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本文首先讨论了Co对Ni-Cr-Co基合金的强化作用。指出,合金中加入钴主要是由于降低了合金堆垛层错能,(0％Co;20％Co合金分别为72.7;36.3erg/cm~2)拉宽了扩展位错的宽度,使位错攀移和交叉滑移在晶体中更难进行而强化了合金。其次讨论了W、Mo对合金的强化作用。指出,W、Mo综合强化不如以W单独强化的较果更好。因为,即使含有少量Mo也易析出尺寸较大的含Mo的μ相,使合金的室温塑性大幅度下降。W可提高合金的蠕变激活能(W含量为16％;18％;20％蠕变激活能分别为78.11;92.33;120.44kcal/mol,降低合金的稳态蠕变速率。W也可以降低合金的堆垛层错能。
This paper first discusses the strengthening effect of Co on Ni-Cr-Co-based alloys. It is pointed out that the addition of cobalt to the alloy is mainly due to the reduction of the stacking fault energy of the alloy (0% Co; 20% Co alloy respectively 72.7; 36.3 erg / cm ~ 2) widening the width of the extended dislocation, Climbing and cross-slip are harder in the crystal and strengthen the alloy. Secondly, we discussed the strengthening effect of W and Mo on the alloy. Pointed out that, W, Mo overall strengthening is better than W alone to enhance fruit. Because, even with a small amount of Mo is also easy to precipitate a larger Mo-containing μ phase, so that the plastic room temperature plastic greatly reduced. W can increase the creep activation energy (W content is 16%; 18%; 20% creep activation energy is 78.11; 92.33; 120.44kcal / mol, reduce the steady creep rate of the alloy.W can also reduce the alloy Stacking faults.