Peculiarities of laser welding of metals

Petrėtis, Bronius; Balciuniene, M.

doi:10.3952/lithjphys.45108

Cited by 10 publications

(3 citation statements)

References 8 publications

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“…High-energy laser welding in 304 SS material has been rarely reported [2,13,18,19]. High power density permits deep welding and produces narrow HAZ and fine grain structure and minimal distortion by restricting the amount of energy emitted to the material to allow transition from conduction mode to keyhole mode [20]. When a Gaussian representation of heat source during laser irradiation is considered, only the heat input on the top of the workpiece may not lead to accurate results.…”

Section: Introductionmentioning

confidence: 99%

304 Paslanmaz çeliğin mikroyapı ve mekanik özellikleri üzerinde yüksek enerjili lazer kaynak parametrelerinin etkisi

İrizalp¹,

Koroglu²

2021

Deu Muhendislik Fakultesi Fen Ve Muhendislik

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Autogenous bead-on-plate laser welding was performed on 2 mm 304SS materials at different heat inputs. The influence of laser energy in low welding speeds on weld performance using a Nd:YAG laser was studied. The weld performance was characterized in terms of weld bead morphology, microstructure and mechanical properties. The result revealed that the crater increased with the increase of heat input, so there is a linear relationship between crater and heat input. The gradual increase of the heat input was not directly related to the penetration of the weld bead. At the highest heat input, weld beads considerably expanded and also the crater deepened, the hardness increased in these joints while tensile strength and ductility reduced. The best mechanical properties were obtained with high laser energy at intermediate heat input. These weldments exhibited better strength even better than base metal 304SS. The microhardness values were distributed homogeneously from the fusion zone to the base metal. Laser energy increased the ferrite network and brought finer ferrites. As a result, usable laser welding parameters in terms of good strength, as well as good ductility and weld bead morphology were defined for welding 304 SS with 2 mm thickness.

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Section: Introductionmentioning

confidence: 99%

304 Paslanmaz çeliğin mikroyapı ve mekanik özellikleri üzerinde yüksek enerjili lazer kaynak parametrelerinin etkisi

İrizalp¹,

Koroglu²

2021

Deu Muhendislik Fakultesi Fen Ve Muhendislik

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“…Firstly, the alloy is diluted in the welding process, and the carbon is diffused in heat treatment or service conditions. Because of high carbon content and low nickel and chromium content in base metal, nickel and chromium concentrations increase in the parent metal near the welding seam in the welding process, while carbon concentration decreases to form the decarburized layer [2]. As the result, decarbonization may occur in the base metal side, which may reduce the steel strength in this zone.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Property and Corrosion Resistance of the E309L Buffer Layer in Weld Overlay

Wang

Ding

2014

AMM

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The weld overlay technology of high strength low alloy steel (HSLA) and austenitic stainless steel is widely applied in such fields as petroleum, chemical industry and energy, and its service environment is of high temperature and corrosion. As the matching performance is often poor for both austenitic stainless steel and high strength low alloy steel, cavities and crackles occur easily at the joints, which cause brittle fractures with dangerousness to some extent. So in the present study, the metal-inert gas welding (MIG) is used to clad the austenitic stainless steel to HSLA. In the experimental group, 4mm buffer layer (E309L) and 8mm cladding layer (E347L) were successively cladded on the substrate (Q345B), while 12mm cladding layer was directly deposited on the substrate in the control group. The hot corrosion tests were done, and through the scanning electron microscope (SEM), we observed the cross-sectional morphology. By the X-ray diffraction (XRD), we analyzed ingredients of the corrosion products. The corrosion products in the experimental group mainly consist of iron and nickel oxides, while the products are mainly iron complex compound and salt in the control group. The SEM results show the area near the welding seam of the specimens without buffer layer had been corroded severely. However, only a slight corrosion occurs adjacent to the welding seam. This demonstrates that the buffer layer can protect the specimens from being corroded.

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“…The pressing rivet and die-casting way have many disadvantages, such as deformed, inefficiency. Laser welding has the advantages of high power density, fast speed, weld narrow and small deformation [1][2][3], so is more suite to welde thin workpiece phone nuts.…”

Section: Introductionmentioning

confidence: 99%

Study on Laser Welding of Phone Nuts

2013

AMR

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Used YAG pulse laser to weld 304 stainless steel nuts, studied about the parameters such as peak power, pulse width, defocus distance impacting on the performance of the joints welded by laser. The studies showed that the tensile strength and torque of the nuts increased as the peak power and the pulse width increased.Burn through in welding easy occur when laser pulse energy is too big, pulse width is too wide or defocus distance is too low.

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Peculiarities of laser welding of metals

Cited by 10 publications

References 8 publications

304 Paslanmaz çeliğin mikroyapı ve mekanik özellikleri üzerinde yüksek enerjili lazer kaynak parametrelerinin etkisi

304 Paslanmaz çeliğin mikroyapı ve mekanik özellikleri üzerinde yüksek enerjili lazer kaynak parametrelerinin etkisi

Mechanical Property and Corrosion Resistance of the E309L Buffer Layer in Weld Overlay

Study on Laser Welding of Phone Nuts

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