Article(id=1209856842725978858, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1209856841199252183, articleNumber=null, orderNo=null, doi=10.19710/J.cnki.1003-8817.20220233, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=null, receivedDateStr=null, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1766381949359, onlineDateStr=2025-12-22, pubDate=1710864000000, pubDateStr=2024-03-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1766381949359, onlineIssueDateStr=2025-12-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1766381949359, creator=13701087609, updateTime=1766381949359, updator=13701087609, issue=Issue{id=1209856841199252183, tenantId=1146029695717560320, journalId=1189873562199433220, year='2024', volume='', issue='3', pageStart='1', pageEnd='72', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1766381948995, creator=13701087609, updateTime=1766381948995, updator=13701087609, preIssue=null, nextIssue=null, ext=null, issueFiles=null}, startPage=47, endPage=51, ext={EN=ArticleExt(id=1209856844265288455, articleId=1209856842725978858, tenantId=1146029695717560320, journalId=1189873562199433220, language=EN, title=Fracture Analysis and Rectification of Trunk Lid Torsion Bar Spring, columnId=null, journalTitle=Automobile Technology & Material, columnName=null, runingTitle=null, highlight=null, articleAbstract=
In order to determine the fracture mechanism and cause of the trunk lid torsion bar spring, the fracture morphology, composition, size, material strength, microstructure and residual stress were tested, and a comprehensive analysis was conducted in combination with background information. The results indicate that the torsion bar spring of the trunk lid experienced high-strength steel delayed cracking at the concentrated bending stress caused by high material strength, insufficient tempering, and high residual stress. Based on the cause of cracking, improvements were made from two aspects: controlling the strength of raw materials and optimizing the stress relief tempering process to reduce residual stress, and ultimately the delayed cracking failure of the luggage torsion bar spring was effectively solved.
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闵良(1972—),男,工程师,硕士学位,研究方向为整车材料开发与质量管控。
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闵良(1972—),男,工程师,硕士学位,研究方向为整车材料开发与质量管控。
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闵良(1972—),男,工程师,硕士学位,研究方向为整车材料开发与质量管控。
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扭杆弹簧外观及断裂位置, figureFileSmall=dyrreoItR5Zi1rQQ6CT+7g==, figureFileBig=BRi9IS8y/X7mDs4LPO1D1g==, tableContent=null), ArticleFig(id=1209873372075389519, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1209856842725978858, language=EN, label=null, caption=null, figureFileSmall=0CriNpdEOxuhCB08EJijCg==, figureFileBig=rjrNjiHW3GlyuxX5j8mBkg==, tableContent=null), ArticleFig(id=1209873372163469905, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1209856842725978858, language=CN, label=图2, caption=
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断口电镜形貌, figureFileSmall=aaTKc++uw6XIJZw22F/Mdw==, figureFileBig=rL5AfOYtdPaaRz0pLEX3ag==, tableContent=null), ArticleFig(id=1209873372398350940, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1209856842725978858, language=EN, label=null, caption=null, figureFileSmall=hz482z7v0bIqwlhEHBJUKw==, figureFileBig=5v9/Wyn44UET4wTbU4CtTQ==, tableContent=null), ArticleFig(id=1209873372486431327, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1209856842725978858, language=CN, label=图4, caption=
断口能谱检测结果, figureFileSmall=hz482z7v0bIqwlhEHBJUKw==, figureFileBig=5v9/Wyn44UET4wTbU4CtTQ==, tableContent=null), ArticleFig(id=1209873372587094629, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1209856842725978858, language=EN, label=null, caption=null, figureFileSmall=xfO5EMvmGxwOtR58k7q5HQ==, figureFileBig=af0nRKE0opMgYXJbY4BmVQ==, tableContent=null), ArticleFig(id=1209873372666786407, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1209856842725978858, language=CN, label=图5, caption=
失效零件折弯半径检测结果, figureFileSmall=xfO5EMvmGxwOtR58k7q5HQ==, figureFileBig=af0nRKE0opMgYXJbY4BmVQ==, tableContent=null), ArticleFig(id=1209873372733895273, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1209856842725978858, language=EN, label=null, caption=null, figureFileSmall=5ZPrwwmCAibjnH3OXNDpZg==, figureFileBig=T9v8YyeLe5VbIoO4735Atg==, tableContent=null), ArticleFig(id=1209873372801004140, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1209856842725978858, language=CN, label=图6, caption=
金相检测结果, figureFileSmall=5ZPrwwmCAibjnH3OXNDpZg==, figureFileBig=T9v8YyeLe5VbIoO4735Atg==, tableContent=null), ArticleFig(id=1209873372868113007, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1209856842725978858, language=EN, label=null, caption=null, figureFileSmall=8ONw0PVxuk68EJD5Uhr4vw==, figureFileBig=dy+b+CO9/3JX9Ya1ySj6Jg==, tableContent=null), ArticleFig(id=1209873372947804786, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1209856842725978858, language=CN, label=图7, caption=
电泳前已开裂扭杆的断口, figureFileSmall=8ONw0PVxuk68EJD5Uhr4vw==, figureFileBig=dy+b+CO9/3JX9Ya1ySj6Jg==, tableContent=null), ArticleFig(id=1209873373035885172, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1209856842725978858, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 元素 | C | Si | Mn | P | S | Cr | Cu |
| 要求 | 0.50~0.60 | 1.20~1.60 | 0.50~0.90 | ≤0.030 | ≤0.030 | 0.50~0.80 | ≤0.20 |
| 结果 | 0.52 | 1.49 | 0.74 | 0.017 | 0.020 | 0.66 | 0.001 |
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成分检测结果(质量分数) %
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| 元素 | C | Si | Mn | P | S | Cr | Cu |
| 要求 | 0.50~0.60 | 1.20~1.60 | 0.50~0.90 | ≤0.030 | ≤0.030 | 0.50~0.80 | ≤0.20 |
| 结果 | 0.52 | 1.49 | 0.74 | 0.017 | 0.020 | 0.66 | 0.001 |
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| 机械性能 | 要求 | 测试结果 |
| 1 | 2 | 3 |
| 抗拉强度/MPa | 1 740~1 890 | 1 896 | 1 884 | 1 881 |
| 断面收缩率/% | ≥40 | 46 | 48 | 47 |
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机械性能检测结果
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| 机械性能 | 要求 | 测试结果 |
| 1 | 2 | 3 |
| 抗拉强度/MPa | 1 740~1 890 | 1 896 | 1 884 | 1 881 |
| 断面收缩率/% | ≥40 | 46 | 48 | 47 |
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| 产品 | 残余应力 |
| 失效件 | 303 | 336 | 357 |
| 其他项目的产品 | 175 | 160 | 180 |
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残余应力检测结果 MPa
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| 产品 | 残余应力 |
| 失效件 | 303 | 336 | 357 |
| 其他项目的产品 | 175 | 160 | 180 |
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