| Si对高熵合金涂层组织和高温抗氧化性能的影响 |
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| 引用本文： | 马植甄,朱佳浩,张晖. Si对高熵合金涂层组织和高温抗氧化性能的影响[J]. 金属热处理, 2021, 46(8): 46-50. DOI: 10.13251/j.issn.0254-6051.2021.08.009 |
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| 作者姓名： | 马植甄 朱佳浩 张晖 |
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| 作者单位： | 1.上海梅山钢铁股份有限公司 技术中心, 江苏 南京 210039;2.安徽工业大学 材料科学与工程学院, 安徽 马鞍山 243002 |
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| 基金项目： | 国家自然科学基金(51971001) |
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| 摘 要： | 研究了Si含量对窄带/宽带激光熔覆NiCoFeCrSixAlCuTiMoB0.4(x=1.0,0.5)高熵合金涂层组织、相结构及高温抗氧化性能的影响.结果表明:窄带涂层组织为树枝晶,主要相结构为BCC固溶体.宽带涂层为较粗大的树枝晶,相结构由BCC固溶体和存在于枝晶间的B(Fe,Si)3、Cr2 B少量第二相组成,且S...
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| 关 键 词： | 激光熔覆 高熵合金 组织 氧化层 |
| 收稿时间： | 2021-04-01 |
Effect of Si on microstructure and high temperature oxidation resistance of high-entropy alloy coatings |
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| Ma Zhizhen,Zhu Jiahao,Zhang Hui. Effect of Si on microstructure and high temperature oxidation resistance of high-entropy alloy coatings[J]. Heat Treatment of Metals, 2021, 46(8): 46-50. DOI: 10.13251/j.issn.0254-6051.2021.08.009 |
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| Authors: | Ma Zhizhen Zhu Jiahao Zhang Hui |
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| Affiliation: | 1. Technology Center, Shanghai Meishan Iron & Steel Co., Ltd., Nanjing Jiangsu 210039, China;2. School of Materials Science and Engineering, Anhui University of Technology, Ma'anshan Anhui 243002, China |
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| Abstract: | Effect of Si content on microstructure, phase structure and high temperature oxidation resistance of the narrowband/broadband laser clad NiCoFeCrSixAlCuTiMoB0.4 (x=1.0, 0.5) high-entropy alloy coatings was studied. The results show that the narrowband clad coating is mainly composed of simple BCC solid solution with dendritic microstructure. In the broadband coating, the phases transform to BCC solid solution with a small amount of B(Fe,Si)3 and Cr2B precipitates which are between dendrites, and the content of B(Fe,Si)3 reduces with the decrease of Si content. After oxidizing at 800 ℃ for 50 h, the oxidation scale of the broadband clad coating is mainly composed of Cr-rich outer oxide layer and Al-rich inner oxide layer, and the increase of Si content improves the high temperature oxidation resistance of the coating, especially significantly reduces the thickness of internal oxide layer. |
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| Keywords: | laser cladding high-entropy alloy microstructure oxide layer |
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