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Microstructure optimization design methods of the forging process and applications |
| WANG Guangchun, ZHAO Guoqun, GUAN Jing |
| Mold & Die Engineering Technology Research Center, Shandong University (Southern campus), Jinan 250061, China; |
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Abstract A microstructure optimization design method of the forging process is proposed. The optimization goal is the fine grain size and homogeneous grain distribution. The optimization object is the forging process parameters and the shape of the preform die. The grain size sub-objective function, the forgings shape sub-objective function and the whole objective function including the shape and the grain size are established, respectively. The detailed optimization steps are given. The microstructure optimization program is developed using the micro-genetic algorithm and the finite element method. Then, the upsetting process of the cylindrical billet is analyzed using a self-developed program. The forging parameters and the shape of preform die of the upsetting process are optimized respectively. The fine size and homogenous distribution of the grain can be achieved by controlling the shape of the preform die and improving the friction condition.
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Issue Date: 05 June 2007
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