60Si2Mn钢木材削片机刀片的强韧化热处理

Strengthening and toughening heat treatment of 60Si2Mn steel chipping blades for wood⁃chip machine

针对木材削片机刀片的服役条件,对60Si2Mn热轧钢刀片采用不同的预备热处理和强韧化热处理工艺,测试了其显微组织、抗弯强度、冲击性能及耐磨性,优化了60Si2Mn热轧钢刀片的热处理工艺。结果表明,60Si2Mn热轧钢经过双细化球化退火预先热处理,在900~930℃淬火和在300~310℃回火的马氏体级别为1级,能获得良好的强韧性配合。经900℃淬火+310℃回火后,60Si2Mn热轧钢刀片的抗弯强度达4350 MPa,挠度为12.4;冲击吸收能量为10.3 J;98 N载荷磨擦4 h的总磨损量为14 mg,可以满足轻载削片机刀片的技术要求。

In according with the service conditions of wood⁃chip cutting machine,the preparatory heat treatment and strengthening and toughening heat treatment processes were designed for the 60Si2Mn hot⁃rolled steel blades,and the metallographic structure,bending strength,impact property and wear resistance were tested,and the heat treatment process of the cutting machine blades made of 60Si2Mn hot⁃rolled steel was optimized.The results show that the 60Si2Mn hot⁃rolled steel blades can obtain good combination of strength and toughness after double⁃refinement spheroidizing annealing,and quenching at 900⁃930℃and tempering at 300⁃310℃,which the martensitic grade is grade 1.When quenched at 900℃and tempered at 310℃,the bending strength reaches 4350 MPa,the impact absorbed energy is 10.3 J,and the total wear mass loss under the load of 98 N for 4 h is 14 mg,which fully meets the technical requirements of the blades of the light duty wood⁃chip machine.