Ferritic stainless steel and method for manufacturing the same
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United States of America Patent
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Jan 9, 2018
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app pub date -
Oct 22, 2013
filing date -
Oct 22, 2012
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Abstract
Provided are a ferritic stainless steel having a corrosion resistance at a certain level or more and a temper-color removal performance at a certain level or more and a method for manufacturing the ferritic stainless steel. A ferritic stainless steel has a composition containing, by mass %, C: 0.001% to 0.030%, Si: 0.03% to 0.30%, P: 0.05% or less, S: 0.01% or less, Cr: more than 22.0% to 28.0%, Mo: 0.2% to 3.0%, Al: 0.01% to 0.15%, Ti: more than 0.30% to 0.80%, V: 0.001% to 0.080%, and N: 0.001% to 0.050%; Mn: 0.05% to 0.30% and Ni: 0.01% to 5.00%, or Mn: 0.05% to 2.00% and Ni: 0.01% to 0.30%; Nb: 0.05% or less as an optional component; and the balance being Fe and inevitable impurities, and the steel has a surface where TiN having a grain diameter of 1 μm or more is distributed at a density of 30 particles/mm2 or more.
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