【摘要】 论述了金属学基本理论中关于六方系晶向指数确定方法，位错理论中的６个方向问题，奥氏体化过程中的成分变化问题，提出了作者的独特见解，并对金属学教材中错误的或不明确的地方进行了说明更多还原

【Abstract】 The paper mainly discusses such problems as the way of determination of Miller-Bravais index of hexagonal lattice structure,six directions in the dislocation theory and the changes of components in austenization of eutectiod steel.The paper also puts forward a unique point of view on the details of the relevant theories and presents explanations of the textbook of physical metallurgy on its faults and uncertainties.更多还原