Article(id=1199809976320491580, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1199809968984650567, articleNumber=1009-5438(2022)05-0065-05, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1658937600000, receivedDateStr=2022-07-28, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1763986589745, onlineDateStr=2025-11-24, pubDate=1666627200000, pubDateStr=2022-10-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763986589745, onlineIssueDateStr=2025-11-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763986589745, creator=13701087609, updateTime=1763986589745, updator=13701087609, issue=Issue{id=1199809968984650567, tenantId=1146029695717560320, journalId=1185652524569653253, year='2022', volume='48', issue='5', 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=1763986587997, creator=13701087609, updateTime=1764034198143, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1200009660469183174, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1199809968984650567, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1200009660469183175, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1199809968984650567, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=65, endPage=69, ext={EN=ArticleExt(id=1199809976697978956, articleId=1199809976320491580, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Study on Optimizing Mn Content of U71Mn Rail of Baotou Steel, columnId=1187340471245357385, journalTitle=Science & Technology of Baotou Steel, columnName=Quality of Variety and Experiment and Research, runingTitle=null, highlight=null, articleAbstract=
In order to improve product quality and strengthen quality monitoring of high speed rail, the chemical composition of U71Mn rail is optimized, Mn content in steel is reduced and rolling process is controlled as well as the trial productions are carried out for such whole series of sections as 60 N, 60 kg/m, 50 kg/m, QU120, QU100 and QU80 of U71Mn. The results showed that the tensile strength was reduced by 7.2 MPa and mean value reached 950 MPa, tread hardness (HB) was reduced by 2.8 and mean value reached 269.2 as well as elongation is basically unchanged by comparing the performances of U71Mn rail with those before optimization. Moreover, the ideal perlite structure is obtained, performances of rail could all meet the standard requirements and is with enough margin so that the effects are better.
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为改善产品质量,加强高速钢轨质量监控,对U71Mn钢轨化学成分进行优化,降低钢中Mn含量,同时控制轧制工艺,在U71Mn 60N、60 kg/m、50 kg/m、QU120、QU100、QU80等全系列断面进行试制。结果表明:Mn含量优化后U71Mn钢轨性能与优化前U71Mn钢轨比较,U71Mn钢轨抗拉强度较优化前降低7.2 MPa,均值达到950 MPa,踏面硬度降低2.8,均值达到269.2,延伸率基本不变,获得理想的珠光体组织,钢轨性能均能满足标准要求,并且具有足够富余量,取得了较好的效果。
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董 捷(1987-),女,内蒙古包头市人,硕士,高级工程师,现从事钢轨新产品开发工作。
, authorsList=董捷, 梁正伟, 王永明, 郝振宇, 李永强, 魏轶彬)}, authors=[Author(id=1200030230875308106, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1200030231068246106, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, authorId=1200030230875308106, language=EN, stringName=Jie Dong, firstName=Jie, middleName=null, lastName=Dong, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1200030231185686624, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, authorId=1200030230875308106, language=CN, stringName=董捷, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 内蒙古包钢钢联股份有限公司技术中心, 内蒙古 包头 014010, bio={"content":"
董 捷(1987-),女,内蒙古包头市人,硕士,高级工程师,现从事钢轨新产品开发工作。
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董 捷(1987-),女,内蒙古包头市人,硕士,高级工程师,现从事钢轨新产品开发工作。
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1 内蒙古包钢钢联股份有限公司技术中心, 内蒙古 包头 014010)])]), Author(id=1200030231315710058, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, orderNo=1, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1200030231412179061, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, authorId=1200030231315710058, language=EN, stringName=Zheng-wei Liang, firstName=Zheng-wei, middleName=null, lastName=Liang, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1200030231504453755, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, authorId=1200030231315710058, language=CN, stringName=梁正伟, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 内蒙古包钢钢联股份有限公司技术中心, 内蒙古 包头 014010, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1200030230300688433, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, xref=1, ext=[AuthorCompanyExt(id=1200030230330048562, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, companyId=1200030230300688433, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1 内蒙古包钢钢联股份有限公司技术中心, 内蒙古 包头 014010)])]), Author(id=1200030232645304448, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1200030232871796876, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, authorId=1200030232645304448, language=EN, stringName=Yong-ming Wang, firstName=Yong-ming, middleName=null, lastName=Wang, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
2, address=
2 Chief Engineer Office of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1200030233064734870, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, authorId=1200030232645304448, language=CN, stringName=王永明, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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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=1200030230443294775, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, xref=2, ext=[AuthorCompanyExt(id=1200030230455877688, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, companyId=1200030230443294775, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 Chief Engineer Office of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China), AuthorCompanyExt(id=1200030230468460601, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, companyId=1200030230443294775, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 内蒙古包钢钢联股份有限公司总工室, 内蒙古 包头 014010)])]), Author(id=1200030233161203872, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, orderNo=3, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1200030233274450094, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, authorId=1200030233161203872, language=EN, stringName=Zhen-yu Hao, firstName=Zhen-yu, middleName=null, lastName=Hao, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
3, address=
3 Steel-making Plant of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1200030233387696311, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, authorId=1200030233161203872, language=CN, stringName=郝振宇, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
3, address=
3 内蒙古包钢钢联股份有限公司炼钢厂, 内蒙古 包头 014010, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1200030230569123901, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, xref=3, ext=[AuthorCompanyExt(id=1200030230577512510, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, companyId=1200030230569123901, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3 Steel-making Plant of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China), AuthorCompanyExt(id=1200030230585901120, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, companyId=1200030230569123901, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3 内蒙古包钢钢联股份有限公司炼钢厂, 内蒙古 包头 014010)])]), Author(id=1200030233484165306, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, orderNo=4, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1200030233622577349, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, authorId=1200030233484165306, language=EN, stringName=Yong-qiang Li, firstName=Yong-qiang, middleName=null, lastName=Li, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
4, address=
4 Rail and Beam Rolling Plant of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1200030233735823568, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, authorId=1200030233484165306, language=CN, stringName=李永强, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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4 内蒙古包钢钢联股份有限公司轨梁厂, 内蒙古 包头 014010, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1200030230673981506, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, xref=4, ext=[AuthorCompanyExt(id=1200030230678175812, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, companyId=1200030230673981506, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
4 Rail and Beam Rolling Plant of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China), AuthorCompanyExt(id=1200030230686564421, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, companyId=1200030230673981506, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
4 内蒙古包钢钢联股份有限公司轨梁厂, 内蒙古 包头 014010)])]), Author(id=1200030233857458393, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, orderNo=5, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1200030234075562215, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, authorId=1200030233857458393, language=EN, stringName=Yi-bin Wei, firstName=Yi-bin, middleName=null, lastName=Wei, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
3, address=
3 Steel-making Plant of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1200030234226557166, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, authorId=1200030233857458393, language=CN, stringName=魏轶彬, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
3, address=
3 内蒙古包钢钢联股份有限公司炼钢厂, 内蒙古 包头 014010, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1200030230569123901, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, xref=3, ext=[AuthorCompanyExt(id=1200030230577512510, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, companyId=1200030230569123901, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3 Steel-making Plant of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China), AuthorCompanyExt(id=1200030230585901120, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, companyId=1200030230569123901, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3 内蒙古包钢钢联股份有限公司炼钢厂, 内蒙古 包头 014010)])])], keywords=[Keyword(id=1200030234453049597, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, language=EN, orderNo=1, keyword=rail), Keyword(id=1200030234599850243, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, language=EN, orderNo=2, keyword=U71Mn), Keyword(id=1200030234734067976, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, language=EN, orderNo=3, keyword=Mn content), Keyword(id=1200030234864091413, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, language=CN, orderNo=1, keyword=钢轨), Keyword(id=1200030234973143327, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, language=CN, orderNo=2, keyword=U71Mn), Keyword(id=1200030235145109800, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, language=CN, orderNo=3, keyword=Mn含量)], refs=[Reference(id=1200030239507186124, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, doi=null, pmid=null, pmcid=null, year=2020, volume=38, issue=6, pageStart=38, pageEnd=42, url=null, language=null, rfNumber=[1], rfOrder=0, authorNames=陈志强, journalName=铁道技术监督, refType=null, unstructuredReference=陈志强. U71Mn钢轨闪光焊接头暗色灰斑成因及消除方法[J].
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2018,(12):83-86., articleTitle=钢轨闪光焊接头探伤异常的设备和工艺因素, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1200030230300688433, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, xref=1, ext=[AuthorCompanyExt(id=1200030230330048562, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1199809976320491580, companyId=1200030230300688433, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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| 钢种 | C | Si | Mn | P | S | Al |
| U71Mn铁标标准要求 | 0.65~0.80 | 0.15~0.58 | 0.70~1.20 | ≤0.025 | ≤0.025 | ≤0.010 |
| U71Mn | 0.69~0.75 | 0.30~0.40 | 1.00~1.20 | ≤0.025 | ≤0.025 | ≤0.010 |
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U71Mn化学成分技术要求(质量分数) %
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| 钢种 | C | Si | Mn | P | S | Al |
| U71Mn铁标标准要求 | 0.65~0.80 | 0.15~0.58 | 0.70~1.20 | ≤0.025 | ≤0.025 | ≤0.010 |
| U71Mn | 0.69~0.75 | 0.30~0.40 | 1.00~1.20 | ≤0.025 | ≤0.025 | ≤0.010 |
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抗拉强度Rm /MPa | 断后伸长率A /% | 轨头顶面中心线 硬度(HBW) |
| ≥880 | ≥10 | 260~300 |
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U71Mn力学性能技术要求
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抗拉强度Rm /MPa | 断后伸长率A /% | 轨头顶面中心线 硬度(HBW) |
| ≥880 | ≥10 | 260~300 |
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| 钢种 | 化学成分(质量分数)/% | | 力学性能 |
| C | Si | Mn | P | S | 抗拉强度 Rm/MPa | 延伸率A /% | 踏面硬度 (HBW) |
| 包钢U71Mn | 0.71 | 0.35 | 1.10 | 0.017 | 0.002 | | 957.4 | 12.1 | 272.0 |
| 攀钢U71Mn | 0.73 | 0.39 | 0.96 | 0.015 | 0.008 | | 970.0 | 12.2 | 273.6 |
| 武钢U71Mn | 0.71 | 0.38 | 0.96 | 0.015 | 0.006 | | 945.7 | 13.8 | 274.0 |
| 邯钢U71Mn | 0.71 | 0.36 | 1.01 | 0.015 | 0.002 | | 1 040.0 | 14.0 | 280.4 |
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钢轨生产企业U71Mn化学成分及力学性能
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| 钢种 | 化学成分(质量分数)/% | | 力学性能 |
| C | Si | Mn | P | S | 抗拉强度 Rm/MPa | 延伸率A /% | 踏面硬度 (HBW) |
| 包钢U71Mn | 0.71 | 0.35 | 1.10 | 0.017 | 0.002 | | 957.4 | 12.1 | 272.0 |
| 攀钢U71Mn | 0.73 | 0.39 | 0.96 | 0.015 | 0.008 | | 970.0 | 12.2 | 273.6 |
| 武钢U71Mn | 0.71 | 0.38 | 0.96 | 0.015 | 0.006 | | 945.7 | 13.8 | 274.0 |
| 邯钢U71Mn | 0.71 | 0.36 | 1.01 | 0.015 | 0.002 | | 1 040.0 | 14.0 | 280.4 |
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| C | Si | Mn | P | S | Al |
| 0.70~0.75 | 0.30~0.40 | 0.90~0.99 | ≤0.025 | ≤0.025 | ≤0.004 |
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低锰U71Mn化学成分控制要求(质量分数) %
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| C | Si | Mn | P | S | Al |
| 0.70~0.75 | 0.30~0.40 | 0.90~0.99 | ≤0.025 | ≤0.025 | ≤0.004 |
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| 项目 | C | Si | Mn | P | S |
| 低锰U71Mn | 0.72 | 0.37 | 0.95 | 0.016 | 0.003 |
| U71Mn | 0.72 | 0.35 | 1.06 | 0.017 | 0.003 |
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低锰U71Mn与U71Mn化学成分比较(质量分数) %
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| 项目 | C | Si | Mn | P | S |
| 低锰U71Mn | 0.72 | 0.37 | 0.95 | 0.016 | 0.003 |
| U71Mn | 0.72 | 0.35 | 1.06 | 0.017 | 0.003 |
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| 项目 | 抗拉强度Rm /MPa | 延伸率A /% | 踏面硬度 (HBW) |
| 低锰U71Mn | 950.0 | 11.7 | 269.2 |
| U71Mn | 957.2 | 12.3 | 272.0 |
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低锰U71Mn钢轨与U71Mn钢轨性能
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| 项目 | 抗拉强度Rm /MPa | 延伸率A /% | 踏面硬度 (HBW) |
| 低锰U71Mn | 950.0 | 11.7 | 269.2 |
| U71Mn | 957.2 | 12.3 | 272.0 |
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