Its austenite has two types of morphologies : one type is the austenite which is existing between the acicular ferrite and has approximately equiaxial block shape ; another type is the austenite which is existing inside the acicular ferrite and has thin slice shape 其奥氏体有两种形态：一种是存在于针状铁素体之间的近似于等轴形的块状奥氏体；一种是存在于针状铁素体之内的薄片形奥氏体。
