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Titolo:
Effect of laser surface hardening on En18 (AISI 5135) steel
Autore:
Selvan, JS; Subramanian, K; Nath, AK;
Indirizzi:
Anna Univ, Dept Phys, Chennai 600025, India Anna Univ Chennai India 600025 na Univ, Dept Phys, Chennai 600025, India Ctr Adv Technol, Indore 452013, India Ctr Adv Technol Indore India 452013 tr Adv Technol, Indore 452013, India
Titolo Testata:
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
fascicolo: 1-3, volume: 91, anno: 1999,
pagine: 29 - 36
SICI:
0924-0136(19990630)91:1-3<29:EOLSHO>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRANSFORMATION;
Keywords:
laser hardening; martensite; cooling rate; hardness; phase transformation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Subramanian, K Anna Univ, Dept Phys, Chennai 600025, India Anna Univ Chennai India 600025 hys, Chennai 600025, India
Citazione:
J.S. Selvan et al., "Effect of laser surface hardening on En18 (AISI 5135) steel", J MATER PR, 91(1-3), 1999, pp. 29-36

Abstract

Laser surface hardening is an effective technique used to improve the tribological properties and also to increase the service life of automobile components such as camshafts, crankshafts, lorry brake drums and gears. High power CO, lasers and Nd-YAG lasers are employed for localized hardening of materials and hence are of potential application in the automobile industries. All steel surfaces can be hardened with high power laser sources, the degree of hardenability and fineness in microstructure obtained depending on the laser processing variables and on the absorption coatings employed. In this investigation, the microstructrual features occurring in CO, laser hardened En18 steel are discussed with the use of optical microscopic and scanning electron microscopic analysis. Moreover, the correlation between the surface temperature and cooling rate on the resulting hardness is explained. Theoretical thermal profile studies are made and their effect on the coupling coefficient values, hardness and the microstructural changes observed are discussed. The effect of laser hardening on wear resistance is described. (C) 1999 Elsevier Science S.A. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 19:55:32