华电技术 ›› 2018, Vol. 40 ›› Issue (4): 36-39.

• 技术交流 • 上一篇    下一篇

超超临界机组低温再热器失效分析

  

  1. 广东大唐国际肇庆热电有限责任公司,广东肇庆〓526105
  • 出版日期:2018-04-25 发布日期:2018-06-21

Analysis of invalid lowtemperature reheater of supercritical unit

  1. Guangdong Datang International Zhaoqing Thermoelectric Company Limited, Zhaoqing 526105, China
  • Online:2018-04-25 Published:2018-06-21

摘要:

针对某电厂1000MW机组低温再热器失效管样,进行常温性能、金相组织、无损检测结果等方面的试验与分析,得出焊接质量不良、原始性能不足是爆管失效的主要原因,并针对材料失效的原因提出了相应的建议。

关键词:

Abstract:

Aiming at an invalid tube sample of a lowtemperature reheater of a 1000MW unit, room temperature performance, metallography and nondestructive testing results were analyzed. It is concluded that the welding quality, lack of original performance are major causes of tube failure, and corresponding suggestions for the cause of material failure were put forward.