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线材易切削钢大量用于加工直棒光亮材,用户对产品表面质量有较高要求,尤其是光洁度,是用户判断易切削钢质量好坏的重要指标。麻面坑缺陷是易切削钢的常见缺陷,对于严重的麻面缺陷,用户在拉拔加工后无法完全消除,坑点依然分布在线材表面,属于用户无法接受的缺陷。文章分析了易切削钢线材表面缺陷——麻面产生的主要原因,指出轧制过程中的二次氧化铁皮压入是造成麻面的元凶,分析了合理去除轧制过程产生的二次氧化铁皮方法,尤其是终轧前的氧化铁皮,对保证易切削钢表面质量有着重要的意义。
A large number of wire cutting steel used in the processing of straight stick bright materials, the user of the product surface quality have higher requirements, especially the finish, cutting the quality of the user to judge the quality of an important indicator of quality. Mud pit is a common defect of free cutting steel. For serious puddles, the user can not completely eliminate it after drawing. The pits are still distributed on the surface of the wire, which is unacceptable to users. The article analyzes the main reason of the surface defect of the free-cutting steel wire and the occurrence of the pockmarked surface. It is pointed out that the pressing of the secondary scale in the rolling process is the culprit of the pony surface. The secondary iron oxide scale produced during the rolling process is analyzed reasonably. The method, especially the oxide scale before finishing rolling, is of great significance to ensure the surface quality of free-cutting steel.