AMORPHOUS/NANOCRYSTALLIZATION OF TiN-TiB2 REINFORCED LASER CLAD COMPOSITES

Molin Su, Jianing Li, Xuegang Wang and Zhiyuan Liu
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Molin Su: School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, P. R. China
Jianing Li: School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, P. R. China
Xuegang Wang: School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, P. R. China
Zhiyuan Liu: School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, P. R. China

Surface Review and Letters (SRL), 2019, vol. 26, issue 09, 1-4

Abstract: Laser cladding (LC) of the Stellite6-BN-Cu-Y2O3 pre-placed powders on the Ti-6Al-4V alloy substrate formed the bulk TiN and needle-like Ti-B compounds reinforced composites, which improved the wear resistance of the substrate surface. The results showed that lots of the amorphous-nanocrystalline phases were produced in such composites; the proper content of Cu was used to refine microstructures, also a large number of the nanocrystals can be formed; the elements such as Co, Ni and Fe in Stellite6 favored the amorphous phase to be formed. The addition of Y2O3 improved the fluidity of the liquid metal, also retarding the growth of the dendrite, leading the fine microstructures to be formed, improving the property of the LC composites.

Keywords: Laser cladding; amorphous phase; surface modification; nanocrystals (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1142/S0218625X19500574

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