Study On Cooperative Deformation Rolling Process Of Cu/Al Composite Plate Prepared By Vibration Composite Cast-Rolling

Cu/Al composite material not only have high electrical conductivity,thermal conductivity and many other properties,but also can make up for the shortage of copper resources in my country,and are widely used in many fields.Our research group uses the vibration composite casting and rolling technology to prepare a new type of Cu/Al composite.Casting and rolling technology requires that the sheet should not be too thick.In order to obtain copper-aluminum composite plates and strips of different thicknesses,rolling treatment is required.However,in the subsequent rolling of the copper-aluminum clad plate,there are problems such as uncoordinated rolling deformation of each layer of metal and sheet fracture.For such problems,this paper takes the copper-aluminum composite plate prepared by vibration composite casting and rolling as the research object.By means of simulation simulation,experimental verification,analysis and other means,researches are carried out on the cooperative deformation of copper-aluminum clad plates during subsequent rolling.The cold rolling model of copper-aluminum clad plate was constructed,and the variation law of the synergistic deformation of the clad plate was explored.Firstly of all,the interface layer simulation of vibration composite cast-rolled copper-aluminum composite plate is not easy to achieve by conventional finite element simulation.Therefore,the cohesive force model was introduced to simulate the deformation of the interface layer during the subsequent rolling of the copper-aluminum clad plate.Considering the combination characteristics of vibration composite cast-rolled copper-aluminum composite plate,a cold-rolled finite element model of copper-aluminum composite plate was established.Simulation of single-pass rolling and multi-pass simultaneous rolling process of copper-aluminum clad plate.Research on the effect of rolling reduction and rolling speed on the synergistic deformation of copper-aluminum clad plate Analysis of the deformation mechanism of copper-aluminum composite.The relationship between the shear stress near the interface layer and the synergistic deformation of the composite plate was study.Then,conduct single-pass rolling and multi-pass rolling experiments on copper-aluminum clad plates.Compare and analyze with the simulation results,so as to correct the parameters in the model to measure the cracking of the interface layer of the copper-aluminum clad plate.Accurate parameter values for measuring the cracking of copper-aluminum clad plates are determined to ensure that the model is consistent with the reality.Finally,the cooperative deformation behavior of the copper-aluminum clad plate is studied by the asynchronous rolling method through numerical analysis.The influence of asynchronous speed ratio and reduction on the synergistic deformation of the composite plate was explored,and the change law of the synergistic deformation of the copper-aluminum composite plate was further analyzed.The deformation mechanism of the composite plate and the effect of shear stress near the interface layer on the cooperative deformation of the copper-aluminum composite plate were also studied.The different cooperative deformation laws of copper-aluminum clad plates under synchronous rolling and asynchronous rolling are compared and analyzed.