Article(id=1187027207311471104, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1187027204178326004, articleNumber=1009-5438(2024)06-0075-04, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1729612800000, receivedDateStr=2024-10-23, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1760938940122, onlineDateStr=2025-10-20, pubDate=1735056000000, pubDateStr=2024-12-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1760938940122, onlineIssueDateStr=2025-10-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1760938940122, creator=13701087609, updateTime=1760938940122, updator=13701087609, issue=Issue{id=1187027204178326004, tenantId=1146029695717560320, journalId=1185652524569653253, year='2024', volume='50', issue='6', 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=1760938939375, creator=13701087609, updateTime=1760939191531, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1187028261868548309, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1187027204178326004, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1187028261868548310, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1187027204178326004, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=75, endPage=78, ext={EN=ArticleExt(id=1187100783209234804, articleId=1187027207311471104, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Cause Analysis on Cracking when Straighten Rail, columnId=1187095652984042303, journalTitle=Science & Technology of Baotou Steel, columnName=Variety Quality and Experimental Study, runingTitle=null, highlight=null, articleAbstract=
The rail head of 43 kg/m rail with material of U71Mn after induction hardening by user is cracked during straightening process. The rail is inspected with such methods as the chemical analysis, fractography, metallography detection and scanning electron microscope analysis. The results showed that the chemical composition could meet standard requirements, fracture morphology of fracture origin and microstructure were abnormal, melting holes and oxidation characteristics at grain boundary could be seen locally. The offline quenching induction heating process is judged to be abnormal. Different degrees of overburning and overheating are formed in near surface area at round corner on one side of rail, i.e. oxidation and melting at grain boundary. The abnormal microstructure of coarse cementite+ledeburite is formed after quenching so that the rail is cracked in subsequent straightening process.
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材质为U71Mn的43 kg/m钢轨,用户对其进行感应加热淬火后,在调直过程中轨头发生开裂。采用化学分析、断口观察、金相检测及扫描电镜分析等方法对该钢轨进行了检验。结果表明,化学成分符合标准要求,断裂源部位的断口形貌和显微组织异常,局部可见晶界熔化孔洞及晶界氧化特征,判断离线淬火感应加热工序异常,在钢轨一侧圆角部位的近表面区域形成不同程度的过烧、过热,晶界氧化、熔化,并在淬火冷却后形成了粗大渗碳体+莱氏体异常组织,导致钢轨在后续调直过程中发生开裂。
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李智丽(1971-),女,辽宁省盘锦市人,硕士,正高级工程师,现从事金属材料热处理及物理检测工作。
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李智丽(1971-),女,辽宁省盘锦市人,硕士,正高级工程师,现从事金属材料热处理及物理检测工作。
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李智丽(1971-),女,辽宁省盘锦市人,硕士,正高级工程师,现从事金属材料热处理及物理检测工作。
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理化检验(物理分册),
2023,
59(4):29-30,61., articleTitle=驱动轮轴断裂原因, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1187100924439839482, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027207311471104, xref=null, ext=[AuthorCompanyExt(id=1187100924448228091, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027207311471104, companyId=1187100924439839482, 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=1187100924456616700, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027207311471104, companyId=1187100924439839482, 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=1187100924515336957, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027207311471104, xref=null, ext=[AuthorCompanyExt(id=1187100924523725566, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027207311471104, companyId=1187100924515336957, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2. Manufacturing Dept. of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China), AuthorCompanyExt(id=1187100924532114175, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027207311471104, companyId=1187100924515336957, 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制造部,内蒙古 包头 014010)])], figs=[ArticleFig(id=1187100926188864302, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027207311471104, language=EN, label=null, caption=null, figureFileSmall=tEkVCcJTSngmuTyvlOYF9w==, figureFileBig=JPA3rrU27keTfIG01iY5VQ==, tableContent=null), ArticleFig(id=1187100926268556080, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027207311471104, language=CN, label=图1, caption=
开裂钢轨的实物形貌, figureFileSmall=tEkVCcJTSngmuTyvlOYF9w==, figureFileBig=JPA3rrU27keTfIG01iY5VQ==, tableContent=null), ArticleFig(id=1187100926314693429, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027207311471104, language=EN, label=null, caption=null, figureFileSmall=FQ7YfrWRSOWD/b9/W5XT2A==, figureFileBig=wfFiR5D/3apu3HFVnIbBNA==, tableContent=null), ArticleFig(id=1187100926377607991, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027207311471104, language=CN, label=图2, caption=
扫描电镜断口形貌, figureFileSmall=FQ7YfrWRSOWD/b9/W5XT2A==, figureFileBig=wfFiR5D/3apu3HFVnIbBNA==, tableContent=null), ArticleFig(id=1187100926448911161, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027207311471104, language=EN, label=null, caption=null, figureFileSmall=2Vf9xZ1pdeMQQNTcERvRkQ==, figureFileBig=ppz6Lp6WTgEiW4HlkkAvUA==, tableContent=null), ArticleFig(id=1187100926516020029, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027207311471104, language=CN, label=图3, caption=
断裂源部位的金相观察结果, figureFileSmall=2Vf9xZ1pdeMQQNTcERvRkQ==, figureFileBig=ppz6Lp6WTgEiW4HlkkAvUA==, tableContent=null), ArticleFig(id=1187100926595711807, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027207311471104, language=EN, label=null, caption=null, figureFileSmall=C4H6XCqnGQ50VyOeWkd1KQ==, figureFileBig=467FbuW+AQvL4I592QFiRg==, tableContent=null), ArticleFig(id=1187100926675403585, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027207311471104, language=CN, label=图4, caption=
断裂源部位金相检验面扫描电镜及能谱分析, figureFileSmall=C4H6XCqnGQ50VyOeWkd1KQ==, figureFileBig=467FbuW+AQvL4I592QFiRg==, tableContent=null), ArticleFig(id=1187100926734123845, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027207311471104, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | C | Si | Mn | P | S | Cr | V | Al |
| 实测 | 0.72 | 0.35 | 0.93 | 0.011 | 0.006 | 0.018 | 0.002 | 0.002 |
| 标准 | 0.65~0.76 | 0.15~0.58 | 0.70~1.20 | ≤0.03 | ≤0.025 | ≤0.15 | ≤0.03 | ≤0.01 |
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开裂钢轨的化学成分(质量分数) %
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| 项目 | C | Si | Mn | P | S | Cr | V | Al |
| 实测 | 0.72 | 0.35 | 0.93 | 0.011 | 0.006 | 0.018 | 0.002 | 0.002 |
| 标准 | 0.65~0.76 | 0.15~0.58 | 0.70~1.20 | ≤0.03 | ≤0.025 | ≤0.15 | ≤0.03 | ≤0.01 |
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| 项目 | Mo | Ni | Cu | Sn | Sb | Ti | Nb | Cu+10Sn | Cr+Mo+Ni+Cu |
| 实测 | 0.002 | 0.016 | 0.019 | 0.002 | 0 | 0.001 7 | 0.001 | 0.039 | 0.055 |
| 标准 | 0.02 | 0.10 | 0.15 | 0.03 | 0.02 | 0.025 | 0.01 | 0.35 | 0.35 |
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残余元素上限(质量分数) %
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| 项目 | Mo | Ni | Cu | Sn | Sb | Ti | Nb | Cu+10Sn | Cr+Mo+Ni+Cu |
| 实测 | 0.002 | 0.016 | 0.019 | 0.002 | 0 | 0.001 7 | 0.001 | 0.039 | 0.055 |
| 标准 | 0.02 | 0.10 | 0.15 | 0.03 | 0.02 | 0.025 | 0.01 | 0.35 | 0.35 |
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