Obrabotka Metallov 2013 No. 4

ОБРАБОТКА МЕТАЛЛОВ № 4 (61) 2013 84 ТЕХНОЛОГИЯ 4. Rodríguez J., Martín A., Fernández R., Fernández J.E. An experimental study of wear performance of NiCrBSi thermal spray coatings // Wear. – 2003. – Vol. 255. – P. 950–955. 5. Tobar M.J., Álvarez C., Amado J.M. et al. Morphology and characterization of laser clad composite NiCrBSi=WC coatings on stainless steel // Surface and Coatings Technology. – 2006. – Vol. 200. – P. 6313– 6317. 6. Huang S.W., Samandi M., Brandt M . Abrasive wear performance and microstructure of laser clad WC/ Ni layers // Wear. – 2004. – Vol. 256. – P. 1095–1105. 7. Ming Q., Lim L.C., Chen Z.D . Laser cladding of nickel-based hardfacing alloys // Surface and Coatings Technology. – 1998. – Vol. 106. – P. 174–182. 8. Макаров А.В. Наноструктурирующая фрикци- онная обработка углеродистых и низколегированных Obrabotka metallov N 4(61), October–December 2013, Pages 79-85 Hardening frictional treatment of NiCrBSi laser clad coating N.N. Soboleva, A.V. Makarov, I.Yu. Malygina Institute of Engineering Science Ural Branch of Russian Academy of Sciences, Komsomolskaya st., 34, Ekaterinburg, 620049, Russia E-mail: natashasoboleva@list.ru Received 6 September 2013 Revised 5 November 2013 Accepted 15 November 2013 Abstract The influence of technological parameters of a friction treatment (indenter material, coolant-cutting processing medium, friction load and friction coefficient) on the phase composition, surface roughness and microhardness of chromium-nickel PG- SR2 coating, produced by gas-powder laser cladding is studied. The efficiency of the coating surface hardening of the PG- SR2 coating by the indenters of boron nitride in the air and solid carbide in argon at a relatively high friction coefficient “indenter - coating” while ensuring a favorable stress state of the surface layer and high surface finish is determined. It is shown that the friction treatment promotes increase of coating surface durability during tests on fixed abrasive (flint) and on adhesive wear (in dry sliding friction). Keywords: Laser cladding; Frictional treatment; Microhardness; Abrasive wear; Adhesive wear. References 1. González R., Cadenas M., Fernández R. et al. Wear behaviour of flame sprayed NiCrBSi coating remelted by flame or by laser. Wear. 2007, Vol. 262, pp. 301–307. сталей // Перспективные материалы: учеб. пособие / под ред. Д.Л. Мерсона: – Тольятти: ТГУ. – 2011. – 434 с. – Т. IV, гл. 3. – С. 123–208. 9. Makarov A.V., Savrai R.A., Pozdejeva N.A. et al. Effect of hardening friction treatment with hard-alloy indenter on microstructure, mechanical properties, and deformation and fracture features of constructional steel under static and cyclic tension // Surface and Coatings Technology. – 2010. – Vol. 205, №. 3. – P. 841–852. 10. Вичужанин Д.И., Макаров А.В., Смирнов С.В., Поздеева Н.А., Малыгина И.Ю. Напряженно-дефор- мированное состояние и поврежденность при фрик- ционной упрочняющей обработке плоской стальной поверхности скользящим цилиндрическим инденто- ром // Проблемы машиностроения и надежности ма- шин. – 2011. – № 6. – С. 61–69.