回火温度对Cr-13型马氏体不锈钢晶间腐蚀行为影响
PDF下载 (141)吴梦辉,鲁思渊.回火温度对Cr-13型马氏体不锈钢晶间腐蚀行为影响[J].宁波大学学报(理工版),2025,38(5):80-85.DOI:10.20098/j.cnki.1001-5132.2025.0212
WU Menghui,LU Siyuan.Influence of tempering temperature on the intergranular corrosion of a Cr-13 type martensitic stainless steel[J].Journal of Ningbo University(Natural Science & Engineering Edition),2025,38(5):80-85.DOI:10.20098/j.cnki.1001-5132.2025.0212
| Title: | Influence of tempering temperature on the intergranular corrosion of a Cr-13 type martensitic stainless steel |
| 作者: | 吴梦辉, 鲁思渊 |
| Author(s): | WU Menghui, LU Siyuan |
| 关键词: | 晶间腐蚀; 马氏体不锈钢; 回火热处理; 双环电化学动电位再活化法; 析出物 |
| Keywords: | intergranular corrosion; martensitic stainless steel; tempering heat treatment; double-loop electrochemical potentiokinetic reactivation; precipitation |
| 分类号: | TG178 |
| DOI: | 10.20098/j.cnki.1001-5132.2025.0212 |
| 文献标识码: | A |
| 摘要: | Cr-13型马氏体不锈钢（MSS）耐晶间腐蚀性能的影响，使用双环电化学动电位再活化法（DL-EPR）对在2种回火温度（300℃和500℃）下处理的MSS进行检测，通过2组不同测试溶液测定材料的晶间腐蚀敏感性，筛选出适宜测试溶液，并利用扫描电子显微镜对不同回火温度下的样品微观形貌进行观察分析。观察发现300℃回火样品在测试溶液中主要呈现均匀腐蚀和细且稀疏的晶间腐蚀裂纹，而500℃回火样品则是严重的晶间腐蚀形貌，2种样品的晶间腐蚀均集中在富Cr碳化物和马氏体晶界处。结果表明，MSS晶间腐蚀主要受回火过程中析出的碳化物控制，伴随着Cr23C6碳化物的大量析出，材料晶间腐蚀敏感性升高。 |
| Abstract: | The intergranular corrosion behavior of a Cr-13 type martensitic stainless steel (MSS) tempered at two different temperatures, 300℃ and 500℃, was investigated in the current work. Double-loop electrochemical potentiokinetic reactivation (DL-EPR) method was employed to assess the susceptibility of MSS to intergranular corrosion in solutions, confirming a suitable solution for MSS. Scanning electron microscopy (SEM) observations revealed that the 300℃ tempered sample exhibited primarily uniform corrosion in the solution along with narrow and sparse intergranular corrosion cracks, whereas the 500℃ tempered sample displayed severe intergranular corrosion morphology. In both samples, intergranular corrosion predominantly occurred at the Cr-rich carbides and martensite grain boundaries. The results indicate that the intergranular corrosion of MSS is primarily controlled by the carbides precipitated during the tempering process, with an increase in Cr23C6 secondary carbides leading to heightened susceptibility to intergranular corrosion. |
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| 备注/Memo: | 收稿日期：2025−02−25 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ 基金项目：浙江省“尖兵领雁”研发攻关计划项目（2024C01245（SD2））；宁波市自然科学基金（2023J087）；2024年慈溪市重点研发（CZ2025012） 第一作者：吴梦辉，硕士研究生，主要研究方向为不锈钢应力腐蚀和晶间腐蚀。E-mail: 2211090183@nbu.edu.cn *通信作者：鲁思渊，博士/教授，主要研究方向为不锈钢及高熵合金的耐蚀性能。E-mail: lusiyuan@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
