高炉布料溜槽轴断裂失效分析  

Fracture Analysis of Distribution Chute Shaft in Blast Furnace

作　　者：闻臻 刘冬 韩荣东 Wen Zhen;Liu Dong;Han Rongdong(R&D Center of Wuhan Iron&Steel Co.Ltd.,Wuhan 430080,Hubei)

机构地区：[1]宝钢股份中央研究院(武钢有限技术中心),湖北武汉430080

出　　处：《武汉工程职业技术学院学报》2025年第1期13-16,共4页Journal of Wuhan Engineering Institute

摘　　要：高炉布料溜槽在运行过程中,其偏心轴发生断裂,通过成分分析、力学性能检测、宏观及微观金相观察、扫描电镜分析等手段,分析了该溜槽偏心轴断裂失效的原因。结果表明:偏心轴断裂形式为旋转剪切断裂,断裂位于轴R角应力集中部位,运行时炉况异常导致反向气流冲击偏心轴发生剪切形变,炉顶高温环境导致偏心轴材料力学性能发生弱化,当材料抵抗力在某一临界温度下低于反向气流形成冲击力时,偏心轴发生剪切断裂。During the operation of the blast furnace material chute,its eccentric shaft broke.The reasons for the failure of the eccentric shaft of the chute were analyzed through methods such as composition analysis,mechanical property testing,macroscopic and microscopic metallographic observation,and scanning electron microscopy analysis.The results indicate that the fracture mode of the eccentric shaft is rotational fatigue fracture,and the fracture is located at the stress concentration site of the R-angle of the shaft.Abnormal furnace conditions during operation result in reverse airflow impacting the eccentric shaft and causing shear deformation.The high temperature environment on the furnace top leads to a weakening of the mechanical properties of the eccentric shaft material.When the resistance of the material is lower than the impact force formed by the reverse airflow at a certain critical temperature,the eccentric shaft undergoes shear fracture.

关 键 词：偏心轴 断裂 剪切形变 

分 类 号：TG115[金属学及工艺—物理冶金]