| 摘要 |
PROBLEM TO BE SOLVED: To provide a cold rolled steel sheet having excellent shape freezing property and baking hardenability. SOLUTION: The cold rolled steel sheet with excellent shape freezing property and bake hardenability satisfies, in the sheet surface at least at 1/2 of sheet thickness, the following: (1) the average value (A) of the X-ray random intensity ratios of ä100}<011> to ä223}<110> orientation groups is≥4; (2) the average value (B) of the X-ray random intensity ratios of the crystal orientations of ä554}<225>, ä111}<112> and ä111}<110> is≤6; and (3) (A)/(B)≥1.2. Further, at least either of the the r-value in a rolling direction and the r-value in a direction perpendicular to the rolling direction is≤0.7, and the amount of BH is≥50 MPa. COPYRIGHT: (C)2005,JPO&NCIPI
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