Ferritic stainless steel sheet, method for producing same, and ferritic stainless steel member
A stainless steel and system technology, applied in the field of ferritic stainless steel plates and their manufacture, and ferritic stainless steel components, can solve the problems of poor formability of stainless steel plates, limited use and shape, limited use parts, etc., to achieve deep drawing excellent effect
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Embodiment 1
[0262] The steel with the composition shown in Table 1 is smelted, cast into slabs, hot rolled under the conditions of slab heating temperature of 1150°C, finish rolling temperature of 880°C, and coiling temperature of 500°C to produce hot rolled steel plate.
[0263] [Table 1]
[0264]
[0265] Thereafter, the pickled hot-rolled steel sheet was cold-rolled at a reduction ratio of 60% or more to the thickness shown in Table 2 using rolls with a diameter of 400 to 500 mm, and continuous annealing-pickling was performed to obtain a steel sheet . The annealing conditions at this time use the annealing temperature Tf (°C), the recrystallization start temperature Ts (°C), the heating rate from the heating start temperature to the recrystallization start temperature Ts (°C), and the recrystallization start temperature Ts (°C). ) to the annealing temperature Tf (° C.), the heating rate is a manufacturing method in the suitable range of the present invention.
[0266] [Table 2] ...
Embodiment 2
[0275] With respect to the steel types described in Table 1, hot rolling and pickling were performed under the conditions shown in Table 3, and hot-rolled sheet annealing was performed as necessary, and then cold rolling and cold-rolled sheet annealing were performed. Each production condition is shown in Table 3. In addition, the processability (deep drawability) was evaluated by the r value in the same manner as in Example 1.
[0276] [table 3]
[0277]
[0278] The chemical compositions and production methods of Examples C1 to C3 of the present invention shown in Table 3 are all within the scope of the present invention, and steel sheets with good workability (deep drawability) can be obtained. On the other hand, in Comparative Examples c1 to c7 which deviated from the preferred production conditions of the present invention, the crystal orientation strength of the steel sheet was out of the range specified in the present invention, and the workability (deep drawability...
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Abstract
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