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A Study on the Surface Characterization of Fe-17wt.%Cr Steel for Cast-bonding of Al and Stainless Steel  

Kim, Eok-Soo (The school of Materials Science and Engineering, University of Ulsan)
Publication Information
Journal of Korea Foundry Society / v.25, no.3, 2005 , pp. 134-141 More about this Journal
Abstract
To overcome the undesirable deformation, peeling off and geometrical restrictions which were mainly caused by differences in thermal expansion coefficients during the cladding of aluminum strip and stainless strip, new processing method based on vacuum die casting is designed and implemented in fabricating Al/Fe-17wt%Cr steel(stainless steel). To increase cast-bonding ability, the surface of Fe-17wt%Cr steel is electrochemically etched to have optimum pit size and density. The optimum conditions to generate best pit are as follows: Solution: 1 M $Fecl_{3}$+1 M Nacl, Addition: $CuCl_{2}+HCl$, Current density: 80 $mA/cm^{2}$, Total current: 400 $coulomb/cm^{2}$, AC frequency :60 Hz.
Keywords
Cast-bonding; Al-STS steel; Electrochemical etching; Pit size and density;
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