Automatic Welding, 2016, №11



2016 №11 (03)

DOI of Article 10.15407/as2016.11.04

2016 №11 (05)

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Avtomaticheskaya Svarka (Automatic Welding), #11, 2016, pp. 26-34
 

Peculiarities of bead shape regulation in single-layer microplasma surfacing on edges of aircraft gas turbine engine blades

P.D. Zhemanyuk¹, I.A. Petrik¹, S.L. Chigilejchik¹, A.V. Yarovitsyn² and G.D. Khrushchov²

¹JSC «Motor Sich» 15 Motorostroiteley Str., 69068, Zaporozhe, Ukraine. E-mail:motor@motorsich.com
² E.O. Paton Electric Welding Institute, NASU 11 Kazimir Malevich Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
 
Abstract
It is a necessary to specify the dependencies of deposited metal shaping due to the need of 5–15 mm height increase of the dimensions of surfacing-repaired damaged areas of blade edges of aircraft GTE of high-temperature nickel alloys in microplasma bead surfacing on narrow substrate of less than 3 mm. A range of change of the process energy indices in «effective heat power of arc–heat input–cross-section area of deposited bead» system was investigated for conditions of corresponding single-layer surfacing, and effectiveness of process regulation of deposited layer cross-section was evaluated. It is determined that heat input change in 100–1600 J/mm range is the most effective regulation of cross-section area of the deposited bead under conditions of base metal limited penetration depth. It is assumed that the determined process relationship between heat input energy, height and cross-section area of the deposited bead will promote for formation of the additional criteria preventing crack formation in the «base–deposited metal» welded joint in repair of the parts of aircraft engines of high-temperature nickel alloys using multi-layer microplasma powder surfacing. 18 Ref., 4 Tables, 8 Figures.
 
Keywords: microplasma powder surfacing, high-temperature nickel alloy and heat-resistant cobalt alloy, narrow substrate, effective heat power of arc, heat input, thermal efficiency, cross-section area of deposited bead
 
 
Received:                06.07.16
Published:               14.12.16
 
 
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