电焊机2025，Vol.55Issue(2)：70-76,7.DOI:10.7512/j.issn.1001-2303.2025.02.07
扫描路径对热丝激光修复K4169镍基高温合金显微组织的影响
Effect of Scanning Path on Microorganization of Hot Wire Laser Repair K4169 Nickel-based Superalloy
摘要
Abstract
The effects of discontinuous longitudinal and continuous transverse scanning paths on the microstructure of K4169 nickel-based superalloy repaired by hot wire laser were investigated by means of metallographic,XRD,SEM and EBSD.The results show that:(1)The microstructure of the repair zone under the two scanning paths is dominated by co-lumnar dendrites and a small amount of equiaxed crystals,but the crystal size at each position of the repair zone under the discontinuous longitudinal scanning path is small.(2)The phase composition is γ-Ni matrix phase and the harmful phase Laves phase is precipitated,but the size of Laves phase is small and the content is small under the discontinuous longitudinal scanning path.(3)The secondary dendrite spacing and the average grain size are smaller under the discontinuous longitudi-nal scanning path,but the content of small angle grain boundaries in the repair zone is higher under this scanning path,which will cause poor plasticity and toughness of the material.关键词
扫描路径/晶粒尺寸/二次枝晶间距/晶界角度/Laves相Key words
Scanning path/grain size/the secondary dendrite spacing/grain boundary angle/laves phase分类
金属材料引用本文复制引用
康国荣,石玗,李春凯,顾玉芬..扫描路径对热丝激光修复K4169镍基高温合金显微组织的影响[J].电焊机,2025,55(2):70-76,7.基金项目
国家自然科学基金(52365048) （52365048）
甘肃省科技重大专项(22ZD6GA008) （22ZD6GA008）
