FERRITIC STAINLESS STEEL SHEET, METHOD FOR PRODUCING FERRITIC STAINLESS STEEL SHEET, AND AUTOMOBILE EXHAUST SYSTEM PARTS

• Main Authors: ABE MASATOSHI, HAYASHI ATSUTAKA, JINNO NORIHIRO
• Format: Patent
• Language: English; Japanese
• Published: 27.12.2021
• Subjects: ALLOYS; BLASTING; CHEMISTRY; ENGINE PLANTS IN GENERAL; FERROUS OR NON-FERROUS ALLOYS; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; STEAM ENGINES; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

To provide a ferritic stainless steel sheet that is excellent in workability and high temperature salt damage resistance, and to provide a method for producing ferritic stainless steel sheet and automobile exhaust system parts.SOLUTION: Provided are a ferritic stainless steel sheet that has a predetermined chemical composition and satisfies formulas (i) to (iii), and automobile exhaust system parts using the same. Al+1.7Si+0.8Mo+0.3DA-0.5≤6.2 -- formula (i) 2.6Al+4.3Si+1.5Mo≥6.05 -- formula (ii) Al/O≥200 -- formula (iii) {The element symbol in the formula means the contained amount (mass%) of the element, and DA means the average crystal grain size (mm) at the center part of the plate thickness.}.SELECTED DRAWING: Figure 1 【課題】加工性および耐高温塩害性に優れたフェライト系ステンレス鋼板、フェライト系ステンレス鋼板の製造方法および自動車排気系部品を提供する。【解決手段】所定の化学組成を有し、式（ｉ）〜（ｉｉｉ）を満足するフェライト系ステンレス鋼板、およびそれを用いた自動車排気系部品。Ａｌ＋１．７Ｓｉ＋０．８Ｍｏ＋０．３ＤＡ−０．５≦６．２・・・式（ｉ）２．６Ａｌ＋４．３Ｓｉ＋１．５Ｍｏ≧６．０５・・・式（ｉｉ）Ａｌ／Ｏ≧２００・・・式（ｉｉｉ）｛式中の元素記号は当該元素の含有量（質量％）を意味し、ＤＡは板厚中心部における平均結晶粒径（ｍｍ）を意味する。｝【選択図】図１