摘要
火力发电厂汽轮机高温螺栓是汽轮机组的重要部件,在长期运行过程中,高温螺栓要承受蠕变、疲劳及其交互作用的影响,机组的启停、振动以及螺栓的制造质量等均对螺栓的使用寿命产生重要影响。在初步了解不同运行时间段的12%Cr钢高温螺栓材料性能状况的基础上,采用加速蠕变断裂试验法对运行35×104h的高温螺栓安全使用状况进行了综合评估,在评价高温部件安全可靠性方面进行了新的尝试。
High-temprature bolt is main part of turbine in steam-power plant. It bears creep, fatigue and their interactivities in extended-service. Start-stop, vibration ,manufacturing quality and other factors of the bolt will pay important influences on the unit service life. Based on research of 12% Cr-steel high-temprature bolt in different service conditions, accelerated creep rupture test is used to evaluate safe reliability of bolts which has serviced for 350 000 hours. This is a new attempt in the field of safe reliability evaluation about high-temprature parts in steam-power plant.
出处
《汽轮机技术》
北大核心
2009年第4期318-320,共3页
Turbine Technology
