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以AISI10 4 5钢圆柱体在环形加热源局部加热下的差温无模锻造为例 ,利用热力耦合有限元方法模拟其成形过程。模拟结果表明 ,差温无模锻造作为零件近净成形的一种新工艺是可行的。差温无模锻造成形的关键是要获得和控制金属坯料内部适宜的不均匀分布温度场 ,加热环和冷却环的适当组合可以获得成形所需的温度分布花样。在快速变形方式下 ,变形前的温度分布花样基本上决定了金属的流动模式 ,变形过程的持续加热对其影响甚微 ;在慢速变形方式下 ,变形过程的持续加热对金属的流动模式产生一定的影响。
Taking the differential temperature and dieless forging of AISI10 4 5 steel cylinder under the local heating of circular heating source as an example, the forming process of the AISI10 4 5 steel cylinder was simulated by the finite element method. The simulation results show that it is feasible to use the differential temperature and dieless forging as a new process for the near net shape of the part. The key point of differential-temperature dieless forging is to obtain and control the suitable non-uniform distribution temperature field inside the metal blank. The suitable combination of heating ring and cooling ring can obtain the required temperature distribution pattern for forming. In the rapid deformation mode, the pattern of temperature distribution before deformation basically determines the flow pattern of the metal, and the continuous heating of the deformation process has little effect on it. In the slow deformation mode, the continuous heating of the deformation process produces the metal flow pattern A certain impact.