Research on Heat Source Model and Weld Profile for Fiber Laser Welding of A304 Stainless Steel Thin Sheet

Li, Peizhi; Fan, Yu; Zhang, Chonghao; Zhu, ZY; Tian, Wen‐Ling; Liu, Anmin

doi:10.1155/2018/5895027

Cited by 7 publications

(4 citation statements)

References 18 publications

(22 reference statements)

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“…The closer to the nitrided layer, the higher the TiN content in the tissue, the higher the hardness. The gradient characteristics of the microstructure and hardness of the nitrided layer are determined by laser nitriding and its rapid solidification process [18,19]. After laser nitriding, the surface of molten metal solidifies in the fusion zone.…”

Section: Resultsmentioning

confidence: 99%

A Comparison of Gas Nitriding and Laser Nitriding on Industrial Pure Iron and Ti-Induced Iron

Liu

Fan

et al. 2018

MSF

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Overview of Gas nitriding on the surface of industrial pure iron and laser gas nitriding, research under different nitriding process, the phase, organization and mechanical properties of the nitride layer that is the difference. Plasma sprayed titanium on industrial pure iron surface, the laser nitriding experiments were carried out on the titanium surface. The formation of iron and nitrogen compounds is induced by the combination of titanium nitride. The difference between gas nitriding and laser nitriding is analyzed. The results show that: (1) after gas nitriding, the nitrides formed on the surface of pure iron are mainly ε-Fe2-3N and γ′-Fe4N, the surface hardness is 158 HV, and the increase is 32%. (2) in the 500 W laser power, laser nitriding formed on the surface of Titanium metal layer of pure iron, but not the formation of iron and nitrogen compound, the surface hardness of 168 HV, increased by 46%. (3) under the condition of 500 W laser power, the industrial pure iron was nitrided by laser, without the formation of iron and nitrogen compounds, but the surface hardness of the sample was increased by 20%.

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Section: Resultsmentioning

confidence: 99%

A Comparison of Gas Nitriding and Laser Nitriding on Industrial Pure Iron and Ti-Induced Iron

Liu

Fan

et al. 2018

MSF

Self Cite

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“…In the case of partial penetration of the laser into the welded material, numerical simulation using a conical heat source model can provide realistic results. However, when full penetration is achieved, capturing the characteristics of weld joint expansion and the formation of the root region becomes challenging, particularly when welding thicker sheets [50,51].…”

Section: Conical Heat Source Modelmentioning

confidence: 99%

Heat source models for numerical simulation of laser welding processes – a short review

Behúlová,

Babalová

2024

J. Phys.: Conf. Ser.

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In recent decades, numerical modeling and computer simulation have become an integral part of the design, analysis and optimization of fusion welding processes, including laser welding. In general, laser welding processes involve the interaction of multiple physical phenomena, such as thermal, fluid, metallurgical, chemical, mechanical, and diffusion effects, which makes the development of a simulation model difficult and complex. In addition to the geometric characteristics of the parts to be welded, their material properties must be specified in a wide temperature range, as well as the conditions for heat removal to the environment or shielding gas. One of the most complex tasks in the preparation of a simulation model of the laser welding processes consists in the selection of an appropriate heat source model to accurately determine the heat input to the weld. Very important is also the process of experimental verification and validation of the developed simulation models. In this paper, a short examination of significant mathematical heat source models for numerical simulation of laser welding is provided. Numerical analysis of laser welding of sheets made of S650MC steel is accomplished using conical 3D heat source model with the support of the ANSYS code. The effect of geometrical characteristics of the conical volumetric heat source model on the computed width, length, and depth of the weld pool is discussed, along with evaluation of maximum weld pool temperature.

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“…Wu et al 139 introduced a new heat source model, that is, a rotary–gauss body heat source model, to achieve precise results in modelling the nail head-shaped melt pool of high energy beam welding. Li et al 140 developed a new model named cylindrical and cylindrical heat source model for precise modelling of fibre laser welding weld profile using Marc and Fortran software. The researchers have introduced different models to represent the heat source as line, point or volumetric in different studies.…”

Section: Different Types Of Heat Source Modelsmentioning

confidence: 99%

State-of-the-art review on laser cladding process as an in-situ repair technique

Raj

Maity

Das

2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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The present work reviews the laser cladding process as a repairing technique and the conventional repairing techniques and different heat source models. In this review work, the authors have tried to address the various traditional methods studied for repairing and surface modification. The dominantly used heat source model for numerical modelling of the repairing techniques and the mechanism of the laser cladding process, along with its advantages over the conventional repairing techniques, is also reviewed. This paper also focuses on the predominantly used laser of high power for the cladding process and the effect of process parameters on the quality of the clad layer. The different materials used as clad materials for repairing purposes during the laser cladding process have also been discussed briefly. In this paper, the authors have surveyed literature from different regions of the globe and considered the literature since 1969. This review discusses the various conventional repairing techniques used for repairing, heat source model, process parameters, and different materials used in the laser cladding process. The authors have also briefed the advantages, disadvantages, and application in each of the sections. The use of laser cladding for in-situ repairing process, development of a precise model, use of low-power laser, and application of laser cladding for actual engineering components was also considered in future research work.

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Research on Heat Source Model and Weld Profile for Fiber Laser Welding of A304 Stainless Steel Thin Sheet

Cited by 7 publications

References 18 publications

A Comparison of Gas Nitriding and Laser Nitriding on Industrial Pure Iron and Ti-Induced Iron

A Comparison of Gas Nitriding and Laser Nitriding on Industrial Pure Iron and Ti-Induced Iron

Heat source models for numerical simulation of laser welding processes – a short review

State-of-the-art review on laser cladding process as an in-situ repair technique

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