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1 绪言 热电厂发电设备或机器,以及高温环境中运行的其它类似设备容易受到频繁停机、起动和工作状况频繁变化的影响,而产生疲劳和蠕变,造成损坏,所以在设计和维护此类设备时准确地判断设备内部产生的损坏显得特别重要。 特别是对于核反应堆压力容器,已经以ASME B&PV Code SectionⅢCase N47的形式为2 1/7Cr—1Mo之类的高温钢的使用建立了一套合理的设计标准和规范。然而事实上,疲劳和蠕变在这些环境中的相互影响尚有很多未弄清楚,故此研究人员从断裂现象观点和断裂机理观点两个方面进行研究。
1 INTRODUCTION Thermal power plant power generation equipment or machinery, as well as other similar equipment operating in high-temperature environments, are subject to frequent downtime, start-up and frequent changes in operating conditions that can cause fatigue and creep and cause damage so when designing and maintaining such equipment Accurately determine the damage generated within the device is particularly important. In particular, for nuclear reactor pressure vessels, a set of reasonable design standards and specifications have been established for the use of high temperature steels such as 2 1/7 Cr-1Mo in the form of ASME B & PV Code Section III Case N47. However, in fact, the interaction between fatigue and creep in these environments is still unclear. Therefore, the researchers studied the phenomena of fracture phenomena and fracture mechanism.