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上钢五厂九车间生产冷拉棒钢,滚珠轴承钢户量约占总产量的三分之一。历年来滚珠轴承钢的表面脱碳是生产中的老大难问题。常因脱碳不合格而改规格,甚至发生用户退货事件,损失很大。酸洗 QC 小组成立后,根据国外资料关于“钢材浸磁酸后热处理,可以防止表面脱碳”的报导,采用正交试验法,摸索出符合车间生产条件的浸酸工艺。规定硫酸浓度控制在
On the steel plant Wuchang nine workshop production of cold-drawn steel, ball bearing steel accounts for about one-third of the total output. Over the years the surface of ball bearing steel decarburization is a chronic problem in production. Often due to decarburization failed to change the specifications, and even the user return event, a great loss. After the establishment of the pickling QC group, according to the foreign materials on the “heat treatment of steel after immersion acid, can prevent the surface decarburization,” the report, the use of orthogonal test method, to find out the production line with the pickling process. Sulfuric acid concentration control at