Research On FEM Simulation Of Extrusion Process Of FGH96 Power Metallurgy Superalloy Tube

With the development of modern aero-engine and kinds of gas turbine it demands more for the material property.As normal alloy can not meet all the operating requirements high temperature alloy emerge as the times require.Because of the advantages of powder metallurgy super alloy like well-closed formation,fined grain,a high level of alloying,high yield strength,good property of anti-fatigue creep,showing that powder compactions have gained excellent mechanical property and thermal process performance,resulting in a decline of the weight of engines and cost,it is widely used in the production of advanced aero-engines.As the second generation nickel-based high temperature alloy,FGH96 has excellent creep strength,resistance to propagation of hot cracks and damage tolerance,etc.As a new kind of alloy with excellent properties,the squeeze process of FGH96 is still in the blank stage.The subject is based on the three-dimensional finite element software Qform-3D,numerical modeling the whole process of hot extrusion forming of seamless steel pipes.All the influences of technological parameters have to the extrusion during the procedure are analyzed.In the modeling of the first three processes,the stress,strain field,temperature field and loading is analyzed.Based on all this,extrusion is emphasized to simulation analyzed.The changing rules of temperature field,radial velocity and effective stress of different stages during the extrusion process are analyzed.Meanwhile,single factor method is used to analyzed how technological parameters like the die angle of female die,friction factor,extruding temperature and extruding velocity affect the procedure of extrusion forming.The changing laws of main aspects like extrusion load,temperature,effective stress,strain and die wear under the different parameters have been got to acquire the best technological parameters.At last,compare the results gained from modeling analysis and the ones gained from experimental study.They coincide with each other certifying the correctness of the results.By the numerical modeling through the whole procedure,theoretical analysis combined with experimental verification,the experiment offer extrusion process good theoretical direction and technical support.At the same time,the technology improves the quality of hot extrusion,stock utilization and production efficiency,shortens the development period of new product,reduces the workload of engineering technicians,reducing the cost of production.Thus it provides other practical production applications of extrusion of similar products with theoretical foundation and technical reference,possessing some theoretical values and real meanings.