摘要
Blade precision forging is a high temperature and large plastic deformation process. Interaction of deformation andheat conduction results in producing large temperature unevenness inside the billet. The unevenness has a greateffect on the mechanical property and microstructure of the forged blade. However, internal quality of the blade isdecided 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 coupledthermo-mechanical FEM code. And based on the prediction model of Ti-6Al-4V presented by the predecessor, astudy of the evolution of grain size in the forging process is made. The distribution characteristics of grain size intypical sections are obtained under various deformation degrees. This study may provide a base for designing theblade forging process and working out its parameters.
基金
This work was supported by the National Natural Science Foundation of China for Distinguished Young Scholar (No.50225518), the Teaching and Research Award Program for Outstanding Young Teachers in Higher Education Institutions of MOE,P.R.C.,the Aeronautical Science Foundation of China (No.02H53061)and the Natural Science Foundation of shaan'xi Province (NO,2001CS0401).
