| 摘要 |
PURPOSE:To obtain a roll for hot rolling having high wear resistance and toughness by forming an overlay layer having a specific compsn. by plasma welded overlayer on the outside circumference of the core part of the roll consisting of steel materials having toughness. CONSTITUTION:The overlay layer 1 having the following compsn. is formed by plasma powder welding on the outer circumference in the core part 2 of the steel materials having the toughness. The compsn. of the overlay layer 1 consists, by weight per cent, 1.5-2.5% C, 0.1-1.5% Si, 0.1-1.0% Mn, 0.1-1.5% Ni, 1.0-5.0% Cr, 1.0-5.0% Mo, 5.0-15.0% Co, 5.0-15.0% W, 6.0-15.0% V, and the balance substantially Fe. The roll for hot rolling which has the toughness, has the wear resistance and thermal impact resistance in the working layer and is thermally stable is thereby obtd. |
