Laser Alloying of Multi-Carbides Reinforced Metal Matrix Coating on a Ductile Iron

Abstract:

A ductile iron coated with metal-matrix pastes containing hard phase TiC and CrxCy was laser alloyed by an Nd: YAG laser and a CO2 laser. The microstructure, composition and wear resistance were analyzed by scanning electron microscopy (SEM), incorporating energy dispersive spectrum (EDS), X-ray diffraction analysis (XRD) and friction wear tester respectively. Results revealed that the alloyed area was composed by alloyed zone and heat affected zone. The microstructure of the alloyed layer was significantly influenced by the laser beam kind. Finer grains and fewer cementites were contained in the alloyed layer produced by Nd: YAG laser. Friction and wear experiments showed that the alloyed layer had better tribology properties.

• Periodical: Advanced Materials Research (Volumes 154-155)
• Pages: 1182-1185
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.154-155.1182
• Online since: October 2010
• Authors: W.Y. WANG, Xiao Ming Dong, Jing Pei Xie
• Keywords: Crack, Ductile Iron, Laser Surface Alloying, Multi Hard Ceramic Phases

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