Research On Hot Deformation Behavior Of Double Metal Composite Plate

Bimetallic composite plate is composed of two kinds of metal which are designed rationally.Combining the advantages of the two components,the performance and economy of bimetallic composite plate has a significant advantage than that of ordinary metal plate.In this paper,the Q235B-304 and Q345R-N02201 composite plates are selected as the research object,and the thermal deformation behavior of the two composite plates is studied and analyzed by means of finite element simulation and experiment.Thermal compression tests were carried out on two composite plates with different thicknesses ratios by Gleeble-3500 thermal simulator.The ratio of the base layer deformation and the deformation of the clad layer is the deformation coordination ratio.The closer the deformation coordination ratio is to the "1",the smaller the difference between the base layer and the clading layer.The results show that with the increase of the total deformation,the deformation coordination ratio of two kinds of composite plate samples is close to 1.For the Q235B-304 composite plate,when the deformation temperature increases from 1000? to 1100?,the thickness of the 1:1,1:3 sample deformation coordination ratio approaches 1.The effect of deformation temperature on the deformation coordination ratio of Q345R-N02201 specimen is not obvious.ABAQUS software was used to simulate the hot rolling process of two composite plates.When the deformation temperature increased from 1000? to 1100? or the proportion of carbon steel layer thickness increased,the equivalent strain zone of Q235B-304 composite plate gradually extended from carbon steel layer to the stainless steel layer.For the Q345R-N02001 composite plates,the equivalent strain value of the composite layer increases with the increase of the thickness ratio of the base layer.The hot rolling experiments of the two kinds of composite plates with the reduction of 30% and the deformation temperature of 1100? were carried out.It was found that the ABAQUS software could simulate the hot rolling process of the composite plate.After rolling,the microstructure of carbon steel layer of Q235B-304 composite plate is recrystallized and the grain refinement is obvious.As for Q345R-N02001 composite plate,the microstructure of the carbon steel layer changed from original bainite to ferrite + pearlite,and the microstructure of the pure nickel layer recrystallized and the grain size decreased obviously.The deformation behavior and the coordination between the base layer and the cladding layer of the two composite plates under the conditions of hot compression and hot rolling are mastered by the above research work,and a clear understanding of the microstructure changes after rolling of the two kinds of composite plates was obtained.This provided experimental basis and theoretical basis for the development of hot working process of composite plate.