论文部分内容阅读
以2219铝合金为研究对象,通过计算建立了该铝合金不同应变时的热加工图,得出适用于热加工工艺的参数。基于热加工理论基础,在Gleebe-1500热模拟机上对2219铝合金进行热加工压缩试验,根据动态材料学模型建立2219铝合金的热加工图。在所得热加工图基础上研究了2219铝合金在温度380~480℃、应变速率0.01~50 s-1条件下的热加工变形特性。结果表明,不同应变量条件下热加工图存在差异;在应变为0.4的条件下,热加工图存在三个失稳区,最佳变形区域的功率耗散系数η为0.31。
Taking 2219 aluminum alloy as the research object, the thermal processing diagram of the aluminum alloy under different strains was established and the parameters suitable for the thermal processing technology were obtained. Based on the theoretical basis of hot working, the hot working compression test of 2219 aluminum alloy was carried out on the Gleebe-1500 thermal simulator, and the hot working diagram of 2219 aluminum alloy was established according to the dynamic material model. Based on the obtained hot working drawing, the hot working deformation characteristics of 2219 aluminum alloy under the temperature of 380 ~ 480 ℃ and the strain rate of 0.01 ~ 50 s-1 were studied. The results show that there are differences in hot workings under different strain levels. Under strain of 0.4, there are three unstable regions in the hot working diagram, and the power dissipation coefficient η of the optimum deformation region is 0.31.