烧结增压风机叶片断裂原因分析  

Analysis on the Fracture Causes of Sintering Booster Fan Blade

作　　者：翁万卿 Weng Wanqing(Ningbo Iron&Steel Co.,Ltd.,Ningbo 315807)

机构地区：[1]宁波钢铁有限公司,浙江宁波315807

出　　处：《冶金设备》2023年第5期89-91,80,共4页Metallurgical Equipment

摘　　要：宁波钢铁有限公司炼铁厂烧结3个系列增压风机,自投产后先后多次发生叶片异常断裂现象,严重影响了生产的正常进行。本文技术人员利用专业的分析和理化检验手段,找出了增压风机叶片断裂产生的原因,研究结果表明,主要原因为叶片的原始铸造缺陷引起,该叶片材料表面和内部均有铸造孔洞缺陷,外表面的孔洞在腐蚀环境中形成点蚀,并向内扩散,形成裂纹源,裂纹源在交变应力作用下扩展,直至最终断裂。经过对叶片成型方式和材质改型,上机使用后再未出现断裂现象,具有广泛借鉴意义。Ningbo Iron Steel Co.,Ltd.,sinred 3 series of booster fans,and the abnormal blade fracture has occurred many times since the production,which seriously affected the normal production.The technical personnel using the professional analysis and physical and chemical inspection means,find out the cause of booster fan blade fracture,the study results show that the main reason is the original casting defects,the blade material surface and internal casting holes defects,the outer surface of the holes in corrosion environment,and inward diffusion,form the crack source,the source of crack under the action of alternating stress extension,until the final fracture.After the blade forming mode and material modification,there is no fracture phenomenon after the machine,which has wide reference significance.

关 键 词：烧结 增压风机 叶片断裂 

分 类 号：TF083[冶金工程—冶金物理化学] TM307[电气工程—电机] TK223.27[动力工程及工程热物理—动力机械及工程]