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Application filed by Yieh United Steel CorpfiledCriticalYieh United Steel Corp
Priority to TW92128909ApriorityCriticalpatent/TWI240008B/en
Publication of TW200514855ApublicationCriticalpatent/TW200514855A/en
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Publication of TWI240008BpublicationCriticalpatent/TWI240008B/en
This invention provides a kind of ferrite stainless steel with good thermal processability and anti-bacterial effect, which comprises carbon of 0.001%-0.1%, silicon (Si) of 0.2%-1.0%, magnesium (Mn) of 0.001%-1.0%, chromium (Cr) of 11.0%-20.0%, nitrogen (N) of 0.001%-0.1%, copper (Cu) of 1.0%-3.5% and balance of iron (Fe) and unavoidable trace elements in the steel-making process. The individual element composition is to make the value of the equation for calculating Martensitic phase to be a maximum value of 50. The equation is γph = 420 x %C - 11.5 x %Si + 7 x %Mn + 23 x %Ni + 11.5 x % Cr - 12 x %Mo + 9 x %Cu - 49 x %Ti - 52 x % Al + 470 x %N + 189. There is at least one annealing process carried out after the hot rolling process to generate precipitation of the second phase with copper as main component (called copper-rich phase hereafter) so that the ferrite stainless steel has excellent thermal processability and also exhibits anti-bacterial effect, in which the anti-bacterial effect does not deteriorate due to surface abrasion.
TW92128909A2003-10-172003-10-17Ferrite stainless steel with good hot workability and antiseptic effect
TWI240008B
(en)