UM  > 科技學院  > 機電工程系
Laser Surface Modification of Various Tool Steels for Improving Hardness and Corrosion Resistance
C.T. Kwok1; F.T. Cheng2; H.C. Man3; K.I. Leong1
2008-08-18
Source PublicationKey Engineering Materials
ISSN1013-9826
Volume384Pages:125-155
Abstract

Laser surface modification of nine tool steels, namely, plastics mold steels (PMSs), high-speed steels (HSSs) and cold/hot-work steels (CHWSs), was achieved by means of a CW Nd:YAG laser. The microstructure and the phases present in the surface of the specimens were analyzed by optical microscopy, scanning-electron microscopy and X-ray diffractometry. The surface hardness of the specimens was measured using a Vickers microhardness tester. The corrosion characteristics of the laser surface-melted steels in 3.5 wt% NaCl solution at 25°C were studied by potentiodynamic polarization technique. The microstructures of the surface of the steels were changed completely after laser surface melting. Some steels showed improved corrosion resistance compared with the conventionally hardened specimens due to dissolution of the alloying elements in solid solution. The hardness and corrosion characteristics of all the laser surface-melted specimens are strongly dependent on the amount of passivating elements in solid solution and also on the morphology of the re-precipitated carbides. Both these factors depend on the laser processing parameters and the substrate compositions.

KeywordHardness And Corrosion Laser Surface Modification Tool Steels
DOIhttps://doi.org/10.4028/www.scientific.net/KEM.384.125
URLView the original
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000268428800006
PublisherTRANS TECH PUBLICATIONS LTD, KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
Fulltext Access
Citation statistics
Cited Times [WOS]:3   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Affiliation1.Dept. of Electromechanical Engineering, University of Macau, Taipa, Macau, PR China
2.Dept. of Applied Physics
3.Dept. of Industrial & Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, PR China
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
C.T. Kwok,F.T. Cheng,H.C. Man,et al. Laser Surface Modification of Various Tool Steels for Improving Hardness and Corrosion Resistance[J]. Key Engineering Materials,2008,384:125-155.
APA C.T. Kwok,F.T. Cheng,H.C. Man,&K.I. Leong.(2008).Laser Surface Modification of Various Tool Steels for Improving Hardness and Corrosion Resistance.Key Engineering Materials,384,125-155.
MLA C.T. Kwok,et al."Laser Surface Modification of Various Tool Steels for Improving Hardness and Corrosion Resistance".Key Engineering Materials 384(2008):125-155.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[C.T. Kwok]'s Articles
[F.T. Cheng]'s Articles
[H.C. Man]'s Articles
Baidu academic
Similar articles in Baidu academic
[C.T. Kwok]'s Articles
[F.T. Cheng]'s Articles
[H.C. Man]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[C.T. Kwok]'s Articles
[F.T. Cheng]'s Articles
[H.C. Man]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.