ROLLER FOR WELDING PIPE MILL

摘要

A high Cr casting iron or steel roller is applicable to a mill for rolling welded pipe. The composition of the high Cr casting iron roller contains (by wt%): 1.8-2.8% C, =1.0% Si, =1.0% Mn, =0.05% P, =0.05% S, 12-22% Cr, 0.5-3.0% Ni, 0.8-3.0% Mo, 0-0.3% Ti, 0-1.0% V, 0-1.0% Cu, 0.01-0.5% RE, and balance Fe. The composition of the high Cr casting iron roller contains (by wt%): 0.7-1.2% C, =1.0% Si, =1.0% Mn, =0.05% P, =0.05% S, 8-12% Cr, 0.5-2.0% Ni, 0.8-3.0% Mo, 0-0.3% Ti, 0-1.0% V, 0-0.8% W, 0.01-0.5% RE, and balance Fe. With the roller for welding pipe mill, as being producing by casting, the material organization of the roller is consistent throughout the roller, toughness and wear resistance are very high, thereby having a service life of 2-5 times more than a forged roller.