Research On The Deformation And Thermodynamic Behavior Of Clad Metal During Solid-Liquid Cast-Rolling Bonding Bimetallic Clad Metal

Bimetallic clad pipes and wires are structural and functional materials,which combines the advantages of two materials and is widely used in machinery,construction,chemical,aerospace and other fields.Solid-liquid casting and rolling is a short process,green,environmentally friendly,and efficient production process,which is used in the production of plates.On this basis,the bimetallic clad pipe and bimetallic clad wire were prepared by solid-liquid casting and rolling by setting a pass on the roll surface and designing a special flow distribution device.However,the research on the deformation behavior of the cladding metal,especially the control of the cross-section shape,needs to be further studied.In this paper,the solid-liquid casting and rolling process and equipment of copper-clad wire were studied as follows.Firstly,the cast rolling properties of H68 brass were analyzed,and the microstructure evolution and mechanical properties of cast rolled brass strip were studied by twin roll casting experiment and numerical simulation.The results show that the casting and rolling process parameters mainly affect the solidification structure of brass strip by affecting the height of kiss point.By increasing the nucleation parameters,the constraint relationship between the solidification structure of brass strip and the reduction can be broken,and the microstructure refinement and mechanical properties of brass strip can be realized,which provides guidance for ensuring the properties of coating materials.Based on ProCAST numerical simulation software,the coupled thermal microstructure simulation model of solid-liquid casting rolling process of brass coated pure copper wire was established,and the influence of process parameters on temperature field and temperature near composite interface was analyzed,The relationship between kiss point height and process parameters is given,and the solidification structure distribution of cladding metal in casting rolling zone is obtained.At the same time,brass coated pure copper strand was prepared by solid-liquid casting rolling experiment,which verified the feasibility of solid-liquid casting rolling of brass coated pure copper strand.A non-circular groove solid-liquid roll casting process was proposed for bimetallic materials with special cross-section.The influence of the pass design parameters on the cross-section shape of the non-circular groove solid-liquid roll casting composite line is analyzed by numerical simulation.On this basis,the cross-section shape prediction model is established,and the cross-section shape prediction program of the non-circular groove solid-liquid roll casting composite line is developed.The feasibility of non-circular groove solid-liquid roll casting process and the accuracy of cross-section shape prediction model were verified.