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Date of Publication:2007-01-01

Journal:大连理工大学学报

Issue:3

Page Number:353-357

ISSN No.:1000-8608

Abstract:In high-temperature forging processes, the thermomechanical field variables, such as temperature and strain, have an important influence on the inner crack damage and microstructure in the forging part. The forging process of a gas turbine compressor blade is simulated using 3D rigid-viscoplastic finite element (FE) method. FE analysis provides detailed information on the thermomechanical field variables such as temperature and strain and forging loads, which can be incorporated into process design. On the basis of these results, an optimized process is put forward incorporated with the mechanism of crack damage and recovery and evolvement laws of recrystallized structure. The optimized parameters are 1160��C of preforging temperature and 1120��C of finish forging temperature, and the preforging is conducted under 4 mm forging stroke on the basis of finish forging. The feasibility of optimized process is verified through comparisons with industrial trials. The results can provide the scientific basis for engineering application of the process.

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