Microstructure and Wear Behavior of NbC-Reinforced Ni-Based Alloy Composite Coatings by Laser Cladding
نویسندگان
چکیده
This work aims to evaluate the influence of laser power and reinforcement feeding rate on microstructure, hardness, wear behavior NbC-reinforced Hastelloy C276TM alloy composite coatings. From a dual system, one-step metal-matrix coatings were deposited with 10, 30, 50% mass NbC powder powers 1.5 3.0 kW. Coatings kW 30% showed some degree porosity due combination melting pool temperature. Laser altered efficiency substrate burn-in shape, remarkably influencing dilution. The microstructure was comprised Ni-? (FCC) dendrites interdendritic network carbide which, in turn, ranged from lamellar-like M6C blocky-like conjugated MC-M23C6 carbide. Primary petaloid-like MC [Nb] formed on, whilst considerable number unmelted particles observed for 50%. higher rate, fraction better performance low heat-input specimens. Synthesis high sheds light deleterious effect dilution is not an option enhance performance.
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ژورنال
عنوان ژورنال: Materials Research-ibero-american Journal of Materials
سال: 2021
ISSN: ['1980-5373', '1516-1439']
DOI: https://doi.org/10.1590/1980-5373-mr-2020-0447