한국주조공학회

Decarburization phenomena of SM50C steel casted in ceramic mold was investigated. As result, decarburized depth increased by increased by increasing the volume-to-surface area ratio and mold temperature. And the relations between them is y(cm)=(1.96x10^{-5}T+0.0135)xM- 1.05x10^{-5}T+9.73x10^{-3}. When mold is controlled by Ar ags, reducing atmosphere, decarburized depth is decreased. In case of adding graphite powder in the mold, decarburization is decreased more. Specially, when graphite powder is added on the mold materials and the wax is layed on the mold, decarburization is almost prevented.