Effect of Surface Roughness on Interface Quality of Hot Rolled Stainless Steel Clad Plate
JIN Herong1,2, ZHANG Zhaorui3, HAN Minfeng3, JING Shitao3, ZHAO Dingxuan3
1 Key Laboratory of Advanced Forging and Stamping Technology and Science of Ministry of National Education, Yanshan University, Qinhuangdao 066004, China 2 Parallel Robot and Mechatronic System Laboratory of Hebei Province, Yanshan University, Qinhuangdao 066004, China 3 School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China
Abstract: In order to study the influence of slab surface roughness on the interface quality of stainless steel clad plate, a 3D thermal-force-coupled finite element model for hot rolling forming of non-co-nodes of stainless steel composite plates was established based on MSC.Marc software. The effect of friction coefficient between bimetals on the interface adhesion characteristics of the rolling deformation zone of composite plates were studied. At the same time, hot rolling tests and performance evaluation tests of slabs with different surface roughness were carried out. The results show that when the friction coefficient between bimetals increases, the earlier the bimetal bonding occurs in the rolling deformation zone. The larger surface roughness of slab inhibits the diffusion of carbon elements at the interface, but it is also more likely to cause the formation of interfacial compounds and holes. The results of tension shear test show that the shear strength of clad plate with Ra=7.6 μm is the highest, reaching 384.81 MPa, and that of clad plate with Ra=1.6 μm is 365.85 MPa. Both samples of tension-shear are ductile fracture. For the clad plate with Ra=15.6 μm, due to the hole defects in the interface, brittle fracture occurs, with the lowest tensile-shear strength of 321.74 MPa.
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2021, Vol. 35 
