王殊寻,邓沛然,曹阳根,苏钰,李二玲

• 1:上海工程技术大学材料工程学院

摘要(Abstract)：

对304不锈钢在25~600℃进行热拉伸实验,得到了不同温度下的真实应力-应变曲线,并且通过扫描电子显微镜(SEM),X射线衍射仪(XRD)对拉伸断口及断口的形貌变化进行了分析。结果表明:随着实验温度的升高,304不锈钢的强度下降,塑性提高;在实验温度范围内,应变量小于2.5%,在达到同等变形量的条件下,室温下材料变形所需要的应力远高于加热情况下所需应力,这表明只要适当地升高温度,这种材料的塑性就会大为改善。当温度到达600℃时,材料的晶界明显弱化,断口韧窝形态减少,断裂以沿晶断裂为主。

关键词(KeyWords)： 304不锈钢;热拉伸;强度;组织

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(051301105);; 校基金项目(A-2600-12-01066)

作者(Author): 王殊寻,邓沛然,曹阳根,苏钰,李二玲

DOI: 10.13289/j.issn.1009-6264.2014.12.015

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