CAUSE ANALYSIS OF WELD SEAM CRACKING ON THERMOCOUPLE SLEEVES USED FOR MAIN STEAM PIPELINE

XU Jiang-xiao; SONG Li; CHANG Jian-bingHenan Electric Power Testing & Research Institute

doi:10.19666/j.rlfd.2009.02.021

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CAUSE ANALYSIS OF WELD SEAM CRACKING ON THERMOCOUPLE SLEEVES USED FOR MAIN STEAM PIPELINE

更新时间：2025-09-28

- CAUSE ANALYSIS OF WELD SEAM CRACKING ON THERMOCOUPLE SLEEVES USED FOR MAIN STEAM PIPELINE
- Thermal Power Generation Vol. 38, Issue 2, Pages: 78-79(2009)
- 作者机构：
  
  河南电力试验研究院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2009.02.021
  CLC： TM621.72
- Published：2009
- 稿件说明：
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XU Jiang-xiao, SONG Li, CHANG Jian-bingHenan Electric Power Testing & Research Institute. CAUSE ANALYSIS OF WELD SEAM CRACKING ON THERMOCOUPLE SLEEVES USED FOR MAIN STEAM PIPELINE[J]. Thermal power generation, 2009, 38(2): 78-79.
DOI：

XU Jiang-xiao, SONG Li, CHANG Jian-bingHenan Electric Power Testing & Research Institute. CAUSE ANALYSIS OF WELD SEAM CRACKING ON THERMOCOUPLE SLEEVES USED FOR MAIN STEAM PIPELINE[J]. Thermal power generation, 2009, 38(2): 78-79. DOI： 10.19666/j.rlfd.2009.02.021.

摘要

分析了河南省某发电有限责任公司1号机组主蒸汽管道热电偶套管焊缝开裂的原因

认为未对母材进行预热和热处理、焊接存在缺陷及应力等是造成开裂的原因。对此

制定了M+A异种钢的焊接工艺

如选择lnconel型焊条

焊前须对母材预热到250~300℃

焊接过程中尽量采用小规模焊接

焊后对焊材保温缓冷

选择合适的热处理温度等。

Abstract

The casues leading to weld seam cracking on thermocouple sleeves used for main steam pipeline of unit no.1 in one power plant of Henan Province have been analysed

it is believed that the causes of cracking are as follows:the base metal hasn't warmed up

and the heat treatment hasn't been carried out

as well as defects and stress existing in welding

etc..For this

the welding process of M+A different steels has been worked out

such as:selecting Inconel type welding electrode;the base metal must be warmed up to 250 ℃~300 ℃;in the process of welding

adopting small criterion weld as possible;after welding

the welded metal should be applied with thermal insulation for being slowly cooled;and choosnig suitable temperature for heat treatment etc..

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