360°辊压圈圆成型压路机振轮耐磨钢关键技术研发及应用

RESEARCH AND APPLICATION OF KEY TECHNOLOGIES OF WEAR RESISTANT STEEL FOR VIBRATING WHEEL OF 360°ROLLER RING ROUND FORMING ROLLER

通过静态相变转变规律研究,采取控温淬火热处理工艺,控制细小板条马氏体与残余奥氏体百分比含量,获得了具有高强度、高硬度、高耐磨性、良好低温韧性以及一定延伸性能的耐磨钢,提升了成型延伸性能。结果表明,轧制工艺采用渗透控制轧制,促使钢板形变由表面向心部均匀、同步渗透,使其厚度方向形变一致,可得到细小、均匀的原始形变组织;开发的压路机振轮耐磨钢NM360-YLJ厚度为16~40 mm,辊压圈圆直径为0.8~2.4 m,圆度偏差为0.8~2.0 mm;微观组织中细小板条马氏体含量≥95%,残余奥氏体含量≥2.0%,抗拉强度≥1100 MPa,耐磨性为Q355级别产品的2.4倍以上。

Through the study of static transformation law,temperature controlled quenching heat treatment process is adopted to control the percentage content of fine lath martensite and retained austenite.Wear resistant steel with high strength,high hardness,high wear resistance,good low-temperature toughness and certain elongation is obtained,and the forming elongation is improved.The results show that the infiltration controlled rolling process can promote the uniform and synchronous infiltration of steel plate deformation from the surface to the center,make the deformation in the thickness direction consistent,and obtain fine and uniform original deformation structure.The developed roller vibration wheel wear-resistant steel NM360-YLJ has a thickness of 16~40 mm,a roller ring diameter of 0.8~2.4 m and a roundness deviation of 0.8~2.0 mm.As for the microstructure,the fine lath martensite content is≥95%,and the retained austenite content is≥2.0%.Its tensile strength is≥1100 MPa,and the wear resistance is more than 2.4 times that of Q355 grade products.