利用Gleeble-3500热力模拟试验机,在温度为850～1150℃,应变速率为0.1～10s~(-1)的条件下,对具有高强韧性的Fe-14Co-10Ni基合金(16CoNi)在高温塑性变形过程中的动态再结晶行为及其热加工图进行了研究.试验结果表明,16CoNi合金的具有较高的动态再结晶温度,完全动态再结晶晶粒的平均尺寸随着Zener-Hollomon参数的增加而减小,并得到了动态再结晶晶粒尺寸与Z参数之间的定量关系.基于动态材料模型建立了16CoNi合金的热加工图(Processing Maps),当以0.1s~(-1)的应变速率,在1050℃变形时,合金的能量消耗效率达到最大值34%.
Using a Gleeble-3500 simulator the dynamic reerystallization behavior and processing map of 16CoNi alloy with high strength and toughness were investigated at 850～1150℃ with the strain rate of 0.1 ～ 10s~(-1) . The results show that 16CoNi alloy has a higher dynamic recrystallization temperature. The size of fully dynamic recrystallization grains decreases with increasing Zener-Hollomon parameter. The relationship formula between the size of dynamic recrystallization grains and Zener-Hollomon parameter is obtained. The processing map for 16CoNi alloy is established and analyzed loased on the dynamic materials model. At 1050℃ and stain rate 0. 1s~(-1) the efficiency of energy dissipation for the alloy reaches the peak value of 34%.
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