近年，用户对中直径无缝钢管内表面的质量要求日益严格，如锅炉管、涂层的管线钢管等，用传统的自动轧管工艺进行生产难以适应用户的质量要求。最近，日本川崎钢铁公司知多厂对在自动轧管生产过程中缺陷的产生及为减轻缺陷而对钢管内表面进行除鳞的效果作了调查，结果如下：① In recent years, users are increasingly demanding on the quality of medium-diameter seamless steel pipe inner surface, such as boiler tubes, coated pipe steel pipe, etc., with the traditional automatic rolling process is difficult to meet the quality requirements of users. Recently, Kawasaki Steel Co., Ltd. Kodama plant in Japan on the automatic tube rolling defects in the production process and to reduce defects on the surface of the steel tube to carry out the effect of descaling were investigated, the results are as follows: ①