GH4169薄壁零件表面损伤的激光沉积修复试验研究

Experimental Study on Laser Deposition Repair of Surface Damage of GH4169 Thin-Walled Components

研究了不同基体厚度和扫描方式对激光沉积修复(LDR)GH4169合金修复件的残余应力、微观组织及拉伸性能的影响。结果表明,基体厚度越小,即修复体厚度越大,残余应力和枝晶间析出的Laves相体积分数就越大,室温抗拉强度和断后伸长率则越小。试验表明,短边扫描有利于提高激光沉积修复GH4169合金的室温拉伸性能。

The effects of substrate thickness and scanning mode on the residual stress, microstructure, and tensile property of GH4169 alloy components after laser deposition repair （LDR） are investigated. The results show that the smaller the substrate thickness or the larger the deposition thickness is,the larger both the residual stress and the volume fraction of the interdendritic Laves phase are, in contrast, the smaller both the tensile strength and the percentage elongation after fracture at room temperature are. The experiment indicates that the short edge scanning mode is beneficial to improving the tensile property at room temperature of GH4169 alloy after LDR.