Article(id=1198265194154656481, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198265193424847582, articleNumber=1009-5438(2023)04-0089-06, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1681488000000, receivedDateStr=2023-04-15, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1763618284976, onlineDateStr=2025-11-20, pubDate=1692892800000, pubDateStr=2023-08-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763618284976, onlineIssueDateStr=2025-11-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763618284976, creator=13701087609, updateTime=1763618284976, updator=13701087609, issue=Issue{id=1198265193424847582, tenantId=1146029695717560320, journalId=1185652524569653253, year='2023', volume='49', issue='4', pageStart='1', pageEnd='98', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1763618284803, creator=13701087609, updateTime=1763621606301, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1198279124902047995, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198265193424847582, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1198279124902047996, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198265193424847582, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=89, endPage=94, ext={EN=ArticleExt(id=1198265194381148900, articleId=1198265194154656481, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Discussions on Relation between Test Data of Threshold Values of Crack Expansion and Performances of Rails, columnId=1187102804364640261, journalTitle=Science & Technology of Baotou Steel, columnName=Others, runingTitle=null, highlight=null, articleAbstract=
In the paper, the relations between such factors as the microstructure of rails, inclusions, excessive hydrogen and residual stress and Crack Length-Cycle curve are analyzed through the data and diagrams obtained by the tests based on the test of threshold value of crack expansion ΔKth for U71Mn, U75V and U20Mn quenched rails as well as U75V test steel with the rare earth, lanthanum and cerium. Moreover, the effects of adding the rare earth, lanthanum alloy and cerium alloy into rails on crack growth of rails are analyzed, which could provide new means for analyzing the performances of rails and prolonging service life of rails.
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文章在U71Mn、U75V和U20Mn淬火轨、以及加稀土镧和铈的U75V试验钢裂扩门槛值ΔKth试验的基础上,通过试验获取的数据和图表,分析了钢轨组织、夹杂物、氢超标和残余应力等因素与Crack Length-Cycle曲线的关系,以及钢轨加入稀土镧合金、铈合金之后对钢轨裂纹扩展的影响,为分析钢轨性能、延长钢轨寿命提供新的手段。
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李培德(1965-),男,河北省阳原县人,高级工程师,现从事金属材料物理性能检测研究工作。
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李培德(1965-),男,河北省阳原县人,高级工程师,现从事金属材料物理性能检测研究工作。
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李培德(1965-),男,河北省阳原县人,高级工程师,现从事金属材料物理性能检测研究工作。
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43(2):23-25., articleTitle=包钢贝氏体钢冶炼中氢的控制研究, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1198277531699871854, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198265194154656481, xref=null, ext=[AuthorCompanyExt(id=1198277531708260463, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198265194154656481, companyId=1198277531699871854, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China), AuthorCompanyExt(id=1198277531716649072, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198265194154656481, companyId=1198277531699871854, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=内蒙古包钢钢联股份有限公司技术中心,内蒙古 包头 014010)])], figs=[ArticleFig(id=1198277534971429019, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198265194154656481, language=EN, label=null, caption=null, figureFileSmall=U4vL8IgwinBbEtsdXfF9DQ==, figureFileBig=XCvhFOJXRF1ppZdkj4qXRQ==, tableContent=null), ArticleFig(id=1198277535034343580, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198265194154656481, language=CN, label=图1, caption=
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| 试样编号 | 品名或规格 | Rp0.2/MPa | Rm/MPa | A/% | 金相组织 |
| 16801151 | U75V淬火轨 | 837 | 1 256 | 14.0 | P+F(少) |
| 16901669 | U71Mn淬火轨 | 729 | 1 148 | 14.5 | P+F(少) |
| 283 | U20Mn淬火轨 | 1 182 | 1 358 | 15.5 | B+M+A(少) |
| 4 | U75V试验钢(加稀土铈) | 845 | 1 220 | 13.0 | P+F(少) |
| 5 | U75V试验钢(加稀土镧) | 850 | 1 228 | 13.5 | P+F(少) |
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常温下钢轨的力学性能和金相组织
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| 试样编号 | 品名或规格 | Rp0.2/MPa | Rm/MPa | A/% | 金相组织 |
| 16801151 | U75V淬火轨 | 837 | 1 256 | 14.0 | P+F(少) |
| 16901669 | U71Mn淬火轨 | 729 | 1 148 | 14.5 | P+F(少) |
| 283 | U20Mn淬火轨 | 1 182 | 1 358 | 15.5 | B+M+A(少) |
| 4 | U75V试验钢(加稀土铈) | 845 | 1 220 | 13.0 | P+F(少) |
| 5 | U75V试验钢(加稀土镧) | 850 | 1 228 | 13.5 | P+F(少) |
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| 名称 | ΔK=13.5 MPam1/2 | ΔK=10 MPam1/2 |
| 标准要求 | 55×10-6 | 17×10-6 |
| 16901669-5试样 | 21.6×10-6 | 10.8×10-6 |
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U71Mn 60 kg/m淬火轨裂纹扩展速率(da/dN) mm/cycle
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| 名称 | ΔK=13.5 MPam1/2 | ΔK=10 MPam1/2 |
| 标准要求 | 55×10-6 | 17×10-6 |
| 16901669-5试样 | 21.6×10-6 | 10.8×10-6 |
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| 名称 | ΔK=13.5 MPam1/2 | ΔK=10 MPam1/2 |
| 标准要求 | 55×10-6 | 17×10-6 |
| 283-3试样 | 55.4×10-6 | 64.8×10-6 |
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U20Mn 60 kg/m淬火贝氏体钢轨裂纹扩展速率(da/dN) mm/cycle
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| 名称 | ΔK=13.5 MPam1/2 | ΔK=10 MPam1/2 |
| 标准要求 | 55×10-6 | 17×10-6 |
| 283-3试样 | 55.4×10-6 | 64.8×10-6 |
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| 项目 | 编号 | ΔK=13.5 MPam1/2 | ΔK=10 MPam1/2 |
| 未去应力试样 | 16801151-1 | 46.5×10-6 | 28.7×10-6 |
| 16801151-2 | 54.3×10-6 | 31.6×10-6 |
| 16801151-3 | 53.2×10-6 | 30.1×10-6 |
| 去应力试样 | 16801151-4 | 24.6×10-6 | 10.7×10-6 |
| 16801151-5 | 23.4×10-6 | 11.5×10-6 |
| 16801151-6 | 22.8×10-6 | 10.1×10-6 |
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U75V 60 kg/m淬火轨疲劳裂纹扩展速率(da/dN) mm/cycle
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| 项目 | 编号 | ΔK=13.5 MPam1/2 | ΔK=10 MPam1/2 |
| 未去应力试样 | 16801151-1 | 46.5×10-6 | 28.7×10-6 |
| 16801151-2 | 54.3×10-6 | 31.6×10-6 |
| 16801151-3 | 53.2×10-6 | 30.1×10-6 |
| 去应力试样 | 16801151-4 | 24.6×10-6 | 10.7×10-6 |
| 16801151-5 | 23.4×10-6 | 11.5×10-6 |
| 16801151-6 | 22.8×10-6 | 10.1×10-6 |
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| 项目 | ΔK=13.5 MPam1/2 | ΔK=10 MPam1/2 |
| 标准要求 | 55×10-6 | 17×10-6 |
| 16801151-8(U75V未加稀土试样) | 21.7×10-6 | 11.9×10-6 |
| 16801151-9(U75V未加稀土试样) | 22.5×10-6 | 12.1×10-6 |
| 4-4(U75V加稀土铈合金试样) | 29.5×10-6 | 14.6×10-6 |
| 5-3(U75V加稀土镧合金试样) | 25.5×10-6 | 13.3×10-6 |
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| 项目 | ΔK=13.5 MPam1/2 | ΔK=10 MPam1/2 |
| 标准要求 | 55×10-6 | 17×10-6 |
| 16801151-8(U75V未加稀土试样) | 21.7×10-6 | 11.9×10-6 |
| 16801151-9(U75V未加稀土试样) | 22.5×10-6 | 12.1×10-6 |
| 4-4(U75V加稀土铈合金试样) | 29.5×10-6 | 14.6×10-6 |
| 5-3(U75V加稀土镧合金试样) | 25.5×10-6 | 13.3×10-6 |
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