通过对罩式炉退火制度进行优化 ,采用优化的辊面凸度曲线 ,在双机平整机上 ,使厚度小于 0 2 5mm镀锡原板的干平整伸长率大于 1 3%。利用退火制度和平整伸长率的合理组合 ,生产优质T4级上限硬度镀锡原板。首先在实验室条件下进行了模拟实验 ,试轧后投入批量生产。结果表明 ,镀锡原板的表面硬度达到HR30T6 3～ 6 5 ,板形良好 ,各项性能要求均满足用户需求。 By optimizing the bell furnace annealing system, the optimal roll crown curve is used to make the dry flat elongation of the original plate with the thickness of less than 0.02 mm is more than 13% on the double plane flattening machine. The use of annealing system and a reasonable combination of flattening elongation, production of high-quality T4-level hardness of the original tin plate. First of all, a simulation experiment was carried out under laboratory conditions and put into mass production after the test and rolling. The results show that the surface hardness of the original tin plate reaches HR30T6 3 ~ 65, the plate shape is good, and the performance requirements meet the needs of users.