Cladding of WC–12 Co on low carbon steel using a pulsed Nd:YAG laser

Based on the bead on plate test and the effects of heat input on weld penetration, the equivalence between 2 kW CW (Continuous Wave) Nd:YAG laser power and pulsed GMA(Gas Metal Arc) power and the effect of welding speed on their equivalent ratios in welding carbon steel and Al alloy were studied. The studied results show that 9.8 kW pulsed GMA power is needed to reach the same weld penetration depth with 2 kW CW Nd:YAG laser power for welding of low carbon steel at v=1.2 m/min; for Al alloy, it is 3.92 kW pulsed GMA power. The equivalent ratios of 2 kW Nd:YAG laser power and pulsed GMA power are 4.9~6.4 and 1.85~2.1 times at different welding speed for low carbon steel and Al alloy, respectively. But their equivalent ratios have different variations with welding speed; at which the equivalent ratio of low carbon steel increases with welding speed and that of Al alloy decreases. The studied results offer the experimental boundary of heat input for analyzing the effect of Nd:YAG laser power and pulsed GMA power on laser+pulsed GMA hybrid welding process.

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CW Nd:YAG laser cutting of ultra low carbon steel thin sheets using O2 assist gas

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2007.05.013 ◽

2008 ◽

Vol 196 (1-3) ◽

pp. 64-72 ◽

Cited By ~ 19

Author(s):

Hanadi G. Salem ◽

Mohy S. Mansour ◽

Yehya Badr ◽

Wafaa A. Abbas

Keyword(s):

Carbon Steel ◽

Nd:Yag Laser ◽

Laser Cutting ◽

Low Carbon Steel ◽

Thin Sheets ◽

Low Carbon ◽

Ultra Low Carbon Steel

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

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.554-557.596 ◽

2013 ◽

Vol 554-557 ◽

pp. 596-602 ◽

Cited By ~ 3

Author(s):

Fazliana Fauzun ◽

Syarifah N. Aqida ◽

Md. Saidin bin Wahab

Keyword(s):

Grain Size ◽

Surface Modification ◽

Carbon Steel ◽

Nd:Yag Laser ◽

Low Carbon Steel ◽

Laser Surface ◽

Low Carbon ◽

Laser Surface Modification ◽

Metallographic Study ◽

Modified Layer

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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