Effect of rare earth Ce on properties of high-boron bainite coating prepared by laser cladding

doi:10.13251/j.issn.0254-6051.2021.01.025

Abstract

Abstract: High boron bainite coatings with different Ce contents were prepared by laser cladding,then the microstructure,microhardness,fracture toughness,wear performance of the costings were studied by using SEM,microhardness tester,universal tensile machine,reciprocating friction and wear tester,respectively.The results show that the grain size of primary austenite decreases,and the morphology of intergranular trellis boride is improved after Ce modification.The three-point bending fracture toughness is improved,and the fracture changes from intergranular brittle fracture to quasi-cleavage fracture.With the increase of Ce content,the average friction coefficient of the coatings decreases first and then increases,and serious fatigue peeling occurs in all the wear marks.

Key words: laser cladding, high-boron bainite coating, rare earth Ce, microstructure, properties

CLC Number:

TG142.7

Zhang Jian, Huang Daosi, Zhao Longzhi, Jiao Haitao, Tang Yanchuan, Liu Dejia, Zhao Mingjuan, Li Jin. Effect of rare earth Ce on properties of high-boron bainite coating prepared by laser cladding[J]. Heat Treatment of Metals, 2021, 46(1): 133-137.

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