| 摘要 |
PROBLEM TO BE SOLVED: To provide a wear resistant steel sheet in which excellent low temperature toughness can be obtained without involving the difficulty in a process, and to provide a production method therefor. SOLUTION: The wear resistant steel sheet has a composition comprising 0.10 to 0.35% C, 0.05 to 1.0% Si, 0.1 to 2.0% Mn,≤0.020% P,≤0.005% S and 0.005 to 0.03% Nb, and further comprising one or more kinds of metals selected from 0.03 to 2.0% Cu, 0.03 to 2.0% Ni, 0.03 to 2.0% Cr, 0.03 to 1.0% Mo and 0.005 to 0.1% V, wherein expression (1) of 100×(Cu+Ni+4Cr+6Mo+4V)/t satisfies≥4.5, and the balance substantially Fe, and comprises≥90% martensite with a grain size of≤25μm as quenched. COPYRIGHT: (C)2005,JPO&NCIPI
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