TPWJ, 2019, #7, 36-40 pages
Journal The Paton Welding Journal
Publisher International Association «Welding»
ISSN 0957-798X (print)
Issue #7, 2019 (July)
Flux-cored wire for restoration surfacing of worn surfaces of railway wheels
V.D. Poznyakov, A.A. Gajvoronsky, A.V. Klapatyuk, A.S. Shishkevich and V.A. Yashchuk
E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: email@example.com
Research was performed and flux-cored wire of PP-AN180MN/98 grade was developed for restoration surfacing of worn areas of advanced higher-strength railway wheels. A set of physicomechanical properties of the deposited metal was determined. It is found that at application of PP-AN180MN/98 wire for surfacing higher-strength wheels, irrespective of preheating temperature and number of deposited layers, deposited metal hardness is optimum (0.94–1.0 of rail hardness). Here, a comparatively homogeneous bainite-martensite structure forms in all the joint areas (in the deposited metal, fusion zone and overheating area of HAZ metal). The deposited metal features a high level of resistance to brittle fracture and wear at sliding friction in contact with rail steel. Obtained research results lead to the conclusion that at application of flux-cored wire PP-AN180MN/98 for surfacing, the restored wheels will have a high reliability, and traffic safety will be ensured under the conditions of increasing operating loads. 17 Ref., 5 Tables, 4 Figures.
Keywords: electric arc surfacing, railway wheel, flux-cored wire, structure, mechanical properties, brittle fracture, wear
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