Metal–carbothermal methods of reducing the degree of oxidation of dispersed metal in electric arc metallizing

Solovev, R. Yu.; Vorob'ev, P. A.; Litovchenko, N. N.

doi:10.1080/09507116.2012.715930

Cited by 3 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this form as it shown in the figure heterophase flow moves into electrical circuit, arc, metal sprayer, where thermodissociation of the dissolved substances and other phase transformations [8][9][10][11][12]. 1 -hydro-disperser; 2 -metal sprayer; 3 -filter for compressed air cleaning.…”

Section: Results Of the Researchmentioning

confidence: 99%

Aerosol fluxing in electro arc metallization

Logachev¹,

Kolomeichenko

Kuznetsov

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Abstract. The main structural and technological factors of electric arc metallizers, which significantly affect the quality of their operation, are considered. The results of experimental studies on the adhesion strength, porosity, microhardness and comparative wear resistance of coatings obtained by electroarc metallization are presented. Optimal modes of coating with electroarc metallization are determined. It is established that the use of aerosol fluxing during electric arc metallization provides an increase in adhesion-cohesive strength by 25 ... 30%, an increase in microhardness to 40%, a decrease in porosity by 20 ... 25%. IntroductionIn the world practice of restoring the details of machinery and corrosion protection of aluminum and zinc pipes, equipment and metal structures, electric arc metallization (EM) has become very popular, as one of the most technologically productive, high-quality and universal methods of metal coating. However, along with clearly positive sides, EM has certain drawbacks. This perennial problem is the speed and oxidation of dispersed metal in a heterophase stream. Without overcoming these EM problems, it is impossible to further improve the physical and mechanical properties of metal coatings. Despite the extensive volume of studies carried out to modernize EM over the historical period of its use (over 100 years), these problems remain unresolved.

show abstract

Section: Results Of the Researchmentioning

confidence: 99%

Aerosol fluxing in electro arc metallization

Logachev¹,

Kolomeichenko

Kuznetsov

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…Data on the state of the gas medium between the ends of the sprayed electrodes at various gaps between them are absent in the literature [4]. Therefore, the study of this factor is important in the analysis of processes of electrode melting with a flux-cored rod.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…It is known that the arc is divided into two "tongues", from which the flow of particles is separated. At the same time, a number of researchers considered the arc discharge to be a quasi-solid impermeable body [4][5][6][7].…”

Section: Research On the Effect Of The Spray Jet On The Formation mentioning

confidence: 99%

See 1 more Smart Citation

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

Royanov

Zakharova

Lavrova

2017

EEJET

View full text Add to dashboard Cite

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

show abstract

Discrete and Continual Strengthening of Contacting Structural Elements: Conception, Mathematical and Numerical Modeling

et al. 2019

View full text Add to dashboard Cite

The paper proposes a variant of discrete and continual strengthening of contacting elements of machine-building structures. One of the parts is strengthened discretely, and its counterpart is strengthened continually. The resulting pair combines positive qualities of two different types of strengthening methods. Investigations on stressed-deformed state of the treated fragments provides a basis for conclusion about high efficiency of the proposed combined strengthening method. While applying the method mechanisms of negative feedback between the stages “loading – contact interaction – friction – wear” are involved unlike with conventional versions of strengthening technologies. In this way, positive integral effect results from an application of the developed strengthening technology. This effect is significantly higher than the sum of effects obtained owing to application of every strengthening technology. In this case a favorable distribution of contact pressures between contacting bodies has been ensured. This, in its turn, leads to a decrease in wear that prevents a sharp increase in loads acting between bodies. Thus stabilization of the investigated processes occur. The papers considers stress-strain state of a representative fragment of the investigated system in order to demonstrate positive effects arising from the contact of strengthened bodies. Results of the calculations indicate validity of forecast assumptions. Indeed, the strengthened zones can bear high loads. However, due to high tribo-mechanical properties of the material in the hardened zones, friction and wear in them are much lower than for a base material. Due to this, all positive components of the total effect are formed. This effect is supported by the fact that a counterpart is processed continually. In particular, metals from aluminum-type materials are coated with a thin layer of oxides by forming them in a strong electric field of a special medium. Formed solid phases of oxides serve as a structural basis for formation of surface layers. In combination with discretely strengthened surfaces of counterparts the formed pair acquires high strength, antifriction and anti-wear properties.

show abstract

Metal–carbothermal methods of reducing the degree of oxidation of dispersed metal in electric arc metallizing

Cited by 3 publications

References 0 publications

Aerosol fluxing in electro arc metallization

Aerosol fluxing in electro arc metallization

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

Discrete and Continual Strengthening of Contacting Structural Elements: Conception, Mathematical and Numerical Modeling

Contact Info

Product

Resources

About