Enhanced abrasion resistance of laser cladding Fe-based coatings by addition of MgAl2O4 particles

Author:

Li Liangxun12ORCID,Sang Shaobai12ORCID,Zhu Tianbin12,Li Yawei12,Wang Heng12

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

Publisher

SAGE Publications

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