Formation mechanism and prevention of weld defects in full penetration laser welding of thick steel plates

2004 ◽  
Author(s):  
Susumu Tsukamoto ◽  
Goro Arakane ◽  
Hiroshi Honda ◽  
Seiji Kuroda
Keyword(s):  
Laser Welding ◽  
Formation Mechanism ◽  
Steel Plates ◽  
Weld Defects ◽  
Full Penetration ◽  
Thick Steel

Narrow-gap laser welding using filler wire of thick steel plates

2017 ◽  
Vol 93 (5-8) ◽  
pp. 2955-2962 ◽  
Author(s):  
Yong Zhao ◽  
Shengchong Ma ◽  
Jian Huang ◽  
Yixiong Wu
Keyword(s):  
Laser Welding ◽  
Steel Plates ◽  
Filler Wire ◽  
Narrow Gap ◽  
Thick Steel

scholarly journals Fe2O3 Nanowire Flux Enabling Tungsten Inert Gas Welding of High-Manganese Steel Thick Plates with Improved Mechanical Properties

2021 ◽  
Vol 11 (11) ◽  
pp. 5052
Author(s):  
Lingyue Zhang ◽  
Anming Hu
Keyword(s):  
Steel Plates ◽  
Inert Gas ◽  
Manganese Steel ◽  
Angular Distortion ◽  
High Manganese ◽  
High Manganese Steel ◽  
Arc Voltage ◽  
Single Pass ◽  
Full Penetration ◽  
Thick Steel

Economic welding of thick steel plates is an emerging challenge for various engineering applications. However, tungsten inert gas (TIG) arc welding, as an economic and widely used method, is not regarded as a suitable tool to weld thick steel plates due to the shallow penetration in a single-pass operation. In this technical progress, the joining of austenitic high manganese steel of 8 mm thickness was successfully performed using nanowire flux activated TIG welding with a full penetration and a narrow bead geometry. Fe2O3 nanowire was used as flux and compared with microscale Fe2O3 flux. Experimental results showed that with nanowire fluxes, the welding yielded the maximum of more than 8 mm thick penetration (full penetration and melt over the plate) with proper operating parameters in a single pass. In sharp contrast, the penetration is only less than 4 mm for a single pass welding without Fe2O3 flux with the similar parameters. Arc voltage—time variation during welding process was analyzed and the angular distortion was measured after welding to understand the activating effect of optimized flux mixture. Compared to welding joint without flux and with microscale Fe2O3 flux, nanoscale Fe2O3 flux has a larger arc voltage and higher energy efficiency, higher joint strength and less angular distortion. The developed joint with nanowire flux qualified the tensile test with tensile strength of 700.7 MPa (82.38% of base material strength) and 34.1% elongation. This work may pave a way for nanotechnology-enabling welding innovation for engineering application.

scholarly journals Oblique laser irradiation technique for vertical welding of thick steel plates employing hot-wire laser welding

2015 ◽  
Vol 33 (4) ◽  
pp. 326-331 ◽  
Author(s):  
Eakkachai Warinsiriruk ◽  
Koei Hashida ◽  
Motomichi Yamamoto ◽  
Kenji Shinozaki ◽  
Hiroshi Yajima ◽  
...  
Keyword(s):  
Laser Welding ◽  
Laser Irradiation ◽  
Steel Plates ◽  
Hot Wire ◽  
Thick Steel
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