Investigation on laser cladding of MoSi<sub>2</sub> powder on steel

Laiqi Zhang; Guangnan Chen; Zuqing Sun

Volume 12 Issue 5

Oct. 2005

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文章导航 > 矿物冶金与材料学报（英文） > 2005 > 12(5): 436-439

Laiqi Zhang, Guangnan Chen, and Zuqing Sun, Investigation on laser cladding of MoSi₂ powder on steel, J. Univ. Sci. Technol. Beijing, 12(2005), No. 5, pp. 436-439.

Cite this article as:

Laiqi Zhang, Guangnan Chen, and Zuqing Sun, Investigation on laser cladding of MoSi₂ powder on steel, J. Univ. Sci. Technol. Beijing, 12(2005), No. 5, pp. 436-439.

Laiqi Zhang, Guangnan Chen, and Zuqing Sun, Investigation on laser cladding of MoSi2 powder on steel, J. Univ. Sci. Technol. Beijing, 12(2005), No. 5, pp. 436-439.

Citation:

Laiqi Zhang, Guangnan Chen, and Zuqing Sun, Investigation on laser cladding of MoSi₂ powder on steel, J. Univ. Sci. Technol. Beijing, 12(2005), No. 5, pp. 436-439.

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Materials

Investigation on laser cladding of MoSi₂ powder on steel

State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China

通讯作者:
Laiqi Zhang E-mail: zhanglq@skl.ustb.edu.cn

中文摘要

The feasibility of the fabrication of coatings for elevated-temperature structural applications by laser cladding MoSi₂ powder on steel was investigated. A dense and crack-free fine coating, well-bonded with the substrate has been obtained by this technique. This coating consists of FeMoSi, Fe₂Si and a small amount of Mo₅Si₃ due to dilution of the substrate in the coating. The microstructure of the coating is characterized of typical fine dendrites. The dendrites are composed of FeMoSi primary phase, and the interdendritic areas are two eutectic phases of FeMoSi and Fe₂Si. The hardness of the coating reaches 845 Hv_0.5, 3.7 times larger than that of the steel substrate (180 Hv_0.5).

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Materials

Investigation on laser cladding of MoSi₂ powder on steel

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Abstract

Abstract

The feasibility of the fabrication of coatings for elevated-temperature structural applications by laser cladding MoSi₂ powder on steel was investigated. A dense and crack-free fine coating, well-bonded with the substrate has been obtained by this technique. This coating consists of FeMoSi, Fe₂Si and a small amount of Mo₅Si₃ due to dilution of the substrate in the coating. The microstructure of the coating is characterized of typical fine dendrites. The dendrites are composed of FeMoSi primary phase, and the interdendritic areas are two eutectic phases of FeMoSi and Fe₂Si. The hardness of the coating reaches 845 Hv_0.5, 3.7 times larger than that of the steel substrate (180 Hv_0.5).
- laser cladding;
- molybdenum silicide powder;
- coating;
- microstructure