黄磊，高级工程师,2004年毕业于东北大学材料物理专业。
E-mail :***************轧辊扁头断裂失效分析 黄磊，王晓峰，胡筱旋
(鞍钢集团钢铁研究院，辽宁鞍山114009)
摘要：借助于光学显微镜、扫描电镜检验设备，结合力学性能测定、化学成分分析等方法，对材质为25Cr2Ni4MoV 的轧辊扁头进行了相关检验分析，出轧辊扁头断裂失效原因。结果表明，扁头失效形式为起源于表面缺陷的高应力低周多源疲劳断裂，堆焊表面存在气孔缺陷是扁头产生台阶状的疲劳断裂的主要原因，扁头金相组织不均匀和基体强度不足是扁头发生疲劳断裂的重要影响因素。 信号灯作5G
关键词：轧辊扁头；疲劳断裂；堆焊；金相组织；基体强度
中图分类号:TG333.17文献标识码:A 文章编号:1006-4613(2020)03-0040-04
祛痘除皱美白面膜素Analysis on Failure Caused by Breaking of Flat Head of Roll
pdb培养基Huang Lei ,Wang Xiaofeng ,Hu Xiaoxuan
(Ansteel Iron &Steel Research Institutes ,Anshan 114009,Liaoning ,China )Abstract :With the help of such inspection equipment as optical microscope and scanning electron microscope,combined with the method such as mechanical property measurement and chemical composition analysis ,the relevant inspection and analysis over the flat head of a roll made of 25Cr2Ni4MoV was carried out to find out the cause leading to the failure of the flat head.The analytical results demonstrated that the failure of the flat head was originated from the start of a high-stress low-cycle multi-source fatigue fracture caused by surface defects.And the porosity defect occurred on the build -up welding surface was the main cause leading to the step -like fatigue fracture on the flat head while inhomogeneous metallographic structure and insufficient strength of the matrix in terms of the flat head were an important influencing factor leading to the fatigue fracture of the flat head.Key words :flat head of roll ;fatigue fracture ;build -up welding ;microstructure ;matrix strength
轧钢机械设备的正常运转是保证企业生产
顺行、提高市场竞争力的重要条件，轧辊扁头是
联接轧辊与传动轴的部件，工作中承受较大的
q1se扭矩及冲击力，一旦发生断裂事故，会严重影响
辣椒红素的提取生产，给企业造成经济损失。某厚板厂材质为25Cr2Ni4MoV 的轧辊扁头在线运行约4个月后，经着探伤发现裂纹缺陷。为了提高表面高温耐
电暖水袋
磨性，在工件表面进行堆焊[1]，然后打磨修复，上机继续运行约两个月后发生断裂失效，严重影响
了生产厂的工作进度，造成较大经济损失。为避免此类事件再次发生，拟采用光学显微镜、扫描电镜等检测仪器，结合力学试验和化学分析方法，对断裂扁头试样进行相关检验分析，以出轧辊扁头断裂失效的原因。1检验分析为了出扁头断裂原因，对试样进行了系统检验，包括低倍检验、高倍检验、力学性能测试以及化学分析等。1.1低倍观察分析首先对受检试样进行了断口的宏观观察,
宏鞍钢技术2020年第3期ANGANG TECHNOLOGY 总第423期
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