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Laser Melting of High Thermal Conductivity Steel (HTCS) Surface

This paper presents a laser melting of high thermal conductivity steel (HTCS) dies for surface properties modification due to die failures during operations. Sample were cut from as-received die without any defect or crack. Melting process was conducted using Nd:YAG laser system with pulse mode at 5...

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Main Authors: Norhafzan, Bariman, S. N., Aqida, Fazliana, Fauzun
Format: Article
Language:English
Published: Trans Tech Publications 2017
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://umpir.ump.edu.my/id/eprint/19874/1/fkm-2017-aqida-%20Laser%20Melting%20of%20High%20Thermal%20Conductivity%20Steel1.pdf
http://umpir.ump.edu.my/id/eprint/19874/
https://www.scientific.net/MSF.890.380
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spelling my.ump.umpir.198742018-02-12T05:51:38Z http://umpir.ump.edu.my/id/eprint/19874/ Laser Melting of High Thermal Conductivity Steel (HTCS) Surface Norhafzan, Bariman S. N., Aqida Fazliana, Fauzun TJ Mechanical engineering and machinery This paper presents a laser melting of high thermal conductivity steel (HTCS) dies for surface properties modification due to die failures during operations. Sample were cut from as-received die without any defect or crack. Melting process was conducted using Nd:YAG laser system with pulse mode at 50 W average power. The laser beam was defocused to a spot size of 1 mm on the sample surface. Parameters controlled in this study were peak power of 800 and 1200 W, and pulse repetition frequency of 80 and 90 Hz. Metallographic study and chemical composition analysis were conducted using Hitachi TM3030Plus scanning electron microscope (SEM) and energy dispersive x-ray spectrometer (EDXS). Surface roughness was measured using Mitutoyo SURFTEST SJ-410 stylus profilometer. Hardness properties of the modified layer were characterized by Wilson Hardness tester at 100 N force. The metallographic study showed high porosity at partially melted zone (PMZ) area. From overall findings, laser processing parameter affected hardness properties and surface roughness of modified layer. Where the surface roughness value obtained is between 1.49 and 3.15 µm, while the hardness value is between 550.9 and 610.9 HV0.1. These findings are significant to parameters selection for hot stamping die surface repair and prolong its service. Trans Tech Publications 2017-03 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/19874/1/fkm-2017-aqida-%20Laser%20Melting%20of%20High%20Thermal%20Conductivity%20Steel1.pdf Norhafzan, Bariman and S. N., Aqida and Fazliana, Fauzun (2017) Laser Melting of High Thermal Conductivity Steel (HTCS) Surface. Materials Science Forum, 890. pp. 380-383. ISSN 1662-9752 https://www.scientific.net/MSF.890.380 10.4028/www.scientific.net/MSF.890.380
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Norhafzan, Bariman
S. N., Aqida
Fazliana, Fauzun
Laser Melting of High Thermal Conductivity Steel (HTCS) Surface
description This paper presents a laser melting of high thermal conductivity steel (HTCS) dies for surface properties modification due to die failures during operations. Sample were cut from as-received die without any defect or crack. Melting process was conducted using Nd:YAG laser system with pulse mode at 50 W average power. The laser beam was defocused to a spot size of 1 mm on the sample surface. Parameters controlled in this study were peak power of 800 and 1200 W, and pulse repetition frequency of 80 and 90 Hz. Metallographic study and chemical composition analysis were conducted using Hitachi TM3030Plus scanning electron microscope (SEM) and energy dispersive x-ray spectrometer (EDXS). Surface roughness was measured using Mitutoyo SURFTEST SJ-410 stylus profilometer. Hardness properties of the modified layer were characterized by Wilson Hardness tester at 100 N force. The metallographic study showed high porosity at partially melted zone (PMZ) area. From overall findings, laser processing parameter affected hardness properties and surface roughness of modified layer. Where the surface roughness value obtained is between 1.49 and 3.15 µm, while the hardness value is between 550.9 and 610.9 HV0.1. These findings are significant to parameters selection for hot stamping die surface repair and prolong its service.
format Article
author Norhafzan, Bariman
S. N., Aqida
Fazliana, Fauzun
author_facet Norhafzan, Bariman
S. N., Aqida
Fazliana, Fauzun
author_sort Norhafzan, Bariman
title Laser Melting of High Thermal Conductivity Steel (HTCS) Surface
title_short Laser Melting of High Thermal Conductivity Steel (HTCS) Surface
title_full Laser Melting of High Thermal Conductivity Steel (HTCS) Surface
title_fullStr Laser Melting of High Thermal Conductivity Steel (HTCS) Surface
title_full_unstemmed Laser Melting of High Thermal Conductivity Steel (HTCS) Surface
title_sort laser melting of high thermal conductivity steel (htcs) surface
publisher Trans Tech Publications
publishDate 2017
url http://umpir.ump.edu.my/id/eprint/19874/1/fkm-2017-aqida-%20Laser%20Melting%20of%20High%20Thermal%20Conductivity%20Steel1.pdf
http://umpir.ump.edu.my/id/eprint/19874/
https://www.scientific.net/MSF.890.380
_version_ 1643668749514964992
score 13.211869

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