Microstructure and Properties of Roller Surface Alloyed by Laser

被引：0
|
作者：
Feng Liang [1 ]
Liu Qi-bin [1 ]
机构：
[1] Guizhou Univ, Coll Mat & Met, Guiyang 550003, Peoples R China
来源：
MATERIALS PROCESSING TECHNOLOGY, PTS 1-3 | 2012年 / 418-420卷
关键词：
Metallurgical roller; Laser alloying; Microstructure; Properties;
D O I：
10.4028/www.scientific.net/AMR.418-420.1808
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
To improve the service performance of roller. The surface of roller was alloyed by a 5kW CO2 laser. The Microstructure, hardness and wear resistance were investigated by means of OM, XRD, Micro-hardness Testing Machine and MMS-2A screen display friction tester. The experimental results indicate that excellent metallurgical bonding is obtained between alloying layer and substrate, the main microstructure of laser alloying coating is composed of phases such as gamma-Fe, Fe(Ni,Cr), (Fe,Cr)(7)C-3, MoC, Fe2MoC, WC and SiC etc. The strengthening mode is particle-reinforced mechanism. The corrosion resistance of connection zone is better than that of alloying zone. The average of microhardness value is as high as 718 HV, which is more two times than that of substrate, and the average of wear resistance value of alloying layer is approximately three times larger than that of substrate.
引用
收藏
页码：1808 / 1811
页数：4
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