He YANG
,
Yuli LIU
,
Wang CAI
,
Mei ZHAN
材料科学技术（英文）
Blade precision forging is a high temperature and large plastic deformation process. Interact of deformation and heat conduction results in producing large temperature unevenness inside the billet. The unevenness has a great effect on the mechanical property and microstructure of the forged blade. However, internal quality of the blade is decided by its microstructure, it is necessary to conduct a research on the microstructure of the blade forging process. Taking a blade with a tenon as an object, its precision forging process is simulated and analyzed using a 3D coupled thermo-mechanical FEM code. And based on the prediction model of Ti-6Al-4V presented by the predecessor, a study of the evolution of grain size in the forging process is made. The distribution characteristics of grain size in typical sections are obtained under various deformation degrees. This study may provide a base for designing the blade forging process and working out its parameters.
关键词:
Blade
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Mei ZHAN
,
He YANG
,
Yuli LIU
材料科学技术（英文）
With the development of computer technology and finite element method, the priority research area of plastic forming has focused on 3D FE simulation of forming processes for components with complicated geometrical shape. These processes have complex deforming mechanism, and different sections have different deforming characteristics. Therefore, for making a simple, convenient, and practical analysis of its deforming law, how to obtain deformation information of key sections from the results of 3D FE simulation has become one of problems urgently to be solved. So, a method of obtaining deformation information by tracing deformation from sections for 3D FE simulation has been proposed. From the deformation information got by this method, the deformation law of key locations and the whole deforming body can be obtained. This method can also help to compare the result from FE simulation with that from physical modeling. Key procedures of this method have been presented in detail, and it has been tested by applying to 3D FE simulation of precision forging of the blade with a damper platform. The result shows that the method is practicable and reliable, and it can also be applied to 3D FE simulation of plastic forming processes of other components.
关键词:
Plastic forming
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