| 等离子熔覆铁基涂层组织结构及热影响区特点 |
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| 引用本文： | 张丽民,孙冬柏,李惠琪,刘邦武.等离子熔覆铁基涂层组织结构及热影响区特点[J].北京科技大学学报,2007,29(5):490-493. |
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| 作者姓名： | 张丽民 孙冬柏 李惠琪 刘邦武 |
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| 作者单位： | 1. 北京科技大学腐蚀与防护中心,北京,100083
2. 山东科技大学材料科学与工程学院,青岛,266510 |
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| 摘 要： | 采用等离子束作为热源,在16Mn钢上熔覆一层铁基合金涂层.分析了涂层的组织结构;并通过对等离子熔覆热循环的特点和冶金过程的探讨,着重对钢基体的热影响区进行了测试分析;将热影响区划分为过热区、完全相变区和不完全相变区.过热区显微组织粗大,有魏氏体产生,硬度下降;完全相变区晶粒细化,硬度较高;不完全相变区组织只有部分发生转变,晶粒大小不均匀.过热区魏氏体组织的产生,使热影响区有脆化的倾向.
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| 关 键 词： | 16Mn钢 等离子熔覆 涂层 热影响区 组织结构 等离子束 熔覆 铁基合金涂层 涂层组织结构 热影响区 zone characteristics plasma cladding coating 倾向 脆化 均匀 晶粒大小 转变 发生 晶粒细化 硬度 魏氏体 显微组织 不完全相变 |
| 修稿时间： | 2006-02-122006-09-10 |
Microstructure of the Fe-based coating by plasma cladding and characteristics of its heat-affected zone |
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| ZHANG Limin,SUN Dongbai,LI Huiqi,LIU Bangwu.Microstructure of the Fe-based coating by plasma cladding and characteristics of its heat-affected zone[J].Journal of University of Science and Technology Beijing,2007,29(5):490-493. |
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| Authors: | ZHANG Limin SUN Dongbai LI Huiqi LIU Bangwu |
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| Institution: | 1. Beijing Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China; 2. Department of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, China |
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| Abstract: | With plasma as heat source, Fe-based alloy powder was cladded on the surface of 16Mn steel and the microstructure and phases of the clad coating were analyzed. The thermal cycle characteristics of plasma cladding and the cladding process were discussed. The heat - affected zone was studied and divided into three zones, i.e., overheated zone, perfect phase transformation zone and imperfect phase transformation zone. In the overheated zone, the microstructure was coarse, Widmanstaten structure generated and the hardness fell down. In the perfect phase transformation zone, the microstructure was refined, and hardness was higher. In the imperfect phase transformation zone, part phase transformation generated, and the microstructure was nonhomogeneous. The Widmanstaten structure in the overheated zone made the heat-affected zone brittle. |
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| Keywords: | 16Mn steel plasma cladding coating heat-affected zone microstructure |
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