The distribution law of horizontal cross section area of ring forging and ring blank is put forward to describe the rolling formability of conical ring with inner steps.
对内台阶锥形环件轧制难度进行了分析，提出用环件锻件和轧制毛坯的水平横截面积分布规律来描述内台阶锥形环件的轧制难度。
The rolling experiment with lead as blank material is made in D51-160A hot ring rolling mill and the qualified pre-rolled ring of conical ring with inner steps is rolled.
采用铅环件试样在D51 - 160 A热轧环机上进行轧制实验，轧制出了合格的内台阶锥形环件预轧制环件。
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