| 溶解氧和温度对O6Cr17Ni12Mo2Ti不锈钢在超临界水中应力腐蚀的影响 |
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| 引用本文： | 陆辉,沈朝,张乐福,唐睿,张强.溶解氧和温度对O6Cr17Ni12Mo2Ti不锈钢在超临界水中应力腐蚀的影响[J].北京科技大学学报,2015(11):1456-1462. |
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| 作者姓名： | 陆辉 沈朝 张乐福 唐睿 张强 |
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| 作者单位： | 1. 上海交通大学核科学与工程学院,上海,200240;2. 中国核动力研究设计院,成都,610041 |
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| 基金项目： | 国家重点基础研究发展计划项目 |
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| 摘 要： | 通过慢应变速率拉伸试验,在超临界水环境中研究了溶解氧和温度对06Cr17Ni12Mo2Ti不锈钢的应力腐蚀开裂倾向的影响规律. 试验结果表明:在含不同溶解氧量(0/200/2000μg·kg-1 ) 的450℃和550℃超临界水环境中,不锈钢都呈现出不同程度的应力腐蚀开裂倾向. 随着水中溶解氧含量的增加,不锈钢的应力腐蚀开裂倾向更为明显. 随着温度的上升,应力腐蚀开裂倾向反而会下降. 在含不同溶解氧量(0/200/2000μg·kg-1 )的650℃超临界水环境中,不锈钢只发生塑性断裂,未发现应力腐蚀开裂倾向,并且溶解氧对其影响也不是很明显.
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| 关 键 词： | 超临界水 奥氏体不锈钢 应力腐蚀开裂 慢应变速率试验 拉伸试验 |
Effects of dissolved oxygen and temperature on the stress corrosion of O6Cr17Ni12Mo2Ti stainless steel in supercritical water |
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| Abstract: | The effects of dissolved oxygen (DO) and temperature on the stress corrosion cracking (SCC) of 06Cr17Ni12Mo2Ti stainless steel ( SS) in supercritical water environments were investigated by slow strain rate tensile tests ( SSRT) . It is found that the SCC susceptibility of the stainless steel is observed in 450℃ and 550℃ supercritical water environments containing different amounts of dissolved oxygen (0/200/2000μg·kg-1). The effect of dissolved oxygen on the SCC susceptibility is more remarkable with increas-ing amount of dissolved oxygen. However, the SCC susceptibility decreases with the increase of temperature. In 650℃ supercritical water environments containing different amounts of dissolved oxygen (0/200/2000μg·kg-1), ductile fracture can be found, but the SCC susceptibility is not observed. In these environments, the effect of DO is negligible. |
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| Keywords: | supercritical water austenitic stainless steel stress corrosion cracking slow strain rate testing tensile testing |
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