The effect of joint edge surface preparation on the efficiency of fiber laser welding of low-alloyed steels

Соколов, М. В.; Salminen, Antti

doi:10.5755/j01.mech.21.3.8798

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…Other factors than the main ones have also been studied. Sokolov and Salminen 18 studied the effect of edge surface preparation on the efficiency of the fiber laser welding for low alloy steels. The results showed that no additional accurate machining of the edges is necessary and that a small gap can be used.…”

Section: Introductionmentioning

confidence: 99%

Interactions of the process parameters and mechanical properties of laser butt welds in thin high strength low alloy steel plates

Riofrío

Capela

Ferreira

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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High strength low alloy steels subjected to the thermomechanical control process present excellent strength–toughness combination, high strength/weight ratio, and weldability. Therefore, they are widely used in structural components, such as pressure vessels, oil/gas transportation pipes, lifting equipment, vehicles, shipbuilding and offshore industries, and in the automotive industry where low thickness (0.8–3 mm thickness) is of great importance. Usually, these steels are welded by conventional gas metal arc welding, which creates wide heat-affected zones, large residual stresses, and distortion in the welded parts. Laser welding is nowadays an alternative process to weld high strength low alloy steel parts due to its advantages. The aim of this work is to understand the effect of process parameters on defects, weld bead geometry, microstructure, and mechanical properties, namely hardness and tensile strength. We identify the main laser welding parameters and their influence on the weld bead geometry and defects, for a 3 mm thick high strength low alloy steel welded under a maximum power of 2 kW. A cross section of the weld seam was optimized achieving a good geometry without porosity. The threshold value of the heat input to achieve complete penetration was determined for different focus diameters. The microstructure, size, and hardness of the heat-affected zone and of the fusion zone are strongly influenced by the heat input. The values of the tensile strength achieved in butt welds were close to the base metal by an appropriate selection of the laser welding parameters and the heat input.

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Section: Introductionmentioning

confidence: 99%

Interactions of the process parameters and mechanical properties of laser butt welds in thin high strength low alloy steel plates

Riofrío

Capela

Ferreira

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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Evaluating edge joint preparation impact on penetration depth in laser-arc hybrid welding

Artero-Real,

Kristiansen,

Frostevarg

et al. 2025

Optics & Laser Technology

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Producing of bimetal joints by laser welding with full penetration

Schmidt¹,

Kuryntsev²

2014

The Paton Welding J.

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Current level of development of technologies for treatment of metallic materials is impossible without using of lasers, which have found application in such processes as cutting, heat treatment, welding, engraving and brazing. This paper describes investigation of process of production of stainless steel-brass bimetal joint using laser welding with full penetration. The specimens were welded on equipment of IPG «IRE-Polus» Ltd. This company manufactures machines for laser welding using tongs. Thickness of specimens from 12Kh18N10T steel and L63 brass made 3 mm. Welding was carried out at different modes, and influence of postweld heat treatment on mechanical properties of the joints was evaluated. Performed are metallographic investigations, and microhardness of different zones of welded joint is measured. It is determined that application of laser welding with full penetration for production of bimetal joints is possible under condition of more accurate adjustment of welding modes and postweld heat treatment. 8 Ref., 2 Tables, 6 Figures.

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The effect of joint edge surface preparation on the efficiency of fiber laser welding of low-alloyed steels

Cited by 3 publications

References 13 publications

Interactions of the process parameters and mechanical properties of laser butt welds in thin high strength low alloy steel plates

Interactions of the process parameters and mechanical properties of laser butt welds in thin high strength low alloy steel plates

Evaluating edge joint preparation impact on penetration depth in laser-arc hybrid welding

Producing of bimetal joints by laser welding with full penetration

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