摩擦对430不锈钢板材热轧过程边部线状缺陷的影响  

Influence of friction on edge seam defect for 430 stainless steel plate during hot rolling process

作　　者：曾华旭 张立文[1] 张驰[1] 薛莉 Zeng Huaxu;Zhang Liwen;Zhang Chi;Xue Li(School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学材料科学与工程学院,辽宁大连116024

出　　处：《锻压技术》2024年第4期189-193,共5页Forging & Stamping Technology

基　　金：辽宁省自然科学基金资助项目(2019KF0506)。

摘　　要：为了改善热轧板材的表面质量,通过有限元软件MSC.Marc,建立了一个4道次的往复轧制模型以模拟430不锈钢板材热轧过程中的侧翻现象,分析了摩擦因数对于侧翻过程的影响。研究结果表明,只有当板材的压下量达到一定程度时侧翻才会发生,且随着轧制过程的不断进行,板材的侧翻程度增加。当摩擦因数降低时,侧翻的程度也随之减轻,直至摩擦因数为0.2时,侧翻不会发生。由此可见,对板坯的表面进行润滑可以有效减小由边部线状缺陷造成的切边损失。此外,通过分析板材在宽度方向的位移分布发现,摩擦之所以能够影响侧翻过程是由于不同的摩擦力导致了接触面上的金属和侧面的金属沿着宽度方向的流动速度不同,进而间接影响侧翻。In order to improve the surface quality of hot-rolled plates,a four-pass reciprocating rolling model was developed by finite element software MSC.Marc to simulate the side turn phenomenon in the hot rolling process of 430 stainless steel plate,and the influence of friction factor on the side turn process was analyzed.The research results show that the side turn occurs only when the reduction amount of plate reaches a certain degree,and the degree of side turn for plate increases with the continuous rolling process.When the friction factor decreases,the degree of side turn decreases,until the friction factor is less than 0.2,the side turn does not occur.It can be seen that lubricating the surface of slab can effectively reduce the trimming loss caused by edge seam defects.In addition,by analyzing the displacement distribution of plate along the width direction,it is found that the reason why the friction can affect the side turn process is that different friction forces result in the difference of flow velocity between the metal on the surface and the metal on the side along the width direction,which indirectly affects the side turn.

关 键 词：430不锈钢 热轧 摩擦 边部线状缺陷 金属流动 侧翻 

分 类 号：TG142.1[一般工业技术—材料科学与工程]