热轧酸洗板腰折缺陷产生机理及预防措施  

Generation Mechanism of Waist Folding Defect of Hot Rolling Pickling Sheet and Its Precautionary Measures

作　　者：刘友荣[1] 王进[1] 裴新华[1] 韩乃川[1] 穆海玲[1] 

机构地区：[1]上海梅山钢铁股份有限公司技术中心,江苏南京210039

出　　处：《轧钢》2012年第6期29-31,39,共4页Steel Rolling

摘　　要：梅钢100万t热轧酸洗线在调试过程中发现产品表面存在横跨钢带表面并与轧制方向垂直的腰折缺陷,为此,研究了开卷过程中带钢的受力情况,分析了腰折缺陷的产生机理和影响因素,认为开卷过程中钢卷应力分布不均和钢铁材料自身屈服平台的存在是产生腰折缺陷的根本原因。因此,制定了合理的防折辊和拉矫工艺控制参数,严格控制来料带钢质量,有效降低了腰折缺陷的发生率。Waist folding defect which was across the strip surface and vertical with rolling direction was ap- peared during try production of 100 × 104 t hot roiling pickling line of Shanghai Meishan Iron ＆ Steel Co. , Ltd. The force condition of strip during de-coiling was studied, the generation mechanism and influence factors of waist folding defect were analyzed. The results show that the prime factors to cause waist folding defect were uneven stress distribution along with the strip during de-coiling and self- property of steel material exist- ence flatness of yield point elongation. Therefore, reasonable parameters of guard against folding roller and pul- ling-straightening technology were designed, and the quality of supplied materials was strictly controlled. By these measures, the waist folding defect was obviously reduced .

关 键 词：热轧酸洗钢板(带) 腰折 防折(深弯)辊 张力 拉矫 屈服平台 延伸率 

分 类 号：TG335.5[金属学及工艺—金属压力加工]