Article(id=1154021846405075343, tenantId=1146029695717560320, journalId=1146120084050784272, issueId=1154021839199260977, articleNumber=null, orderNo=null, doi=10.19562/j.chinasae.qcgc.2024.11.019, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1708272000000, receivedDateStr=2024-02-19, revisedDate=1714924800000, revisedDateStr=2024-05-06, acceptedDate=null, acceptedDateStr=null, onlineDate=1753069848871, onlineDateStr=2025-07-21, pubDate=1732464000000, pubDateStr=2024-11-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1753069848871, onlineIssueDateStr=2025-07-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1753069848871, creator=13701087609, updateTime=1753069848871, updator=13701087609, issue=Issue{id=1154021839199260977, tenantId=1146029695717560320, journalId=1146120084050784272, year='2024', volume='46', issue='11', pageStart='1937', pageEnd='2141', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=0, articleOrder=1, issueType=-1, specialIssue=null, createTime=1753069847153, creator=13701087609, updateTime=1753074308668, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1154040552191418639, tenantId=1146029695717560320, journalId=1146120084050784272, issueId=1154021839199260977, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1154040552191418640, tenantId=1146029695717560320, journalId=1146120084050784272, issueId=1154021839199260977, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=2133, endPage=2141, ext={EN=ArticleExt(id=1154021847273296272, articleId=1154021846405075343, tenantId=1146029695717560320, journalId=1146120084050784272, language=EN, title=A Predictive Study on Fracture Mode and Failure of Resistance Spot Welding of Hot-Formed Steel, columnId=1149809889280750125, journalTitle=Automotive Engineering, columnName=Selected Papers, runingTitle=null, highlight=null, articleAbstract=
The microstructure evolution and deformation behavior of resistance spot-welded joints of the two layer plates of 1500HS hot-formed steel sheets are studied in this paper. Through metallographic analysis,heat input distribution map,and alloy material property map,the microstructural changes at various positions relative to the weld nugget are analyzed. As the distance from the center area of the weld nugget increases,the microstructure of the welded joint can be divided into columnar crystal martensite,coarse-grained martensite,fine-grained martensite,ferrite-martensite dual phase microstructure and tempered martensite microstructure. Combined with Vickers hardness analysis,the differences in hardness under different organizational characteristics are clarified. The results show that the hardness decreases significantly in the ferrite martensite dual phase structure and tempered martensite region,which are the weak areas of the welding joints. Based on the experimental results of fusion size,maximum failure load,fracture surface macro-morphology,initial fracture location,and Vickers hardness of different plate thickness combinations,the influence of plate thickness and plate strength on the fracture mode,initial fracture location,and maximum failure load of the spot welded joints is explained.
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本文研究了1500HS热成形钢两层板电阻点焊接头的组织演变和变形行为。通过金相组织分析、热输入分布图以及合金材料性质图,分析了点焊接头在不同热输入量位置的组织演变。随着距焊核中心区域距离增加,点焊接头组织可以分为柱状晶马氏体、粗晶马氏体、细晶马氏体、铁素体-马氏体双相组织和回火马氏体组织。结合维氏硬度分析,明确了不同组织特征下的硬度差异,结果表明在铁素体-马氏体双相组织和回火马氏体区域的硬度下降较为明显,是焊点的薄弱区域。基于不同板厚组合下的熔核尺寸、最大失效载荷、断口宏观形貌、初始断裂位置和维氏硬度等实验结果,阐明了板材厚度和板材强度两类因素对于焊点断裂模式、初始断裂位置和最大失效载荷的影响规律。
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电阻点焊接头剪切力受力分析[14], figureFileSmall=2/qnbGsBTgXi9VkSuhO6SQ==, figureFileBig=YqcaJ7BBdG6e6WKEWD8plg==, tableContent=null), ArticleFig(id=1170312560059363779, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021846405075343, language=EN, label=null, caption=null, figureFileSmall=KzHjH2iF5yeGTQZHlkE/OA==, figureFileBig=8bTDIZ/x34w9ZzzI2X3x+Q==, tableContent=null), ArticleFig(id=1170312560122278340, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021846405075343, language=CN, label=图9, caption=
拔出断裂力学分析和拔出断裂机制横截面示意图[16], figureFileSmall=KzHjH2iF5yeGTQZHlkE/OA==, figureFileBig=8bTDIZ/x34w9ZzzI2X3x+Q==, tableContent=null), ArticleFig(id=1170312560189387205, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021846405075343, language=EN, label=null, caption=null, figureFileSmall=6IIigurHqFxcul19m1tprA==, figureFileBig=3XWpTM5/96A2iT3wlDCV5g==, tableContent=null), ArticleFig(id=1170312560256496070, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021846405075343, language=CN, label=图10, caption=
点焊接头断裂模式转变原理示意图[14], figureFileSmall=6IIigurHqFxcul19m1tprA==, figureFileBig=3XWpTM5/96A2iT3wlDCV5g==, tableContent=null), ArticleFig(id=1170312560373936583, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021846405075343, language=EN, label=null, caption=null, figureFileSmall=YxHqPOXexsH3zlGRCl0G2A==, figureFileBig=g3JewklVeJbgOYR+jbm1LA==, tableContent=null), ArticleFig(id=1170312560428462536, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021846405075343, language=CN, label=图11, caption=
焊点失效力随焊核直径变化曲线, figureFileSmall=YxHqPOXexsH3zlGRCl0G2A==, figureFileBig=g3JewklVeJbgOYR+jbm1LA==, tableContent=null), ArticleFig(id=1170312560495571401, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021846405075343, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 材料 | C | Mn | Si | Cr | B | Al |
| 1500HS | 0.23 | 1.20 | 0.40 | 0.25 | 0.003 | 0.04 |
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母材的化学成分(质量分数) (%)
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| 材料 | C | Mn | Si | Cr | B | Al |
| 1500HS | 0.23 | 1.20 | 0.40 | 0.25 | 0.003 | 0.04 |
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| 材料 | 屈服强度/MPa | 抗拉强度/MPa | 均匀 延伸率/% | 断后 延伸率/% |
| 1500HS | 1 122 | 1 530 | 6.1 | 9.3 |
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母材的力学性能
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| 材料 | 屈服强度/MPa | 抗拉强度/MPa | 均匀 延伸率/% | 断后 延伸率/% |
| 1500HS | 1 122 | 1 530 | 6.1 | 9.3 |
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| 试片编号 | 母材1 | 母材2 |
| 1# | 1500HS-1.2 mm | 1500HS-1.2 mm |
| 2# | 1500HS-1.4 mm | 1500HS-1.4 mm |
| 3# | 1500HS-1.6 mm | 1500HS-1.6 mm |
| 4# | 1500HS-1.2 mm | 1500HS-1.4 mm |
| 5# | 1500HS-1.2 mm | 1500HS-1.6 mm |
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两层板焊接试片组合
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| 试片编号 | 母材1 | 母材2 |
| 1# | 1500HS-1.2 mm | 1500HS-1.2 mm |
| 2# | 1500HS-1.4 mm | 1500HS-1.4 mm |
| 3# | 1500HS-1.6 mm | 1500HS-1.6 mm |
| 4# | 1500HS-1.2 mm | 1500HS-1.4 mm |
| 5# | 1500HS-1.2 mm | 1500HS-1.6 mm |
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| 电极 压力/kN | 焊接 电流/kA | 焊接 时间/ms | 脉冲 数量 | 维持 时间/ms | 电极 直径/mm |
| 2.5 | 8 | 300 | 1 | 200 | 16 |
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电阻点焊的焊接参数
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| 电极 压力/kN | 焊接 电流/kA | 焊接 时间/ms | 脉冲 数量 | 维持 时间/ms | 电极 直径/mm |
| 2.5 | 8 | 300 | 1 | 200 | 16 |
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| 编号 | 钢种 | D/mm | W/mm | t/mm | σHAZ/MPa | FPF计算值/kN | FPF实验值/kN | 计算误差 |
| 1# | 1500HS -1.2 mm | 1500HS -1.2 mm | 5.5±0.3 | 0.5 | 1.05 | 875 | 18.8 | 19.3 | 0.03 |
| 4# | 1500HS -1.2 mm | 1500HS -1.4 mm | 5.7±0.3 | 0.5 | 1.05 | 875 | 19.3 | 20.7 | 0.07 |
| 5# | 1500HS -1.2 mm | 1500HS -1.6 mm | 5.9±0.4 | 0.5 | 1.05 | 875 | 19.9 | 21.6 | 0.08 |
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拔出断裂失效力计算参数
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| 编号 | 钢种 | D/mm | W/mm | t/mm | σHAZ/MPa | FPF计算值/kN | FPF实验值/kN | 计算误差 |
| 1# | 1500HS -1.2 mm | 1500HS -1.2 mm | 5.5±0.3 | 0.5 | 1.05 | 875 | 18.8 | 19.3 | 0.03 |
| 4# | 1500HS -1.2 mm | 1500HS -1.4 mm | 5.7±0.3 | 0.5 | 1.05 | 875 | 19.3 | 20.7 | 0.07 |
| 5# | 1500HS -1.2 mm | 1500HS -1.6 mm | 5.9±0.4 | 0.5 | 1.05 | 875 | 19.9 | 21.6 | 0.08 |
), ArticleFig(id=1170312561376375251, tenantId=1146029695717560320, journalId=1146120084050784272, articleId=1154021846405075343, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 编号 | 钢种 | D/mm | σ焊核/MPa | τ焊核/MPa | P | FIF计算 值/kN | FIF实验 值/kN | 计算误差 |
| 2# | 1500HS -1.4 mm | 1500HS -1.4 mm | 6.2±0.4 | 1 122 | 673 | 1 | 20.3 | 21.8 | 0.07 |
| 3# | 1500HS -1.6 mm | 1500HS -1.6 mm | 6.5±0.5 | 1 122 | 673 | 1 | 22.3 | 25.3 | 0.12 |
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界面断裂失效力计算参数
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| 编号 | 钢种 | D/mm | σ焊核/MPa | τ焊核/MPa | P | FIF计算 值/kN | FIF实验 值/kN | 计算误差 |
| 2# | 1500HS -1.4 mm | 1500HS -1.4 mm | 6.2±0.4 | 1 122 | 673 | 1 | 20.3 | 21.8 | 0.07 |
| 3# | 1500HS -1.6 mm | 1500HS -1.6 mm | 6.5±0.5 | 1 122 | 673 | 1 | 22.3 | 25.3 | 0.12 |
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