FERRITIC STAINLESS STEEL SHEET EXCELLENT IN INTERGRANULAR CORROSION RESISTANCE

Japanese Patent JP2016164309

A

PROBLEM TO BE SOLVED: To provide a method for enhancing intergranular corrosion resistance of a ferritic stainless steel by suppressing generation of chromium carbide without using titanium (Ti) or niobium (Nb) having stronger carbon affinity than chromium (Cr) used for suppressing intergranular corrosion.SOLUTION: In a composition of a ferritic stainless steel, molybdenum (Mo), silicon (Si) and manganese (Mn) having weaker carbon affinity than that of chromium (Cr) are composite added, a molybdenum (Mo)-silicon (Si)-manganese (Mn)-carbon (C)-based intergranular compound is produced in a grain boundary and the periphery thereof to fix carbon inside of a steel material and condensation of chromium (Cr) generated on the grain boundary and shortage phenomenon thereby are suppressed. There is provided a ferritic stainless steel consisting of, by mass%, 10≤Cr≤14%, C≤0.02%, N≤0.02%, P≤0.04%, S≤0.01%, 0.05≤Mo≤2.0%, 0.2≤Si≤1.5% and 0.1≤Mn≤1.0% and the balance Fe with inevitable impurities.SELECTED DRAWING: Figure 2

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KIM KYOO-YOUNG
PARK JIN HO
SEO HYUNG SUK

JP2016034650A

September 08, 2016

February 25, 2016

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POSCO
POSTEC ACAD IND FOUND

C22C38/00; C22C38/22

JPH07150301A	1995-06-13
JPH09291342A	1997-11-11
JP2004285393A	2004-10-14
JPH06184637A	1994-07-05
JPH07268554A	1995-10-17
JPH07268468A	1995-10-17
JPH08170155A	1996-07-02
JPH10280035A	1998-10-20
JP2012077382A	2012-04-19
JP2006193770A	2006-07-27
JP2016089272A	2016-05-23

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