公开(公告)号：US11712723B2

公开(公告)日：2023-08-01

申请号：US17762548

申请日：2020-10-16

申请人： PROTERIAL, LTD.

发明人： Yasunori Nozaki ,  Nozomu Oda ,  Toshiyuki Hattori

IPC分类号： B21B27/02 ,  C22C33/08 ,  C22C37/04 ,  C22C37/10 ,  B21B1/22 ,  B22D13/02

CPC分类号： B21B27/021 ,  C22C33/08 ,  C22C37/04 ,  C22C37/10 ,  B21B2001/225 ,  B22D13/02

摘要： A centrifugally cast composite roll for hot rolling comprising an outer layer made of an Fe-based alloy having a chemical composition comprising by mass 2.6-3.6% of C, 0.1-3% of Si, 0.3-2% of Mn, 2.3-5.5% of Ni, 0.5-3.2% of Cr, 0.3-1.6% of Mo, 1.8-3.4% of V, and 0.7-2.4% of Nb, 1.4≤V/Nb≤2.7, a V equivalent (Veq=V+0.55Nb) being 2.60-4% by mass, and the balance being Fe and impurities, and an inner layer made of an iron-based alloy and integrally fused to the outer layer.