摘要
通过对马头发电厂＃５机叶片断裂事故的设备检查，以及对第２７级隔板导流环连接螺栓的金相组织分析。认为造成叶片断裂事故的主要原因是连接螺栓在制造过程中存在过热现象，脆性增大，导致螺栓强度下降。针对这种情况采取了更换隔板、螺栓、加工底扣等改进措施。
Through equipment inspection and the metallographic examination on the guide ring jointing bolts of the 27th stage diaphragm after blade break accident,it leads to a conclusion that the jointing bolts were overheated during fabrication process.This increases the brittleness of the material and decreases the strength of the bolts.Based on this,the diaphragm and bolts are replaced,and the base clutches are fabricated.
出处
《河北电力技术》
1998年第2期47-49,共3页
Hebei Electric Power
