Article(id=1187088798644060693, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1187088798216241684, articleNumber=1009-5438(2022)04-0046-05, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1649347200000, receivedDateStr=2022-04-08, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1760953624639, onlineDateStr=2025-10-20, pubDate=1661356800000, pubDateStr=2022-08-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1760953624639, onlineIssueDateStr=2025-10-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1760953624639, creator=13701087609, updateTime=1760953624639, updator=13701087609, issue=Issue{id=1187088798216241684, tenantId=1146029695717560320, journalId=1185652524569653253, year='2022', volume='48', 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=1760953624537, creator=13701087609, updateTime=1760953945042, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1187090142570365089, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1187088798216241684, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1187090142570365090, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1187088798216241684, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=46, endPage=50, ext={EN=ArticleExt(id=1187340476467265912, articleId=1187088798644060693, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Research and Development of New Type Rare Earth Rail for Heavy Haul Railway of Baotou Steel, columnId=1187340471245357385, journalTitle=Science & Technology of Baotou Steel, columnName=Quality of Variety and Experiment and Research, runingTitle=null, highlight=null, articleAbstract=
With the axle load and transport volume of train increase year by year, it’s necessary to use new type high strength rail to satisfy the operating requirements, prolong the service life of rail and reduce the maintenance of railway. The third generation of rare earth heat-treated rail is successfully developed by Baotou Steel through researching the composition optimization and heat treatment process of rare earth rail. Its tensile strength Rm≥1 300 MPa, percentage elongation after fracture A≥10%, tread hardness HB is 380~430. The experimental study showed that the rare earth was easy to attach to the inclusions in high carbon steel rail so that such inclusions as MnS and Al2O3 were modified; simultaneously, the lamellar spacing of pearlite was reduced and austenite grain size was refined by rare earth so as to improve the toughness of high carbon heavy rail steel. The wear resistance and contact fatigue resistance of rail could be significantly improved with new type heat-treated rare earth rail, which is suitable for heavy haul railway and section with small curve.
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随着列车的轴重和运量逐年增加,需要使用新型高强度钢轨以满足使用要求,延长钢轨使用寿命和减少线路维护。包钢通过对稀土钢轨的成分优化与热处理工艺研究,成功开发第三代稀土热处理钢轨,钢轨的抗拉强度Rm≥1 300 MPa,断后延伸率A≥10%,踏面硬度HB为380~430。试验研究表明,稀土在高碳钢轨中易附集在夹杂物上,可以变质MnS和Al2O3等类型夹杂物;同时稀土可以减小珠光体片层间距和细化奥氏体晶粒尺寸,从而改善高碳重轨钢的韧性。新型热处理稀土钢轨可显著改善钢轨耐磨性和抗接触疲劳性能,适用于重载铁路和小曲线路段。
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王嘉伟(1988-),男,内蒙古包头市人,工程师,现从事钢轨新产品研发工作。
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王嘉伟(1988-),男,内蒙古包头市人,工程师,现从事钢轨新产品研发工作。
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2 内蒙古包钢钢联股份有限公司总工室,内蒙古 包头 014010, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1187340628322042616, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187088798644060693, xref=2, ext=[AuthorCompanyExt(id=1187340628330431225, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187088798644060693, companyId=1187340628322042616, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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39(11):1219-1222., articleTitle=稀土对BNb钢轨踏面区内耗谱的影响, refAbstract=null)], funds=[Fund(id=1187340631614571306, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187088798644060693, awardId=zdzx2018024, language=CN, fundingSource=内蒙古自治区科技重大专项(zdzx2018024), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1187340628225573621, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187088798644060693, xref=1, ext=[AuthorCompanyExt(id=1187340628229767926, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187088798644060693, companyId=1187340628225573621, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China), AuthorCompanyExt(id=1187340628238156535, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187088798644060693, companyId=1187340628225573621, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 内蒙古包钢钢联股份有限公司技术中心,内蒙古 包头 014010)]), AuthorCompany(id=1187340628322042616, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187088798644060693, xref=2, ext=[AuthorCompanyExt(id=1187340628330431225, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187088798644060693, companyId=1187340628322042616, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2 内蒙古包钢钢联股份有限公司总工室,内蒙古 包头 014010)])], figs=[ArticleFig(id=1187340630154953498, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187088798644060693, language=EN, label=null, caption=null, figureFileSmall=5AlCOBheTbtD38GS5sRAKg==, figureFileBig=WrRpR0DKSC3v+I8/F2dGFg==, tableContent=null), ArticleFig(id=1187340630230450971, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187088798644060693, language=CN, label=图1, caption=
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钢轨磨耗试验, figureFileSmall=8pSM3HS+nB8gELO0q3R2RA==, figureFileBig=4sr0aXkz9By0JPQC4PB6Mg==, tableContent=null), ArticleFig(id=1187340630880568098, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187088798644060693, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 钢种 | 抗拉强度Rm /MPa | 延伸率A /% | 踏面硬度 (HBW) |
| U75VH | ≥1 180 | ≥10 | 340~400 |
| U77MnCrH | ≥1 180 | ≥10 | 350~410 |
| U78CrVH | ≥1 280 | ≥10 | 370~420 |
| U76CrREH | ≥1 280 | ≥10 | 370~420 |
| BGREⅢ | ≥1 300 | ≥10 | 380~430 |
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钢轨力学性能指标
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| 钢种 | 抗拉强度Rm /MPa | 延伸率A /% | 踏面硬度 (HBW) |
| U75VH | ≥1 180 | ≥10 | 340~400 |
| U77MnCrH | ≥1 180 | ≥10 | 350~410 |
| U78CrVH | ≥1 280 | ≥10 | 370~420 |
| U76CrREH | ≥1 280 | ≥10 | 370~420 |
| BGREⅢ | ≥1 300 | ≥10 | 380~430 |
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| 编号 | 化学成分(质量分数)/% | 硬度 (HBW) | 抗拉强度 /MPa | 延伸率 /% | 金相 组织 |
| C | Si | Mn | Cr | Nb | RE |
| 1# | 0.78 | 0.69 | 0.87 | | | | 356 | 1 230 | 10.0 | P |
| 2# | 0.80 | 0.71 | 0.91 | 微量 | | | 372 | 1 285 | 9.5 | P |
| 3# | 0.79 | 0.68 | 1.02 | 中等含量 | | | 389 | 1 326 | 9.0 | P |
| 4# | 0.80 | 0.75 | 0.93 | 中等含量 | | 0.022 | 392 | 1 345 | 10.0 | P |
| 5# | 0.81 | 0.82 | 0.95 | 中等含量 | 微量 | 0.020 | 401 | 1 350 | 11.0 | P |
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试验钢化学成分及性能
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| 编号 | 化学成分(质量分数)/% | 硬度 (HBW) | 抗拉强度 /MPa | 延伸率 /% | 金相 组织 |
| C | Si | Mn | Cr | Nb | RE |
| 1# | 0.78 | 0.69 | 0.87 | | | | 356 | 1 230 | 10.0 | P |
| 2# | 0.80 | 0.71 | 0.91 | 微量 | | | 372 | 1 285 | 9.5 | P |
| 3# | 0.79 | 0.68 | 1.02 | 中等含量 | | | 389 | 1 326 | 9.0 | P |
| 4# | 0.80 | 0.75 | 0.93 | 中等含量 | | 0.022 | 392 | 1 345 | 10.0 | P |
| 5# | 0.81 | 0.82 | 0.95 | 中等含量 | 微量 | 0.020 | 401 | 1 350 | 11.0 | P |
), ArticleFig(id=1187340631199335206, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187088798644060693, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 钢种 | C | Si | Mn | P | S | Cr+Nb | RE |
| BGREⅢ | 0.70~0.90 | 0.60~0.90 | 0.80~1.10 | ≤0.020 | ≤0.020 | ≤0.70 | 加入量大于0.02 |
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BGREⅢ钢轨化学成分范围(质量分数) %
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| 钢种 | C | Si | Mn | P | S | Cr+Nb | RE |
| BGREⅢ | 0.70~0.90 | 0.60~0.90 | 0.80~1.10 | ≤0.020 | ≤0.020 | ≤0.70 | 加入量大于0.02 |
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| Rm/MPa | A/% | 踏面硬度(HBW) | 横断面硬度(HRC) |
| A1、B1、C1、D1、E1 | A4、B5、C5、D3、E3 |
| 最大值 | 1 365 | 12.5 | 398 | 40.3 | 37.8 |
| 最小值 | 1 312 | 10.0 | 385 | 38.2 | 36.5 |
| 平均值 | 1 342 | 11.0 | 392 | 38.9 | 37.1 |
| 技术指标 | ≥1 300 | ≥10.0 | 380~430 | 37.0~44.0 | ≥36.0 |
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BGREⅢ钢轨工业试制结果
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| Rm/MPa | A/% | 踏面硬度(HBW) | 横断面硬度(HRC) |
| A1、B1、C1、D1、E1 | A4、B5、C5、D3、E3 |
| 最大值 | 1 365 | 12.5 | 398 | 40.3 | 37.8 |
| 最小值 | 1 312 | 10.0 | 385 | 38.2 | 36.5 |
| 平均值 | 1 342 | 11.0 | 392 | 38.9 | 37.1 |
| 技术指标 | ≥1 300 | ≥10.0 | 380~430 | 37.0~44.0 | ≥36.0 |
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