Affiliation:
1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, China
2. National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan, China
Abstract
In this study, MgAl2O4 particles were introduced into Fe-based laser cladding coatings on the surface of the GCr15 steel roller, and the effects of MgAl2O4 content on the phase composition, microstructure, hardness and abrasion resistance of Fe-based coating were systematically investigated. The results showed that the well-bonded Fe-based coatings with the addition of MgAl2O4 particles were successfully prepared by laser cladding. The addition of MgAl2O4 particles promoted the formation of other hard-reinforced phases, such as Fe3Al and (Fe, Cr)7C3, playing an important role in grain refinement. Compared with the Fe-based coating, the hardness and abrasion resistance of Fe-based coatings with 30 wt% MgAl2O4 were evidently enhanced, which is attributed to the more hard-reinforced phase's dispersion strengthening and grain refinement.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Hubei Province