발간논문

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Vol.44, No.1, 30 ~ 37, 2006
Title
Hardness and Corrosion Resistance of Surface Composites Fabricated by High-energy Electron-beam Irradiation of Fe-based Amorphous Alloy Powders
손창영 Chang Young Son , 이규홍 Kyu Hong Lee , 김진석 Jin Suk Kim , 이성학 Sung Hak Lee , 김규영 Kyu Young Kim , 김충년 Choong Nyun Paul Kim
Abstract
Hardness and corrosion resistance of surface composites fabricated by high-energy electron-beam irradiation of Fe-based amorphous alloy powders were investigated. Amorphous powders were deposited on a plain carbon steel substrate, and then electron beam was irradiated on these powders without flux to fabricate a one-layered surface composite. A two-layered surface composite was also fabricated by irradiating electron beam again onto the powders deposited on the one-layered surface composite. The two-layered composite contained a large amount (up to 48 vol.%) of hard Cr2B crystalline phases in the Cr0.19Fe0.7Ni0.11 matrix, and thus its hardness was 3 times greater than that of the steel substrate. The corrosion resistance of the two-layered composite was better than that of an stainless steel or a coating fabricated by high-velocity oxygen fuel spraying of Fe-based amorphous powders because it contained Cr2B phases having good corrosion resistance without pores or cracks. These findings suggested that various applications of the fabricated surface composites to materials requiring high resistance to wear and corrosion were expected.
Key Words
High-energy electron beam irradiation, Surface composite, Amorphous alloy powder, Corrosion resistance
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