The Paton Welding Journal, 2013, №09



2013 №09 (06)

2013 №09 (08)

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The Paton Welding Journal, 2013, #9, 41-45 pages

STRUCTURE OF MULTILAYER SAMPLES SIMULATING SURFACED TOOLS FOR HOT DEFORMING OF METALS

I.A. RYABTSEV, A.A. BABINETS, G.N. GORDAN, I.I. RYABTSEV, T.V. KAJDA and L.T. EREMEEVA

E.O. Paton Electric Welding Institute, NASU. 11 Bozhenko Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua


Abstract
Structure of multilayer deposited samples, which simulate the surfaced tools for hot deforming of metals and alloys by composition of deposited metal and sizes of deposited layers, was investigated. The surfacing was performed on samples of low-alloy medium-carbon steel 40Kh. To perform surfacing of working layer, the flux-cored wire PP-Np-25Kh5FMS was used, producing deposited metal of type of tool semiheat-resistant steel. To deposit a sublayer, two wires were applied: solid wire Sv-08A or flux-cored wire PP-Np-12KhMF. The investigations showed that the deposited metal 25Kh5FMS has a structure, consisting of bainite-martensite mixture and residual austenite, structure of sublayer 12KhMF is sorbite-like pearlite, and that of sublayer, deposited by wire Sv-08A, is ferrite. It was found that depending on chemical composition and structure of deposited sublayer the residual stressed state of deposited wear-resistant layer is greatly changed. In particular, the surfacing of sublayer by flux-cored wire PP-Np-12KhMF approximately 3 times decreases the residual stresses in working wear-resistant layer. 9 Ref., 2 Tables, 7 Figures.


Keywords: arc surfacing, multilayer surfacing, structure of deposited metal, sublayer, thermal fatigue


Received:                19.06.13
Published:               28.09.13


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