JP2003155543A5 - - Google Patents

Description

[0005]
In order to achieve the object, the ferritic stainless steel sheet of the present invention, C: 0.02 mass% or less, Si: 2.0 mass% or less, Mn: 3.0 mass% or less, P: 0.050 mass% S: 0.015% by mass or less, Cr: 8.0 to 25.0% by mass, Al: 0.10% by mass or less, N: 0.05% by mass or less, Nb: 0.05 to 0.60 The ferrite crystal grains are sized in the plate thickness direction such that (mass percentage of ferrite, the remainder substantially has the composition of Fe, (ferrite grain size number of the plate surface layer) − (ferrite grain size number of the plate thickness center) ≦ 1.5), It is characterized in that the {111} area of ferrite crystal grains having a deviation of 5 degrees or less from the {111} plane of the surface of the rolling surface is 20% or more.

Claims (5)

C: 0.02 wt% or less, Si: 2.0 wt% or less, Mn: 3.0 wt% or less, P: 0.050 mass% or less, S: 0.015 mass% or less, Cr:. 8 0 . 25 0 wt%, Al: 0.10 wt% or less, N: 0.05 wt% or less, Nb: 0.05 to 0.60 wt%, the balance has a composition of substantially Fe, (the plate Ferrite crystal grains are sized in the plate thickness direction so that the ferrite grain size number of the surface layer-(ferrite grain size number at the center of the plate thickness) ≦ 1.5, and the deviation of the surface of the rolling surface from the {111} plane is within 5 degrees A ferritic stainless steel sheet excellent in deep drawability and small in-plane anisotropy characterized in that the {111} area of ferrite crystal grains is 20% or more. When the mass ratio of Nb / (C + N) is 8.0 or more, (ferrite grain size number of the plate surface layer)-(ferrite grain size number of the plate thickness center) ≦ 1.0, the displacement of the rolling surface layer from the {111} plane is The ferritic stainless steel sheet according to claim 1, wherein the {111} area of crystal grains within 5 degrees is 25% or more. The ferritic stainless steel plate according to claim 1, further comprising one or more of Ti: 0.01 to 0.50 mass% and B: 0.0010 to 0.0100 mass%. Furthermore, Ni: 2.0 mass% or less, Cu: 3.0 mass% or less, Mo: 3.0 mass% or less, V: 0.01 to 0.30 mass%, Zr: 0.01 to 0.30 mass The ferritic stainless steel sheet according to claim 1 or 3, wherein the ferritic stainless steel sheet contains 1% or 2% or more. After deep-rolling the stainless steel which has a composition in any one of Claims 1-4, it cold-rolls by 30% or more of a rolling ratio, and also carries out intermediate annealing at 650-850 ° C. -A manufacturing method of a ferritic stainless steel sheet excellent in workability.