| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high rigidity steel sheet having an increased Young's modulus in the 35 to 75° direction to the rolling direction of the steel sheet, and to provide a method for producing the same. Ž<P>SOLUTION: The high rigidity steel sheet has a composition containing, by mass, >1.50% to ≤10.00% Al, further one or more selected from Bi, Pb, Sb and Sn, and suitable amounts of C and Mn, and in which the contents of Si, P, S and N are properly limited, and the balance Fe with inevitable impurities, wherein the pole density of the ä110}<001> in the 1/4 layer of the sheet thickness is ≥6, and sheet thickness is ≥0.5 mm. Also, a production method is disclosed where, after hot rolling at a finishing temperature of <800°C, hot rolled sheet annealing is performed at the maximum temperature of ≥800°C or hot rolling in which the total draft at a finishing temperature of 800 to 890°C is limited to <50% is performed, and, after cold rolling at a draft of 20 to 80%, final annealing at the maximum temperature of ≥850°C is performed. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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