| 固体渗铬层组织结构及性能稳定性研究 |
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| 引用本文： | 韦春贝,林松盛,代明江,石倩,苏一凡,唐鹏. 固体渗铬层组织结构及性能稳定性研究[J]. 稀有金属材料与工程, 2021, 50(5): 1706-1712 |
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| 作者姓名： | 韦春贝 林松盛 代明江 石倩 苏一凡 唐鹏 |
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| 作者单位： | 广东省新材料研究所 现代材料表面工程技术国家工程实验室 广东省现代表面工程技术重点实验室,广东省新材料研究所 现代材料表面工程技术国家工程实验室 广东省现代表面工程技术重点实验室,广东省新材料研究所 现代材料表面工程技术国家工程实验室 广东省现代表面工程技术重点实验室,广东省新材料研究所 现代材料表面工程技术国家工程实验室 广东省现代表面工程技术重点实验室,广东省新材料研究所 现代材料表面工程技术国家工程实验室 广东省现代表面工程技术重点实验室,广东省新材料研究所 现代材料表面工程技术国家工程实验室 广东省现代表面工程技术重点实验室 |
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| 基金项目： | 广东特支计划资助（2019BT02C629）;广东省科学院创新能力建设项目(2018GDASCX-0111);广东省重点领域研发计划（2020B010184001） |
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| 摘 要： | 采用固体粉末法在GCr15钢表面进行渗铬处理,研究了不同渗铬时间下渗层的结构和性能,并研究了自然时效对渗层结构、力学性能的影响.采用扫描电子显微镜及EDS能谱仪、X射线衍射仪研究了时效前后渗层组织结构的变化,采用显微硬度仪、纳米压痕仪、洛氏硬度计分析了时效前后渗层表面硬度、截面微区硬度、与基体的结合强度.结果表明:渗层...
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| 关 键 词： | 固体渗铬 自然时效 相结构 硬度 结合强度 |
| 收稿时间： | 2020-04-13 |
| 修稿时间： | 2020-05-14 |
Structure and performance stability of chromized coating by pack cementation |
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| Chunbei Wei,Songsheng Lin,Mingjiang Dai,Qian Shi,Yifan Su and Peng Tang. Structure and performance stability of chromized coating by pack cementation[J]. Rare Metal Materials and Engineering, 2021, 50(5): 1706-1712 |
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| Authors: | Chunbei Wei Songsheng Lin Mingjiang Dai Qian Shi Yifan Su Peng Tang |
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| Affiliation: | Guangdong Institute of New Materials,National engineering laboratory for Modern Materials Surface Engineering Technology,The key Lab of Guangdong for Modern Surface Engineering Technology,Guangdong Institute of New Materials,National engineering laboratory for Modern Materials Surface Engineering Technology,The key Lab of Guangdong for Modern Surface Engineering Technology,Guangdong Institute of New Materials,National engineering laboratory for Modern Materials Surface Engineering Technology,The key Lab of Guangdong for Modern Surface Engineering Technology,Guangdong Institute of New Materials,National engineering laboratory for Modern Materials Surface Engineering Technology,The key Lab of Guangdong for Modern Surface Engineering Technology,Guangdong Institute of New Materials,National engineering laboratory for Modern Materials Surface Engineering Technology,The key Lab of Guangdong for Modern Surface Engineering Technology,Guangdong Institute of New Materials,National engineering laboratory for Modern Materials Surface Engineering Technology,The key Lab of Guangdong for Modern Surface Engineering Technology |
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| Abstract: | Chromized coatings were fabricated using a conventional pack-cementation method. Effect of chromizing time, as well as natural ageing on the structure and performance was investigated. The phases and microstructure were characterized by scanning electron microscopy (SEM) with EDS and X-ray diffraction (XRD). The microhardness of the surface, the nanohardness of cross-section, the adhesion strength of the coatings were characterized by Vickers microhardness tester, nano-indenter and Rockwell-C tester. The results show that the chromized coatings were composed of Cr2N, (Cr,Fe)23C6 and (Cr,Fe)7C3. In the top surface, the discontinous Cr2N crystal grains distributed in the loose chromium carbides. The Cr2N crystal grains growth larger as the chromizing time increased. In the sublayer, the phase was composed of chromium carbides. The gradient structure was formed in the chromized coatings with Cr content decreased from surface to substrate and the contrary trend for Fe content. The microhardness of the surface was between 1492HV0.05~1698HV0.05 and it decreased slightly after 1 year natural ageing. The nanohardness reduced with Cr content decreasing in cross-section of chromized coatings. The Rockwell-C test results show that there were some radial cracks and spalls around the indentation crater. However, only radial cracks were presented around the indentation craters after 1 year natural ageing, indicated the improvement of adhesion strength of the coatings to substrate. |
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| Keywords: | pack-cementation chromizing natural ageing phase structure hardness adhesion strength |
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