张丽芳,刘永长

• 1:天津大学材料科学与工程学院现代连接技术天津市重点实验室

摘要(Abstract)：

通过高精度差分膨胀仪记录了Fe-4Cr合金在连续冷却过程中的线膨胀行为,获得其在不同冷速(75、150和330 K/min)下奥氏体→铁素体相变的相关动力学信息,并利用相变动力学模型解析式拟合了Fe-4Cr合金转变体积分数随温度变化的实验曲线。研究表明:冷却速度主要是通过改变晶界之间的位相角来影响动力学参数,即生长激活能QG和指前因子v0,从而影响奥氏体→铁素体相变动力学。

关键词(KeyWords)： 差分膨胀仪;Fe-4Cr合金;动力学模型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金钢铁联合基金重点项目(50834011)

作者(Author): 张丽芳,刘永长

DOI: 10.13289/j.issn.1009-6264.2011.09.008

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