Modelling of the optimum thermal conditions of laser welding circumferential joints of small diameter

Melyukov, V. V.; Trufakin, A. I.; Chirkov, A. M.; Chastikov, Alexander

doi:10.1533/wint.2006.3614

Cited by 2 publications

(3 citation statements)

References 2 publications

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“…In the light of the previous studies (Melyukov et al, 2006;Miyashita et al, 2005;Mayboudi et al, 2006Mayboudi et al, , 2007Sabbaghzadeh et al, 2007;Bardin et al, 2005;Balasubramanian et al, 2008;Pu et al, 2007;Kim et al, 2003;Dahmen et al, 2000;Zhang et al, 2004;Salminen, 2003;Krasnoperov et al, 2004;Longfield et al, 2007;Casalino and Minutolo, 2004), the present study is carried out to examine laser welding efficiency. The first and second laws of thermodynamics are considered when modelling the thermal efficiencies.…”

Section: Introductionmentioning

confidence: 99%

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Laser welding: the first and second law analysis

Sahin

Ayar

Yilbaş

2010

IJEX

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Thermal efficiency analysis can be used to minimise the energy losses in laser welding. In the present study, laser welding and efficiency analysis are considered. The first and second law efficiencies for the welding process are formulated and quantified for new parameters associated with the welding geometry. These parameters include excess mass ratio, loss mass ratio, and heat loss ratio. It is found that the first and second law efficiencies improve gradually with increasing excess mass ratio. However, the first and second law efficiencies reduce with increasing loss mass ratio and heat loss ratio, provided the decrease in efficiencies with increasing heat loss ratio is gradual.

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Section: Introductionmentioning

confidence: 99%

“…The modelling of the optimum thermal conditions for laser welding joints of small diameter was carried out by Melyukov et al (2006). The modelling of the optimum thermal conditions for laser welding joints of small diameter was carried out by Melyukov et al (2006).…”

Section: Introductionmentioning

confidence: 99%

Laser welding: the first and second law analysis

Sahin

Ayar

Yilbaş

2010

IJEX

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“…The possibilities of plasma deposition are continuously increasing, and its application areas are expanding [10], but after applying a protective coating using plasma, the surface layer may have a loose structure, porosity, cracks, delaminations, risks, and with increasing coating thickness, stresses arise in the sprayed layer, under the influence of which the additive layer is separated from the substrate.…”

Section: Introductionmentioning

confidence: 99%

Hardness of the Powder Coating PG-CP4 Applied to Steel 40H13 and Subjected Laser Treatment

Гусев

Morozov

Gavrilov

2021

DDF

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The article examines the hardness of the coating made of PG-CP4 powder. Plasma powder deposition was performed to samples made of 40H13 steel and then the samples treated with a laser beam. A multi-factor model was established that relates the hardness of the protective coating to the radiation power W, the longitudinal feed Spr of the laser beam, and the distance L from the protective casing of the laser head to the treated surface. Depending on the laser treatment modes, coating was in a state of complete, partial reflow or its absence. Full reflow is characterized by the adhesion of the filler material to the substrate, by maximum hardness of HRC 51.2–56.6 and no defects. In the absence of reflow, gas sinks, transverse microcracks, detachments, and other defects were found in the coating material, and the hardness decreased to HB 125–212. An increase in W and a decrease in Spr lead to increases the hardness of the treated coating, which is explained by an increase in the specific heat flux supplied to the coating per unit time, and a high rate of heat removal deep into the surface layer of 40H13 steel. The thickness of the surface layer with increased hardness ranged from 0.1 to 1.5 mm. Based on the multi-factor model, laser processing modes are controlled to ensure the required values of the protective coating hardness. The research results are recommended for use in enterprises that implement laser technologies and develop modern laser systems.

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Modelling of the optimum thermal conditions of laser welding circumferential joints of small diameter

Cited by 2 publications

References 2 publications

Laser welding: the first and second law analysis

Laser welding: the first and second law analysis

Hardness of the Powder Coating PG-CP4 Applied to Steel 40H13 and Subjected Laser Treatment

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