在Ni-15Co-10Cr-5.5W-5.5Mo-4Al-2.5Ti变形高温合金中加入微量镁,能明显改善合金的中温和高温性能。但对镁的含量非常敏感;在此合金中,最佳镁含量为0.007wt％。只有在达到最佳值时,性能才能明显改善,稍过量,即可明显变坏。本工作以高空间分辨率分析电子显微术及晶格象作手段,对几种不同镁含量的此合金中 In the Ni-15Co-10Cr-5.5W-5.5Mo-4Al-2.5Ti deformation superalloy adding a small amount of magnesium, can significantly improve the alloy’s temperature and high temperature performance. But very sensitive to the magnesium content; in this alloy, the optimum magnesium content is 0.007 wt%. Only when the best value is achieved can the performance be significantly improved, a little over, you can significantly deteriorate. This work with high spatial resolution analysis of electron microscopy and lattice image as a means of several different magnesium content of this alloy