Thermal Simulation of Laser Surface Modification of H13 Die Steel

Aqida, Syed Ahmad Syarifah Nur; Naher, Sumsun; Brabazon, Dermot

doi:10.4028/www.scientific.net/kem.504-506.351

Cited by 10 publications

(5 citation statements)

References 23 publications

(25 reference statements)

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“…As noted previously, for the processing conditions used in this work, there is little difference between U and Vc, and either can be used in this model without significant error. This model was previously developed and tested by Issa et al [32] and Aqida et al [33].…”

Section: Numerical Modelling Of Laser Generated Thermal Profilementioning

confidence: 99%

Methodology of laser processing for precise control of surface micro-topology

Obeidi

McCarthy

Brabazon

2016

Surface and Coatings Technology

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Laser surface texturing of materials potentially offers precise control of surface structure and mechanical properties. This has a wide range of applications such as control of frictional forces, control of bond strength in interference fit joints, and production of antifouling surfaces. To achieve such texturing in a well-defined, useful manner, precise control of the applied laser processing parameters over a sizeable surface area is required. This paper presents the development of a method for creating highly repeatable and predetermined moiré textured patterns on metallic samples via laser processing. While the method developed is broadly applicable to various materials and laser systems, in the example detailed here the surfaces of cylindrical stainless steel samples were processed with a pulsed CO2 laser. The resulting modified surfaces contained texture geometries with pre-definable peak-to-peak widths, valleyto-peak heights, and texture directions. The method of achieving this theoretically and experimentally is detailed in this paper. The relationship between the laser processing parameters and resulting diameter increase was confirmed via Design of Experiment response surface methodology. Precise control of the laser textured cylindrical surface outer diameter and texture pattern are key factors in determining the potential suitability of this process for application to the production of interference fit fasteners. The effects of the laser processing parameters and topologies of the resulting re-solidified metal profile on the surfaces were assessed in detail with a focus on this application.

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Section: Numerical Modelling Of Laser Generated Thermal Profilementioning

confidence: 99%

Methodology of laser processing for precise control of surface micro-topology

Obeidi

McCarthy

Brabazon

2016

Surface and Coatings Technology

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“…Laser surface modification is widely used as a remanufacturing process, especially for repairing cracks in mold and dies surface. It produces new properties on the surface of substrate which improves toughness, hardness and corrosion thus reduce wear resistance and thermal stress [1,2]. Laser surface processing provides a unique tool for the high precision surface modification with micron size heat source.…”

Section: Introductionmentioning

confidence: 99%

Laser Melting of High Thermal Conductivity Steel (HTCS) Surface

Norhafzan

Aqida

Fauzun

2017

MSF

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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.

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“…Over the past few years, laser surface treatment has been chosen as one way to overcome premature failure in semi-solid casting by developing amorphous layer on die surface [1]. Rapid development in surface engineering field leads to utilisation of advanced heat source such as plasma, laser, ion, and electron [2]. Tool and die industries pay attention to the technology of laser surface treatment due to its precision of operation, short processing time and localized treatment effects [3].…”

Section: Introductionmentioning

confidence: 99%

Laser Surface Modification of AISI 1025 Low Carbon Steel Using Pulsed Nd:YAG Laser for Enhance Surface Properties

Fauzun

Aqida

Wahab

2013

KEM

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This paper presents laser surface modification of AISI 1025 low carbon steel for enhance surface hardness properties. An Nd:YAG laser system with pulse mode was used in order to modify 10mm thick plate surface. Three controlled parameters were laser power, pulse duration and overlap percentage which ranged from 100W to 200W, 0.4 to 1.0ms and 50% to 90% respectively. The treated samples was characterised for metallographic study and hardness. Metallographic study was conducted using optical microscope for laser modified layer thickness and grain size. Hardness properties were measured using Vickers indenter. The result show that hardness of laser treated area increased due to fine grain size produced in the laser modified layer. The overlapping rates increase significantly with decreasing laser scanning speed. These findings are important high wear applications.

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Thermal Simulation of Laser Surface Modification of H13 Die Steel

Cited by 10 publications

References 23 publications

Methodology of laser processing for precise control of surface micro-topology

Methodology of laser processing for precise control of surface micro-topology

Laser Melting of High Thermal Conductivity Steel (HTCS) Surface

Laser Surface Modification of AISI 1025 Low Carbon Steel Using Pulsed Nd:YAG Laser for Enhance Surface Properties

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