It is found that the stock corners tend to sharp unavoidably in grooveless rolling.The degree of sharpened corner has relations with draft ratio and the ratio of height to width of pre-rolled stock.

• 结果表明，无孔型轧制时轧件的角部将不可避免地趋于尖化，尖化程度与压下率及轧前轧件高宽比等因素有关；