锅炉再热器管屏密封焊缝开裂原因及质量控制要点

马鸣; 姜小哲; 王萍; 梁宝琦

doi:10.7512/j.issn.1001-2303.2022.10.15

重点关注 | 浏览量 : 0 下载量: 15 CSCD: 0

PDF
导出
分享
收藏
专辑

锅炉再热器管屏密封焊缝开裂原因及质量控制要点
Analysis of Cracking Causes and Quality Control Points of Sealing Fillet Welds of Boiler Reheater Tube Panels
2022年52卷第10期页码：101-106
DOI： 10.7512/j.issn.1001-2303.2022.10.15

扫描看全文

马鸣，姜小哲，王萍，等.锅炉再热器管屏密封焊缝开裂原因及质量控制要点［J］.电焊机，2022，52（10）：101-106.

MA Ming, JIANG Xiaozhe, WANG Ping, et al.Analysis of Cracking Causes and Quality Control Points of Sealing Fillet Welds of Boiler Reheater Tube Panels[J].Electric Welding Machine, 2022, 52(10): 101-106.
马鸣，姜小哲，王萍，等.锅炉再热器管屏密封焊缝开裂原因及质量控制要点［J］.电焊机，2022，52（10）：101-106. DOI： 10.7512/j.issn.1001-2303.2022.10.15.

MA Ming, JIANG Xiaozhe, WANG Ping, et al.Analysis of Cracking Causes and Quality Control Points of Sealing Fillet Welds of Boiler Reheater Tube Panels[J].Electric Welding Machine, 2022, 52(10): 101-106. DOI： 10.7512/j.issn.1001-2303.2022.10.15.

摘要

某超超临界电站锅炉机组的末级再热器部件安装后在吹扫试验环节发现不锈钢承压管件与不锈钢密封套管之间的个别角焊缝存在局部开裂情况。对残样管件进行包括化学成分、力学性能验证、金相检查、断口分析的一系列科学试验过程，确认裂纹是始于角焊缝焊趾处并由外壁向内壁扩展，最大裂缝位置处于焊趾成形不均匀处且为油漆之后产生，分析此开裂原因可能是角焊缝成形不均匀的焊趾部位偶然间瞬时承受了过大的外载荷而造成撕裂破坏，与现场外观检测结果吻合，并制定了相应的改进措施，有效保证了产品的质量、性能和安全，为后续制造同类产品提供借鉴参考。

Abstract

The local cracking of individual sealing fillet welds between stainless steel pressure tube and stainless steel sealing sleeves is analyzed and researched. The cracks are found in the blowing purge test after the installation of the RH finishing reheater in an ultra supercritical power plant boiler unit. A series of scientific experiments, including chemical analysis, mechanical properties, metallographic structure, SEM fracture analysis are carried out to confirm that the crack starts at the irregular toe of the fillet weld and extends from the outer wall to the inner wall after painting. Therefore, it is concluded that the reason for this kind of crack may be that the uneven forming part of the toe of the fillet weld occasionally and instantaneously bears excessive external load to damage, which is consistent with the results of on-site appearance inspection, and the corresponding improvement measures are formulated to effectively ensure the quality, performance and safety of products, and provide reference for the subsequent manufacture of similar products.

关键词

超超临界电站锅炉机组承压管件密封套管角焊缝裂纹

Keywords

ultra supercritical power plant boiler unitpressure tubesealing sleevefilletcrack

references

程东岳，金硕，孙旭东，等. 电站锅炉低温再热器蛇形管冷弯断裂成因分析［J］. 电焊机， 2020， 50（4）：100-102.

Cheng D Y，Jin S，Sun X D，et al. Analysis on the cause of cold bending fracture of low temperature reheater serpentine tube of power station boiler［J］. Electric Welding Machine， 2020， 50（4）：100-102.

张玮，莫春鸿. 奥氏体耐热钢SA-213TP310HCbN采用ERNiCr-3焊接接头性能试验及应用研究［J］. 电焊机，2019，49（08）：72-75，82.

Zhang W，Mo C H. Performance test and application of welded joint of welding austenitic heat-resistant steel SA-213TP310HCbN with ERNiCr-3［J］. Electric Welding Machine， 2019，49（08）：72-75，82.

夏军，李杰，闵玉龙，等. 核电站大口径不锈钢薄壁管在役焊接质量控制［J］. 电焊机，2019，49（04）：216-221.

Xia J，Li J，Min Y L，et al. Quafity control of large diameter thin-walled stainless steel pipeline welding in-service in nuclear power station［J］. Electric Welding Machine， 2019，49（04）：216-221.

李天. 沙角A电厂5号锅炉再热器管泄漏原因分析及处理［J］.中国电力，2005，38（5）：63-65.

Li T. Analysis aIld solution of reheater tube leakage in boiler No5 in Sha Jiao A Power Plant［J］. Electric Power.， 2005， 38（5）：63-65.

陈国宏. 锅炉再热器顶棚密封焊缝开裂原因分析及结构改进［J］. 热力发电， 2005， 37（11）： 126-128.

Chen G H. Cause analysis about fracture of sealing weld joints on ceiling of boilers reheater and structure retrofit thereof［J］. Thermal Power Generation， 2005，37（11）：126-128.

张学鹏，王萍. HR3C焊接接头700℃长期时效后的组织与性能分析［J］. 电焊机， 2010， 40（2）：117-120.

Zhang X P，Wang P. Analysis of microstructure and properties of HR3C welded joint aged at 700℃ for long time［J］. Electric Power.，2010，40（2）：117-120.

文章被引用时，请邮件提醒。

提交

9%Ni钢薄板焊条电弧焊弯曲试验开裂分析及改善

3 000 m³丙烯球形储罐焊缝裂纹原因分析与预防措施

30CrMnSi钢激光-电弧复合焊接工艺研究