| The effects of recrystallized and rolling textures obtained by two kinds of double step cold rolling schedules with intermediate annealing on the formability of commercial 17% Cr ferritic stainless steel sheets were examined by the plastic strain ratios and earing behavior in deep-drawing. The relation between average plastic strain ratio and textures was qualitatively interpreted. The optimum condition of high average plastic strain ratio, low anisotropy, and high yield strength was found at 50-50% reduction for 86% of total reduction process ( r￣＝1.24, Δr＝0.88, Y.S.＝38.4kg/㎟, U.T.S.＝52.1kg/㎟), and 63%-76% reduction for non-specified total reduction process ( r￣＝1.36, Δr＝0.97, Y.S.＝40㎏/㎟). Qualitative agreement in r￣ values between experimental and calculated values were satisfactory. With increasing total cold reduction of double step cold rolling, yield strength and ultimate tensile strength increased because of texture component, and the longitudinal strength was superior to the transverse strength due to (001) [110] texture. The hardness and work hardening exponent were not influenced by the rolling reduction and texture. |
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