Evaluating the hardness and ductility of coatings formed by electron-beam hard-facing in a vacuum

Radchenko, M. V.; Radchenko, V. G.; Kirienko, A. M.; Shevtsov, Yu.O.

doi:10.1007/bf02910626

Cited by 3 publications

(2 citation statements)

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“…6). In the development of electron-beam technologies, the method of powder surfacing with low-energy electron beams (up to 5 Kev), developed by the team of authors, due to the combination of the advantages of powder materials and vacuum protection of the metal allows to create unique performance hardening layers on the surfaces of various parts of diesels [5][6][7][8][9].…”

Section: The Practice Of Using Electron Beam Technologies Of Weldingmentioning

confidence: 99%

The Practice of Using Electron Beam Technologies of Welding, Hardening and Surfacing of Protective Coatings in Vacuum at the Defense Industry Enterprises

2019

PNIPU Bulletin.

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Представлены результаты завершенных исследований и практического применения на предприятиях оборонно-промышленного комплекса изделий со сварными швами и защитными покрытиями, полученными электронно-лучевой сваркой, упрочнением и порошковой электронно-лучевой наплавкой в вакууме. В результате комплексного анализа коллективом авторов в Проблемной лаборатории процессов сварки и создания защитных покрытий АлтГТУ им. И.И. Ползунова на основе более чем 25-летнего опыта в области электронно-лучевых технологий разработана технология электронно-лучевого упрочнения наиболее технологически сложных поршневых алюминиевых сплавов заэвтектического состава марки АК21М2,5Н2,5. Авторами была разработана и прошла успешное тестирование технология производства составного поршня из высококремнистого алюминиевого сплава АК21М2,5Н2,5, изготовленного из двух частей с последующей их сваркой электронным лучом. Упрочнение с оплавлением рабочих кромок матриц для горячего деформирования распылителей дизельного топлива позволило на ОАО «Алтайдизель» повысить разгаростойкость поверхности в 2 раза. Актуальным является практическое использование электронно-лучевой технологии наплавки высоколегированных порошковых сплавов на основе системы Ni-Cr-B-Si для ремонта и восстановления изношенных поверхностей тяжелонагруженных деталей: коленчатых и распределительных валов ДВС, крестовин, шаровых опор, толкателей распределительного валика, ступиц шкивов клиноременных передач, ходовых винтов и др. Для создания защитных покрытий на уплотнительных поверхностях запорной паровой котельной и трубопроводной арматурыседел, тарелок и сфер-была предложена технология прямой порошковой электронно-лучевой наплавки в вакууме. Разработанные технологии могут быть рекомендованы к внедрению на предприятиях Алтайского края, специализирующихся в области двигателестроения при производстве новых или восстановлении и ремонте изношенных деталей и комплектующих для двигателей внутреннего сгорания. Ключевые слова: качество, надежность, электронный луч, сварка, упрочнение, защитные покрытия,порошковая наплавка в вакууме, комплексное исследование, практическое использование, предприятия ОПК. The authors developed and successfully tested the technology of production of composite piston from high-silicon aluminum alloy AK21M2,5H2,5, made of two parts with their subsequent electron beam welding. Hardening with the melting of the working edges of the diesel for hot deformation of spray of diesel fuel allowed at JSC "Altaidizel" increasing of heat resistance surface 2 times. Actual is the practical use of the technology of electron-beam surfacing of high-alloy powder alloys based on the Ni-Cr-B-Si system for repair and restoration of worn surfaces of heavily loaded parts: crankshafts and camshafts of internal combustion engines, crosspieces, ball bearings, camshaft pushers, wheel hubs V-belt drives, propellers, etc. To create protective coatings on the sealing surfaces of the shut-off steam boiler and pipeline valves-saddles, plates and spheres the technology of direct electron-beam powd...

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Section: The Practice Of Using Electron Beam Technologies Of Weldingmentioning

confidence: 99%

The Practice of Using Electron Beam Technologies of Welding, Hardening and Surfacing of Protective Coatings in Vacuum at the Defense Industry Enterprises

2019

PNIPU Bulletin.

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“…Ductility can be defined as the ability of a material to deform under tension without failure, and for most materials the ductility is inversely related to the hardness. 20 Empirical evidence for TiO 2 thin films have shown that the elastic modulus and hardness of rutile TiO 2 is approximately 1.5 to 1.6 times greater than that of the anatase phase 21 and that the elastic modulus of individual SiO x and TiO 2 NWs have been shown to have values close to that of their film equivalents. 22,23 The elastic modulus of SiO x NWs is approximately five times that of TiO 2 NWs and although they exhibit brittle fracture upon bending, have the potential to provide a favorable support, improving the mechanical strength of TiO 2 based nanostructures.…”

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confidence: 99%

The Mechanical and Photochemical Properties of Titania Coated Silica Nanowires

Shalav

Bullock

Anderson

et al. 2012

ECS J. Solid State Sci. Technol.

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Dense layers of silica nanowires, grown directly on Au-coated Si substrates via simple active oxidation processes, were coated with a Ti-alkoxide solution and annealed at different temperatures. Mechanical measurements of the resulting anatase and rutile titania coated silica nanowire samples showed that although the volume fraction of nanowires increased with increasing indentation load, a comparative global effective elastic modulus and hardness could be calculated. The rutile coated samples were found to be more robust under low indentation loads, but more readily suffered from brittle failure at higher loads. The photochemical activity of the coated layers, measured by the photodissociation of deuterium oxide vapor, was found to increase with ultra-violet exposure time, most likely due to the desorption of atmospheric N2 or alkoxide residues. This increase in photoactivity was found to be more pronounced for the anatase coated nanowire samples, consistent with the anatase phase having a greater effective reactive surface.

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The influence of chromium content on wear and corrosion behavior of surface alloyed steel with Fe(16−x)Crx(B,C)4 electrode

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Kılınç

Durmaz

et al. 2021

Engineering Science and Technology, an International Journal

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Evaluating the hardness and ductility of coatings formed by electron-beam hard-facing in a vacuum

Cited by 3 publications

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The Practice of Using Electron Beam Technologies of Welding, Hardening and Surfacing of Protective Coatings in Vacuum at the Defense Industry Enterprises

The Practice of Using Electron Beam Technologies of Welding, Hardening and Surfacing of Protective Coatings in Vacuum at the Defense Industry Enterprises

The Mechanical and Photochemical Properties of Titania Coated Silica Nanowires

The influence of chromium content on wear and corrosion behavior of surface alloyed steel with Fe(16−x)Crx(B,C)4 electrode

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