FE-BASED METAL SHEET AND MANUFACTURING METHOD THEREOF

摘要

A cast slab containing C: less than 0.02 mass % and made of an Fe-based metal of an α-γ transforming component is subjected to hot rolling at a temperature of an A3 point or higher and is subjected to α-region rolling at a temperature of 300° C. or higher and lower than the A3 point, and thereby a base metal sheet having a {100} texture in a surface layer portion is fabricated. Then, by performing a heat treatment under predetermined conditions, an Fe-based metal sheet is obtained in which a Z value is not less than 2.0 nor more than 200 when intensity ratios of respective {001}<470>, {116}<6 12 1>, and {223}<692> directions in a sheet plane by X-ray diffraction are set to A, B, and C respectively and Z=(A+0.97B)/0.98C is satisfied.

主权项

1. An Fe-based metal sheet, comprising:
less than 0.2 mass % C and having a composition that is capable of causing an α-γ transformation, wherein: a ferrite-forming element being Si is alloyed on a partial or whole region of the Fe-based metal sheet, and
when intensity ratios of respective {001}<470>, {116}<6 12 1>, and {223}<692> directions in a sheet plane by X-ray diffraction are set to A, B, and C respectively and Z=(A+0.97B)/0.98C is satisfied, a Z value is not less than 2.0 nor more than 200;wherein at least a partial region including surfaces of the Fe-based metal sheet is an α single phase region that is alloyed with said ferrite-forming element, and a ratio of the α single phase region to a cross section of the Fe-based metal sheet is 1% or more.