摘要
利用MSC．SuperForm有限元分析软件对In718合金镦粗过程进行三维数值模拟和试验研究．分析了不同温度、摩擦和变形速率条件下等效应力-应变分布和载荷曲线。通过热模拟试验研究了In718合金不同条件下的真应力-应变曲线和微观组织。结果表明：镦粗变形分为三个变形区域，摩擦增加了变形的不均匀性和塑性变形抗力：高温锻造过程中，In718合金在基体边界上发生了动态再结晶，再结晶晶粒细小，动态再结晶进行程度随着工艺条件的不同而不同；In718合金比较合适的锻造温度为1010-1040℃之间，变形速率为0．05～0．5s^-1之间,最大变形程度可以达到70％以上。
The hot-forging process for In718 alloy was simulated and studied by MSC.Superform software.The distribution of equivalent stress-strain and load-time curves at different temperature, friction and rate of deformation were analyzed. The microstructure and true stress-strain curves of In718 alloy after hot-forging was stndied. The results show that the deformation of upset falls into three zones,the friction makes the nonuniform and resistance of deformation become great. During the hot-forging, the alloy appears recrystallization at the base boundary and the grains are much smaller. The recrystal degree is different with different technological conditions. The better hot-forging temperature is 1 010-1 040℃ and deformation rate is 0.05-0.5 s^-1.
出处
《热加工工艺》
CSCD
北大核心
2006年第21期69-72,共4页
Hot Working Technology
