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

页码：231 / 236

页数：6

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