Equipment for electric arc metallizing with pulsed discharge of the air-spraying jet

Royanov, Vyacheslav; Bovikov, V. I.

doi:10.1080/01431161.2015.1058006

Cited by 3 publications

(4 citation statements)

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“…The nozzle-exit pressure is at least 0.2-0.4 MPa being well above the excess pressure Pa=0.0893 MPa. The results obtained correspond to drop to the supersonic flow velocity [12].…”

Section: Gas Flow Characteristics During Arc Metallizationmentioning

confidence: 62%

“…Such a measuring circuit allows determining the value in different sections of the interelectrode space (center and periphery) and also along the jet. The accepted circuit corresponds to the problem solved in gas dynamics in the flow around a blunt-nosed body and determining the pressure shown by a Pitot tube [12].…”

Section: Justification Of the Methods For Studying The Effect Of Elmentioning

confidence: 99%

“…The material is sprayed by means of an air jet. The working pressure of compressed air is 0.5-0.6 MPa, the flow rate is 60-150 m 3 [11,12]. To form the air-spray jet, spray heads with cylindrical nozzles are used.…”

Section: Gas Flow Characteristics During Arc Metallizationmentioning

confidence: 99%

“…In electric arc metallization, axisymmetric (cylindrical) nozzles are used in devices. The flow pattern in the initial section in the case of an axisymmetric supersonic jet with n>2, given in [12], is shown in Fig. 1.…”

Section: Fig 1 Supersonic Jet Flow Patternmentioning

confidence: 99%

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Development of properties of spray flow and nature of pressure distribution in electric arc metalization

Royanov

Zakharova

Lavrova

2017

EEJET

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Розроблено вдосконалену схему процесу електродугової металізації. Вона дозволяє врахувати плавлення оболонки і прилеглого порошкового стержня за рахунок обмеженої дії розпилюючого струмення безпосередньо на «внутрішню» поверхню торців електродів. Цей ефект забезпечує можливість протікання металургійних процесів і отримання легованих частинок при розпиленні порошкових електродів Ключові слова: електродугова металізація, порошковий стрижень, легування, газове середовище, розпорошуючий струмінь Разработана усовершенствованная схема процесса электродуговой металлизации. Она позволяет учесть плавление оболочки и прилегающего порошкового стержня ввиду ограниченного действия распыляющей струи непосредственно на «внутреннюю» поверхность торцов электродов. Этот эффект обеспечивает возможность протекания металлургических процессов и получение легированных частиц при распылении порошковых электродов Ключевые слова: электродуговая металлизация, порошковый стержень, легирование, газовая среда, распыляющая струя

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“…The nozzle-exit pressure is at least 0.2-0.4 MPa being well above the excess pressure Pa=0.0893 MPa. The results obtained correspond to drop to the supersonic flow velocity [12].…”

Section: Gas Flow Characteristics During Arc Metallizationmentioning

confidence: 62%

Section: Justification Of the Methods For Studying The Effect Of Elmentioning

confidence: 99%

Section: Gas Flow Characteristics During Arc Metallizationmentioning

confidence: 99%

Section: Fig 1 Supersonic Jet Flow Patternmentioning

confidence: 99%

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Development of properties of spray flow and nature of pressure distribution in electric arc metalization

Royanov

Zakharova

Lavrova

2017

EEJET

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Properties of coatings obtained by supersonic electric arc metallization with aerosol fluxing

Kolomeichenko

Logachev

Деев

et al. 2022

Izv. vysš. učebn. zaved., Čern. metall.

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The method of electric arc metallization has both undeniable advantages and some disadvantages. For example, there is a burnout of alloying elements and a high content of oxides in the applied coating. Aerosol fluxing during metallization can solve this problem and neutralize the negative oxidative effect of interaction of the applied metal with air oxygen. This article discusses an effective method to improve physical and mechanical properties of an electrometallization coating using aerosol fluxing. The essence of this method is introduction of an aerosol together with compressed air into a torch of molten metal. This aerosol consists of an aqueous solution of the chemical inorganic materials. Such the aqueous solution is poured into a hydrodispergator, which is connected to the air channel of the metallizer. Aerosol fluxing makes it possible to deoxidize and ligate metal during electric arc metallization. As a result, the physical and mechanical properties of the metal increase. The paper considers the results of topographic studies of electrometallization coatings. Formed coatings have a structure with grain sizes from 200 to 2500 nm and also have pronounced and subtle grain boundaries. Aerosol fluxing with electric arc metallization forms a coating with finer-grained structure, which increases their strength. It is established that formed coatings have a finer-grained structure and increased strength when using aerosol fluxing during electric arc metallization. Metallographic studies showed that the thickness of the electrometallization coating varies from 2490 µm to 2586 µm. The use of aerosol fluxing during electric arc metallization does not significantly affect the coating thickness. The microhardness of electrometallization coatings was studied. This study showed that the use of aerosol flux consisting of Na2CO3 , Na3AlF6 , Na2B4O7 during metallization increases microhardness of electrometallization coatings by 1.6 – 1.9 times.

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Properties of Coatings Obtained by Supersonic Arc Spraying with Aerosol Fluxing

et al. 2022

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Equipment for electric arc metallizing with pulsed discharge of the air-spraying jet

Cited by 3 publications

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Development of properties of spray flow and nature of pressure distribution in electric arc metalization

Development of properties of spray flow and nature of pressure distribution in electric arc metalization

Properties of coatings obtained by supersonic electric arc metallization with aerosol fluxing

Properties of Coatings Obtained by Supersonic Arc Spraying with Aerosol Fluxing

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