PURPOSE: To obtain an aluminized steel sheet with superior strength at high temp. and superior heat resistance without requiring Cr by aluminizing a cold rolled steel sheet having a regulated ratio of Ti/(C+N) ant contg. properly blended Si, Mn, etc.
CONSTITUTION: A cold rolled steel sheet consisting of 0.001W0.020% C, 0.1W2.2% Si, 0.1W2.5% Mn, 0.1W0.5% Ti [Ti/(C+N)≥10], 0.01W0.1% Al, 0.010% N and the balance Fe with inevitable impurities or further contg. 0.05W0.30% Nb is used as a base material at need. This base material is aluminized by hot dipping of other method. Since the aluminized steel sheet has superior oxidation resistance and strength at high temp., it can be used as the material of a member for an exhaust gas treating device for an automobile.
SAKAI NORIYASU
KAWASE HISAO
