Studies of Coating Properties After Electrocontact Welding With Steel Tape

Gaskarov, Ilnar; Maksjutov, I.R.; Arslanov, V. V.; Arslanov, A.V.

doi:10.31563/1684-7628-2018-48-4-123-128

Cited by 2 publications

(1 citation statement)

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“…As a result because of high electric resistance additing material is heated and welded to the metal RESEARCH surface [22,23]. The advantages of the electrocontact welding of metal powders are the possibility of quenching of the deposited coating in the process of its welding, efficiency increase by 2-3 times in comparison with numerous coating techniques, reduction of the deposited material rate in comparison with the conventional welding by 3-4 times, the absence of considerable part heating, decrease of alloying elements burning out, low allowance for subsequent machining of the deposited reconditioning coating [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of Coatings Obtained with Electrocontact Welding of Metal Powder Materials

Saifullin¹,

Islamov²,

Kuznetsov³

et al. 2020

Tribol. Ind.

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The investigations of tribo mechanical properties of coatings obtained with electrocontact welding of sintered powder materials and powderpolymer fillers of Russian manufacture are presented. It is proved that the introduction of antifriction components (powders of copper or tin) into filler material at a rate of 5-10 % increases the time to joints seizure by 1.5-2 and decreases by 1.5 the friction ratio. The application of powderpolymer and sintered fillers reinforced with metal grid produces a relief on the operating surface of the coating with the areas possessing minimum hardness. They are worn out more intensely and the forming herewith grooves help to keep lubricating oil on the friction surface. For the friction pair operating in abrasive wear conditions with adhesive wear elements, at welding it is recommended to use powder compositions (by weight): 80-90 % -PG-FBX6-2, 10-20 % of copper powder friction ratio

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Section: Introductionmentioning

confidence: 99%

Tribological Properties of Coatings Obtained with Electrocontact Welding of Metal Powder Materials

Saifullin¹,

Islamov²,

Kuznetsov³

et al. 2020

Tribol. Ind.

View full text Add to dashboard Cite

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Investigation of pre-sprayed powders for electric contact welding

Masalimov

Galiullin

Sayfullin

et al. 2020

Tekhnicheskiy Servis Mashin

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There are a number of difficulties in the electrical contact welding of powder materials: shedding of powder from the surface of a cylindrical part, impossibility of hardening the layer during welding due to flushing of the powders with coolant and unstable flow of powder into the welding zone. One solution is pre-spraying the powder in some way. (Research purpose). The research purpose is investigating the possibility of electric contact welding of metal powders preliminarily sprayed by a gas-flame method, namely, adhesion strength and losses during preliminary gas-flame spraying of powders. (Materials and methods) Powders of grades PG-NA-01, PrKhIIG4SR, PRZh3.200.28 were sprayed onto flat samples of St3 steel, polished to a roughness of Ra 1.25. The strength of powder adhesion to the base was studied by the cut method. (Results and discussion) The percentage loss of the powder as a whole is 3-23 percent for all the distances studied. The greatest powder losses appear at a distance of more than 180 millimeter from the tip of the burner for powders of grades PG-NA-01 and PrKhIIG4SR. The smallest powder losses were observed for PrZh3.200.28 powder, which totaled 3-7 percent. The maximum adhesion strength of the sprayed powders to the surface was 22.1 megapascals' when spraying the PG-NA-01 powder. The adhesion strength of powders of the grades PrKhIIG4SR and PrZh3.200.28 is small and amounts to 0.2-3 megapascals'. (Conclusions) The use of preliminary flame spraying of powders for their further electric contact welding is possible using PG-NA-01 grade powder, while the best adhesion to the base (that is more than 20 megapascals') is achieved with a spraying distance of 120-140 millimeter. The smallest powder losses during flame spraying are achieved at a spraying distance of 100-160 centimeters', at which the powder loss for the studied grades was 4-12 percent.

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Studies of Coating Properties After Electrocontact Welding With Steel Tape

Cited by 2 publications

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Tribological Properties of Coatings Obtained with Electrocontact Welding of Metal Powder Materials

Tribological Properties of Coatings Obtained with Electrocontact Welding of Metal Powder Materials

Investigation of pre-sprayed powders for electric contact welding

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