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- W2350424229 abstract "Laser cladding Ni-based tungsten carbide alloy coatings were fabricated on NAK80 mould steel substrate using a Nd: YAG laser and a CO2 laser.The phase structure,morphology and elemental composition of the two kinds of laser cladding coatings were analyzed by means of X-ray diffraction,scanning electron microscopy and energy dispersive spectrometry.Moreover,the microhardness and wear resistance of the laser cladding coatings were evaluated using a hardness meter and a friction and wear tester.It was found that both the two kinds of laser cladding coatings were combined with the substrate via chemical metallurgical bonding.Both the two kinds of laser cladding coatings mainly contained coarse unmelted tungsten carbide particles and evenly distributed dendrites,while the coating prepared with Nd: YAG laser had finer structure than the one prepared with CO2 laser.Besides,they were mainly composed of WC,W2C,Cr23C6,NiCr,CrB2 and γ-Ni.In the meantime,laser cladding with the two types of lasers helped to significantly increase the hardness and wear resistance of the mould steel,and the laser cladding coating obtained with a CO2 laser had higher hardness and wear resistance.Moreover,the wear mechanisms of the two kinds of laser cladding coatings were both dominated by abrasive wear." @default.
- W2350424229 created "2016-06-24" @default.
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- W2350424229 date "2012-01-01" @default.
- W2350424229 modified "2023-09-23" @default.
- W2350424229 title "Comparison of Microstructure and Wear Resistance of Laser Cladding Nickel- Based Tungsten Carbide Alloy Coatings Prepared on NAK80 Mould Steel Substrate Using Two Kinds of Lasers" @default.
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