(上海交通大学 模具CAD国家工程研究中心，上海 200030)
摘 要:
在PRASAD提出的二维加工图的基础上，建立包含应变的三维加工图，经分析得到适合镁合金ZK60的失稳判据，讨论并解决了三维加工图绘制中的关键技术。在Gleeble−1500热模拟机上对镁合金ZK60进行了热压缩实验，研究了200~360 ℃和0.01~5 /s条件下的热变形行为。该加工图的结果显示一个非失稳、功率耗散峰值区：温度为300~360 ℃、应变速率为0.01~0.1 /s，功率耗散平均值为35%，此区为适合的加工区。
关键字: ZK60；三维加工图；动态材料模型；功率耗散系数；流变失稳
（National Die and Mold CAD Engineering Research Center, Shanghai Jiao Tong University, Shanghai 200030, China）
Abstract:Based on the processing map proposed by PRASAD, the three-dimensional processing maps including strain were built and the favorite instability criterion was studied and the key technologies in plotting the three-dimensional processing maps were discussed. The Gleeble−1500 thermomechanical simulation tests of magnesium alloy ZK60 were conducted. The hot deformation behaviors in the temperature range of 200−360 ℃ and strain rate range of 0.01−5 /s were studied. The three-dimension processing maps show that the most favorite deformation domain is the temperature range of 300−360 ℃ and the strain rate range of 0.01−0.1 /s, with a peak efficiency of power dissipation of about 28%.
Key words: ZK60; 3-D processing map; dynamic material model; power dissipation efficiency; flow instability
