天生桥二级电站1号水轮机联轴螺栓断裂原因简析  

Fracture Reason Analysis of Turbine Coupling Bolt in Tiansheng Bridge Secondary Power Station

作　　者：杨峰[1] 温浩宇[2] 王洪飞[2] 唐正华[2] 

机构地区：[1]中国南方电网调峰调频发电公司天生桥水力发电总厂,贵州兴义562400 [2]四川大学材料与工程学院,四川成都610065

出　　处：《热加工工艺》2013年第8期224-226,共3页Hot Working Technology

摘　　要：通过对天生桥二级电站1号水轮机断裂联轴螺栓进行金相分析和断口的电镜扫描分析,指出水轮机联轴螺栓裂纹源和断面均未观察到明显的疲劳纹,断裂的方式主要为脆性断裂,与螺栓用钢种的高温回火脆性有关。Through SEM and metallographic analysis of a turbine fracture bolt in tiansheng bridge secondary water power station, the crack source and the significant fatigue lines on the turbine bolt fracture surface were not observed, it was brittle fracture due to high temperature tempering brittleness of the type of steel for bolt.

关 键 词：联轴螺栓 脆性断裂 高温回火脆性 

分 类 号：TG111.91[金属学及工艺—物理冶金]