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| Simulation of?grain size evolution in the die forging process of gear and bearing steel |
| HUANG Yuan-sheng1,2，YANG Mao-sheng2，LI Jing-she1，MENG Wen-jia1,2 |
1. School of Metallurgical and Ecological Engineering， University of Science and Technology Beijing， Beijing 100083，China
2. Institute for Special Steels， Central Iron and Steel Research Institute， Beijing 100081， China |
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Abstract The deformation?parameters in different parts of the gear?and bearing billet during forging?process are different， and the evolution of grain size is very complex. In this paper， material parameters were obtained through the Gleeble isothermal compression test， the secondary developments?of the finite element software?DEFORM-3D were carried based on the YLJ?recrystallization model. The evolution of grain size in different parts?of gear and bearing steel was simulated. The results show that the grain size of gear?and bearing steel changes in pulse during forging?stage， the growth?amplitude of the?grain in different parts during the recrystallization is complicated， the grain size in the bottom edge and the lower part are easy to grow up and the grain size in the center?and the upper part are fine. The simulated grain morphology and grain size in the center and the bottom?edge corresponds well to the actual one. The complex?evolution of grain size during the die forging process can be well predicted with the simulation method proposed in this paper.
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Received: 01 September 2014
Published: 08 September 2015
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2015, Vol. 50 
