Ferrite stainless steel sheet having high thermal resistance and processability, and method for manufacturing the same

• Main Authors: TERAOKA SHINICHI, KANNO NORIHIRO, INOUE YOSHIHARU, HAMADA JUNICHI
• Format: Patent
• Language: Chinese; English
• Published: 13.03.2013
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

Provided is a low-cost ferrite stainless steel sheet for an exhaust part which exhibits little deterioration in strength even after exposure to a long thermal history, wherein the ferrite stainless steel sheet comprises: less than 0.010 mass% of C; 0.020 mass% or less of N; more than 0.1 mass% and 2.0 mass% or less of Si; 2.0 mass% or less of Mn; 12.0 to 25.0 mass% of Cr; more than 0.9 mass% and 2 mass% or less of Cu; 0.05 to 0.3 mass% of Ti; 0.001 to 0.1 mass% of Nb; 1.0 mass% or less of Al; and 0.0003 to 0.003 mass% of B, wherein Cu/(Ti+Nb) is 5 or more and the balance is Fe and unavoidable impurities.