Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8023747 | Surface and Coatings Technology | 2018 | 32 Pages |
Abstract
The effects of duty cycle and pulse frequency on the carbide size and properties of in-situ TiC-VC reinforced Fe-based cladding layers were studied. Heat input increased and carbide particle sizes decreased with increasing numbers of duty cycles. As the pulse frequency increased from 5â¯Hz to 5000â¯Hz, carbide particle sizes first increased and then decreased. Carbide refinement was mainly induced by a rapid cooling rate at low pulse frequencies, and high-speed Marangoni flow in the molten pool at high pulse frequencies. The hardness and corrosion resistance of cladding layers varied inversely with carbide particle size. The 5â¯Hz cladding layer had the highest hardness and best corrosion resistance, while the 500â¯Hz layer showed poor properties because of carbide agglomeration.
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Authors
Hui Zhang, Kai Chong, Wei Zhao, Zhiping Sun,