| Inertia friction welding is an advanced process technique, which has some characteristics, such as high quality, precision, high efficiency, economizing on energy. Researchers and technicians attach importance to this technique gradually. Especially, in the manufacture of high thrust-weight ratio aeroengine integer turbine rotor part, it has become a necessary process method.The physics performance of super alloy GH4169, especially, friction performance is researched in the thesis. The change disciplinarian of GH4169 friction coefficient along with temperature, press and friction velocity change is produced. This disciplinarian is accorded with friction welding process practical situation. At the present time, high temperature physics performance data are not enough. In this research, these are gained with cubic interpolation calculation, by large-scale engineering calculation software MATLAB.Three dimension elastic-plasticity finite element calculation model is established, by the measures of calorifics-mechanics coupling finite element. The geometry non linearity, material non linearity and friction coefficient change are added to the model. The large scale high performance parallel calculation computer and large scale engineering finite element analysis software ANSYS8.0/Multiphysical(parallel calculation edition) are used. The calculation programme gets the analysis result with material performance parameters and welding process parameters, immediately.The temperature field, strain field and stress field of welding workpiece in different time are analyzed, making use of simulation calculation result. The change disciplinarian and mutual action of these physics fields is gained. The relation of simulation result and certain welding process disfigurements is established. The process optimizing is suggested.
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