CAUSE ANALYSIS OF CRACKS OCCURRED IN ANGLE-WELDING SEAM ON INLET HEADER OF LOW-TEMPERATURE SUPERHEATER

HU Xin-fang1; YUE Zeng-wu1; YU Guang-qiang2; WANG Jin-hai2; LIU Guo-gang2 1.Shandong Electric Power Reseach Institute

doi:10.19666/j.rlfd.2008.03.019

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CAUSE ANALYSIS OF CRACKS OCCURRED IN ANGLE-WELDING SEAM ON INLET HEADER OF LOW-TEMPERATURE SUPERHEATER

更新时间：2025-09-28

- CAUSE ANALYSIS OF CRACKS OCCURRED IN ANGLE-WELDING SEAM ON INLET HEADER OF LOW-TEMPERATURE SUPERHEATER
- Thermal Power Generation Issue 3, Pages: 72-75(2008)
- 作者机构：
  
  1. 山东电力研究院
  2. 华能德州发电厂
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2008.03.019
  CLC： TK223.32
- Published：2008
- 稿件说明：
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HU Xin-fang1, YUE Zeng-wu1, YU Guang-qiang2, et al. CAUSE ANALYSIS OF CRACKS OCCURRED IN ANGLE-WELDING SEAM ON INLET HEADER OF LOW-TEMPERATURE SUPERHEATER[J]. Thermal power generation, 2008, (3): 72-75.
DOI：

HU Xin-fang1, YUE Zeng-wu1, YU Guang-qiang2, et al. CAUSE ANALYSIS OF CRACKS OCCURRED IN ANGLE-WELDING SEAM ON INLET HEADER OF LOW-TEMPERATURE SUPERHEATER[J]. Thermal power generation, 2008, (3): 72-75. DOI： 10.19666/j.rlfd.2008.03.019.

摘要

华能德州发电厂5号炉低温过热器入口联箱管座角焊缝在管端熔合区处产生裂纹。通过应力分析、硬度检验、断口显微分析和焊缝及热影响区的金相分析

认为焊接工艺不当和管系结构设计不合理造成的应力集中是裂纹产生的主要原因。

Abstract

Cracks had occurred at the fusion zone of tubes’ end in the angle-welding seam on inlet header of the low-temperature superheater for boiler no.5 in Huaneng Dezhou Power Plant. Through stress analysis

hardness examination

microscopic analysis of the fracture

and metalographic analysis of the welded joint and heat-affected zone

it is believed that the main causes leading to cracks are stress concentration due to improper welding technology and irrational design of the tube structure.

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