以晶粒大小、晶粒形状比以及气泡尺寸的作用,研究了再结晶AKS掺杂钨丝在3000～3500K,应力小于10~(-4)·G的高温蠕变性能。除通过控制晶粒参数来证明气泡对抗蠕变的间接作用外,电子显微镜观察结果表明:掺杂钨丝的蠕变强度可以通过取决临界气泡尺寸的位错与气泡相互强化作用来测定。临界气泡的尺寸与实验所观察到的高的活化能及最小蠕变速度的低应力是一致的。 The effects of grain size, grain shape ratio and bubble size on the creep properties of recrystallized AKS-doped tungsten wire at 3000 ~ 3500K and stress less than 10 ~ (-4) · G were studied. In addition to controlling the indirect effect of bubbles on the creep resistance by controlling the grain parameters, the electron microscopic observations show that the creep strength of the doped tungsten wire can be determined by the interaction of dislocations and bubbles depending on the critical bubble size. The critical bubble size is consistent with the experimentally observed high activation energy and low stress of minimum creep velocity.