期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 772, 期 -, 页码 719-727出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.09.122
关键词
High speed steel; Medium entropy alloy; Hot wear resistance; Laser cladding
资金
- National Natural Science Foundation of China (NSFC) [U1560105]
- State Key Laboratory of Solid Lubricating [LSL-1714]
The microstructure and hot wear resistance of a laser cladded novel medium-entropy high speed steel (ME-HSS) coating, by increasing the content of alloying elements Mo, V, Co, Ni and Al in a commercialized W6Mo5Cr4V2 (M2) HSS, are studied here. The results show that the newly designed ME-HSS coating has less amount of undesired retained austenite, and enhanced secondary hardening effect with more nano-size M2C carbide precipitates after tempering, in comparison with the M2 coating. In particular, the tempered ME-HSS coating exhibits excellent oxidative wear resistance at 500 degrees C because of the high content of anti-oxidation elements like Co, Ni and Al, leading to the formation of a more continuous and compact oxidation film on its worn surface. (C) 2018 Elsevier B.V. All rights reserved.
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