Treated by optimum technology stated in this paper,the uniform and fine equiaxed crystals were obtained,and the difference between the axial and radial microyield strengths was almost diminished.

• 着重研究了微变形消除各向异性工艺,通过形变热处理获得了均匀细小的等轴晶组织,使轴向和径向的微屈服强度趋于一致,达到了微变形行为的各向同性。