Article(id=1221425784233836715, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1221425781750808678, articleNumber=null, orderNo=null, doi=10.19666/j.rlfd.202205101, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1652284800000, receivedDateStr=2022-05-12, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1769140199955, onlineDateStr=2026-01-23, pubDate=1674576000000, pubDateStr=2023-01-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769140199955, onlineIssueDateStr=2026-01-23, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769140199955, creator=13701087609, updateTime=1769140199955, updator=13701087609, issue=Issue{id=1221425781750808678, tenantId=1146029695717560320, journalId=1210938733613449225, year='2023', volume='52', issue='1', pageStart='1', pageEnd='182', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769140199363, creator=13701087609, updateTime=1769145231708, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1221446888994292213, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1221425781750808678, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1221446888994292214, tenantId=1146029695717560320, journalId=1210938733613449225, issueId=1221425781750808678, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=170, endPage=176, ext={EN=ArticleExt(id=1221425784498077884, articleId=1221425784233836715, tenantId=1146029695717560320, journalId=1210938733613449225, language=EN, title=Analysis on weld defects and tensile properties of dissimilar steel with backing plate, columnId=1211002409397129992, journalTitle=Thermal Power Generation, columnName=Power generation technology forum, runingTitle=null, highlight=null, articleAbstract=

Welding of dissimilar steels is a widely used connection method for super-heater tubes of boilers in power plants. Taking the TP304H/T22 dissimilar steel welded joint with backing plate at the superheater outlet of a thermal power unit as the research object, the formation mechanism and influence of cracks in the welded joint are analyzed through macro measurement, microstructure analysis, EDS energy spectrum detection and tensile test. The results show that, the differences in thermal expansion coefficients of the three substrates and stress concentration are the cause of the cracks of the dissimilar steel weld with backing plate and crack propagation in nickel base weld filler. The weld is the weak link in room temperature tension, while the fusion line and base metal are the fracture parts in high temperature tension.

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异种钢焊接是电厂锅炉受热面管广泛采用的一种连接方式。以某火电机组过热器出口段TP304H和T22为母材的带垫板异种钢焊接接头为研究对象,通过宏观测量、微观组织分析、EDS能谱检测和拉伸试验等研究,分析了焊接接头中裂纹的生成机理及影响。结果表明:3种材料热膨胀系数差异及应力集中是带垫板异种钢焊缝裂纹产生的诱因,裂纹在镍基焊缝填充材料中扩展;室温拉伸时焊缝是薄弱环节,而高温拉伸时熔合线和母材是断裂部位。

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汪峰(1970),男,助理工程师,主要研究方向为火电锅炉检修和金属监督,

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汪峰(1970),男,助理工程师,主要研究方向为火电锅炉检修和金属监督,

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汪峰(1970),男,助理工程师,主要研究方向为火电锅炉检修和金属监督,

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带垫板异种钢焊缝缺陷与拉伸性能分析
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汪峰 1 , 李梁 2 , 徐刚 2 , 张赵斐 2 , 李飞 2 , 徐敏 2
热力发电 | 发电技术论坛 2023,52(1): 170-176
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热力发电 | 发电技术论坛 2023, 52(1): 170-176
带垫板异种钢焊缝缺陷与拉伸性能分析
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汪峰1 , 李梁2, 徐刚2, 张赵斐2, 李飞2, 徐敏2
作者信息
  • 1.华能国际电力股份有限公司南通电厂,江苏 南通 226003
  • 2.西安热工研究院有限公司,陕西 西安 710054
  • 汪峰(1970),男,助理工程师,主要研究方向为火电锅炉检修和金属监督,

Analysis on weld defects and tensile properties of dissimilar steel with backing plate
Feng WANG1 , Liang LI2, Gang XU2, Zhaofei ZHANG2, Fei LI2, Min XU2
Affiliations
  • 1.Nantong Power Plant of Huaneng International Power Co., Ltd., Nantong 226003, China
  • 2.Xi'an Thermal Power Generation Co., Ltd., Xi'an 710054, China
出版时间: 2023-01-25 doi: 10.19666/j.rlfd.202205101
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异种钢焊接是电厂锅炉受热面管广泛采用的一种连接方式。以某火电机组过热器出口段TP304H和T22为母材的带垫板异种钢焊接接头为研究对象,通过宏观测量、微观组织分析、EDS能谱检测和拉伸试验等研究,分析了焊接接头中裂纹的生成机理及影响。结果表明:3种材料热膨胀系数差异及应力集中是带垫板异种钢焊缝裂纹产生的诱因,裂纹在镍基焊缝填充材料中扩展;室温拉伸时焊缝是薄弱环节,而高温拉伸时熔合线和母材是断裂部位。

锅炉管  /  异种钢焊缝  /  裂纹  /  垫板

Welding of dissimilar steels is a widely used connection method for super-heater tubes of boilers in power plants. Taking the TP304H/T22 dissimilar steel welded joint with backing plate at the superheater outlet of a thermal power unit as the research object, the formation mechanism and influence of cracks in the welded joint are analyzed through macro measurement, microstructure analysis, EDS energy spectrum detection and tensile test. The results show that, the differences in thermal expansion coefficients of the three substrates and stress concentration are the cause of the cracks of the dissimilar steel weld with backing plate and crack propagation in nickel base weld filler. The weld is the weak link in room temperature tension, while the fusion line and base metal are the fracture parts in high temperature tension.

boiler tube  /  dissimilar steel weld  /  crack  /  backing plate
汪峰, 李梁, 徐刚, 张赵斐, 李飞, 徐敏. 带垫板异种钢焊缝缺陷与拉伸性能分析. 热力发电, 2023 , 52 (1) : 170 -176 . DOI: 10.19666/j.rlfd.202205101
Feng WANG, Liang LI, Gang XU, Zhaofei ZHANG, Fei LI, Min XU. Analysis on weld defects and tensile properties of dissimilar steel with backing plate[J]. Thermal Power Generation, 2023 , 52 (1) : 170 -176 . DOI: 10.19666/j.rlfd.202205101
  • 中国华能集团有限公司总部科技项目(HNKJ20-G01)
2023年第52卷第1期
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doi: 10.19666/j.rlfd.202205101
  • 接收时间:2022-05-12
  • 首发时间:2026-01-23
  • 出版时间:2023-01-25
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  • 收稿日期:2022-05-12
基金
Science and Technology Project of China Huaneng Group Co., Ltd.(HNKJ20-G01)
中国华能集团有限公司总部科技项目(HNKJ20-G01)
作者信息
    1.华能国际电力股份有限公司南通电厂,江苏 南通 226003
    2.西安热工研究院有限公司,陕西 西安 710054
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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