Stainless Steel / Carbon Steel Hot-rolled And Cold-rolled Simulation Study

Based on three layers stainless steel/carbon steel/stainless steel compositeplate in the deformation is not easy to appear in the process of rolling interfacecoordination and interface stress is high, the interface is not smooth, quicktemperature drop, etc., based on the thermal-mechanical coupling algorithm,using the finite element software Marc three-dimensional elastic finite elementmodel is established. According to actual working condition of rolling compositefor simplified boundary conditions and loading is simulated by three layercomposite panels under high temperature (1200℃), in the process of rolling rateunder different speed, different pressure, the influence on temperature field, stressfield distribution, as well as the interfacial residual stress are analyzed. At thesame time of composite panels to simulate cold rolling and cold rollingexperiment on the second floor, after annealing, the mechanical properties of thecomposite board, and the interface state of organization characteristics andcomposition are analyzed. Specific research contents and results are as follows：(1) In the process of rolling, roll speed faster, composite board surfacetemperature, the higher the roller speed0.5m/s, the lowest temperature of937℃,interface temperature2.3℃, roller speed of2m/s, the stainless steel surfacetemperature is1150℃, interface temperature5.35℃. Rate of20%under thepressure, the stainless steel surface temperature to1020℃, interface temperature1.97℃,30%down, stainless steel surface temperature to960℃, interfacetemperature4.6℃. In the process of rolling, the maximum stress value appearedin the rolling process of stainless steel surface layer and the composite interface.(2) Using MARC finite element method, complete the three layers ofcomposite panels on rolling residual stress are analyzed, and after applyingdifferent conditions, analysis of the clad plate after rolling residual stress changes.The results show that：After bending stress reduction unit compared with onlytwo roller rolling, interface of residual stress value is more obvious. Speedenhancement, the residual stress of composite board eventually reduce is more obvious. Bending stress reduction unit roller spacing increased from120mm to170mm, the stress significantly decreased to the minimum. In factoid-mad beforeand after several groups, the current tension of20MPa, tension after3MPa,composite board overall value of the minimum residual stress. And to determine aminimal residual stress in rolling plan.(3) Two-high cold rolling model is established, the second floor platedeformation law are analyzed.(3) Two-high cold rolling model is established, thesecond floor plate deformation law are analyzed. After bending of compositepanels, bend without fault, bending performance is good.(4)Metallographic observation found that carbon steel test organization forpearlite and ferrite, along with the increase of the pressure rate near the area on thesurface of the composite ferrite decrease obviously. By scanning electronmicroscopy (sem) examination stainless steel side close to the complex surface,reduce iron content, Cr element content increased. And tensile fracture beingbrittle fracture.