Microstructure and properties of cold-sprayed metal coating optimized by heat-treatment: A review

doi:10.13251/j.issn.0254-6051.2023.10.004

Abstract

Abstract: Cold gas dynamic spray, also known as cold spray (CS), is a solid-state deposition technology based on spraying material plastic deformation, which can be used for the preparation of functional coatings on the surface of metal components and metal additive manufacturing/remanufacturing. However, there are still problems including high porosity, weak interface bonding and poor plasticity in cold spraying technology. Subsequent heat treatment is often used as an effective means to regulate the microstructure and performance of cold spraying deposition layers. Therefore, the current research status of using subsequent heat treatment to control the microstructure and properties of cold sprayed metal deposition coating was reviewed. Through heat treatment, the microstructure, phase and stress state of the cold sprayed deposition coating can be optimized, thereby improving the microhardness, wear/corrosion resistance, thermal/electrical conductivity, strength and plasticity of the deposition coating.

Key words: heat treatment, cold spray, porosity, interfacial bonding, property

CLC Number:

TG166.2

Li Bo, Wang Hao, Liu Bo, Wu Lijuan, Zhang Qunli, Yao Jianhua. Microstructure and properties of cold-sprayed metal coating optimized by heat-treatment: A review[J]. Heat Treatment of Metals, 2023, 48(10): 29-36.

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