Mathematical Analysis of the Influence of the Flux-Cored Wire Chemical Composition on the Electrical Parameters and Quality in the Underwater Wet Cutting

Parshin, S. G.; Levchenko, A.M.; Wang, P.; Maystro, Alexey S.

doi:10.2478/adms-2021-0006

Cited by 10 publications

(4 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many studies constantly appear to suggest new methods for the improvement in stability and quality of underwater wet welding [ 6 , 7 , 8 ]. The work of Surojo et al (2020) reported that underwater welding related to high risks for welders, such as electric shock.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Metal-Based Nanoparticles Produced by Different Types of Underwater Welding on Marine Microalgae

Pikula

Kirichenko

Chernousov

et al. 2023

Toxics

View full text Add to dashboard Cite

Underwater wet welding is commonly used in joining pipelines and in underwater construction. Harmful and hazardous compounds are added to many flux-cored wires for underwater welding and cutting, and can have a negative impact on marine life. The specific objective of this study was to evaluate the aquatic toxicity of two suspension samples obtained using welding electrode and flux-cored wire in marine microalgae Attheya ussuriensis and Porphyridium purpureum. Growth rate inhibition, cell size, and biochemical changes in microalgae were evaluated by flow cytometry. The results of the bioassay demonstrated that the suspension obtained after welding with electrode had an acute toxic impact on diatomic microalgae A. ussuriensis, and both tested suspensions revealed chronic toxicity in this microalga with a 40% growth rate inhibition after exposure to 40–50% of prepared suspensions for 7 days. Red algae P. purpureum revealed tolerance to both suspensions caused by exopolysaccharide covering, which prevents the toxic impact of metal cations such as Al, Ti, Mn, Fe, and Zn, which are considered the main toxic components of underwater welding emissions.

show abstract

Section: Introductionmentioning

confidence: 99%

The Impact of Metal-Based Nanoparticles Produced by Different Types of Underwater Welding on Marine Microalgae

Pikula

Kirichenko

Chernousov

et al. 2023

Toxics

View full text Add to dashboard Cite

show abstract

“…To determine the quality of cutting, Parshin have provided a criterion based on the ratio of the voltage probability density in the idle and operating cycles. (Parshin et al, 2021c) However, the arc sensor was not able to monitor the cutting process or to detect the cutting depth as the arc would go out when the cut bottom declined. Underwater vision sensor is important but must overcome the challenge of water turbidity and bubbles fluctuation.…”

Section: Introductionmentioning

confidence: 99%

Research on the underwater cutting mechanism of flux-cored arc cutting for aluminum alloy process

Li²,

Wang³

et al. 2023

Front. Mater.

View full text Add to dashboard Cite

With the fast-growing demand of aluminum alloys in ships and deep-sea pressure structures, an accurate and efficient underwater cutting operation for aluminum alloy is significant. However, its underwater arc cutting mechanism is still not clear enough, which limits its further application. The challenges lie in poor underwater visibility and complex underwater environment. In this study, process experiments, underwater sensor, and numerical simulations were conducted during cutting process to investigate the cutting mechanism of 5,052 aluminum. Firstly, the effect of parameters were investigated on cutting current, voltage, and water depth on the underwater kerf formation. In addition, three typical kerf formations, including “V” type, “II” type and “∧” type, were found; Secondly, visual sensing system was setup to monitor the cutting arc trajectory and the combustion process during the cutting process. Specially, the underwater burning phenomenon was observed. Finally, Finite Element Analysis was performed to further analyze the underwater arc cutting kerf formation of aluminum alloy. A semi-ellipsoidal composite heat source was applied to simulate the underwater arc, and the aluminum thermal reaction-generated heat was introduced. A dynamic method named “birth and death elements” was utilized to simulate the removal of molten metal. The temperature test results show that the simulation process is feasible. All results showed that different cutting parameters led to different cutting mode and affected the kerf forming. 5,052 aluminum alloy in the deep water environment (≥50 m) kerf significantly narrowed. The kerf cross-section produces an inward concavity and the kerf surface is as wide as the cutting wire. The aluminum kerf forming process is greatly impacted by the process parameters and self-propagating high-temperature synthesis reaction during aluminum alloy cutting. The periodicity of the cutting process was computed by the numerical simulation with the arc motion trajectory monitored by the high-speed camera. The numerical results of temperature distribution and kerf shape were consistent with the experimental data, which revealed the cutting mechanism.

show abstract

“…Due to the specific environment, many structures, including offshore structures (such as oil and gas platforms, wind farms, ports, hydraulic structures, subsea oil and gas pipelines) need to be repaired, and components to be scrapped or reconditioned, so underwater cutting work is being carried out [26]. An exemplary study on this topic was published by Parshin et al [27,28]. They present a study on underwater wet cutting with the use of flux-cored wires to improve quality and performance.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Surface Stereometry of Alloyed Austenitic Steel after Fibre Laser Cutting using Confocal Microscopy

et al. 2022

View full text Add to dashboard Cite

The paper extends the concept of cut edge quality and examines the fibre laser cutting process. A Prima Power Platino Fiber Evo device with a reference speed (RS) of 3500 mm/min was used for laser cutting. In order to analyse the influence of the laser cutting speed on the cut edge quality of X5CrNi18-10 stainless steel sheets, macroscopic studies were conducted on a stereoscopic microscope and surface stereometry on a confocal microscope. The obtained results were analysed to evaluate 2D and 3D parameters. These parameters make it possible to determine the cut edge quality and the susceptibility to the application of protective coatings. It was observed that the value of the Sa parameter is the highest for a cutting speed equal to 130% of RS. The Sz parameter is similar, while the Sk, Spk and Svk parameters rise as the speed increases, which is a negative phenomenon. Comparative tests were also conducted for four specimens made at cutting speeds of 70%, 85%, 100% and 115% of RS, respectively. It was found that the laser cutting speed has a significant impact on the cut edge quality and that stainless steel can be cut while maintaining the technological regime at 115% of RS.

show abstract

Mathematical Analysis of the Influence of the Flux-Cored Wire Chemical Composition on the Electrical Parameters and Quality in the Underwater Wet Cutting

Cited by 10 publications

References 26 publications

The Impact of Metal-Based Nanoparticles Produced by Different Types of Underwater Welding on Marine Microalgae

The Impact of Metal-Based Nanoparticles Produced by Different Types of Underwater Welding on Marine Microalgae

Research on the underwater cutting mechanism of flux-cored arc cutting for aluminum alloy process

Analysis of the Surface Stereometry of Alloyed Austenitic Steel after Fibre Laser Cutting using Confocal Microscopy

Contact Info

Product

Resources

About