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发明授权
CN104736734B 铁素体系不锈钢及其制造方法 有权

铁素体系不锈钢及其制造方法
摘要：
本发明提供具有一定水平以上的耐腐蚀性并且还具有一定水平以上的回火色除去性的铁素体系不锈钢及其制造方法。使用一种铁素体系不锈钢，其特征在于，以质量％计，含有0.001～0.030％的C、0.03～0.30％的Si、0.05％以下的P、0.01％以下的S、超过22.0％且在28.0％以下的Cr、0.2～3.0％的Mo、0.01～0.15％的Al、超过0.30％且在0.80％以下的Ti、0.001～0.080％的V和0.001～0.050％的N，进一步含有0.05～0.30％的Mn和0.01～5.00％的Ni或者含有0.05～2.00％的Mn和0.01～0.30％的Ni，进一步含有0.05％以下的Nb作为任选成分，余量由Fe和不可避免的杂质构成，在表面上以30个/mm2以上的密度分布有粒径为1μm以上的TiN。
摘要（英）：

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 used 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/mm 2 or more.

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