固溶温度对15-5PH不锈钢耐点蚀性能的影响

中国腐蚀与防护学报

2012, Vol. 32

Issue (4): 333-337

研究报告

本期目录 | 过刊浏览

固溶温度对15-5PH不锈钢耐点蚀性能的影响

周贤良^1,2,聂轮²,华小珍²,刘智勇²,崔霞²,彭新元²

1. 南昌航空大学教育部无损检测重点实验室南昌 330063
2. 南昌航空大学材料科学与工程学院南昌 330063

EFFECTS OF SOLID SOLUTION TEMPERATURE ON PITTING CORROSION BEHAVIOR OF 15-5PH PRECIPITATION HARDENED STAINLESS STEEL

ZHOU Xianliang^1,2, NIE Lun², HUA Xiaozhen², LIU Zhiyong², CUI Xia², PENG Xinyuan²

1. Key Laboratory of Nondestructive Test, Ministry of Education, Nanchang Hangkong University, Nanchang 330063
2. School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063

全文: PDF(1763 KB)

摘要: 用化学浸泡、极化曲线、循环极化曲线和电化学阻抗谱等方法研究了不同温度固溶后直接时效状态的15-5PH马氏体沉淀硬化不锈钢的耐点蚀性能，并用金相显微镜、X射线衍射仪(XRD)和扫描电子显微镜(SEM)分析其显微组织和析出相。结果表明，15-5PH不锈钢随着固溶温度的升高，自腐蚀电位减小，自腐蚀电流和腐蚀速率增大，耐点蚀性能下降。不同温度固溶后时效的基体组织均为板条马氏体和少量奥氏体，且均有NbC相析出。在1000℃下固溶后时效组织较均匀，析出相少，耐点蚀性能优异。在1070℃下固溶后时效组织中有Cu析出，进而导致其耐点蚀性能下降。

关键词 ：固溶温度, 15-5PH马氏体沉淀硬化不锈钢, 点蚀

Abstract：The pitting corrosion resistance property of 15-5PH martensite precipitation hardened stainless steel with direct aging treatment after different solution temperature was investigated by immersion test, polarization curves,cyclic polarization curves and electrochemical spectroscopy. The microstructure and phases precipitated was studied by optical metallography, X-ray diffraction(XRD) and scanning electron microscopy(SEM). The results show that with the solution temperature ascending, the self-corrosion potential became negative, the self-corrosion current and the corrosion rate increased but the pitting corrosion resistance property was decreased. The microstructure of aging treatment after different solution temperature was lath martensite and a few austenite. The NbC carbide were observed in the specimen quenched and aged at 550℃ for 4 h. The homogeneity of the microstructure and less precipitates solution treatment at 1000℃ had the best pitting corrosion resistance. When solution treatment at 1070℃ the Cu-rich precipitates distributed, but Cu precipitation led to the declination of pitting corrosion resistance.

Key words： solid solution temperature 15-5PH martensite precipitation hardened stainless steel pitting corrosion

收稿日期: 2011-05-25

ZTFLH:

TG156

基金资助:

国家自然科学基金(50901041)、江西省自然科学基金(2009GZC5009)、江西省教育厅重点实验室基金(DB200901399)和江西省教育厅科技项目(GJJ11524)资助

通讯作者: 周贤良 E-mail: nielun23@126.com

Corresponding author: ZHOU Xianliang E-mail: nielun23@126.com

作者简介: 周贤良，男，1957年生，教授，博导，研究方向为钢铁高温氧化、大气腐蚀以及金属基复合材料

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引用本文:

周贤良,聂轮,华小珍,刘智勇,崔霞,彭新元. 固溶温度对15-5PH不锈钢耐点蚀性能的影响[J]. 中国腐蚀与防护学报, 2012, 32(4): 333-337.
ZHOU Xian-Liang. EFFECTS OF SOLID SOLUTION TEMPERATURE ON PITTING CORROSION BEHAVIOR OF 15-5PH PRECIPITATION HARDENED STAINLESS STEEL. J Chin Soc Corr Pro, 2012, 32(4): 333-337.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2012/V32/I4/333

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