Article(id=1309475203424543566, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1309475195581198782, articleNumber=null, orderNo=null, doi=10.19710/J.cnki.1003-8817.20250270, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=null, receivedDateStr=null, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1790132817369, onlineDateStr=2026-09-23, pubDate=1776614400000, pubDateStr=2026-04-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1790132817369, onlineIssueDateStr=2026-09-23, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1790132817369, creator=13701087609, updateTime=1790132817369, updator=13701087609, issue=Issue{id=1309475195581198782, tenantId=1146029695717560320, journalId=1189873562199433220, year='2026', volume='', issue='4', pageStart='1', pageEnd='72', issueExtLink='null', onlineDate='null', pubDate='1776614400000', pubDateStr='2026-04-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1790132815498, creator='13701087609', updateTime=1790133009559, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1309476009590751261, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1309475195581198782, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1309476009590751262, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1309475195581198782, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=44, endPage=49, ext={EN=ArticleExt(id=1309475203802030927, articleId=1309475203424543566, tenantId=1146029695717560320, journalId=1189873562199433220, language=EN, title=Research on Strength and Toughness Properties of Niobium-vanadium Composite Microalloyed 2 GPa Hot Forming Steel, columnId=null, journalTitle=Automobile Technology & Material, columnName=null, runingTitle=null, highlight=null, articleAbstract=

In this paper, a systematic study of niobium-vanadium composite microalloyed aluminum-silicon coated hot-forming steel 34MnB5NbV is carried out by various material mechanical property tests and microstructure characterization methods, such as room temperature tensile test, three-point bending test, scanning electron microscope, and transmission electron microscope. The results show that after quenching, the yield strength of the material is 1 365 MPa, the tensile strength is 2 056 MPa, the elongation is 4.9%, and the bending angle is 58.7°. After bake hardening process, the yield strength of the material is increased by 127 MPa, the tensile strength is decreased by 144 MPa, the elongation is increased by 0.5%, and the bending angle is increased by 6.1°. After niobium-vanadium composite microalloyed 34MnB5NbV steel hot forming, the precipitation phase is (Nb, V) C composite precipitated phase, which has better fine grain strengthening and precipitation strengthening effect to improve the strength and toughness of the hot forming steel, so that the comprehensive mechanical properties achieve better. Moreover, in order to fully evaluate the bending toughness of the material, the three-point bending test is carried out on the door anti-collision beam part made by 34MnB5NbV steel. The maximum bending force and bending energy of the part showed significant improvements compared to those of the 1 500 MPa part, indicating good bending toughness and meeting the application requirements.

, authors=Dan Qi¹, Guangxiang Cao¹, Dechao Xu², Ziming Tang¹, Meng Ju¹, Longqing Zhao¹, authorsList=Dan Qi, Guangxiang Cao, Dechao Xu, Ziming Tang, Meng Ju, Longqing Zhao, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1309475204066272080, articleId=1309475203424543566, tenantId=1146029695717560320, journalId=1189873562199433220, language=CN, title=铌钒复合微合金化2 GPa热成形钢的强韧性研究, columnId=1190284221747925509, journalTitle=汽车工艺与材料, columnName=材料应用, runingTitle=null, highlight=null, articleAbstract=

通过室温拉伸试验、三点弯曲试验、扫描电子显微镜、透射电子显微镜等多种材料力学性能试验与微观组织表征手段，对Nb、V复合微合金化的铝硅镀层热成形钢34MnB5NbV进行了系统研究。结果表明：淬火后，材料的屈服强度为1 365 MPa，抗拉强度为2 056 MPa，断后伸长率为4.9%，极限尖冷弯角为58.7°；经烘烤硬化后，材料的屈服强度提高了127 MPa，抗拉强度降低了144 MPa，断后伸长率提高了0.5%，极限尖冷弯角提高了6.1°。Nb、V复合微合金化34MnB5NbV钢热成形后，析出相为(Nb, V)C复合析出相，其具有较好的细晶强化和析出强化效果，增强了热成形钢的强韧性，使其综合力学性能指标更优。此外，为充分评价材料的弯曲韧性，对34MnB5NbV钢车门防撞梁零件进行三点弯曲试验，零件的最大弯曲力和弯曲能量较1 500 MPa零件均有较大提升，表现出良好的弯曲韧性，满足应用要求。

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齐丹（1983—），女，学士学位，正高级工程师，研究方向为汽车用新材料开发及应用。

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齐丹（1983—），女，学士学位，正高级工程师，研究方向为汽车用新材料开发及应用。

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