以火力发电机高温部件用Ni-Fe基高温合金为研究对象,通过计算机模拟和实际测量得到Ni-Fe基高温合金的焊接热循环曲线,研究了Ni-Fe基高温合金的焊接组织和力学性能。结果表明,Ni-Fe基高温合金经焊接热循环后,其γ’相组织数量减少,导致其力学性能相对于母材明显降低,在室温和高温下拉伸断口形貌均具有穿晶断裂特征。 Taking Ni-Fe-based superalloy as the research object, the welding thermal cycle of Ni-Fe-based superalloy was obtained by computer simulation and actual measurement. The welding microstructure and mechanical properties of Ni-Fe-based superalloy . The results show that the number of γ ’phase of Ni-Fe-based superalloy decreases after welding thermal cycle, resulting in a significant decrease of its mechanical properties relative to that of base metal. The tensile fracture morphology at room temperature and elevated temperature has transgranular fracture characteristics .