Article(id=1199809971501233002, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1199809968984650567, articleNumber=1009-5438(2022)05-0070-03, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1638288000000, receivedDateStr=2021-12-01, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1763986588597, onlineDateStr=2025-11-24, pubDate=1666627200000, pubDateStr=2022-10-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763986588597, onlineIssueDateStr=2025-11-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763986588597, creator=13701087609, updateTime=1763986588597, 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=70, endPage=72, ext={EN=ArticleExt(id=1199809971731919729, articleId=1199809971501233002, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Effects of Residual Stress for Heat-treated Rail on Fatigue Crack Growth Rate, columnId=1187340471245357385, journalTitle=Science & Technology of Baotou Steel, columnName=Quality of Variety and Experiment and Research, runingTitle=null, highlight=null, articleAbstract=

The effect of residual stress for rail on its fatigue performance is great. In this paper, the influences of different residual stress values on fatigue crack growth rate for U75V heat-treated rail are studied with tempering test and metallographic analysis method. The influences of different tempering times on the residual tension of rail are analyzed with the tempering test. It is concluded that the residual stress gradually decreases with increase of tempering time; the crack growth path at tip of fatigue crack is analyzed by testing the metallographic structure of rail treated with tempering process and observing the metallographic structure of rail with different tempering times, the influences of different tempering times on fatigue crack growth rate are analyzed according to the mode and length of crack growth; the residual stress and fatigue crack growth rate of rail can be effectively reduced so that the anti-fatigue performance of rail can be improved through tempering process control.

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钢轨残余应力对其疲劳性能影响较大,文章采用回火试验和金相分析方法,研究了不同残余应力值对U75V热处理钢轨疲劳裂纹扩展速率的影响。通过回火试验,分析不同回火时长对钢轨残余应力的影响,得出随着回火时间的增加残余应力逐渐减小;通过对回火工艺处理后的钢轨进行金相组织检测,观察不同回火时长的钢轨金相组织,分析疲劳裂纹尖端处裂纹扩展路径,根据裂纹扩展的方式与长度来分析不同回火时长对疲劳裂纹扩展速率的影响;通过回火工艺控制,可有效降低钢轨残余应力,进而有效地降低钢轨裂纹扩展速率,提高钢轨抗疲劳性能。

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苏 航(1988-),男,内蒙古包头市人,硕士,高级工程师,现从事钢轨新产品研发相关工作。

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苏 航(1988-),男,内蒙古包头市人,硕士,高级工程师,现从事钢轨新产品研发相关工作。

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位置	微应变/με	残余应力/MPa	微应变/με	残余应力/MPa	微应变/με	残余应力/MPa
轨头	-842	174.3	-938	194.2	-984	203.7
轨腰	972	-201.2	876	-181.3	947	-196.0
轨底	-1 122	232.3	-1 038	214.9	-1 155	239.1

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U75V热处理钢轨残余应力

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位置	微应变/με	残余应力/MPa	微应变/με	残余应力/MPa	微应变/με	残余应力/MPa
轨头	-842	174.3	-938	194.2	-984	203.7
轨腰	972	-201.2	876	-181.3	947	-196.0
轨底	-1 122	232.3	-1 038	214.9	-1 155	239.1

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钢轨编号	回火时间 /h	残余应力/MPa
		轨头	轨腰	轨底
1		230.2	-203.1	237.7
2	2	194.2	-169.1	232.3
3	4	174.3	-147.6	190.0
4	8	149.7	-147.2	172.1

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钢轨回火残余应力

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钢轨编号	回火时间 /h	残余应力/MPa
		轨头	轨腰	轨底
1		230.2	-203.1	237.7
2	2	194.2	-169.1	232.3
3	4	174.3	-147.6	190.0
4	8	149.7	-147.2	172.1

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