Laser surface engineering of steel for hard refractory ceramic composite coating

被引：81
|
作者：
Agarwal, A [1 ]
Dahotre, NB [1 ]
机构：
[1] Univ Tennessee, Inst Space, Ctr Laser Applicat, Dept Mat Sci & Engn, Tullahoma, TN 37388 USA
来源：
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 1999年 / 17卷 / 04期
关键词：
laser surface engineering; steel; ceramic composite coating;
D O I：
10.1016/S0263-4368(98)00063-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Laser surface modification technique is applied to deposit ultrahard ceramic (TiB(2)) coating on 1010 steel. A uniform, continuous and crack free coating with a metallurgically sound interface is obtained. Coating is "composite" in nature comprising TiB(2) particles and Fe in the laser melt zone. Polygonal and needle shaped boride particles are uniformly distributed in the laser melted zone. The interfacial microstructure consists of cellular dendrites and fine equiaxed dendrites. Metastable phase(s) such as Fe(x)B(y) and Ti(m)B(n) are also observed which is a characteristic feature of non-equilibrium synthesis by laser energy. Laser melt zone has a high hardness. However, hardness is not uniform in the layer. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：283 / 293
页数：11
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