Formation features of structure-phase states of Cr–Nb–C–V containing coatings on martensitic steel

Konovalov, S. V.; Кормышев, В. Е.; Gromov, V. Е.; Ivanov, Yu. F.; Kapralov, E. V.; Семин, А. П.

doi:10.1134/s1027451016050098

Cited by 32 publications

(13 citation statements)

References 5 publications

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“…12b). The relaxation of these stresses occurs behind two mechanisms [15,16]. According to the first of them, the residual stress relaxation in homogeneous solid coatings (under absence in their structure of ductile structural components) occurs through the formation of the microcracks network in them (Fig.…”

Section: The Air Flow Effect On the Mechanical Properties Of Arc Spramentioning

confidence: 99%

The Effect of Increasing the Air Flow Pressure on the Properties of Coatings During the Arc Spraying of Cored Wires

Студент

Volodymyr

Student

et al. 2019

Strojnícky Časopis - Journal of Mechanical Engineering

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The melting conditions of the electrode wires and the structure of coatings, obtained by the electric arc spraying method depending on the pressure of the spraying air flow, are analysed in the current paper. The effect of air pressure on the spraying angle of the flow of melted metal droplets is demonstrated. It is established that due to the decrease in this spraying angle, the temperature of the droplets increases. In addition, high-speed airflow is more easily captured by smaller molten metal droplets and during the contact with the substrate surface their deformations were more strongly. Due to such phenomenon, the porosity of the coatings was reduced and the number of lamellae, welded to each other, increased. With the increasing pressure of the air flow, the thicknesses of the lamellae were decreased, however, the amount of the oxide phase in the coatings has increased. As a result, the hardness, wear resistance and cohesive strength of the coatings, obtained at a higher pressure of the air flow, have increased, and the level of residual stresses of the first kind in them decreased.

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Section: The Air Flow Effect On the Mechanical Properties Of Arc Spramentioning

confidence: 99%

The Effect of Increasing the Air Flow Pressure on the Properties of Coatings During the Arc Spraying of Cored Wires

Студент

Volodymyr

Student

et al. 2019

Strojnícky Časopis - Journal of Mechanical Engineering

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“…One of the key areas of modern materials science is surface modification of original materials using chemical, physical or some other modification types [1,2]. These modifications enable obtaining required surface parameters without losing the integrity of structure of the material and its inherent properties.…”

Section: Introductionmentioning

confidence: 99%

Picosecond-laser processing of stainless steel for fabricating superhydrophobic surfaces

Dupliak¹,

Liang²,

Yan³

et al. 2020

Ukr. J. Phys. Opt.

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We create a high-precision surface microstructure at the surfaces of SAE 304 stainless steel plates, using picosecond-laser pulses with high repetition rates. The surfaces acquire cross-groove patterns due to a line-by-line laser ablation technology. The wettability of the microstructured metal surface is studied. The microstructured surface provides a superhydrophobicity with good anticorrosion and antibacterial properties, which can extend significantly the scope of applications of the underlying material.

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“…Online evaluation of weld quality is important in all of the welding processes, such as in resistance spot welding, researchers and experts took efforts to improve the tensile–shear strength of the weld [15]. Alternatively, in some metal surface processing area, X-ray and electron microscopy were the main means to detect the formation feature [16]. The output of the DP-GMAW process is the weld bead, hence, the evaluation of the quality of the process is to evaluate the performance of the weld bead.…”

Section: Introductionmentioning

confidence: 99%

Effects of Operational Parameters on the Characteristics of Ripples in Double-Pulsed GMAW Process

2019

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This study focuses on the characteristics of the ripples of the weld bead formed during the double-pulsed gas metal arc welding (DP-GMAW) process. As a special output of the process, ripples include many useful information and can reflect the quality of the welding process. The work analyzed the operational characteristics of the DP-GMAW process based on robot operation which used the latest twinpulse XT DP control process, and then selected five key operational parameters, such as average current, welding speed, twin pulse frequency, twin pulse relation, and twin pulse current change in percent, to explore their effects on the formation and characteristics of ripples. A reliable method of measuring the distance of the ripples was used to provide convincing data. According to a series of experimental observations and analyses, the distance of ripples and appearance under different conditions were obtained. Also, curve fitting equations between each operational parameter and corresponding distances of ripples was obtained. To testify the effectiveness of the curve fitting equations, corresponding verifying experiments were conducted, and the results showed that all the errors were below 10%. In addition, the different levels of the operational parameters on the formation and characteristics of ripples were provided. This work can be a reference for the process and quality control improvement for the DP-GMAW process.

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Formation features of structure-phase states of Cr–Nb–C–V containing coatings on martensitic steel

Cited by 32 publications

References 5 publications

The Effect of Increasing the Air Flow Pressure on the Properties of Coatings During the Arc Spraying of Cored Wires

The Effect of Increasing the Air Flow Pressure on the Properties of Coatings During the Arc Spraying of Cored Wires

Picosecond-laser processing of stainless steel for fabricating superhydrophobic surfaces

Effects of Operational Parameters on the Characteristics of Ripples in Double-Pulsed GMAW Process

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