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COLD ROLLED STEEL SHEET FOR DEEP DRAWING EXCELLENT IN DENT RESISTANCE AND SECONDARY WORKABILITY
COLD ROLLED STEEL SHEET FOR DEEP DRAWING EXCELLENT IN DENT RESISTANCE AND SECONDARY WORKABILITY
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机译：深冷拔冷轧钢板，具有出色的抗凹痕性和二次加工性能
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摘要
PROBLEM TO BE SOLVED: To produce a steel sheet for deep drawing excellent in dent resistance, surface deformation resistance and secondary workability, and to provide the producing method therefor. ;SOLUTION: In this steel sheet, the average composition between the surface and a position at a depth of 10% of sheet thickness consists of, by weight ratio, ≤0.005% C, N in an amount larger by 0.001-0.05% than the average amount of N in the central part of sheet thickness, ≤0.5% Mn, ≤0.3% Si, ≤0.1% P, 0.005-0.2% Al, 0.02-0.1%, in total, of either or both of Ti and Nb, and the balance Fe with inevitable impurities, and further, the average hardness is 180-300 by Vickers hardness and also the average hardness in the part between the surface and a position at a depth of 3% of sheet thickness is ≤180 by Vickers hardness. Moreover, the average composition in the part between the position at a depth of 15% of sheet thickness from the surface layer and the center of sheet thickness consists of ≤0.005% C, ≤0.01% N, ≤0.5% Mn, ≤0.3% Si, ≤0.1% P, 0.005-0.2% Al, either or both of Ti and Nb in the amounts satisfying the condition of C/12+N/14+S/321.2(Ti/48+Nb/93), and the balance Fe with inevitable impurities.;COPYRIGHT: (C)1997,JPO
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机译：解决的问题：生产具有优异的耐凹痕性，抗表面变形性和二次加工性的深冲钢板，并提供其制造方法。 ;解决方案：在该钢板中，表面和位置之间的平均成分在钢板厚度的10％处，按重量比计，≤0.005％的C，N的含量比含量高0.001-0.05％。薄板厚度中心部分的平均N含量，≤0.5％Mn，≤0.3％Si，≤0.1％P，0.005-0.2％Al，总计0.02-0.1％，另外，Fe为不可避免的杂质，此外，以维氏硬度计平均硬度为180〜300，另外，从表层到板厚的3％深度处的位置之间的部分的平均硬度为维氏硬度≤180。 。另外，从表面层到板厚的15％的深度的位置与板厚的中心之间的部分的平均组成为≤0.005％C，≤0.01％N，≤0.5％Mn，≤0.3％。 Si，≤0.1％P，0.005-0.2％Al，满足C / 12 + N / 14 + S / 32 <1.2（Ti / 48 + Nb / 93）的条件的Ti和Nb之一或两者;余量的铁中不可避免地带有杂质。;版权所有：（C）1997，日本特许厅
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