【摘要】 本文用极图和矩阵相结合的方法验证了在Ｃｒ２５Ｎｉ２０钢里针状σ相与奥氏体基 体具有：｛００１｝σＩＩ｛１１１｝ｒ，＜１１０＞σＩＩ＜１１２＞ｒ晶体学位向关系．在σ相中发现 了可运动位错的存在。定性分析了不同使用条件下σ用对钢机械性能的影响．更多还原

【Abstract】 The crystallographic orientation relations {001}σ //{111} r, 〈110〉σ //〈112〉r between sigma phase (σ ) and austenite in Cr25Ni20 steel haye been yerified using the combined polar projection diagram with matrix method. The mobile dislocation has been found in sigma phase. The qualitatiye analysis is made to examine the effect of o-phase on its mechanical properties under different seryice conditions of the steel.更多还原