Rolling Composite .cu/dt9/cu Laminated Materials And Numerical Simulation

Layered composite materials are more and more extensively applied in military equipments of national defense science and technology with the development of technology, so the study of layered composite materials has become much more in-depth. For the laminated composite of copper and iron, no domestic report has been found. Oxygen-free copper TU1 and iron DT9 are selected to make the composite material in this research. The numerical simulation as well as the experimental study of hot rolling compound is carried out for the first time to the copper/ steel/copper in domestic, it has obvious innovation significance for research and application of compound materials.First, the high temperature mechanic performance of oxygen-free copper TU1 and iron DT9 are tested, and the rolling process for the compound of copper and iron is established. Second, hot rolling experiment is conducted and take analysis of the performance of composite materials and thickness change, and also the combination mechanism of the composite. Third, based on high-performance computing platform, using finite element software ABAQUS for the first time to simulate the hot rolling process of copper and iron with the reduction of 50%. It can provide a theoretical and practical basis for optimization of the hot rolling process of the composite materials. The main conclusions of this paper are:(1) The hot rolling process of the compound of copper and iron is established, the temperature is about 850℃and the reduction is more than and equal 50%. After the hot rolling experiments of three different thicknesses of copper/iron/copper and get the laminated composites well bonded. The bond strength of composite materials is 155MPa, the yield stress of the composite is about 170MPa, and tensile strength is about 250MPa after annealing.(2) Experimental analyzed of the thickness change of the hot rolling and cold rolling that the reduction of copper layer is consistent with iron layer. By measuring the thicknesses of the final composite material show that after rolling the original Cu/DT9/Cu which thickness is 1.5/2/1.5 can meet the thickness requirements of production.(3) By analyzing the bonded interface, the combination mechanism of Cu/DT9/Cu can be summarized as:The surface layer of the copper and iron are broken to form a real physical contact when hot rolling, in the conditions of high temperature and pressure surface atoms are activated, so that metallic bonds are produced to achieve combination.(4)Based on high-performance computing platform, using AB AQUS software for the first time to simulate the compound of copper and iron with three different thicknesses of the copper/iron/copper. The results show the temperature,stress and strain distribution and get the maximum average rolling pressure of rolling process is about 41.6MPa;The numerical simulation results compared with experimental data of the thickness ratio which is the copper to the iron after hot rolling, the error is less than 7%. It can provide well prediction of layer thickness.