TUBE BURST OF FINAL REHEATER ON BOILER OF A 1 000 MW ULTRA SUPERCRITICAL UNIT:CAUSE ANALYSIS

QIN Chengpeng1; WANG Liang1; LI Liang1; ZHONG Shipeng2; WANG Peng1; WANG Fugui1 1.Xi'an Thermal Power Research Institute Co.Ltd.

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TUBE BURST OF FINAL REHEATER ON BOILER OF A 1 000 MW ULTRA SUPERCRITICAL UNIT:CAUSE ANALYSIS

Thermal Power Generation Vol. 41, Issue 10, Pages: 69-72(2012)

更新时间：2025-09-28

- TUBE BURST OF FINAL REHEATER ON BOILER OF A 1 000 MW ULTRA SUPERCRITICAL UNIT:CAUSE ANALYSIS
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 广东惠州平海发电厂有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK228
- Published：2012
- 稿件说明：
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QIN Chengpeng1, WANG Liang1, LI Liang1, et al. TUBE BURST OF FINAL REHEATER ON BOILER OF A 1 000 MW ULTRA SUPERCRITICAL UNIT:CAUSE ANALYSIS[J]. Thermal Power Generation, 2012, 41(10): 69-72.
DOI：

QIN Chengpeng1, WANG Liang1, LI Liang1, et al. TUBE BURST OF FINAL REHEATER ON BOILER OF A 1 000 MW ULTRA SUPERCRITICAL UNIT:CAUSE ANALYSIS[J]. Thermal Power Generation, 2012, 41(10): 69-72. DOI：

摘要

对某台超超临界1 000MW机组的锅炉末级再热器HR3C爆管进行了宏观形貌观察、金相组织分析、室温拉伸性能试验、压扁试验、硬度试验、晶间腐蚀试验

并对爆口进行了扫描电镜及能谱分析。试验结果表明:末级再热器HR3C管因冷弯后未进行固溶处理

运行过程中的弯制残余应力、内压应力致使管材在有氯离子等腐蚀元素存在的环境中极易发生沿晶应力腐蚀开裂

从而导致爆管。

Abstract

Series of tests such as macroscopic morphology observation

metallographic analysis

tensile test at room temperature

flattening test

hardness test and intergranular corrosion test etc.were conducted for the burst HR3C tube.Besides

the scanning electron microscopy(SEM) with energy dispersive spectroscopy(EDS) was used to determine the corrosion product.Results show that

no solution treatment is done on the HR3C tube after its cold bending

so when it starts working

the intergranular stress corrosion cracking can easily occur in corrosive environment due to the bending residual stress and internal pressure stress.Therefore

tube burst happened.

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