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苏联在高蒸汽参数的现代动力机组制造中,广泛采用20×1М1ФБР(ЭП44)钢制作法兰紧固件。许多单元机组上使用20×1М1ФБР钢制作的双头螺栓现已使用8～9万小时,因此有必要针对这类钢材制作的紧固件研究出一种预测使用寿命的方法。当前,要求动力机械制造厂把电站设备的使用寿命提高到20万小时是有可能实现的,因为可通过对不同运行时间的部件材质变化情况进行全面研究,并求
The Soviet Union widely used 20 × 1М1ФБР (ЭП44) steel for making flange fasteners in the manufacture of modern power units with high steam parameters. Many unit units using 20 × 1М1ФБР steel studs have been used 80,000 to 90,000 hours, it is necessary for the production of such fasteners to develop a method to predict the service life. At present, it is possible to require the power machinery manufacturer to increase the service life of power plant equipment to 200,000 hours, because it is possible to conduct a comprehensive study on the changes of material components in different operating hours and to find