提高冷轧超深冲汽车用钢伸长率的工艺研究  

Study on the technology of increasing the elongation of cold rolled extra deep drawing automobile steel

作　　者：徐军 XU Jun(Rizhao Co.,Ltd.,Shandong Iron and Steel Group,Rizhao 276800,China)

机构地区：[1]山东钢铁集团日照有限公司,山东日照276800

出　　处：《轧钢》2021年第5期94-99,共6页Steel Rolling

摘　　要：为更好地满足部分客户对超深冲用钢性能特别是伸长率提升的需求,采用控制图、回归分析、微观分析等方法对0.7 mm厚DC06带钢的断后伸长率进行了分析研究。研究发现,在一定范围内,退火温度、平整机延伸率、钢中S含量对其断后伸长率影响较为显著。通过采取提升退火温度至845~860℃、降低平整机延伸率至0.5%和降低钢中S质量分数至0.01%以下的方法,将DC06带钢断后伸长率提升至43%以上,满足了客户的需求。In order to better meet the needs of some customers for improving the properties especially the elongation of extra deep drawing steel,the elongation after fracture of 0.7 mm thickness DC06 strip was analyzed and studied by means of control chart,regression analysis and microanalysis.It is found that in a certain range,annealing temperature,temper mill elongation and sulfur content in steel have significant effects on the elongation of DC06 strip after fracture.By raising the annealing temperature to 845-860℃,reducing the elongation of temper mill to 0.5%and reducing the mass fraction of sulfur in steel to less than 0.01%,the elongation after fracture of DC06 strip was increased to more than 43%,which met the needs of customers.

关 键 词：超深冲用钢 断后伸长率 退火温度 平整机延伸率 S含量 

分 类 号：U465.11[一般工业技术—材料科学与工程] TG335.12[机械工程—车辆工程]