| 304不锈钢焊缝在NaCl溶液中SCC的下限温度 |
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| 引用本文： | 方智, 曹备, 吴荫顺, 朱日彰. 304不锈钢焊缝在NaCl溶液中SCC的下限温度[J]. 工程科学学报, 1994, 16(S1): 12-16. DOI: 10.13374/j.issn1001-053x.1994.s1.003 |
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| 作者姓名： | 方智 曹备 吴荫顺 朱日彰 |
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| 摘 要： | 本文用慢应变速率实验技术研究了304不锈钢焊接接头在NaCl溶液中的应力腐蚀行为。结果发现:该体系发生应力腐蚀存在一个界限温度,NaCl浓度低于1.0mol/L时,界限温度随NaCl浓度的增加而下降;NaCl浓度高于1.0mol/L时,SCC的界限温度在很宽NaCl浓度范围内变化不大。并给出了该体系发生SCC的T°(C)-[Cl-]-SCC图。焊接接头的应力腐蚀发生在焊缝区,应力腐蚀裂纹是沿着奥氏体枝晶间的δ-铁素体扩展的。
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| 关 键 词： | 焊缝 应力腐蚀开裂 氯化物 界限温暖 |
| 收稿时间： | 1993-10-08 |
The Critical Temperature for The SCC of 304SS Weldments in Solutions of NaCl |
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| Fang Zhi, Cao Bei, Wu Yinshun, Zhu Rizhang. The Critical Temperature for The SCC of 304SS Weldments in Solutions of NaCl[J]. Chinese Journal of Engineering, 1994, 16(S1): 12-16. DOI: 10.13374/j.issn1001-053x.1994.s1.003 |
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| Authors: | Fang Zhi Cao Bei Wu Yinshun Zhu Rizhang |
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| Abstract: | The stress corrosion cracking of 304SS weldments in NaCl solutions has been shudied by SSRT technique.It was found that there exists a critical temperature for the SCC in this system.The cirtical temperature decreases with the increase of NaCl concentration when the concentration of NaCl is lower than 1.0mol/L, but it doesn't change much in a wide range of NaCl concentration when the concentration of NaCl is higher than 1.0mol/L.The diagram of T(℃)-[Cl-]-SCC has been given.For the weldment,SCC occurs in weld fusion zone and propagates along δ-ferrite phase between austenite dendrites. |
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| Keywords: | weld stess corrosion cracking chloride critical temperature |
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