Article(id=1208718168219062390, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1208718167589916789, articleNumber=null, orderNo=null, doi=10.19710/J.cnki.1003-8817.20240116, 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=1766110468201, onlineDateStr=2025-12-19, pubDate=1718812800000, pubDateStr=2024-06-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1766110468201, onlineIssueDateStr=2025-12-19, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1766110468201, creator=13701087609, updateTime=1766110468201, updator=13701087609, issue=Issue{id=1208718167589916789, tenantId=1146029695717560320, journalId=1189873562199433220, year='2024', volume='', issue='6', 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=1766110468050, creator=13701087609, updateTime=1766110468050, updator=13701087609, preIssue=null, nextIssue=null, ext=null, issueFiles=null}, startPage=11, endPage=16, ext={EN=ArticleExt(id=1208718169376690296, articleId=1208718168219062390, tenantId=1146029695717560320, journalId=1189873562199433220, language=EN, title=Analysis and Rectification of Fracture Failure of Hollow Stabilizer Bar Parts in Automobile, columnId=null, journalTitle=Automobile Technology & Material, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Failure analysis of the 34MnB5 hollow stabilizer bar fracture occurred in the road test of a mass production vehicle was carried out using laser confocal microscopy, scanning electron microscope and other equipment. It was confirmed that the insufficient shot blasting process time and the existence of axial original cracks caused early fatigue failure and fracture of the stabilizer bar. In order to further clarify the root cause of the failure and fracture, this article investigated and analyzed the manufacturing process of the stabilizer bar, determined that the main cause for the fracture of the stabilizer bar was insufficient shot blasting time, thus evaluated the subsequent impact of this fracture failure accident. Finally, the article identified the direction of rectification for the risk points during the investigation process, and proposed optimization measures to further prevent the occurrence of such problems.
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通过激光共聚焦显微镜、扫描电镜等设备对某一量产车路试中发生的34MnB5空心稳定杆断裂问题进行失效分析,确认抛丸工艺时间不足及存在轴向原始裂纹是造成稳定杆发生早期疲劳失效断裂的原因,为进一步明确失效断裂的根本原因,针对稳定杆的制造工艺进行排查和原因分析,判断抛丸时间不足是导致稳定杆断裂的主要原因,由此判断该次断裂失效带来的后续影响,最后针对排查过程中已确认的风险点,识别整改方向并提出优化措施,进一步防止问题发生。
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祁学军(1978—),男,高级工程师,硕士学位,研究方向为金属材料及轻量化。
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祁学军(1978—),男,高级工程师,硕士学位,研究方向为金属材料及轻量化。
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1 岚图汽车科技有限公司, 武汉 430051)])])], keywords=[Keyword(id=1208739313110609926, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, language=EN, orderNo=1, keyword=Hollow stabilizer bar), Keyword(id=1208739313207078925, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, language=EN, orderNo=2, keyword=Fatigue failure), Keyword(id=1208739313299353615, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, language=EN, orderNo=3, keyword=Blasting), Keyword(id=1208739313483902994, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, language=EN, orderNo=4, keyword=Residual stress), Keyword(id=1208739313618120726, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, language=CN, orderNo=1, keyword=空心稳定杆), Keyword(id=1208739313702006809, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, language=CN, orderNo=2, keyword=疲劳失效), Keyword(id=1208739313794281502, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, language=CN, orderNo=3, keyword=抛丸), Keyword(id=1208739313878167584, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, language=CN, orderNo=4, keyword=残余应力)], refs=[Reference(id=1208739319095881891, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, doi=null, pmid=null, pmcid=null, year=2005, volume=27, issue=5, pageStart=592, pageEnd=594, url=null, language=null, rfNumber=[1], rfOrder=0, authorNames=宋健, 邢如飞, journalName=汽车工程, refType=null, unstructuredReference=宋健, 邢如飞. 带橡胶套的稳定杆有限元分析[J].
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2008., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1208739311449666469, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, xref=1, ext=[AuthorCompanyExt(id=1208739311470637990, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, companyId=1208739311449666469, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1 岚图汽车科技有限公司, 武汉 430051)]), AuthorCompany(id=1208739311546135468, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, xref=2, ext=[AuthorCompanyExt(id=1208739311554524076, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, companyId=1208739311546135468, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 Da, an Automobile Testing Co., Ltd., Wuhan 430051), AuthorCompanyExt(id=1208739311558718381, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, companyId=1208739311546135468, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 达安汽车检测有限公司, 武汉 430051)])], figs=[ArticleFig(id=1208739314108854309, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, language=EN, label=null, caption=null, figureFileSmall=0IUlpGPR8h+OBEns8sBjUA==, figureFileBig=Z2Xm/43wvf4mkE/pLydw8Q==, tableContent=null), ArticleFig(id=1208739314171768874, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1208718168219062390, language=CN, label=图1, caption=
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| C | Si | Mn | P | S | Ni | Cr | Ti | B | Nb |
| 0.36 | 0.24 | 1.37 | 0.016 | <0.008* | <0.009* | 0.14 | 0.031 | 0.0 024 | <0.02* |
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元素含量检测结果(质量分数) %
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| C | Si | Mn | P | S | Ni | Cr | Ti | B | Nb |
| 0.36 | 0.24 | 1.37 | 0.016 | <0.008* | <0.009* | 0.14 | 0.031 | 0.0 024 | <0.02* |
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| 测试点 | 1 | 2 | 3 | 平均值 |
| 要求 | 43~50 HRC或423~513 HV10 |
| 硬度/HV10 | 457 | 440 | 454 | 450.3 |
| 硬度/HRC | 45.9 | 44.5 | 45.7 | 45.4 |
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维氏硬度(HV10)试验结果
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| 测试点 | 1 | 2 | 3 | 平均值 |
| 要求 | 43~50 HRC或423~513 HV10 |
| 硬度/HV10 | 457 | 440 | 454 | 450.3 |
| 硬度/HRC | 45.9 | 44.5 | 45.7 | 45.4 |
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| 零件 | 深度/μm | 残余应力/MPa |
失效件(行驶里程 1.3×104 km) | 0 | -129 |
| 100 | -234 |
| 完好件 | 0 | -388 |
| 100 | -674 |
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稳定杆残余应力测试对比结果
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| 零件 | 深度/μm | 残余应力/MPa |
失效件(行驶里程 1.3×104 km) | 0 | -129 |
| 100 | -234 |
| 完好件 | 0 | -388 |
| 100 | -674 |
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| 零件 | 零件缺陷状态 | 回火/抛丸工艺参数 | 疲劳台架 试验结论 | 验证后 实物 |
| 1# | 材料无缺陷 | 350 ℃回 火,抛丸 2 min | 86 740次 发生断裂 (对应行驶里程 8×104 km左右) | 如图16 所示
|
| 2# | 材料有缺陷 0.2 mm ×0.5 mm× 25 mm | 350 ℃回火,抛丸4 min | 300 000次未断裂 (对应行驶里程 3×105 km左右) | 如图17 所示
|
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不同状态稳定杆零件疲劳台架模拟试验结果
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| 零件 | 零件缺陷状态 | 回火/抛丸工艺参数 | 疲劳台架 试验结论 | 验证后 实物 |
| 1# | 材料无缺陷 | 350 ℃回 火,抛丸 2 min | 86 740次 发生断裂 (对应行驶里程 8×104 km左右) | 如图16 所示
|
| 2# | 材料有缺陷 0.2 mm ×0.5 mm× 25 mm | 350 ℃回火,抛丸4 min | 300 000次未断裂 (对应行驶里程 3×105 km左右) | 如图17 所示
|
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| 工艺过程识别出的风险点 | 整改方向 | 永久措施 |
| 回火工序导致零件硬度变化 | 取消返修的回火作业方式 | 通过设计抛丸机吊具,达到抛丸去除涂层目的,从而规避350 ℃回火 |
| 残余应力不足 | 锁定返修抛丸道序作业方式 | 通过修改抛丸设备程序,对抛丸时间进行下限锁定,使抛丸时间在4 min以下无法调节 |
| 零件的原始缺陷 | 增加探伤作业 | 一级供应商在工艺流程抛丸后增加一道表面探伤工艺,二级供应商涡流探伤中探伤孔从1.0提高到0.8,增益增加2 dB |
| 零件强化不足 | 优化抛丸工艺参数 | 弧高由0.3~0.5 ARC提升至0.33~0.5 ARC[5] |
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整改方向及措施
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| 工艺过程识别出的风险点 | 整改方向 | 永久措施 |
| 回火工序导致零件硬度变化 | 取消返修的回火作业方式 | 通过设计抛丸机吊具,达到抛丸去除涂层目的,从而规避350 ℃回火 |
| 残余应力不足 | 锁定返修抛丸道序作业方式 | 通过修改抛丸设备程序,对抛丸时间进行下限锁定,使抛丸时间在4 min以下无法调节 |
| 零件的原始缺陷 | 增加探伤作业 | 一级供应商在工艺流程抛丸后增加一道表面探伤工艺,二级供应商涡流探伤中探伤孔从1.0提高到0.8,增益增加2 dB |
| 零件强化不足 | 优化抛丸工艺参数 | 弧高由0.3~0.5 ARC提升至0.33~0.5 ARC[5] |
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