新型石墨钢材质设计及高温摩擦磨损性能研究  

Research on material design and high temperature friction and wear properties of new graphite steel

作　　者：瞿海霞[1] 侯晓光[1] 韩建增[1] QU Haixia;HOU Xiaoguang;HAN Jianzeng(Research Institute,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201999,China)

机构地区：[1]宝山钢铁股份有限公司中央研究院,上海201999

出　　处：《宝钢技术》2020年第5期1-8,共8页Baosteel Technology

摘　　要：为解决初轧产线产品材质与轧辊材质、装备能力严重不匹配的问题,设计石墨钢新材质,研究其微观组织、高温摩擦磨损等力学性能及替代半钢作为初轧V1机架轧辊材质的可行性。研究结果表明,石墨钢基体由硅和镍元素强化,球形石墨可起到自润滑、热传导和阻碍裂纹扩展的作用;适量和适当尺寸的碳化物强化基体,减少对基体的割裂作用,在高温磨损过程中亦不易断裂,减少磨粒磨损;相同高温摩擦磨损条件下,石墨钢与半钢相比,磨痕深度、磨损体积及氧化层厚度较小,同时磨痕表面犁沟、剥落、微裂纹较少、摩擦因数小且稳定性好。因此,新设计石墨钢耐磨性和抗热裂性均高于半钢材质,具有代替半钢作为初轧V1机架新材质的可行性。To solve the problem of the severe mismatch between the product and roll materials in the preliminary rolling line,a new graphitic steel material was designed,its microstructure and high-temperature friction and wear properties were investigated,as the feasibility of using this new material to replace semi-steel with in the V1 stand roll.The results show that the graphitic steel matrix is strengthened by silicon and nickel elements.The presence of spherical graphitic also provides self-lubrication and heat conduction and prevents the propagation of cracks.Carbides in the appropriate amount and size strengthen the matrix,reduce the cracking effect of the matrix,and are not easily broken,thereby reducing high-temperature abrasive wear.Under the same high-temperature friction and wear conditions,compared with semi-steel,the wear-scar surface of graphitic steel exhibits less wear-scar depth and wear volume,a smaller friction coefficient,reduced oxide layer thickness,and fewer instances of peeling and microcracks.Therefore,the newly designed graphitic steel has higher wear resistance and hot-crack resistance than semi-steel,which makes it feasible for use in replacing semi-steel as a new V1 frame roll material in the blooming mill.

关 键 词：石墨钢 微观组织 高温摩擦磨损性能 高温强度 抗热裂性 

分 类 号：TG142[一般工业技术—材料科学与工程]