DU J,LI X,XU Y L,et al. Process parameter optimization in laser cladding of nickel-aluminum bronze/hastelloy coatings[J]. Special Casting & Nonferrous Alloys,2026,46(10):1 543-1 550.
DU J,LI X,XU Y L,et al. Process parameter optimization in laser cladding of nickel-aluminum bronze/hastelloy coatings[J]. Special Casting & Nonferrous Alloys,2026,46(10):1 543-1 550.DOI: 10.15980/j.tzzz.T20250369.
Process Parameter Optimization in Laser Cladding of Nickel-aluminum Bronze/ Hastelloy Coatings
Pre-placed powder laser cladding technique was employed to fabricate Hastelloy C276 coatings on the surface of nickel–al
uminum bronze(NAB), and the effects of laser power, scanning speed, and powder thickness on the dilution rate of coating were systematically analyzed using response surface methodology.The results indicate that the cladding layer is uniform and dense with significantly refined grains under optimal parameters (laser power of 3 000 W, scanning speed of 11 mm/s, and powder thickness of 0.8 mm). The microstructure is transformed from equiaxed grains at the surface to columnar dendrites at the center, and coarse columnar dendrites are formed with abundant cellular grains at the bottom. The average microhardness of coating reaches 303.9 HV
0.1
, which is increased by 91.1% compared to that of NAB substrate.
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