【摘要】 本文研究了不同W和Co含量的Ni-20Cr基合金的高温稳态蠕变行为。结果表明,W和Co均可提高合金的蠕变激活能Q_c,它服从Q_c=Ae⁽kx/lge的关系.Ni-Cr-Co-W合金的稳态蠕变速率（?）_s也服从（?）_s=Cσ^mexp（-Q_c/RT）的关系。还指出,Ni-Cr-Co-W合金的稳态蠕变速率（?）_s与堆垛层错能γ之间,有（?）_s ∝γ^1.4的关系。更多还原

【Abstract】 The steady state creep behaviour of the Ni-20Cr base alloys with various contents of W and Co has been investigated in the temperature range of 940 to 1040℃. Both W and Co may raise the activation energy for creep, Qo, obeyed the relationship:Q_c=Ae^kx/lg? where x is the atomic fraction of W or Co additions; A is a constant for the alloy composition and k is equal to 7.0 and 0.55 for W and Co additions respectively. The steady state creep rate （?）_s of Ni-Cr-Co-W alloys was predicated to be:（?）_s=Cσ^m exp （-Q_e/RT） where m=6.45±0.10 or 5.3 depending on whether μ phase is present or not. It was also shown that the （?）_s varies with the stacking fault energy γ according to the correlation:（?）_s∞γ^1.4更多还原