Optimization of pulsed Nd:YAG laser melting of gray cast iron at different spot sizes for enhanced surface properties

Zulhishamuddin, A. R.; Aqida, S. N.; Rahim, Erween Abd

doi:10.1063/1.4963420

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…The processing of grey cast iron samples [19] was performed on an Nd: YAG laser in pulsed mode, with an average power of 50 W, with different laser spot sizes of 1.0, 1.2, 1.4 and 1.7 mm. The controlled parameters were peak power, pulse repetition rate and travel speed.…”

Section: Introductionmentioning

confidence: 99%

Computational and experimental determination of parameters of laser hardening zones of cast iron

Biryukov,

Goryunov,

Kurin

2023

E3S Web Conf.

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The paper presents the results of metallographic studies and tribotechnical tests of samples of special cast iron of the "C" brand for passenger train brake pads. Regression equations for determining the depth and width of laser quenching zones were obtained using a full factorial experiment. The response surfaces of the system are constructed and the patterns of change are determined the size of the quenching zones depends on the processing modes. It is shown that the greatest influence on the depth and width of the hardening zones was exerted by the radiation power and the scanning speed of the beam. The use of transverse vibrations of the laser beam increased the productivity of the processing process. The microhardness in the zones of laser quenching from the liquid state was significantly higher than the zones of hardening from the solid state in all the studied processing modes. Tribotechnical tests were carried out according to the scheme "plane (wide side of a flat sample of special cast iron grade "C") – the annular surface of the sleeve of the counter-tile (wheel steel grade 2) with the use of semi-liquid lubricant "PUMA". The load and sliding speed varied discretely. The wear resistance of laser–hardened samples was 2.4 - 2.9 times higher than the base material, depending on the area of the hardened tracks. The friction coefficients paired with the wheel steel of the samples with laser hardening decreased slightly, which will allow the use of laser hardening for passenger train brake pads without changing their design.

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Section: Introductionmentioning

confidence: 99%

Computational and experimental determination of parameters of laser hardening zones of cast iron

Biryukov,

Goryunov,

Kurin

2023

E3S Web Conf.

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“…This model can predict relative temperature distribution and heating and cooling rates [4]. Some experimental works were done for LSG and laser surface melting (LSM) process on biomedical and automotive applications [5][6]. Analytical models for laser melting of ceramics tiles were developed to predict temperature distribution and depth of melt pool.…”

Section: Introductionmentioning

confidence: 99%

3D thermal model of laser surface glazing for H13 tool steel

Kabir

Yin

Naher

2017

AIP Conference Proceedings

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This is the accepted version of the paper.This version of the publication may differ from the final published version. Abstract. In this work a three dimensional (3D) finite element model of laser surface glazing (LSG) process has been developed. The purpose of the 3D thermal model of LSG was to achieve maximum accuracy towards the predicted outcome for optimizing the process. A cylindrical geometry of 10mm diameter and 1mm length was used in ANSYS 15 software. Temperature distribution, depth of modified zone and cooling rates were analysed from the thermal model. Parametric study was carried out varying the laser power from 200W-300W with constant beam diameter and residence time which were 0.2mm and 0.15ms respectively. The maximum surface temperature 2554K was obtained for power 300W and minimum surface temperature 1668K for power 200W. Heating and cooling rates increased with increasing laser power. The depth of the laser modified zone attained for 300W power was 37.5μm and for 200W power was 30μm. No molten zone was observed at 200W power. Maximum surface temperatures obtained from 3D model increased 4% than 2D model presented in author's previous work. In order to verify simulation results an analytical solution of temperature distribution for laser surface modification was used. The surface temperature after heating was calculated for similar laser parameters which is 1689K. The difference in maximum surface temperature is around 20.7K between analytical and numerical analysis of LSG for power 200W. Permanent repository link

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Effect of Heating Time on Hardness Properties of Laser Clad Gray Cast Iron Surface

Norhafzan

Aqida

Mifthal

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Optimization of pulsed Nd:YAG laser melting of gray cast iron at different spot sizes for enhanced surface properties

Cited by 4 publications

References 12 publications

Computational and experimental determination of parameters of laser hardening zones of cast iron

Computational and experimental determination of parameters of laser hardening zones of cast iron

3D thermal model of laser surface glazing for H13 tool steel

Effect of Heating Time on Hardness Properties of Laser Clad Gray Cast Iron Surface

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