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

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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.

Keywords:laser cladding, maraging steel, age-hardening, microstructure, microhardness, residual stress, EDS analysis
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Number of pages:str. [1-12]
Numbering:Vol. 8, no. 5
ISSN on article:1546-962X
DOI:10.1520/JAI103435 Link is opened in a new window
COBISS.SI-ID:12049435 Link is opened in a new window
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Record is a part of a journal

Title:Journal of ASTM International
Publisher:ASTM International
COBISS.SI-ID:9763606 This link opens in a new window

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