Influence of processing gases in laser cladding based on simulation analysis and experimental tests

Koruba, Piotr; Wall, Krzysztof; Reiner, Jacek

doi:10.1016/j.procir.2018.08.025

Cited by 12 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was also observed that the temperature of the melt pool increases by increasing the helium content. Koruba et al 156 studied the influence of shielding gas and carrier gas in the LC process. The simulation analysis was done, which was then validated by experimental analysis.…”

Section: Effect Of Shielding Gas and Absorption Due To Plasma Plumementioning

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:

View full text Add to dashboard Cite

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.

show abstract

Section: Effect Of Shielding Gas and Absorption Due To Plasma Plumementioning

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:

View full text Add to dashboard Cite

show abstract

“…The sudden stress change will lead to geometric defects at the lap joint. [13,43,44] Therefore, the overlap ratio of multi-track cladding coating should not be too low, otherwise unnecessary defects and abnormal residual stress may appear at the lap joint (see Fig. 12(b)), resulting in cracks and reducing the fatigue life of the cladding coating.…”

Section: Stress and Deformation Evolutionmentioning

confidence: 99%

Numerical research on effect of overlap ratio on thermal-stress behaviors of the high-speed laser cladding coating*

2021

View full text Add to dashboard Cite

High-speed laser cladding technology, a kind of surface technology to improve the wear-resistance and corrosion-resistance of mechanical parts, has the characterizations of fast scan speed, high powder utilization rate, and high cladding efficiency. However, its thermal-stress evolution process is very complex, which has a great influence on the residual stress and deformation. In the paper, the numerical models for the high-speed laser cladding coatings with overlap ratios of 10%, 30%, and 50% are developed to investigate the influence rules of overlap ratio on the thermal-stress evolution, as well as the residual stresses and deformations. Results show that the heat accumulation can reheat and preheat the adjacent track coating and substrate, resulting in stress release of the previous track coating and decreased longitudinal stress peak of the next track coating. With the overlap ratio increasing, the heat accumulation and the corresponding maximum residual stress position tend to locate in the center of the cladding coating, where the coating has a high crack susceptibility. For a small overlap ratio of 10%, there are abrupt stress changes from tensile stress to compressive stress at the lap joint, due to insufficient input energy in the position. Increasing the overlap ratio can alleviate the abrupt stress change and reduce the residual deformation but increase the average residual stress and enlarge the hardening depth. This study reveals the mechanism of thermal-stress evolution, and provides a theoretical basis for improving the coating quality.

show abstract

“…Koruba et al [7] have investigated the impact of process gases on Stellite 6 coatings onto a cylindrical steel substrate. The influence of carrier gas and shielding gas variation on the following coating properties were investigated: coating height, depth of the heat affected zone, roughness and microhardness.…”

Section: Introduction and State Of Researchmentioning

confidence: 99%

Spatial Oxygen Distribution of the Direct Metal Deposition Process for Different Powder Nozzles

Keller,

Monney,

Schudeleit

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

Additive manufacturing processes are among the most innovative manufacturing processes of this century. Powder-based direct metal deposition (DMD) is one of these processes. In the DMD process, local shielding takes place via the powder nozzle. The process is therefore critical for oxidation, especially for materials with an affinity for oxidation such as titanium, aluminum and their alloys. In order to study the oxidation behavior in more detail, the present gas dynamics must be further understood. Wirth and Wegener have made a first approach with their gas flow simulation. In this study, a measurement method for spatial oxygen concentration determination is presented. It can be shown that the spatial oxygen concentration follows the nozzle geometry. Furthermore, the coaxial nozzle is superior to the three-jet nozzle with respect to a low oxygen concentration from a carrier gas to shielding gas volume flow ratio of equal to or greater than 0.4. Finally, it can be shown that the use of a shielding gas chamber eliminates the optimization of the gas flow settings.

show abstract

Influence of processing gases in laser cladding based on simulation analysis and experimental tests

Cited by 12 publications

References 8 publications

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

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

Numerical research on effect of overlap ratio on thermal-stress behaviors of the high-speed laser cladding coating*

Spatial Oxygen Distribution of the Direct Metal Deposition Process for Different Powder Nozzles

Contact Info

Product

Resources

About