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2010•Unpublished venueRequires access

Microstructure of Co-based Alloy Coating Prepared by Laser Cladding

Songhua Si

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Abstract

Laser cladding coating with pre-painted Co-based alloy was prepared on low carbon steel surface.The microstructure and phase structure of the cladding layer were characterized using OM,SEM and XRD.The results show that γ-Co dendrite mainly exists in the coatings.γ-Co + Cr23C6 eutectic exist among the dendrites.There are some crystallization morphologies in different zones,such as planar,cellar,columnar and twin microstructure.Under the same technologies,the dendrite microstructure is fined with the increase of scanning velocity.

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What this paper is about

Laser cladding coating with pre-painted Co-based alloy was prepared on low carbon steel surface.The microstructure and phase structure of the cladding layer were characterized using OM,SEM and XRD.The results show that γ-Co dendrite mainly exists in the coatings.γ-Co + Cr23C6 eutectic exist among the dendrites.There are some crystallization morphologies in different zones,such as planar,cellar,columnar and twin microstructure.Under the same technologies,the dendrite microstructure is fined with the increase of scanning velocity.

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Available abstract

Laser cladding coating with pre-painted Co-based alloy was prepared on low carbon steel surface.The microstructure and phase structure of the cladding layer were characterized using OM,SEM and XRD.The results show that γ-Co dendrite mainly exists in the coatings.γ-Co + Cr23C6 eutectic exist among the dendrites.There are some crystallization morphologies in different zones,such as planar,cellar,columnar and twin microstructure.Under the same technologies,the dendrite microstructure is fined with the increase of scanning velocity.

Key concepts: Microstructure, Materials science, Eutectic system, Coating, Alloy, Dendrite (mathematics), Cladding (metalworking), Composite material

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