STRIP CLADDING OF PROPELLER SHAFTS WITH NICKEL ALLOY 625 BY ELECTROSLAG SURFACING
A comprehensive comparison between electroslag (ESS) and submerged arc surfacing (SAS) using 30-mm-wide (1.2 in) x 0.5-mm- thick (0.20 in) nickel alloy 625 strip was conducted in both the as- deposited and stress relived (at 650oC [1200OF]) conditions. In most cases, exactly duplicate cladding conditions were used to best compare ESS with SAS. Nickel allot 625 strip was deposited on 10- cm-thick (4 in) flat plates and 64-cm-diameter (25 in) shafting using optimized ESS and SAS processes. Tension and face and side bend tests were performed on as-welded and stress-relieved cladding at room temperature. Microstructural analyses of the clad specimens were performed using optical and electron microscopy. Cladding parameters were found to affect the dilution, deposition rate, and penetration. Although ESS and SAS cladding possessed similar strength levels, the cladding deposited by ESS was shown to have greater ductility than that by SAS. Also, the resistance to solidification cracking of cladding by ESS was superior to SAS because of the reduced silicon, carbon, oxygen, and impurity levels which promote interdendritic Laves phase, niobium-rich MC carbides and inclusions. Compared with SAS, the ESS method proved to be not only more metallurgically favourable but also cost-effective.
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Supplemental Notes:
- J Ship Production, v 9 n 3, Aug 1993, p 173 [8 p, 12 ref, 8 tab, 8 fig]
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Authors:
- Devletian, J H
- Gao, Y P
- Publication Date: 1993
Language
- English
Subject/Index Terms
- TRT Terms: Cladding; Mechanical properties; Nickel alloys
- Subject Areas: Marine Transportation; Materials;
Filing Info
- Accession Number: 00717533
- Record Type: Publication
- Source Agency: British Maritime Technology
- Files: TRIS
- Created Date: Mar 4 1996 12:00AM