采用Gleeble-1500型热模拟试验机对6063铝合金进行了变形温度为400~520℃、应变速率为0.01~10 s
-1的热压缩试验，研究了热压缩过程的温升，在考虑了热传导和热辐射的作用后，探究了变形温度、应变速率和应变量等对绝热校正因子的影响，优化了材料变形的温升方程，对中等应变速率下热压缩的温升进行了修正。结果表明：绝热校正因子随着应变量的增大而降低，且变形温度越高，应变速率越大，则绝热校正因子就越大；热传导和热辐射对合金变形过程的温升具有显著的影响，修正后的温升与应变呈非线性关系，计算得到的温度变化曲线与实际所测得的基本一致，平均误差值小于3%。
所属栏目
物理模拟与数值模拟国家自然科学基金面上资助项目（51475156）；国家科技重大专项项目（2014ZX04002071）
收稿日期
2016/8/272017/5/2
作者单位
李世康:湖南大学汽车车身先进设计制造国家重点实验室, 长沙 410082湖南大学机械与运载工程学院, 长沙 410082
李落星:湖南大学汽车车身先进设计制造国家重点实验室, 长沙 410082湖南大学机械与运载工程学院, 长沙 410082
徐戎:湖南文理学院机械工程学院, 常德 415000
备注
李世康(1986-),男,河南开封人,博士研究生
引用该论文:
LI Shikang,LI Luoxing,XU Rong.Temperature Rise Correction of 6063 Aluminum Alloy during Hot Compression at Medium Strain Rate Considering Heat Conduction and Thermal Radiation[J].Materials for mechancial engineering,2017,41(7):98～104
李世康,李落星,徐戎.考虑热传导和热辐射时6063铝合金在中等应变速率下热压缩温升的修正[J].机械工程材料,2017,41(7):98～104
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