Φ140mm自动轧管机轧辊断裂原因分析  

Analysis of Causes for Fracture of Roll of Φ140 mm Plug Pipe Mill

作　　者：李民 

机构地区：[1]江西洪都钢厂有限公司,江西南昌330013

出　　处：《钢管》2013年第6期66-68,共3页Steel Pipe

摘　　要：从实物断面、金相组织方面分析了Φ140 mm自动轧管机轧辊断裂的原因。结果表明:由于轧辊的化学成分中S元素严重超标和基体组织不正常(球化率低,渗碳体数量过高等),是导致轧辊机械性能显著下降,造成轧辊断裂的主要原因。Analyzed are the causes for fracture of roll of the Φ140 mm plug pipe mill by means of examination of the fracture proper, and the metallographic structure of the roll. As a result, it is revealed that serioursly excessive S content and abnormal base structure （i.e., low spheroidization rate and rather high cementite amount, etc.） of the roll material jointly lead to remarkably going down of the roll＇s mechanical properties, which is mainly responsible for fracture of the roll.

关 键 词：Φ140 mm自动轧管机 轧辊 断裂 球墨铸铁 球化率 渗碳体 

分 类 号：TG333.17[金属学及工艺—金属压力加工] TG115