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徐庆东,王述刚,乐国敏,杨磊,莫文林,蒋驰,魏怡芸,张鹏程.激光成形修复Inconel 625合金的工艺特性和组织研究[J].稀有金属材料与工程(英文),2019,48(5):1598~1604.[Xu Qingdong,Wang Shugang,Le Guomin,Yang Lei,Mou Wenlin,Jiang Chi,Wei Yiyun and Zhang Pengcheng.Process Parameters and Microstructure of Laser Forming Repaired Inconel 625 Alloy[J].Rare Metal Materials and Engineering,2019,48(5):1598~1604.]
Process Parameters and Microstructure of Laser Forming Repaired Inconel 625 Alloy
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Received:November 30, 2017  Revised:January 07, 2018
DOI:
Key words: Laser Forming Repairing  Inconel 625  Process Parameters  Microstructure
Foundation item:国家自然科学基金资助(项目号 51401189);材料所所长基金资助(项目号SJYB201513)
Author NameAffiliation
Xu Qingdong,Wang Shugang,Le Guomin,Yang Lei,Mou Wenlin,Jiang Chi,Wei Yiyun and Zhang Pengcheng  
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Abstract:
      The process parameters and microstructure of the laser forming repaired (LFR) samples of Inconel 625 alloy are investigated. The results show that a wide range of process parameters are suitable for the laser forming repairing of Inconel 625 alloy. The laser power mainly affects the width of single track LFR samples. The scanning velocity has significant effect on the size of single track LFR samples. The powder feeding rate has less effect on the size of single track LFR samples. The interface between the substrate and laser repaired zone (LRZ) shows a metallurgical bonding. The phases in substrate mainly consist of the γ(Ni-Cr) matrix, MC (NbC, TiC) carbids with bimodal sizes of about 10μm and 0.5μm, and laves phase. In the LRZ, columnar dendrites grow epitaxially from the substrate, approx following the deposition direction. The phases in LRZ mainly consist of γ matrix, laves phase and a small amount of MC carbids. Due to the increase of nucleation sites, a large ammount of laves phase are precipitated in the layer interface and track interface.