690合金传热管胀管区质量检测

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Expansion between tube and tubesheet is a key process during the manufacture of heat ex- changers , and the expansion quality affects the use of heat exchangers. The basic principles of expanding technology and the key points of quality control for expansion during the nuclear island heat exchanger manufacturing were introduced, and three methods （ eddy current profile curve method, inner diameter var- iation measurement, dissection measurement） to evaluate the quality of expansion were studied.胀接是换热器制造中的一道关键工序，胀接区质量影响着换热器的使用。介绍了胀接工艺的基本原理，并分析了核电站换热器胀接过程中的质量控制要点：胀管率和未胀合长度，研究了胀管区质量进行评估的三种方法：涡流轮廓曲线法、内径变化测量法和解剖测量法。