SELECTIVE-AREA CARBURIZING OF LOW-CARBON STEEL USING AN ND-YAG LASER

被引：16
|
作者：
TAYAL, M
MUKHERJEE, K
机构：
[1] Department of Materials Science and Mechanics, Michigan State University, East Lansing
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1994年 / 174卷 / 02期
关键词：
D O I：
10.1016/0921-5093(94)91093-6
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Selective area laser carburizing of low carbon steel can be performed faster and without any precarburizing treatment. The added advantage of laser carburizing is rapid cooling, which leads to a fine microstructure and high hardness. AISI 1018 steel was selectively carburized using a 400 watt Nd:YAG laser. A maximum hardness of about 1050 Hv was obtained in laser carburized samples, which is comparatively higher than that obtained by conventional carburizing techniques. A wide range of microstructures were achieved under different processing conditions of laser carburizing. The most desirable microstructure was found to be a mixture of eutectic (alpha(Fe) + Fe3C) and austenite. Such composite microstructure is ideal for wear-resistant coating, comprising a hard phase (eutectic) and a soft phase (austenite).
引用
收藏
页码：231 / 236
页数：6
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