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应用液压机对690合金圆锥试样在3种不同温度下(1100、1140和1180℃)进行连续压缩变形实验,利用光学显微镜和背散射衍射技术研究690合金在热加工过程的动态再结晶行为.研究发现:在连续热压缩变形过程中动态再结晶以三叉晶界形核—原始晶界形核—孪晶形核(孪晶界和孪晶碎化)—晶内形核的顺序发展,而孪晶促进了690合金的再结晶过程.
The continuous compression set experiments of 690 alloy conical specimens at three different temperatures (1100, 1140 and 1180 ℃) were carried out by hydraulic press, and the dynamic recrystallization behavior of 690 alloy during thermal processing was studied by using optical microscope and backscatter diffraction technique. It is found that the dynamic recrystallization develops in the order of trigeminal grain boundary nucleus-pristine grain boundary nucleation-twin nucleation (twinning and twinning) -internuclear nucleation during the continuous hot compression deformation, while the twin Promote the recrystallization process of 690 alloy.