| 摘要 |
A material of outer layer of the roll for rolling containing the following elements at respective ratio: C: 1.5-3.5%; Si: 1.5 % or under; Mn: 1.2 % or under; Cr: 5.5-12.0 %; Mo: 2.0-8.0 %; V: 30-10.0 %; and Nb: 0.6-7.0 %, on condition that the following formulas (1): V + 1.8 Nb </= 7.5 C - 6.0 (%) and (2): 0.2 </= Nb/V </= 0.8 must be satisfied and, further, containing Fe and unremovable impurities as the remainder. <IMAGE> |
