STEEL MATERIAL EXCELLENT IN CORROSION RESISTANCE AND MAGNETIC PROPERTIES AND METHOD OF PRODUCING THE SAME

• Main Author: MASUMOTO KEI
• Format: Patent
• Language: English; Japanese
• Published: 23.10.2014
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CHEMISTRY; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; INDUCTANCES; MAGNETS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

PROBLEM TO BE SOLVED: To provide a steel material having corrosion resistance superior to that of an electromagnetic stainless steel and excellent magnetic properties at a moderate price.SOLUTION: There is provided the steel material excellent in corrosion resistance and magnetic properties satisfying C:0.001 to 0.025% (mass%, same below for chemical components), Si:1.0 to 4.0%, Mn:0.1 to 1.0%, P:0.030% or less (excluding 0%), S:0.10% or less (excluding 0%), Cr:4.0% or less (excluding 0%), Al:0.010% or less (excluding 0%) and N:0.01% or less (excluding 0%), the balance comprising iron and inevitable impurities. In the steel material, an oxidized film containing Si and/or Cr and an amorphous layer and having a thickness of 50 to 500 nm is formed on a surface of the steel material. 【課題】電磁ステンレス鋼を超える耐食性と、優れた磁気特性とを兼備した鋼材を安価に提供する。【解決手段】Ｃ：０．００１〜０．０２５％（質量％の意味。化学成分について以下同じ）、Ｓｉ：１．０〜４．０％、Ｍｎ：０．１〜１．０％、Ｐ：０．０３０％以下（０％を含まない）、Ｓ：０．１０％以下（０％を含まない）、Ｃｒ：４．０％以下（０％を含まない）、Ａｌ：０．０１０％以下（０％を含まない）、およびＮ：０．０１％以下（０％を含まない）を満たし、残部が鉄および不可避不純物からなり、かつ鋼材表面に、Ｓｉおよび／またはＣｒを含みかつ非晶質層を含む、厚みが５０〜５００ｎｍの酸化被膜が形成されていることを特徴とする耐食性と磁気特性に優れた鋼材。【選択図】なし