章威,董洪波,杨新

• 1:南昌航空大学航空制造工程学院

摘要(Abstract)：

采用Gleeble-3500热模拟试验机对Q550D超低碳贝氏体钢进行等温压缩变形试验,研究了该合金在变形温度为1000～1150℃、应变速率为0.01～0.1 s-1条件下的流变行为。通过应力-应变曲线研究了Q550D钢的动态再结晶规律,并采用硬化率-应变(θ-ε)曲线较精确地确定了动态再结晶的临界条件和峰值应力应变。利用Avrami方程和应力应变曲线建立Q550D钢动态再结晶动力学模型。并通过线性回归分析计算出Q550D超低碳贝氏体钢变形激活能Q,获得了Q550D超低碳贝氏体钢高温条件下的流变应力本构方程。

关键词(KeyWords)： Q550D;动态再结晶;动力学模型;变形激活能;本构方程

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(50964012);; 新金属材料国家重点实验室开放基金资助项目(2010Z-06)

作者(Author): 章威,董洪波,杨新

DOI: 10.13289/j.issn.1009-6264.2012.12.030

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