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Abstract：
In present study, Fe-based composite layers were fabricated on steel substrate by laser cladding with or without the addition of Nb and B4C in Fe-based alloy powders. The phase composition, microstructure evolution, microhardness and wear properties of Fe-based composite layers were studied. The results showed that the phases in the Fe-based composite layer were mainly alpha-Fe, Fe2B, Cr7C3 and Cr23C6. The addition of Nb and B4C resulted in the in-situ formation of NbC phase, an increase in the amount of Fe2B phase, and the refinement of the microstructure in the Fe-based composite layer. The microhardness of the Fe-based composite layer was increased by 269.5 HV0.5 and the wear resistance was improved to about 1.5 times the original wear resistance when the 5% Nb and 5% B4C powders were added. The wear mechanisms of both two Fe-based composite layers were abrasive wear and adhesive wear. (C) 2019 Elsevier B.V. All rights reserved.
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JOURNAL OF ALLOYS AND COMPOUNDS
ISSN： 0925-8388
Year： 2019
Volume： 802
Page： 373-384
6 . 2 0 0
JCR@2022
ESI Discipline： MATERIALS SCIENCE;
ESI HC Threshold：211
JCR Journal Grade：2
Cited Count：
WoS CC Cited Count： 56
SCOPUS Cited Count： 58
ESI Highly Cited Papers on the List： 0 Unfold All
WanFang Cited Count：
Chinese Cited Count：
30 Days PV： 2
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