摘要
针对某超超临界1 000 MW汽轮机再热阀组阀盖螺栓"家族性"断裂问题,分析了GH783螺栓材料特性及断裂特征,提出了对GH783螺栓现场检修工艺的优化改进措施,可有效防止螺栓裂纹源的产生,避免过早出现脆性断裂,延长GH783螺栓的使用寿命。
Aiming at the familial fracture of bonnet bolts of some ultra-supercritical 1000 MW steam turbine reheat valve set,the material characteristics and fracture characteristics of the GH783 bolt are analyzed and the optimization of GH783 bolts on-site maintenance process is proposed.This new method can prevent the generation of bolt crack source effectively and avoid premature brittle fracture,which extending the service life of GH783 bolts.
作者
刘永民
LIU Yongmin(Guangdong Huizhou Pinghai Electrical Power Co.,Ltd.,Huizhou 516363,Guangdong Province,China)
出处
《电力安全技术》
2019年第3期54-57,共4页
Electric Safety Technology
关键词
超超临界
再热阀组
GH783螺栓
优化
ultra-supercritical
reheat valve set
GH783 bolt
optimization
