EXPERIMENTAL STUDIES ON THE MICROSTRUCTURE AND HARDNESS OF LASER TRANSFORMATION HARDENING OF LOW ALLOY STEEL-Reference-Cited by-同舟云学术

EXPERIMENTAL STUDIES ON THE MICROSTRUCTURE AND HARDNESS OF LASER TRANSFORMATION HARDENING OF LOW ALLOY STEEL

Published:2012-09 Issue:3 Volume:36 Page:241-258
ISSN:0315-8977
Container-title:Transactions of the Canadian Society for Mechanical Engineering
language:en
Short-container-title:Transactions of the Canadian Society for Mechanical Engineering

Author:

Babu Purushothaman Dinesh¹,Buvanashekaran Gengusamynaidu²,Balasubramanian Karupuudaiyar R.¹

Affiliation:

1. Department of Mechanical Engineering, National Institute of Technology, Tiruchirappalli, TN, India

2. Welding Research Institute, Bharat Heavy Electricals Limited, Tiruchirappalli, TN, India

Abstract

An experimental investigation with Nd:YAG laser system was carried out to study the effects of laser hardening process parameters on the microstructure and hardness during laser hardening of EN25 steel. The laser beam is allowed to scan on the surface of the work piece by varying the laser beam power (750–1250 W) and travel speed (500–1000 mm/min) of the work table. The microstructural features of the laser hardened EN25 steel were analysed using optical microscope. The microstructure of the surface layer was found to consist of plate martensite. A substantial increase in surface hardness was achieved, by a factor of 2 times the base material hardness.

Publisher

Canadian Science Publishing

Subject

Mechanical Engineering

Link

http://www.nrcresearchpress.com/doi/pdf/10.1139/tcsme-2012-0018

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