某发电公司中速磨煤机旋转喷嘴断裂原因分析  

Fracture Analysis of Rotating Nozzle of Coal Mill at Power Plant

作　　者：张艳红[1] 

机构地区：[1]辽宁省电力有限公司电力科学研究院,辽宁沈阳110006

出　　处：《东北电力技术》2013年第1期9-12,共4页Northeast Electric Power Technology

摘　　要：通过对发生断裂的某公司磨煤机旋转喷嘴进行断口宏观特性、化学成分、机械性能等试验分析,得出旋转喷嘴断裂的主要原因是铸件ZG50Mn2材质不合格,材质强度较低、韧性较差,且存在原始铸造缺陷,其抵抗裂纹形成及扩展能力较差,同时提出了相应的改进措施。The reasons of fracture of the rotating nozzle of coal mill are discussed. By analyzing the fracture surface, chemical compo- sition and mechanical properties, it indicates the fracture of the rotating nozzle mainly due to the poor quality of casting ZGSOMn2, which has low material strength, poor toughness, original casting defects and low resistance to crack and expansion. It also puts for- ward several measures for improvement.

关 键 词：磨煤机 喷嘴 ZG50Mn2 机械性能 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程] TK229.6