Article(id=1321826925312590775, tenantId=1146029695717560320, journalId=1268266715432370238, issueId=1321826892336976457, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1006-4613.2026.05.006, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=null, receivedDateStr=null, revisedDate=1751472000000, revisedDateStr=2025-07-03, acceptedDate=null, acceptedDateStr=null, onlineDate=1793077697351, onlineDateStr=2026-10-27, pubDate=1791561600000, pubDateStr=2026-10-10, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793077697351, onlineIssueDateStr=2026-10-27, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793077697351, creator=13701087609, updateTime=1793077697351, updator=13701087609, issue=Issue{id=1321826892336976457, tenantId=1146029695717560320, journalId=1268266715432370238, year='2026', volume='', issue='5', pageStart='1', pageEnd='72', issueExtLink='null', onlineDate='null', pubDate='1791561600000', pubDateStr='2026-10-10', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1793077689489, creator='13701087609', updateTime=1793077838314, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1321827516680093821, tenantId=1146029695717560320, journalId=1268266715432370238, issueId=1321826892336976457, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1321827516680093822, tenantId=1146029695717560320, journalId=1268266715432370238, issueId=1321826892336976457, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=39, endPage=42, ext={EN=ArticleExt(id=1321826925660718008, articleId=1321826925312590775, tenantId=1146029695717560320, journalId=1268266715432370238, language=EN, title=Study on the Fatigue Properties of 600 MPa and 700 MPa Grade Hot Rolling Automobile Beam Steel Sheets, columnId=1268934131263115797, journalTitle=Angang Technology, columnName=Research and Development, runingTitle=null, highlight=null, articleAbstract=

Based on low carbon and Nb-Ti complex designing to trial-produce the two degrees ultra high strength automobile beam steels of 600 MPa grade (600L) and 700 MPa grade (700L), the produce processes and parameters of ultra high strength beam steels of 600 MPa grade and 700 MPa grade were also mentioned. Fatigue tests were performed on the steel sheets of both grades, along with bench fatigue tests on fabricated beam parts. The results showed that the fatigue limit of 700 L beam steel sheet was slightly higher than that of 600L beam steel sheet, while the fatigue ratio of 600L beam steel sheet was higher than that of 700L beam steel sheet. However, the bench fatigue life of the beam parts made from 600L beam steel sheet was much longer than that of 700L beam steel sheet. This indicated that the fatigue resistance of materials with different strength grades couldn’t be simply compared by fatigue limit alone. Instead, the fatigue ratio, by correlating the fatigue limit and static strength of materials, indirectly reflected the key characteristics of materials under cyclic loading, providing a more scientific and comprehensive characterization of the fatigue performance. The Cr+N micro-alloyed design in 600L beam steel sheet enhanced its fatigue performance through a triple mechanism of solid solution strengthening, fine grain strengthening and resistance improvement, which enabled the 600L beam steel sheet to achieve a stepwise improvement in fatigue performance.

, authors=Xiaoguang SHI^{1, 2}, Junxiong WANG^{1, 2}, Yi DONG^{1, 2}, Chengqian SUN^{1, 2}, Hongying SU^{1, 2}, authorsList=Xiaoguang SHI, Junxiong WANG, Yi DONG, Chengqian SUN, Hongying SU, 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=1321826927460074426, articleId=1321826925312590775, tenantId=1146029695717560320, journalId=1268266715432370238, language=CN, title=600 MPa和700 MPa级热轧汽车大梁用钢板疲劳性能研究, columnId=1268934131426693655, journalTitle=鞍钢技术, columnName=研究与开发, runingTitle=null, highlight=null, articleAbstract=

采用低C及Nb、Ti复合成分设计，试制了600 MPa级别（600L）和700 MPa级别（700L）两种超高强汽车大梁钢，并给出了其生产试制过程及工艺参数。对两个级别钢种进行了疲劳性能测试，以及制造成大梁零件的台架疲劳对比试验。结果表明，700L大梁钢板的疲劳极限略高于600L大梁钢板，而疲劳比低于600L大梁钢板，但制成大梁零件台架后，600L大梁钢板的疲劳寿命远高于700L大梁钢板。这表明不同强度等级的材料的抗疲劳性能不能仅用疲劳极限来比较。而疲劳比通过关联材料的疲劳极限和静态强度，间接反映了材料在循环载荷下的关键特性，能更科学、全面地表征材料的疲劳性能。600L大梁钢板采用Cr+N组合设计，通过固溶强化+细晶强化+环境抗力的协同作用，实现其疲劳性能的阶跃式提升。

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^2.鞍钢集团钢铁研究院，辽宁　鞍山　114009, bio={"content":"

时晓光，教授级高级工程师，1989年毕业于沈阳工业大学金属材料及热处理专业。E-mail：xiaoguangshi@163.com

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时晓光，教授级高级工程师，1989年毕业于沈阳工业大学金属材料及热处理专业。E-mail：xiaoguangshi@163.com

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