Weld bead profile of laser welding dissimilar joints stainless steel

Ghusoon R Mohammed,M Ishak,S N Aqida,Hassan A Abdulhadi

doi:10.1088/1757-899x/257/1/012072

Ghusoon R Mohammed, M Ishak + Show 2 more

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https://doi.org/10.1088/1757-899x/257/1/012072

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Abstract

During the process of laser welding, the material consecutively melts and solidifies by a laser beam with a peak high power. Several parameters such as the laser energy, pulse frequency, pulse duration, welding power and welding speed govern the mode of the welding process. The aim of this paper is to investigate the effect of peak power, incident angle, and welding speed on the weld bead geometry. The first investigation in this context was conducted using 2205-316L stainless steel plates through the varying of the welding speed from 1.3 mm/s to 2.1 mm/s. The second investigation was conducted by varying the peak power from 1100 W to 1500 W. From the results of the experiments, the welding speed and laser power had a significant effect on the geometry of the weld bead, and the variation in the diameter of the bead pulse-size. Due to the decrease in the heat input, welding speed affected penetration depth more than bead width, and a narrow width of heat affected zone was achieved ranging from 0.2 to 0.5 mm. Conclusively, weld bead geometry dimensions increase as a function of peak power; at over 1350 W peak power, the dimensions lie within 30 μm.

Highlights

In the critical industrial technologies, stainless steel is a vital material owing to its fine and excellent mechanical characteristics
The results suggested that the penetration depth depends more on the welding speed than the bead width due to the decrease in the heat input as well as less time of interaction between the source of the laser beam and the weld material
From the experimental outcomes of the fiber laser welding process to joint dissimilar stainless steel plates, the following conclusions may be concluded: 1. There was a decrease in the fusion zone depth and width with increasing welding speed

Summary

Introduction

In the critical industrial technologies, stainless steel is a vital material owing to its fine and excellent mechanical characteristics. When joining stainless steel plates, it is necessary that most requires are achieved. One of the most common ways of joining materials is welding. The welding of dissimilar metals has attracted much investigation interests; their increasing interest been justified by their economic and technical potentials. The idea of joining dissimilar metal has made it possible to achieve flexible product designs through an efficient use of each component material, (maximally utilizing the good specific attributes of individual material). The welding of dissimilar metals or alloys confers flexibility to the design but this often results in problems that have a negative impact on the weld performance [4]

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