Article(id=1220689392897802930, tenantId=1146029695717560320, journalId=1220038251117760515, issueId=1220689383687115496, articleNumber=null, orderNo=null, doi=10.11868/j.issn.1001-4381.2023.000169, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1678723200000, receivedDateStr=2023-03-14, revisedDate=null, revisedDateStr=null, acceptedDate=1684944000000, acceptedDateStr=2023-05-25, onlineDate=1768964630579, onlineDateStr=2026-01-21, pubDate=1763568000000, pubDateStr=2025-11-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1768964630579, onlineIssueDateStr=2026-01-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1768964630579, creator=13701087609, updateTime=1768964630579, updator=13701087609, issue=Issue{id=1220689383687115496, tenantId=1146029695717560320, journalId=1220038251117760515, year='2025', volume='53', issue='11', pageStart='1', pageEnd='238', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1768964628383, creator=13701087609, updateTime=1768964982596, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1220690869431222607, tenantId=1146029695717560320, journalId=1220038251117760515, issueId=1220689383687115496, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1220690869431222608, tenantId=1146029695717560320, journalId=1220038251117760515, issueId=1220689383687115496, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=80, endPage=89, ext={EN=ArticleExt(id=1220689393216570053, articleId=1220689392897802930, tenantId=1146029695717560320, journalId=1220038251117760515, language=EN, title=Microstructure and mechanical properties of 9Ni steel joints welded by NiCrMo filler alloy, columnId=1220689384450478826, journalTitle=Journal of Materials Engineering, columnName=RESEARCH ARTICLE, runingTitle=null, highlight=null, articleAbstract=
Welding of cryogenic 9Ni steel is performed using NiCrMo alloy systems with different Nb and C contents. The microstructure and mechanical properties of the welded joints are investigated, and the fracture toughness of the joints under ultra-cryogenic conditions is analyzed by crack tip opening displacement (CTOD) tests. The results show that the welded joint exhibits distinct zoning characteristics. The nickel-based weld metal primarily consists of an austenitic columnar crystal matrix and secondary phases. The secondary phases include fine nanoscale banded precipitates and Nb-rich solidification phases formed in the final stage of weld pool solidification. The precipitates are mainly composed of metal carbides (MC) and Laves phases. With the increase of Nb and C content, the number and average particle size of secondary phases in the nickel-based alloy increase, leading to an improved tensile strength of the joint, but reduced cryogenic impact toughness and fracture toughness. The load-notch opening displacement (F-V) curves show that the characteristic load Fm of the joint first increases and then decreases with the addition of Nb and C, while the corresponding characteristic plastic displacement value Vp decreases monotonically with the increase of secondary phases. The fracture surface of the CTOD specimens shows the same zoning characteristics. As the Nb and C content increases, the width of the stable crack propagation region on the fracture surface gradually decreases, indicating a deterioration in the fracture toughness of the weld.
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采用不同Nb、C含量的NiCrMo系合金对低温用9Ni钢进行焊接,研究焊接接头的微观组织与力学性能,并通过裂纹尖端张开位移(CTOD)实验分析接头在超低温环境下的断裂韧性。结果表明:焊接接头存在明显分区,其中镍基焊缝金属主要由奥氏体柱状晶基体+第二相组成。第二相包括细小的纳米级带状析出相和焊缝熔池凝固最后阶段产生的富Nb凝固相。析出相主要由金属碳化物(MC)和Laves相组成。随着Nb、C含量的增加,镍基合金中第二相数量增多、平均粒径增大,从而使接头的抗拉强度提高,但低温冲击韧性与低温断裂韧性均出现下降。载荷-缺口张开位移曲线(F-V曲线)显示,接头的特征载荷Fm随Nb、C含量增加先升高后降低,而相应的特征塑性位移值Vp则随第二相数量增加而单调减小。CTOD试样断口存在相同的分区,随Nb、C含量的增加,断口稳定扩展区宽度逐渐减小,表明焊缝的断裂韧性趋于恶化。
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齐彦昌(1980—),男,正高级工程师,博士,主要从事镍基焊材开发及超低温用镍基合金焊接工艺研发工作,联系地址:北京市海淀区学院南路76号中国钢研科技集团公司焊接研究所(100081),E-mail:
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Materials Characterization,
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165:110390., articleTitle=Microstructure characteristics and properties of fusion boundary in 9%Ni steel joint filled with Ni-based alloy, refAbstract=null), Reference(id=1220810423968912102, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, doi=null, pmid=null, pmcid=null, year=2020, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[19], rfOrder=29, authorNames=沐卫东, journalName=null, refType=null, unstructuredReference=沐卫东. 超低温环境下9Ni钢药芯焊丝电弧焊接头低周疲劳及断裂行为研究[D]. 上海: 上海交通大学,
2020., articleTitle=超低温环境下9Ni钢药芯焊丝电弧焊接头低周疲劳及断裂行为研究, refAbstract=null), Reference(id=1220810424082158318, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, doi=null, pmid=null, pmcid=null, year=2020, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[19], rfOrder=30, authorNames=MU W D, journalName=null, refType=null, unstructuredReference=
MU W D. Low-cycle fatigue and fracture behavior of 9% nickel steel flux cored arc welding joint under cryogenic environment[D]. Shanghai: Shanghai Jiao Tong University,
2020., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1220810410068987994, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, xref=1., ext=[AuthorCompanyExt(id=1220810410102542427, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, companyId=1220810410068987994, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1.Welding Research Institute,Central Iron and Steel Research Institute Co. ,Ltd. ,Beijing 100081,China), AuthorCompanyExt(id=1220810410127708252, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, companyId=1220810410068987994, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1.钢铁研究总院有限公司 焊接研究所,北京 100081)]), AuthorCompany(id=1220810410211594335, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, xref=2., ext=[AuthorCompanyExt(id=1220810410215788640, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, companyId=1220810410211594335, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2.School of Mechanical Engineering & Automation,Beihang University,Beijing 102206,China), AuthorCompanyExt(id=1220810410228371553, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, companyId=1220810410211594335, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2.北京航空航天大学 机械工程及自动化学院,北京 102206)])], figs=[ArticleFig(id=1220810414624002356, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, language=EN, label=Fig.1, caption=
Sampling location of the mechanical properties-testing samples and size for fracture toughness sample of test plates after welding(a)sampling location of the tensile and cryogenic impact samples;(b)sampling location of the CTOD samples;(c)size of the CTOD samples
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试板焊接后力学性能检测试样取样位置及断裂韧性试样尺寸(a)拉伸、低温冲击试样取样位置;(b)CTOD试样取样位置;(c)CTOD试样尺寸
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Macroscopic metallographic structure of welded joints and white rectangular field in metallographic macroscopic samples(a)macroscopic metallographic structure;(b)white rectangular field A;(c)white rectangular field B;(d)white rectangular field C;(e)white rectangular field D
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焊接接头的宏观金相组织及金相宏观试样中的白色矩形视场(a)宏观金相组织;(b)白色矩形视场A;(c)白色矩形视场B;(d)白色矩形视场C;(e)白色矩形视场D
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Microscopic morphology of the welded metal and the characteristics of precipitated phases by TEM(a)microstructure of the fusion zone by OM;(b)microstructure of welded metal by SEM;(c),(d)characteristics of the precipitated phases in welded metal by TEM
, figureFileSmall=8LRWx6JlqnzmJ5V6UKvFNg==, figureFileBig=A8mZQk79Mxgb1OmlhWhUOw==, tableContent=null), ArticleFig(id=1220810415261536617, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, language=CN, label=图3, caption=
焊缝金属的微观形貌及TEM下的析出相特点(a)OM下熔合区的微观组织;(b)SEM下焊缝金属的微观组织;(c),(d)TEM下焊缝金属中析出相特点
, figureFileSmall=8LRWx6JlqnzmJ5V6UKvFNg==, figureFileBig=A8mZQk79Mxgb1OmlhWhUOw==, tableContent=null), ArticleFig(id=1220810415429308793, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, language=EN, label=Fig.4, caption=
XRD patterns of the welded metal in sample 3#, figureFileSmall=GUmdXfwGseo7bjDQrefP0w==, figureFileBig=aOJn+FQzar/9uWaed91QfA==, tableContent=null), ArticleFig(id=1220810415651606920, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, language=CN, label=图4, caption=
3#试样焊缝金属XRD谱图, figureFileSmall=GUmdXfwGseo7bjDQrefP0w==, figureFileBig=aOJn+FQzar/9uWaed91QfA==, tableContent=null), ArticleFig(id=1220810415764853135, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, language=EN, label=Fig.5, caption=
Morphologies and chemical compositions of the secondary phases in the weld metal after electrolytic extraction experiment(a),(b)morphology of extracted secondary phases;(c)chemical composition at point 1;(d)chemical composition at point 2
, figureFileSmall=vnQAcSInX84Neyt8NZuYQg==, figureFileBig=LrSQG/cXazfLz/TuR5df0Q==, tableContent=null), ArticleFig(id=1220810415869710745, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, language=CN, label=图5, caption=
电解萃取实验后焊缝金属中的第二相形貌及化学成分(a),(b)萃取出的第二相形貌;(c)测试点1处的化学成分;(d)测试点2处的化学成分
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Fracture morphologies of impact samples by SEM(a)macroscopic morphology;(b)micro zone of intergranular fracture;(c)characteristics of the fracture dimples by high magnification
, figureFileSmall=dBG9Utye9enFG3irnVVg8w==, figureFileBig=nVjC2+2Ztg15rQunXEvIpA==, tableContent=null), ArticleFig(id=1220810416033288615, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, language=CN, label=图6, caption=
扫描电镜下冲击试样断口形貌(a)宏观形貌;(b)沿晶断裂微区;(c)高倍镜下断口韧窝特点
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CTOD values of different zones in three groups of sample joints(a)welded metal;(b)fusion line of joints
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3组试样接头各区域的CTOD值 (a)焊缝金属;(b)接头熔合线
, figureFileSmall=SzD9qPkzY5IXvu0auNE0jQ==, figureFileBig=Nq6QSCPPi8I9GRpr5jrDJA==, tableContent=null), ArticleFig(id=1220810416360444349, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, language=EN, label=Fig.8, caption=
Force-notch opening displacement curves of the welded metals(1) and fusion line(2) zones in welded joints with different contents of secondary phases(a)sample 1#;(b)sample 2#;(c)sample 3#
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不同第二相含量焊接接头焊缝金属区(1)及熔合线区(2)载荷-缺口张开位移曲线(a)1#试样;(b)2#试样;(c)3#试样
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Particle size distribution of the precipitated phases in welds, figureFileSmall=r78A+Np7zhU0LbkMUj7wvw==, figureFileBig=s2JVLhpMIzm1/3T99wtQLQ==, tableContent=null), ArticleFig(id=1220810416691794387, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, language=CN, label=图9, caption=
焊缝中析出相的粒径分布, figureFileSmall=r78A+Np7zhU0LbkMUj7wvw==, figureFileBig=s2JVLhpMIzm1/3T99wtQLQ==, tableContent=null), ArticleFig(id=1220810416830206431, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, language=EN, label=Fig.10, caption=
Macro fracture morphologies of CTOD samples of welded joints at cryogenic temperatures(1) and microstructures of stable crack propagation region(2)(a)sample 1#;(b)sample 2#;(c)sample 3#
, figureFileSmall=B/jVF8i2TKiy/RmamhNjFQ==, figureFileBig=oXYGkv+zAYabl4QKB9xdlg==, tableContent=null), ArticleFig(id=1220810416935064039, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, language=CN, label=图10, caption=
焊接接头超低温CTOD试样断口宏观形貌(1)和裂纹稳定扩展区微观形貌(2)(a)1#试样;(b)2#试样;(c)3#试样
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SCP length(a) and the Charpy impact energy in welded metals of welded joints(b), figureFileSmall=3FlqKpflO3+D6PgNcfTsuw==, figureFileBig=BFaqn43pbJPgCQns887oew==, tableContent=null), ArticleFig(id=1220810417190916597, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, language=CN, label=图11, caption=
裂纹稳定扩展长度(a)及焊接接头焊缝金属区夏比冲击功(b), figureFileSmall=3FlqKpflO3+D6PgNcfTsuw==, figureFileBig=BFaqn43pbJPgCQns887oew==, tableContent=null), ArticleFig(id=1220810418554065408, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, language=EN, label=Table 1, caption=
Welding process parameters for preparing welded joints
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Interlayer temperature/ ℃ | Current/A | Voltage/V | Welding speed/(cm·min-1) | Heat input/ (kJ·cm-1) |
|---|
| <100 | 130 | 25 | 15 | 13 |
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制备焊接接头的焊接工艺参数
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Interlayer temperature/ ℃ | Current/A | Voltage/V | Welding speed/(cm·min-1) | Heat input/ (kJ·cm-1) |
|---|
| <100 | 130 | 25 | 15 | 13 |
), ArticleFig(id=1220810418805723662, tenantId=1146029695717560320, journalId=1220038251117760515, articleId=1220689392897802930, language=EN, label=Table 2, caption=
Chemical compositions of materials used for experiments (mass fraction/%)
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| Material | Nb | C | Si | Cr | Mo | Fe | W | P | S | Ni |
|---|
| Base metal | | 0.05 | 0.28 | | 0.064 | Bal. | | 0.0031 | 0.002 | 9.2 |
| 1# | 0.29 | 0.03 | 0.25-0.3 | 12.5-13 | 6.2-6.5 | 4.5-4.6 | 1.37-1.42 | <0.01 | <0.01 | Bal. |
| 2# | 0.64 | 0.04 | 0.25-0.3 | 12.5-13 | 6.2-6.5 | 4.5-4.6 | 1.37-1.42 | <0.01 | <0.01 | Bal. |
| 3# | 1.04 | 0.05 | 0.25-0.3 | 12.5-13 | 6.2-6.5 | 4.5-4.6 | 1.37-1.42 | <0.01 | <0.01 | Bal. |
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实验材料的化学成分(质量分数/%)
, figureFileSmall=null, figureFileBig=null, tableContent=
| Material | Nb | C | Si | Cr | Mo | Fe | W | P | S | Ni |
|---|
| Base metal | | 0.05 | 0.28 | | 0.064 | Bal. | | 0.0031 | 0.002 | 9.2 |
| 1# | 0.29 | 0.03 | 0.25-0.3 | 12.5-13 | 6.2-6.5 | 4.5-4.6 | 1.37-1.42 | <0.01 | <0.01 | Bal. |
| 2# | 0.64 | 0.04 | 0.25-0.3 | 12.5-13 | 6.2-6.5 | 4.5-4.6 | 1.37-1.42 | <0.01 | <0.01 | Bal. |
| 3# | 1.04 | 0.05 | 0.25-0.3 | 12.5-13 | 6.2-6.5 | 4.5-4.6 | 1.37-1.42 | <0.01 | <0.01 | Bal. |
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Basic mechanical properties of welded joints
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| Sample | Rm/MPa | KV2(-196 ℃)/J | LE/mm | Fracture location |
|---|
| 1# | 729 | 99.5 | 1.59 | Welded metal |
| 2# | 732 | 75 | 1.30 | Welded metal |
| 3# | 739 | 72 | 1.25 | Base metal |
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焊接接头的常规力学性能
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| Sample | Rm/MPa | KV2(-196 ℃)/J | LE/mm | Fracture location |
|---|
| 1# | 729 | 99.5 | 1.59 | Welded metal |
| 2# | 732 | 75 | 1.30 | Welded metal |
| 3# | 739 | 72 | 1.25 | Base metal |
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