平整机组伸长率窜高形成机理及其控制技术  

Formation mechanism and control technology of elongation beating of levelling unit

作　　者：徐烨明[1] 张青树[1] 白振华 XU Ye-ming;ZHANG Qing-shu;BAI Zhen-hua(Cold Rolling Mill,Shanghai Meishan Iron and Steel Co,Ltd.,Nanjing 210000,Jiangsu,China;Yanshan University of National Engineering Research Center for Equipment and Technology of Cold Strip Rolling,Qinhuangdao 066004,Hebei,China)

机构地区：[1]上海梅山钢铁股份有限公司冷轧厂,江苏南京210000 [2]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004

出　　处：《中国冶金》2020年第10期41-48,共8页China Metallurgy

基　　金：河北省自然科学基金资助项目(E2016203385);重型机械协同创新计划课题资助项目(ZX01-20140400-05)。

摘　　要：双机架平整机组在生产过程中,伸长率不稳定甚至出现窜动,不但直接影响成品带钢的机械性能,而且会降低轧制过程的稳定性,甚至会导致断带与堆钢,已经成为困扰平整轧制的一大瓶颈问题。为此,以某1420 mm双机架平整机组为研究对象,在介绍了伸长率窜动的具体表现形式,详细分析了轧制压力、张力以及轧制速度等影响伸长率窜动的可能因素的基础上,从实际轧制工况入手锁定导致伸长率窜动的主要因素,研究产生窜动的成因与机理,提出相应的治理措施,并将其应用到生产实践,取得了良好的使用效果,因平整工序而造成的伸长率波动超过20%的情况从技术应用前的15%下降到0.215%,基本杜绝了因伸长率窜动而引起的断带问题。In the production process, the double stand levelling unit has unstable elongation and even turbulence, which not only directly affects the mechanical properties of the finished strip, but also reduces the stability of the rolling process, and may even lead to the problem of broken strips and stacking steel, so it has become a major bottleneck problem that plagues levelling rolling. Therefore, a 1 420 mm double stand levelling unit is taken as the research object. Based on the specific expressions of the elongation rate, and the detailed analysis of the possible factors affecting the elongation beating such as rolling pressure, tension and rolling speed, the main factors causinge the elongation beating are locked from the actual rolling conditions, the causes and mechanisms of the beating are studied, and the corresponding treatment measures are put forward, which have been applied to the production practice and achieved good results. The elongation beating of more than 20% due to the leveling process has dropped from 15% before the technology application to 0.215%, which basically eliminates the problem of the strip breakage caused by the elongation beating.

关 键 词：伸长率 窜动 平整轧制 影响因素 成因与机理 治理措施 

分 类 号：TG333.4[金属学及工艺—金属压力加工]