Process for preparing alloyed-zinc-plated titanium-killed...

Details Process for preparing alloyed-zinc-plated titanium-killed... Process for preparing alloyed-zinc-plated titanium-killed...

C - Chemistry, Metallurgy

23

C

148/47, 117/82

C23C 16/02 (2006.01) C21D 9/48 (2006.01) C23C 14/58 (2006.01) C23C 14/16 (2006.01)

Patent

CA 1331852

Abstract of the Invention There is disclosed a process for preparing alloyed-zinc-plated steel sheet having excellent deep drawability, which comprises adjusting the temperature of substrate steel sheet of titanium-killed steel essentially consisting of C?0.01%, Si<0.15%, Mn: 0.15-0.85%, Ti: 0.05-0.30%, P?0.02%, S?0.02%, Al?0.05% and balance of Fe, to a temperature within a temperature range T (C) defined as 180?T?- 240xW+292, wherein W(%) is the Ti content of the substrate steel sheet, subjecting said steel sheet to Zn-plating by vacuum vapor deposition, and thereafter maintaining the plated steel sheet for alloying the plating zinc layer and the substrate steel at 220-320°C for 1-50 hours in accordance with Ti content of the substrate steel. This process provides alloyed zinc-plated steel sheets having excellent drawability and powdering resistance.

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