屈霞,董学泉,叶存冬,孔德军

• 1:常州大学城市轨道交通学院
• 2:常州大学机械工程学院

摘要(Abstract)：

采用慢应变速率实验(SSRT)研究了S355钢在3.5%Na Cl溶液中应力腐蚀破裂(SCC)行为,通过σ-ε曲线分析了不同温度下S355钢应力腐蚀开裂敏感性指数。采用SEM观察了断口及其孕育期、扩展区、瞬断区和腐蚀物形貌,并分析了腐蚀物化学成分。结果表明,随溶液温度升高,内积功应力腐蚀敏感性指数ISCC下降,在20~50℃范围内ISCC均小于25%,断口为韧性断口,S355钢在3.5%Na Cl溶液中没有明显的应力腐蚀倾向;随溶液温度升高,开裂源变小,而韧窝尺寸和氧化物体积变大,抗氢致开裂能力增强,说明S355钢具有较高的抗应力腐蚀性能。

关键词(KeyWords)： S355钢;海洋平台;温度;应力腐蚀;慢拉伸试验;断口形貌;敏感性指数

Abstract:

Keywords:

基金项目(Foundation): 江苏省科协首席专家(工程师)项目(2013-216)

作者(Author): 屈霞,董学泉,叶存冬,孔德军

DOI: 10.13289/j.issn.1009-6264.2015.09.013

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