:laser power of 600~1000 W and pulse time of 100 ms.Higher volume fraction of finerα′martensite structure can be obtained,becaused of the high temperature gradient during the repairing process by a pulsed laser.Moreover,the tensile strength and yield strength of the thin plate specimen after laser repairing are slightly higher than those of the forged specimen,while the elongation decreases to a certain extent.When subjected to simulated compression test,the maximum average damage force of the sample after pulse repairing is increased from 2.5 kN to 3.58 kN.

关 键 词：TC1 脉冲激光修复 格栅结构 性能 

分 类 号：TG444[金属学及工艺—焊接]