Study on microstructure and high temperature oxidation resistance of laser cladding coating prepared by Ni60-TiO2-B4C-Al powders

被引：0
|
作者：
Zhou Fang [1 ]
Yang Huiyao [1 ]
He Lianghua [1 ]
机构：
[1] Guizhou Univ, Sch Met & Mat, Guiyang 550025, Guizhou, Peoples R China
来源：
MATERIALS SCIENCE, CIVIL ENGINEERING AND ARCHITECTURE SCIENCE, MECHANICAL ENGINEERING AND MANUFACTURING TECHNOLOGY, PTS 1 AND 2 | 2014年 / 488-489卷
关键词：
laser cladding; coating; microstructure; oxidation resistance; ALLOY; BEHAVIOR;
D O I：
10.4028/www.scientific.net/AMM.488-489.201
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The composite coating with TiC-TiB2-Ni3Al was fabricated on 45 steel by laser cladding. The microstructure and high temperature oxidation resistance of coating were investigated. The results show that, the main phases of coating are alpha-Fe, TiC, TiB2, Ni3Al, (Fe,Cr)(7)C-3 and Al2O3. The interface of coating and substrate material is metallurgical bond; the coating is uniform and dense without cracks and pores. The fine particles of TiC and TiB2 disperse uniformly in the coating. After oxidized at 1000 degrees C for 60 h, the oxidation film is consisted of spherical oxides of Al, Ti and Cr, they can hinder the diffusion between oxygen and metal atoms and make the coating possess outstanding high temperature oxidation resistance.
引用
收藏
页码：201 / 204
页数：4
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