Abstract
Clad steel plate has good corrosion resistance and mechanical properties arising from the hot rolling of dissimilar metals, such as carbon steel and stainless steel. However, it is difficult to simultaneously achieve good corrosion resistance from the cladding metal (stainless steel) and good mechanical properties from the base metal (carbon steel) because the different steels display opposite behaviours during the heat treatment process. Proper material selection and heat-treatment conditions are necessary for fabricating clad steel plates for application in the hulls of ships. In this study, the optimal heat-treatment conditions for maximizing the corrosion resistance of the metal (S32750) and the mechanical properties of the base metal (EH40) were investigated on the laboratory scale. The quenching and tempering method employing water quenching after treatment at 1080°C for 1h/in and air cooling after treatment at 550°C for ~1–2h was more effective than normalized heat treatment. The characteristics of the fabricated clad steel plate were evaluated using the selected heat treatment conditions.
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