The Investigation of Partial Penetration Lap Laser Welding Applied on Stainless Steel Railway Vehicles

The current stainless steel railway vehicles body and structure are usually assembled by resistance spot welding process. The weak points of this process are the poor surface quality and bad airtight due to the pressure of electrodes. In this study, the partial penetration lap laser welding process was investigated to resolve the problems. The effects of the laser welding process parameters such as laser power, welding speed and focused distance to the shape of the weld seam and the shear tensile strength were discussed to find the optimal parameters. And the mechanical tests and microstructure analysis were also taken in this study. The optimal parameters are P=2.0kW，S=22mm/s，F=0mm. This work has great significance of improving the manufacturing level of stainless steel railway vehicles.

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Optimization of laser welding process parameters for super austenitic stainless steel using artificial neural networks and genetic algorithm

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2011.11.028 ◽

2012 ◽

Vol 36 ◽

pp. 490-498 ◽

Cited By ~ 71

Author(s):

P. Sathiya ◽

K. Panneerselvam ◽

M.Y. Abdul Jaleel

Keyword(s):

Genetic Algorithm ◽

Neural Networks ◽

Stainless Steel ◽

Artificial Neural Networks ◽

Austenitic Stainless Steel ◽

Laser Welding ◽

Process Parameters ◽

Welding Process ◽

Super Austenitic Stainless Steel ◽

Laser Welding Process

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Optimization of pulsed laser welding process parameters in order to attain minimum underfill and undercut defects in thin 316L stainless steel foils

Optics & Laser Technology ◽

10.1016/j.optlastec.2017.09.047 ◽

2018 ◽

Vol 99 ◽

pp. 30-38 ◽

Cited By ~ 7

Author(s):

M.R. Pakmanesh ◽

M. Shamanian

Keyword(s):

Stainless Steel ◽

Laser Welding ◽

Process Parameters ◽

316L Stainless Steel ◽

Pulsed Laser ◽

Welding Process ◽

Pulsed Laser Welding ◽

Stainless Steel Foils ◽

Steel Foils ◽

Laser Welding Process

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Metallurgical and Wear Behaviour of Stellite 6 Reinforced Stainless Steel 316 Joints by Nd-YAG Laser Welding Process

10.4271/2019-28-0147 ◽

2019 ◽

Author(s):

Varun Kumar Arulvizhi ◽

Selvakumar Alandur Somasundaram ◽

Balasrinivasan Murugan ◽

Ravikumar Natarajan ◽

Abdur Rahman Kalam

Keyword(s):

Stainless Steel ◽

Laser Welding ◽

Welding Process ◽

Wear Behaviour ◽

Yag Laser ◽

Stellite 6 ◽

Stainless Steel 316 ◽

Laser Welding Process

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Shielding gas effect on weld characteristics in arc-augmented laser welding process of super austenitic stainless steel

Optics & Laser Technology ◽

10.1016/j.optlastec.2012.07.035 ◽

2013 ◽

Vol 45 ◽

pp. 46-55 ◽

Cited By ~ 14

Author(s):

P. Sathiya ◽

Mahendra Kumar Mishra ◽

R. Soundararajan ◽

B. Shanmugarajan

Keyword(s):

Stainless Steel ◽

Austenitic Stainless Steel ◽

Laser Welding ◽

Welding Process ◽

Shielding Gas ◽

Super Austenitic Stainless Steel ◽

Gas Effect ◽

Laser Welding Process

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New Application of Lap Laser Welding on Stainless Steel Railway Vehicles

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.44-47.2578 ◽

2010 ◽

Vol 44-47 ◽

pp. 2578-2582 ◽

Cited By ~ 1

Author(s):

Hong Xiao Wang ◽

Chun Sheng Wang ◽

Chun Yuan Shi

Keyword(s):

Stainless Steel ◽

Laser Beam ◽

Laser Welding ◽

Process Parameters ◽

Laser Power ◽

Spot Welding ◽

Tensile Tests ◽

Railway Vehicles ◽

Optimization Of Process Parameters ◽

Focal Position

Recently the problems of resistance spot welding (RSW) stainless steel railway vehicles are causing more attention for poor surface quality. Lap laser welding of stainless steel is investigated with OED(Orthogonal experimental designing ) in this study to replace RSW with the aim of to increase the aesthetics of the car body by eliminating visible indentation on the surface and the flatness of the skin reducing welding deformations. After welding tensile tests and microstructure analysis are performed. The optimization of process parameters were: laser power =2.5kW；welding speed=2.2m/min, focal position=0mm. The fusion zone is symmetrical about the axis of the laser beam and no welding cracks or porosity can be found in any of the welds. This work has great significance of improving the manufacturing level of stainless steel railway vehicles.

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