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Laser cladding and heat treatment of Ni-Co-Mo maraging steel
Bergant, Zoran (Avtor), Slabe, Janez Marko (Avtor), Ocaña, Jose Luis (Avtor), Grum, Janez (Avtor)

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Izvleček
The subject of this paper is a surface-integrity analysis of Ni-Co-Mo laser cladded maraging steel (EN 10027-2, W. No. 1.2799). Experiments were performed on 3.3 kW Nd:YAG laser system with coaxial injection of Ni-Co-Mo powder alloy that integrates various modes of laser beam guidance and different degrees of overlapping. The specimens were subsequently solution and precipitation annealed in order to examine a precipitation hardening of the newly formed material using the scanning electron microscopy (SEM) with a microprobe for energy-dispersive spectroscopy analysis, supported by microhardness tests. The residual stresses were determined by a hole-drilling method, using the integral method for residual stresses calculation. Favourable compressive residual stresses are generated in laser cladded layers due to a phase transformation from austenite to lath-martensite. The optimal selection of laser cladding process parameters enables efficient and cost-effective maintenance of damaged surfaces on the vital parts of die-casting tools, made from 1.2799 maraging steel.

Jezik:Angleški jezik
Ključne besede:laser cladding, maraging steel, age-hardening, microstructure, microhardness, residual stress, EDS analysis
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2011
Št. strani:str. [1-12]
Številčenje:Vol. 8, no. 5
UDK:621.791.725
ISSN pri članku:1546-962X
DOI:10.1520/JAI103435 Povezava se odpre v novem oknu
COBISS.SI-ID:12049435 Povezava se odpre v novem oknu
Število ogledov:630
Število prenosov:180
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Gradivo je del revije

Naslov:Journal of ASTM International
Založnik:ASTM International
ISSN:1546-962X
COBISS.SI-ID:9763606 Novo okno

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