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中国腐蚀与防护学报  2024, Vol. 44 Issue (6): 1610-1616     CSTR: 32134.14.1005.4537.2024.043      DOI: 10.11902/1005.4537.2024.043
  研究报告 本期目录 | 过刊浏览 |
B、Ce微合金化对S31254超级奥氏体不锈钢析出相及耐蚀性能的影响
马晋遥1,2, 董楠1, 郭振森1, 韩培德1()
1.太原理工大学材料科学与工程学院 太原 030024
2.太原理工大学分析测试中心 太原 030024
Effect of B and Ce Micro-alloying on Secondary Phase Precipitation and Corrosion Resistance of S31254 Super Austenitic Stainless Steel
MA Jinyao1,2, DONG Nan1, GUO Zhensen1, HAN Peide1()
1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2. Instrumental Analysis Center of Taiyuan University of Technology, Taiyuan 030024, China
引用本文:

马晋遥, 董楠, 郭振森, 韩培德. B、Ce微合金化对S31254超级奥氏体不锈钢析出相及耐蚀性能的影响[J]. 中国腐蚀与防护学报, 2024, 44(6): 1610-1616.
Jinyao MA, Nan DONG, Zhensen GUO, Peide HAN. Effect of B and Ce Micro-alloying on Secondary Phase Precipitation and Corrosion Resistance of S31254 Super Austenitic Stainless Steel[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(6): 1610-1616.

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摘要: 

采用OM、SEM、EDS、电化学测试等方法研究了B、Ce微合金化对S31254超级奥氏体不锈钢的析出相及耐蚀性的影响。析出相分析结果表明，B、Ce的添加都有抑制时效过程中析出相的析出作用，并且B、Ce复合后可改变析出相沿晶界的析出形态。电化学结果显示，B、Ce复合微合金化可提高材料的自腐蚀电位和点蚀电位，促进钝化膜的快速形成并同步提升其稳定性，改善材料的耐点蚀与耐晶间腐蚀性能。因此，本文的研究结果表明相较单一B元素的添加，B、Ce协同对S31254析出相的抑制和耐蚀性提高效果更为显著。
关键词 ： S31254超级奥氏体不锈钢,  B、Ce微合金化,  析出相,  耐蚀性能    
Abstract：

The effect of B and Ce micro-alloying on secondary phase precipitation and corrosion resistance of S31254 super austenitic stainless steel were studied by OM, SEM, EDS and electrochemical tests. The results show that the addition of B and Ce can inhibit the precipitation of secondary phase in the aging process and change the morphology of precipitated phase along the grain boundary. The B and Ce micro-alloying can also improve the free-corrosion potential and pitting potential of the S31254 super austenitic stainless steel, promote the rapid formation of passive film, improve its stability synchronously, thus improve the pitting and intergranular corrosion resistance of the steel. Therefore, it follows that the synergistic effect of both B and Ce co-alloying on precipitation inhibition and corrosion resistance of S31254 is significantly more pronounced when compared to the addition of a single B element.
Key words： S31254 super austenitic stainless steel    B    Ce micro-alloying    precipitated phase    corrosion resistance
收稿日期: 2024-02-02      32134.14.1005.4537.2024.043
ZTFLH:  TG174  
通讯作者: 韩培德，E-mail：hanpeide@tyut.edu.cn，研究方向为钢铁材料结构与性能
Corresponding author: HAN Peide, E-mail: hanpeide@tyut.edu.cn
作者简介: 马晋遥，男，1989年生，博士，助理研究员
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https://www.jcscp.org/CN/10.11902/1005.4537.2024.043      或      https://www.jcscp.org/CN/Y2024/V44/I6/1610

SampleCSiMnPSCrNiMoCuNBCe
0B0.0120.640.470.0350.00619.1818.116.170.710.2000
50B0.0120.610.490.0170.00518.5918.116.120.580.200.0050
50B-20Ce0.0180.171.820.0070.00219.8418.076.210.560.1990.0050.002
50B-50Ce0.0150.171.870.0080.00220.0817.946.020.480.1870.0050.005
表 1  实验用S31254不锈钢化学成分 (mass fraction / %)
图1  热处理工艺示意图
图2  4种S31254不锈钢经1220℃保温2 h固溶处理后的显微组织
图3  4种S31254不锈钢经950℃时效90 min后的SEM图
图4  4种S31254不锈钢在950℃时效90 min试样的EDS面扫图
PositionFeCrMoNi
0B-1(Fig.4a-1)39.226.722.38.1
0B-2(Fig.4a-2)44.525.621.88.1
50B-1(Fig.4b-1)38.722.924.69.9
50B-2(Fig.4b-2)39.822.822.710.8
50B-20Ce-1(Fig.4c-1)39.626.117.89.1
50B-20Ce-2(Fig.4c-2)40.225.716.69.4
50B-50Ce-1(Fig.4d-1)42.520.615.39.7
50B-20Ce-2(Fig.4d-2)42.420.215.710.6
表2  4种S31254不锈钢在950℃时效90 min后析出相的化学成分 (mass fraction / %)
图5  4种S31254不锈钢经950℃时效30 min后的动电位极化曲线和阻抗谱
SampleEcorr / VIcorr / A·cm-2Epit / V
0B-0.30767.4063 × 10-70.9791
50B-0.28065.6066 × 10-71.0264
50B-20Ce-0.23764.3216 × 10-71.0284
50B-50Ce-0.15061.0656 × 10-71.0319
表3  4种S31254不锈钢经950℃时效30 min后的动电位极化曲线拟合参数
图6  4种S31254不锈钢固溶后及在沸腾的硫酸-硫酸铁溶液中浸泡24 h后的形貌
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