一、引言 汽轮机通流部分的失效,对用户来说无论在维修上的花费、还是由于系统发电能力降低而造成的收益损失,其代价都是昂贵的。 发生失效时,人们总是先从设计和运行参数上查找原因,其次再回顾装配过程,最后才查找工艺及标准,并按标准重新测零部件。在许多例子中,如果由设计、运行或装配造成失 I. INTRODUCTION The failure of the turbine flow-through part is costly for the user, regardless of the cost of maintenance or the loss of revenue due to the reduced power generation capacity of the system. In the event of a failure, people always look for reasons from the design and operating parameters, then review the assembly process, and finally find the technology and standards, and re-test parts according to the standards. In many cases, if caused by the design, operation or assembly loss