论文部分内容阅读
利用Gleeble-3500热模拟试验机进行了高温压缩试验,研究了Ni-Cr-Co-Mo合金在变形温度950~1080℃、应变速率0.01~10 s~(-1)下的热变形行为。基于动态材料模型构建了合金热加工图。结果表明:合金在试验条件下具有正应变速率敏感性。合金的平均热变形激活能为566.758 kJ/mol。当应变为0.4时,合金的流变失稳区域较大,说明该合金在大应变时加工难度很大。在变形温度为1000℃时,随着应变速率降低,动态再结晶更加充分。合金最佳工艺参数为变形温度1000~1050℃、应变速率0.01~0.1 s~(-1)。
High-temperature compression tests were carried out on a Gleeble-3500 thermal simulator to study the thermal deformation behavior of Ni-Cr-Co-Mo alloy at deformation temperature of 950 ~ 1080 ℃ and strain rate of 0.01 ~ 10 s ~ (-1). Based on the dynamic material model, an alloy hot working diagram was constructed. The results show that the alloy has positive strain rate sensitivity under the experimental conditions. The average activation energy of the alloy is 566.758 kJ / mol. When the strain is 0.4, the rheological instability region of the alloy is larger, indicating that the alloy is very difficult to process in the large strain. At deformation temperature of 1000 ℃, with the strain rate decreases, the dynamic recrystallization more fully. The optimum technological parameters of the alloy are deformation temperature of 1000 ~ 1050 ℃ and strain rate of 0.01 ~ 0.1 s ~ (-1).