摘要
提出了一种基于挤压实验的材料本构关系模型的新方法，即根据管材挤压实验数据建立适合于管材挤压变形时的材料本构关系模型。在16.3MN挤压机上对高温合金IN625进行了热挤压试验研究。根据热挤压实验数据以及Arrhenius型材料本构模型，确定了高温合金IN625管材挤压变形的材料本构关系模型，该模型的计算结果和实验结果的相对误差小于7.8％。确定的本构关系模型的适用温度为1150～1200℃，应变速率为1.86～7.44 s^-1。
A new method of material constitutive model based on extrusion test was put forward, that is the material constitutive model for tube extrusion was established according to tube extrusion experiment data. The experiment of superalloy IN625 was done on 16.3MN extrusion machine. According to the extrusion test data and the Arrhenius equation, the material constitutive model of supperalloy IN625 in tube extrusion was determined. And the relative error between calculation results by the model and experiment results is less than 7.8%.The suitable conditions of the constitutive model of supperalloy IN625 are that the temperature is 1150-1200℃, and strain rate is 1.86-7.44 s^-1.
出处
《热加工工艺》
CSCD
北大核心
2014年第3期81-83,共3页
Hot Working Technology
基金
国家自然科学重点基金项目(50834008)
