| 降碳增氮对马氏体不锈钢淬火组织和性能的影响 |
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| 引用本文： | 纪显彬,李照国,魏海霞,钱张信.降碳增氮对马氏体不锈钢淬火组织和性能的影响[J].金属热处理,2023,48(3):259-262. |
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| 作者姓名： | 纪显彬 李照国 魏海霞 钱张信 |
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| 作者单位： | 酒泉钢铁(集团)有限责任公司, 甘肃 嘉峪关 735100 |
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| 摘 要： | 采用激光扫描共聚焦显微镜、扫描电镜、硬度计、X射线衍射仪和盐雾试验机，研究了不同温度(950、1000、1050、1100℃)下30Cr13和30Cr14N钢在马弗炉中空淬后，氮含量对30Cr13钢显微组织、碳化物、硬度和耐蚀性能的影响。结果表明，淬火温度相同，30Cr14N钢比30Cr13钢硬度高、碳化物少和耐蚀性能好。氮不仅影响马氏体不锈钢的显微组织及硬度，还能通过降碳增氮，避免因碳化物过多的析出而引起的晶间腐蚀，而FeNiN的析出不会像Cr23C6析出造成显著的晶间腐蚀。因此，降碳增氮是改善马氏体不锈钢组织和性能的一种有效途径。
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| 关 键 词： | 马氏体不锈钢30Cr13 淬火温度 氮含量 硬度 耐蚀性能 |
| 收稿时间： | 2022-11-01 |
Effect of decreasing carbon and increasing nitrogen on microstructure and properties of quenched martensitic stainless steel |
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| Ji Xianbin,Li Zhaoguo,Wei Haixia,Qian Zhangxin.Effect of decreasing carbon and increasing nitrogen on microstructure and properties of quenched martensitic stainless steel[J].Heat Treatment of Metals,2023,48(3):259-262. |
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| Authors: | Ji Xianbin Li Zhaoguo Wei Haixia Qian Zhangxin |
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| Affiliation: | Jiuquan Iron & Steel (Group) Co., Ltd., Jiayuguan Gansu 735100, China |
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| Abstract: | First air quenching 30Cr13 and 30Cr14N steels respectively at different temperatures (950, 1000, 1050, 1100 ℃) in muffle furnace, then the effect of nitrogen content on microstructure, carbides, hardness and corrosion resistance of the 30Cr13 steel was investigated by using laser scanning confocal microscope, scanning electron microscope, hardness tester, X-ray diffractometer, and salt spray tester. The results show that when quenched at the same temperature, the 30Cr14N steel has higher hardness, less carbide and better corrosion resistance than that of the 30Cr13 steel. Nitrogen not only affects the microstructure and hardness of the tested steel, but also avoid the intergranular corrosion caused by excessive carbide precipitation through decreasing carbon and increasing nitrogen, because FeNiN precipitation does not cause significant intergranular corrosion as Cr23C6 precipitation. Therefore, decreasing carbon and increasing nitrogen is an effective way to improve the microstructure and properties of martensitic stainless steel. |
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| Keywords: | martensite stainless steel 30Cr13 quenching temperature nitrogen content hardness corrosion resistance |
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