Simulation And Experimental Study On Hot-Compress Deform 3D Of Aluminum Bronze

Aluminum bronze is very popular at present due to its excellent mechanical properties,good corrosion resistance,high castability,not easy to be destroyed,good thermal conductivity and good luster.Aluminum bronze is widely used in mechanical industry.Although the hardness and strength of aluminum bronze are very good,but in the processing process because of the elastic problem is easy to produce micro cracks,and the fracture is brittle fracture.In this paper,aluminum bronze alloy(QAl10-4-4)material as the research object.The true stress-strain curve,constitutive equation and the range of compression temperature and rate of the best process parameters were obtained by using Gleeble 3500 thermal simulation test machine.Furthermore,the dynamic material model(DMM)was used as the theoretical basis to systematically study the thermal deformation characteristics of al-bronze alloy,and the range of machinable temperature and strain rate and the optimal deformation parameters were determined during the high-temperature plastic deformation of al-bronze alloy,that is,the instability region and the stability region were obtained.After that,Deform3 D simulation software was used to conduct numerical simulation research on the machining diagram of aluminum bronze alloy hot forming process,and the process parameters of the instability region and the stability region in the machining diagram were simulated respectively.After comparing with the test of the processing figure,found the processing figure in the stable area and the simulation of the stable area is roughly same,processing the instability in the graph area and the simulation of the instability region from the parameters such as stress,strain,load is also acceptable error,so as to verify the effectiveness of the process diagram.From the point of view of the final compression morphology of the specimen,there is a significant difference between the hot compression testing machine and the simulation.The specimens in the instability area in the processing diagram are shown as cracks,while the specimens in the instability area in the simulation are shown as melting and attached to the convex and concave dies.