高碳硅锰钢的动态力学性能  

Dynamic mechanical properties of high carbon silicon manganese steel

作　　者：袁伍丰 吴润[1] 尉文超 轩阳 闫永明[2] Yuan Wufeng;Wu Run;Yu Wenchao;Xuan Yang;Yan Yongming(College of Materials and Metallurgy,Wuhan University of Science and Technology,Wuhan Hubei 430081,China;Institute for Special Steels,Central Iron and Steel Research Institute,Beijing 100081,China)

机构地区：[1]武汉科技大学材料与冶金学院,湖北武汉430081 [2]钢铁研究总院特殊钢研究所,北京100081

出　　处：《金属热处理》2020年第9期155-160,共6页Heat Treatment of Metals

摘　　要：通过扫描电镜、霍普金森压杆和拉伸试验机等仪器研究了不同温度淬火高碳硅锰钢的组织、变形程度和动态力学性能。研究表明,随淬火温度提高,试验钢中残留碳化物数量减少,在880℃时,试验钢的残留碳化物全部溶解。动态力学试验后,880℃淬火试样因残留碳化物固溶,动态强度增幅较小,对应变速率不敏感,由均匀变形转为破碎。绝热剪切带内和远离绝热剪切带的区域均存在孔洞,远离剪切带区域的孔洞无序分布,且伴随有均匀分布的碳化物。靠近绝热剪切带区域的碳化物存在分布不均匀的情况,且绝热剪切带内部的孔洞沿着热量传播方向扩展,形成沿剪切带分布的裂纹。Microstructure,deformation degree and dynamic mechanical properties of high carbon steel quenched at different temperatures were studied by means of scanning electron microscopy,Hopkinson pressure bar and tensile testing machine.The results show that as the quenching temperature increases,the amount of residual carbides in the experimental steel decreases.At 880℃,the residual carbides in the experimental steel are all dissolved.After the dynamic mechanical test,due to the dissolution of the residual carbide,the increase in dynamic strength of the specimen quenched at 880℃is small.And because it is insensitive to the strain rate,the uniform deformation becomes broken.There are holes in the area of the adiabatic shear band and away from the adiabatic shear band.Far from the area of the shear band,the holes are disorderly distributed and accompanied by carbides.The carbides near the adiabatic shear zone are unevenly distributed.And the holes inside the adiabatic shear bands expand along the heat propagation direction,forming cracks distributed along the shear band.

关 键 词：高碳硅锰钢 动态性能 绝热剪切带 淬火温度 碳化物 

分 类 号：TG142.1[一般工业技术—材料科学与工程]