Numerical Analysis of Heat Flows in the Process of Laser Melting of Coatings

Alisin, V. V.; Roshchin, M. N.

doi:10.3103/s1052618819040046

Cited by 13 publications

(9 citation statements)

References 4 publications

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“…Taking into account the assumption that the force of adhesion interaction is directly proportional to the value of surface energy, then the friction coefficient should be proportional to the surface energy. As shown in [15] work, the hardness of fluoroplastic after radiation hardening is almost 2 times greater than the initial one. According to [1], surface energy [15] σ is nonlinearly proportional to hardness σ -Н 1/2 .…”

Section: Resultsmentioning

confidence: 53%

“…As shown in [15] work, the hardness of fluoroplastic after radiation hardening is almost 2 times greater than the initial one. According to [1], surface energy [15] σ is nonlinearly proportional to hardness σ -Н 1/2 . This explains the increase in the friction coefficient after radiation treatment.…”

Section: Resultsmentioning

confidence: 53%

“…An effective technology for radiation strengthening of fluoroplastic has been developed [14]. The mechanical properties of radiation-strengthened fluoroplastic were studied using the kinetic microindentation method [15]. However, the tribological properties of fluoroplastic under operating conditions in hydraulic fluids experimentally have not been sufficiently studied.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing the tribological properties of fluoroplastics operating in a hydraulic fluid environment

Alisin,

Roshchin,

Lukyanov

2023

E3S Web of Conf.

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The issues of an increasing the wear resistance of fluoroplastics under conditions of dry friction against steel and in the environment of hydraulic fluids are discussed in this article. The statement about the prospects of radiation treatment for strengthening fluoroplastics is substantiated. Comparative tribological tests were carried out on a laboratory friction machine according to the friction scheme of the end of a cylindrical sample made of steel 40X13 on a fluoroplastic plate. It has been established that radiation-modified fluoroplastic has increased wear resistance. The antifriction properties of strengthened fluoroplastic during friction in a hydraulic fluid environment are investigated. The influence of load and speed on the friction coefficient is analyzed. Based on the study, a radiation modification of fluoroplastic rod seals of hydraulic cylinders and hydraulic piston machines is proposed, with a possible increase in wear resistance up to 4 times.

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Section: Resultsmentioning

confidence: 53%

Section: Resultsmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhancing the tribological properties of fluoroplastics operating in a hydraulic fluid environment

Alisin,

Roshchin,

Lukyanov

2023

E3S Web of Conf.

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show abstract

“…The influence of load on the stress distribution and temperature distribution for heat sources of arbitrary shape and time-dependent is studied. An effective strengthening technology for improving the mechanical properties of fluoroplastic is radiation treatment [14]. There are few experimental studies of the sliding friction of fluoroplastic on steel in the hydraulic fluids environment.…”

Section: Introductionmentioning

confidence: 99%

Simulation of transient friction modes of fluoroplastic seals in hydraulic piston pumps

Alisin

2023

E3S Web Conf.

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The article considers the issues associated with the friction of radiation-hardened fluoroplastic on steel in a hydraulic fluid environment during the transition period at the beginning of movement. The friction coefficients are studied when starting from a standstill, at the beginning and in steady motion. Changes in the value of the friction coefficient and changes in the amplitude of oscillation of the friction moment are analyzed. Particular attention is paid to the influence of the restart of motion in a friction coupling. Quantitative relationships of tribological properties are established depending on the time of relative sliding of the samples. It is noted that the friction coefficients in different modes are differ a lot, however, the running-in process proceeds quickly and in the practice of operating hydraulic devices, the running-in process of fluoroplastic seals can be ignored

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“…It was found that the best results were at a substrate temperature of 750 °C. The adhesion strength and thermal insulation of nanostructured yttrium-stabilized zirconia coatings were studied [11]. It is shown that the nanostructured YSZ coating has a bimodal microstructure consisting of nanosized particles and microcolumnar grains.…”

Section: Introductionmentioning

confidence: 99%

Modeling of laser reflow of a powder heat-protective coating on a carbon composite

Alisin

Roshchin

2022

J. Phys.: Conf. Ser.

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The article discusses the issues of creating a heat-shielding coating to protect carbon composites from oxidation and ablation in high-temperature gas flows. The prospects of creating a framework structure containing a refractory zirconium dioxide powder in a metal matrix are substantiated. Particular attention is paid to the distribution of heat fluxes in the process of laser melting of the coating. The temperature in the coating is calculated as the melt front propagates, which opens up the possibility of optimizing the parameters of the coating laser processing technology. The developed technology is promising for the protection of carbon composites in the conditions of their use in the flow path of turbine engines.

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Numerical Analysis of Heat Flows in the Process of Laser Melting of Coatings

Cited by 13 publications

References 4 publications

Enhancing the tribological properties of fluoroplastics operating in a hydraulic fluid environment

Enhancing the tribological properties of fluoroplastics operating in a hydraulic fluid environment

Simulation of transient friction modes of fluoroplastic seals in hydraulic piston pumps

Modeling of laser reflow of a powder heat-protective coating on a carbon composite

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