Journal
MATERIALS & DESIGN
Volume 159, Issue -, Pages 224-231Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2018.08.050
Keywords
High speed steel; Coating; Medium-entropy alloy; Secondary hardening; Martensite
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Funding
- Joint Fund of Iron and Steel Research by National Natural Science Foundation of China (NSFC) [U1560105]
- Open Fund from State Key Laboratory of Solid Lubricating [LSL-1714]
- NSFC [51271001]
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Novel Fe-68(MoWCrVCoNiAlCu)(32) (at.%) medium-entropy high-speed steel (ME-HSS) coatings, containing various carbon contents from 0.65 to 1.05 wt%, are prepared by laser rapid solidification. The newly prepared ME-HSS coatings are characterized by a hard martensitic matrix enhanced by secondary hardening, and specifically by coherent nano-sized M2C. The secondary hardening effect is enhanced with the increasing carbon content. The high amount of alloying elements in ME-HSS coatings results in excellent oxidative wear resistance, without leading to serious compositional segregation and coarsening of carbides. (C) 2018 Elsevier Ltd. All rights reserved.
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