【摘要】 型钢和线材轧机的粗轧和中间机架的轧辊采用含C 1.3～1.5％;Si 0.2～0.6％;Mn 0.7～1.0％;Ni 0.8～1.2％;Cr 0.8～1.2％;Mo 0.4～0.6％和P、S≤0.035％的半钢制造。成分中加入稀土元素细化了碳化物,改善了韧性。轧辊在金属型中铸造,并经1050～1100℃扩散退火,800～820℃球化退火,900℃以上正火和600～650℃回火。热处理后轧辊强度大于65kgf/mm~2,硬度HS41～45。这种半钢轧辊的使用寿命比70Mn2铸钢轧辊提高1～9倍。每年在每一机架上可节约轧辊费用3×10~4(?)。更多还原

【Abstract】 Roughing and intermediate rolls for structure and wire mills were made of adamite steel contain-ing 1.3～1.5％C;0.2～0.6％Si;0.7～1.0％Mn;0.8～1.2％Ni;0.8～1.2％Cr;0.4～0.6％Mo and up to 0.035％Pand S.The rare earth addition fined the carbide and improved the toughness. The rolls were cast in chilled mould.The cast rolls were annealed at 1050～1100℃,spheroidizedat 800～820℃,normalized above 900℃ and tempered at 600～650℃. The heat-treated rolls had a tensile strength more than 65kg/mm~2 and hardness Hs41～45. The service life of such adamite rolls was 2～10 times the life of cast rolls of 70Mn2 steel and30000 yuan/year cost of rolls can be saved.更多还原