论文部分内容阅读
为了确定AZ31镁合金轧制工艺参数,利用Gleeble--3500热模拟试验机进行热压缩试验以测试其热变形行为,并根据动态材料模型理论得到其热加工图.当变形温度为380～400℃、应变速率为3～12 s-1时,功率耗散效率大于30%,属于动态再结晶峰区;在该区域进行异步轧制变形退火处理后得到平均晶粒直径为2.3μm的细晶组织,抗拉强度为322.7MPa,延伸率为19.6%.当应变速率大于15 s-1时,属于流变失稳区,250～300℃低温加工时合金的塑性显著降低,350～400℃高温加工时合金出现混晶组织.
In order to determine the rolling process parameters of AZ31 magnesium alloy, the hot compression test was carried out on the Gleeble - 3500 thermal simulation tester to test the thermal deformation behavior of the AZ31 magnesium alloy and its hot working drawing was obtained according to the theory of dynamic material model.When the deformation temperature was 380 ~ 400 ℃ , The power dissipation efficiency is more than 30% when the strain rate is 3 ~ 12 s-1, and belongs to the dynamic recrystallization peak area. After the as-received rolling deformation annealing in this area, the fine grain structure with the average grain diameter of 2.3μm , The tensile strength is 322.7MPa and the elongation is 19.6%. When the strain rate is more than 15s-1, it belongs to the rheological instability zone. The plasticity of the alloy decreases remarkably when the temperature is between 250-300 ℃ and the temperature is 350-400 ℃ Mixed alloy appears when the alloy.