包喜荣,王均安,王晓东,陈林,刘永珍

• 1:上海大学材料科学与工程学院材料研究所
• 2:内蒙古科技大学材料与冶金学院
• 3:内蒙古科技大学矿业与煤炭学院
• 4:内蒙古工业大学材料科学与工程学院

摘要(Abstract)：

采用Gleeble-1500D热模拟实验机进行热压缩实验,研究一种Cr-Mo-Ni系贝氏体钢在变形温度为850~1150℃和应变速率为0.01~10 s-1条件下的动态再结晶行为。结果表明,试验钢中添加合金元素Cr、Mo、Ni,由于固溶原子拖曳及析出物的钉扎作用,显著抑制动态再结晶;动态再结晶开始时间与变形温度的关系曲线(RTT曲线)分析表明,变形温度降低及变形速率加快均延长动态再结晶开始时间tc,温度补偿应变速率因子(Z因子)变大,愈难发生动态再结晶软化;通过线性回归计算了动态再结晶激活能Q,建立了形变Z因子模型,并回归了峰值应力、峰值应变、临界应变与Z因子的关系式,最后利用Avrami方程和应力-应变曲线建立了Cr-Mo-Ni系贝氏体钢的动态再结晶动力学模型。

关键词(KeyWords)： 贝氏体钢;动态再结晶;热模拟;数学模型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51461034);; 内蒙古自然科学基金(2014MS0524);内蒙古自然科学基金(2014MS0532);; 内蒙古科技大学创新基金(2014QDL036);内蒙古科技大学材料与冶金学院青年人才孵化基金(2014CY012)

作者(Author): 包喜荣,王均安,王晓东,陈林,刘永珍

DOI: 10.13289/j.issn.1009-6264.2016.04.037

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