【摘要】 利用Gleeble–3800热压缩模拟试验机,对TC21合金在830～1010℃、0.0005～10s^–1条件下进行了热压缩试验。以试验数据为基础,以Arrhenius热变形本构关系模型推导、不同失稳判据下的热加工图的构建为研究主线,获得了该合金不同热变形工艺参数下的本构关系模型和不同失稳判据（Gegel、Malas、Prasad、Murty、Semiatin失稳判据）下的热加工图,并对上述5种失稳判据的理论依据及预测结果进行了分析。应用热加工图理论并结合微观组织,预测了该合金的适合成形加工区和流变失稳区,为TC21合金热加工工艺参数进行了科学合理的优化。更多还原

【Abstract】 TC21 alloy was carried out on Gleeble–3800 thermal compression simulation tester at temperatures and strain rates ranging of 830–1010℃ and 0.0005–10 s^–1. Based on the compressed experimental data, taking the hot deformation constitutive relation model derivation of Arrhenius and the hot processing map construction under different instability criterion as the main line of the study, the constitutive model under different hot deformation parameters and the hot processing map under different instability criterion（Gegel,.Malas, Prasad, Murty, Semiatin） were obtained. Then, the theoretical basis and prediction results of above five instability criterion were analyzed. By using the theory of hot processing map combining with microstructure, the suitable forming and flowing instability areas were predicted, and hot working processing parameters of TC21 alloy are optimized scientifically and rationally.更多还原