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利用热力耦合有限元方法 ,对AISI10 4 5钢圆柱体坯料在环形加热源局部加热下的差温无模预成形锻造过程进行了模拟研究。模拟结果表明 ,在坯料中获得和控制大梯度分布的不均匀温度场是实现无模预成形锻造的关键。复杂零件成形必须合理地组合加热源和冷却源 ,以便产生所需的温度梯度场。在快速变形条件下 ,变形过程中的持续加热对金属的流动影响甚微 ,变形前的温度分布基本上决定了金属的流动 ,但在慢速变形条件下 ,变形过程中的持续加热对金属的流动产生一定的影响 ,其影响程度视零件复杂程度而异。从该文研究结果可以预见 ,差温无模锻造可以发展成为一种无模锻造制坯新工艺
The thermomechanically coupled finite element method was used to simulate the forging process of AISI10 4 5 steel cylinder blank under the condition of local heating by a ring heat source. The simulation results show that obtaining and controlling the non-uniform temperature field with large gradient distribution in the blank is the key to realize the die-less preforming forging. Complex parts forming must combine heat sources and cooling sources reasonably to produce the desired temperature gradient field. Under the condition of rapid deformation, the continuous heating during the deformation has little effect on the flow of the metal. The temperature distribution before the deformation basically determines the flow of the metal. However, under the conditions of the slow deformation, the continuous heating during the deformation changes the metal Flow has a certain impact, the extent of its impact depends on the complexity of parts. It can be predicted from the results of the paper that the differential temperature and dieless forging process can be developed into a new process without die forging