Characterization of Microstructure of WC-6.5%Co Cladding Layer by Electric Resistance Welding

Lee, Jinwoo; Ko, Junbin; Lee, YoungHo

Journal of KWJS 2007;25(3):72-77.
Published online July 19, 2007.

저항클래딩법을 응용하여 형성된 내마모성 WC-6.5Co 클래딩층의 미크로조직 특성

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Characterization of Microstructure of WC-6.5%Co Cladding Layer by Electric Resistance Welding

Jinwoo Lee, Junbin Ko, YoungHo Lee

Abstract

This study deals with characterizations of microstructure and wear performance of a cladding layer, product on 1.9 mm-thick mild steel plate by the electric resistance welding, of composite metal powder of Coarse WC-6.5%Co and high carbon alloy (SHA). The cladding layer was examined and tested for microstructural features, chemical composition, hardness, and bondability.
The cladding layer have two different matrix were observed by an optical microscope and EPMA. The one was the coarse WC-6.5Co structure. The other was the melted SHA with surrounding the WC-6.5Co structure. The hardness of WC-6.5Co was 1210HV. The hardness of SHA was 640HV.

Key Words: Cladding, Electric resistance welding, Wear performance