期刊
VACUUM
卷 217, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2023.112587
关键词
Scanning electron beam; Fast alloying; Medium carbon steel; Microstructure; Microhardness; Wear rate
This study successfully fabricated a high-performance W-Ni composite coating on medium carbon steel using scanning electron beam alloying. The microstructure and mechanical properties of the coating were found to be influenced by the process parameters.
Next-generation medium carbide steel development requires fabricating novel structural materials with superior mechanical properties. Herein, scanning electron beam alloying is proposed for obtaining a W/Ni alloy coating on medium carbon steel, and the impact of process parameters on the microstructure and properties are investigated. Results demonstrated that the microstructure of alloying zone is martensite, alpha-Fe (Ni, C) solid solution, and W3C particles scattered along the grain boundaries. The transition zone between coating and substrate exhibits multiple sublayers: different morphological martensitic and heat-affected zone. As the energy density rises, the mechanical properties of the coating initially increase and subsequently decline. The microstructural findings revealed that the formation of alpha-Fe (Ni, C) solid solution, martensitic, and carbides play a critical role in substantially enhancing mechanical properties. This work produced a high-performance W-Ni composite coating on medium carbon steel.
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