等离子熔覆制备Fe<sub>3</sub>Al金属间化合物的组织结构

朱冬妹; 王惜宝

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等离子熔覆制备Fe₃Al金属间化合物的组织结构
朱冬妹^1,2, 王惜宝²
1.北京星航机电设备厂, 北京 100074;2.天津大学材料科学与工程学院, 天津 300072

摘要:

为了提高钢铁表面的抗高温腐蚀性能,应用电弧喷涂和等离子弧熔覆方法在碳钢表面制备Fe-Al金属间化合物涂层。通过对熔覆层及其与钢基体界面的组织结构分析,认为该方法可以在钢基表面获得致密、无夹杂的铁铝金属间化合物层,合金层与基体间完全冶金结合;熔覆层主要由Fe₃Al,FeAl和α-Fe相构成。在试验条件下所获得的铁铝合金层,其最高显微硬度可达到514HV。

关键词: 等离子熔覆 Fe₃Al 金属间化合物

DOI：

分类号:

基金项目:国家自然科学基金资助项目(50574068)

Mcrostrueture of Fe₃A₁ intermetallic compound produced by plasma cladding

ZHU Dongmei^1,2, WANG Xibao²

1.Beijing Xinghang Mechanical-Electric Equipment Plant, Beijing 100074, China;2.School of Material Science and Engineering, Tianjin Univetsity, Tianjin 300072, China

Abstract:

Arc spraying and plasma cladding process was used to prepare the aluminum composite coating.The microstructure and phase structures of the clad alloy layer and the interface of alloy layer and steel matrix composites were analyzed.The results show that the tight alloy layer without pore and inclusion is obtained, and the coating and the steel are metallurgically compacted.The clad alloy layer consists of phase Fe₃Al, FeAl, α-Fe and Al₂O₃.Microhardness of the clad alloying layer will be 514 HV.

Key words: plasma cladding Fe₃Al intermetallic compound