2016-1(18)

Design, manufacturing and commissioning of nuclear industry equipment

Article NameStudy of Wear-Resistance Coatings Obtained by Means of Supersonic Gas-powder and Gas-powder Surfacing
AuthorsT.А. Litvinova, A.А. Metsler, R.V. Pirozhkov
Address

Volgodonsk Engineering Technical Institute the branch of National Research Nuclear University «MEPhI», 73/94 Lenin St., Volgodonsk, Rostov region, Russia 347360
* e-mail: bratsk_tanja@mail.ru ; **  e-mail: razvitie@zao-grant.ru ;
*** e-mail: RVPirozhkov@mephi.ru

AbstractThis work is continuation of researches of coatings made by the method of gas-powder surfacing and a supersonic gas-powder surfacing for the purpose of studying the ability of a material to resist the impact of abrasive particles. For this purpose there were performed a comparative study of weld alloys, the resistance to mechanical wear. Deposited coating samples were cut, according to the requirements, of rectangular shape measuring 4 x 5 x 10 mm, with a surfacing material of a thickness h1,2=1,0-1,2 mm, and h3,4=1,5-1,7 mm at the end. Reference samples were pre-seasoned by the standard method (heating to 850 ° C, exposure time 2 min, cooling; hardness during quenching HRC 62 in water, in oil HRC 54). The static load on a sample of this size was 8,75 kg/cm2. The value of ΔU wear weight was determined by weighing before and after tests on a laboratory analytical balance with an accuracy of 2∙10-4 g (type VLR-200). After each test the samples were removed, washed, dried. Tests were carried out at constant load P = 400 g. Under other equal conditions of testing samples from previously conducted a supersonic gas-powder surfacing, have the best resistance to abrasive wear, as a result, the weight loss of the sample is 3 times less than in the sample of gas-powder surfacing. Study of wear-resistance in the weld coating methods and powder supersonic gas-powder surfacing has revealed that the preferred method, producing samples is a supersonic gas-powder surfacing.
Keywordssupersonic gas-powder surfacing, wear-resistance, protective coatings, subsonic gas-powder surfacing, abrasive particles, equipment of nuclear power plants
LanguageRussian
References

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