摘要介绍了获得满足△ｇ平行法则的位向关系、惯习面、正空间和倒空间准不变应变线的计算方法，解释了高锰钢中先共析魏氏组织渗碳体在奥氏体晶内析出时的Ｐｉｔｓｃｈ和Ｔ－Ｈ位向关系，计算得到的位向关系和惯习面结果与实验结果吻合得很好，根据计算结果，将惯习面分解成原子级的台阶，绘制了 Ｐｉｔｓｃｈ和 Ｔ—Ｈ位向关系惯习面上的晶格匹配示意图 Abstract This paper introduces a method to obtain the orientation relation, the habit plane, the positive space and the quasi invariant strain line that satisfies the △ g parallel rule. It is explained that in the high manganese steel, The relationship between the orientation of Pitsch and T-H in the bulk crystal is in good agreement with the calculated results. The calculated results show good agreement with the experimental results. According to the calculation results, the habit plane is decomposed into atomic steps and drawn The Pitsch and T-H bits are used to map lattice matching on the habitus surface