Abstract: The structure of enameling water tank is upgraded from three-segment type to two-segment type. The manufacturing process of water tank is changed from sheet curling and stamping craft to the sheet deep drawing craft. Because of the structure change of water tank, there are much more requirements on enameling property and formability for steel sheet. Baosteel industrial data and Design of Experiments ( DOE) method are used to establish the steel designing and optimizing model, and the special deep drawing hot-rolled steel for enameling water tank is developed successfully. It has been proved by large industrial production that, the reject ratio of deep drawing parts can be controlled down the level of 0. 4% , at the same time, the enameling property is excellent.

摘要： 热水器搪瓷内胆结构由三段式升级为二段式,内胆毛坯的成形方式由卷圆成形+冲压成形方式转变成深拉成形方式,相应的钢板也必须满足深拉成形要求。由于搪瓷内胆结构的变化,对钢板提出了更高的要求,在保障涂搪性能的基础上还需更好的深拉性能。宝钢运用钢厂工业数据与试验设计(DOE)工具,建立钢种设计优化模型,开发出了深拉型搪瓷内胆专用热轧钢板。经工业大生产验证,深拉件报废比例可以控制在千分之四以内,涂搪性能优良。

关键词: 搪瓷内胆, 深拉成形, 热轧钢带, DOE(试验设计)