采用PandatTM热力学计算软件及钴基数据库,计算研究了500~1500℃温度范围Ti和Ta含量的变化对含Cr钴基高温合金平衡析出相的影响,采用扫描电镜观察了含Ti和含Ta钴基高温合金中的析出相。结果表明:含Ti和Ta的新型钴基高温合金经750℃×100 h时效后,均会析出大量细小的γ’强化相,起到良好的强化效果。随着Ti含量的升高,γ’相和μ相的摩尔分数均增高;随着Ta含量的升高,γ’相的摩尔分数增高。含Ta钴基高温合金的热加工窗口宽于含Ti的钴基高温合金,且前者的凝固偏析倾向性小于后者。 Using PandatTM thermodynamic calculation software and cobalt-based database, the influence of Ti and Ta contents in the temperature range from 500 to 1500 ℃ on the equilibrium precipitation of Cr-containing superalloys was studied. The effects of Ti and Ta-containing cobalt groups Precipitates in superalloys. The results show that after aging at 750 ℃ ​​for 100 h, a large number of fine γ ’strengthening phases are precipitated in the new cobalt base superalloy containing Ti and Ta, which shows a good strengthening effect. With the increase of Ti content, the mole fraction of γ ’phase and μ phase increased. With the increase of Ta content, the mole fraction of γ’ phase increased. The thermal processing window containing Ta-based superalloy is wider than the Ti-containing cobalt-based superalloy, and the former has less tendency of solidification segregation.