| 离子渗氮温度对Fe-C-Cr-Ni-Mn-V沉淀硬化型奥氏体不锈钢渗层组织和性能的影响 |
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| 引用本文： | 周武,王敏,赵同新,卢军,杨旗.离子渗氮温度对Fe-C-Cr-Ni-Mn-V沉淀硬化型奥氏体不锈钢渗层组织和性能的影响[J].金属热处理,2022,47(11):147-151. |
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| 作者姓名： | 周武 王敏 赵同新 卢军 杨旗 |
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| 作者单位： | 1.上海第二工业大学 资源与环境工程学院, 上海 201209; 2.上海材料研究所, 上海 200437; 3.上海市工程材料应用与评价重点实验室, 上海 200437; 4.岛津企业管理(中国)有限公司 上海分部 分析中心, 上海 200233 |
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| 基金项目： | 上海市虹口区新兴产业重点项目(虹商ZDXM-2019-001) |
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| 摘 要： | 采用离子渗氮工艺对一种Fe-C-Cr-Ni-Mn-V沉淀硬化型奥氏体不锈钢进行表面改性处理。利用光学显微镜(OM)、X射线衍射(XRD)、电子探针显微分析仪(EPMA)和维氏硬度计对不同离子渗氮温度下渗层的组织和性能进行了研究。结果表明,Fe-C-Cr-Ni-Mn-V沉淀硬化型奥氏体不锈钢经430~520 ℃离子渗氮处理10 h后,试样表面均形成一层厚度均匀的渗氮层,表面硬度显著增大。随着离子渗氮温度的升高,渗层厚度增大,520 ℃渗氮时渗层厚度达到78 μm。当渗氮温度为430 ℃时,渗层表面主要由γN+CrN+γ′-Fe4N相组成;当渗氮温度升高至520 ℃时,渗层表面主要由γ′-Fe4N+CrN+ε-Fe2-3N相组成。在3种渗氮温度下,渗层中均有CrN析出,导致渗层耐蚀性低于基体组织。
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| 关 键 词： | 沉淀硬化奥氏体不锈钢 离子渗氮 温度 相结构 硬度 |
| 收稿时间： | 2022-06-17 |
Effect of plasma nitriding temperature on microstructure and properties of nitrided layer on Fe-C-Cr-Ni-Mn-V precipitation-hardened austenitic stainless steel |
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| Zhou Wu,Wang Min,Zhao Tongxin,Lu Jun,Yang Qi.Effect of plasma nitriding temperature on microstructure and properties of nitrided layer on Fe-C-Cr-Ni-Mn-V precipitation-hardened austenitic stainless steel[J].Heat Treatment of Metals,2022,47(11):147-151. |
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| Authors: | Zhou Wu Wang Min Zhao Tongxin Lu Jun Yang Qi |
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| Affiliation: | 1. School of Materials Science and Engineering, Shanghai Polytechnic University, Shanghai 201209, China; 2. Shanghai Research Institute of Materials, Shanghai 200437, China; 3. Shanghai Key Laboratory of Engineering Materials Application and Evaluation, Shanghai 200437, China; 4. Analytical Applications Center, Shanghai Branch, Shimadzu (China) Co., Ltd., Shanghai 200233, China |
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| Abstract: | The surface of a Fe-C-Cr-Ni-Mn-V precipitation-hardened austenitic stainless steel was modified by plasma nitriding. Microstructure and properties of the nitrided layer at different nitriding temperatures were investigated by means of optical microscope (OM),X-ray diffraction (XRD), electron probe microanalysis (EPMA) and Vickers hardness tester. The results show that nitrided layer with uniform thickness on the specimen surface is formed by plasma nitriding at temperatures ranging from 430 ℃ to 520 ℃ for 10 h, and the surface hardness is significantly improved. The thickness of the nitrided layer increases with the increase of nitriding temperature and reaches 78 μm at 520 ℃. The infiltration layer is composed of γN, CrN and γ′-Fe4N phases after nitriding at 430 ℃, and composed of γ′-Fe4N, CrN and ε-Fe2-3N phases when the nitriding temperature increases to 520 ℃. Precipitation of CrN is found in the infiltration layer at all the three nitriding temperatures, resulting in the poor corrosion resistance compared with that of the substrate. |
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| Keywords: | precipitation-hardened austenitic stainless steel plasma nitriding temperature phase structure hardness |
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