SEM and TEM microstructural investigation of high-speed tool steel after laser melting

被引：40
|
作者：
Kac, S [1 ]
Kusinski, J [1 ]
机构：
[1] Stanislaw Staszic Univ Min & Met, Fac Met & Mat Sci, PL-30059 Krakow, Poland
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2003年 / 81卷 / 2-3期
关键词：
tool steel; laser melting; rapid solidification;
D O I：
10.1016/S0254-0584(03)00062-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure of a continuous CO2 laser-melted high-speed steel, namely M2, has been studied. The formation of the microstructure under rapid solidification conditions is described by means of scanning electron microscopy, transmission electron microscopy and energy-dispersive X-ray spectroscopy. A very fine dendritic structure is characteristic for the microstructure formed under such rapid solidification conditions like laser melting. This structure generally consists of fine dendrites of austenite crossed by a very fine carbide network or the eutectic without the primary large carbides. The structure obtained in the surface layer after laser melting permits to get a high level of hardness and shows an improved wear resistance. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：510 / 512
页数：3
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