Article(id=1208718172384006331, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1208718167589916789, articleNumber=null, orderNo=null, doi=10.19710/J.cnki.1003-8817.20240102, 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=1766110469193, onlineDateStr=2025-12-19, pubDate=1718812800000, pubDateStr=2024-06-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1766110469193, onlineIssueDateStr=2025-12-19, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1766110469193, creator=13701087609, updateTime=1766110469193, 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=1, endPage=5, ext={EN=ArticleExt(id=1208718173763932363, articleId=1208718172384006331, tenantId=1146029695717560320, journalId=1189873562199433220, language=EN, title=Research on the Properties of the New Steel for Automotive Covering Parts, columnId=null, journalTitle=Automobile Technology & Material, columnName=null, runingTitle=null, highlight=null, articleAbstract=
As a new type of ultra-fine grained high-strength steel, UF340 has the potential to replace HC180BD in automotive exterior panels. This paper investigated its mechanical properties and formability. The results indicate that UF340 and HC180BD have similar mechanical properties in terms of plasticity, processing hardening index, and anisotropy, but UF340 does not exhibit significant bake hardening properties. The formability of the two materials is similar. There is certain difference between the forming limit curve calculated by the Keeler model and the forming test results. The forming limit diagram obtained by linear segment fitting data has a higher degree of agreement with the experiment, the forming limit curve obtained by this method can provide a reference on the forming application of new materials.
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UF340作为一种新型超细晶高强钢,在汽车外覆盖件的应用上具有替代HC180BD的潜力,研究了UF340力学性能和成形性能。结果表明,在塑性、加工硬化指数和各向异性方面,UF340与HC180BD具有相似的力学性能,与HC180BD相比UF340没有明显的烘烤硬化性,2种材料的成形性能基本一致。通过Keeler模型计算获得UF340的成形极限曲线与成形试验结果存在一定差异,采用线性分段拟合方式获得的成形极限图与试验结果吻合度更高,采用该方法获得的成形极限曲线可为新材料的成形应用提供参考。
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张钧萍(1988—),男,高级工程师,硕士学位,研究方向为轻量化材料性能测评及工艺研究。
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| 元素 | C | Si | Mn | P | S | Nb |
| UF340 | 0.004 | 0.008 | 0.171 | 0.031 | 0.006 | 0.042 |
| HC180BD | 0.002 | 0.006 | 0.210 | 0.029 | 0.011 | 0.005 |
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UF340板材化学成分(质量分数) %
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| 元素 | C | Si | Mn | P | S | Nb |
| UF340 | 0.004 | 0.008 | 0.171 | 0.031 | 0.006 | 0.042 |
| HC180BD | 0.002 | 0.006 | 0.210 | 0.029 | 0.011 | 0.005 |
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| 材料牌号 | 取样方向/(°) | 屈服强度/MPa | 抗拉强度/MPa | 断后伸长率/% | n值 | r值 |
| UF340 | 0 | 225 | 377 | 37.5 | 0.22 | 1.65 |
| 45 | 227 | 363 | 38.0 | 0.21 | 2.10 |
| 90 | 228 | 362 | 38.5 | 0.21 | 2.05 |
| HC180BD | 90 | 191 | 302 | 40.5 | 0.21 | 2.05 |
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2种板材的力学性能参数
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| 材料牌号 | 取样方向/(°) | 屈服强度/MPa | 抗拉强度/MPa | 断后伸长率/% | n值 | r值 |
| UF340 | 0 | 225 | 377 | 37.5 | 0.22 | 1.65 |
| 45 | 227 | 363 | 38.0 | 0.21 | 2.10 |
| 90 | 228 | 362 | 38.5 | 0.21 | 2.05 |
| HC180BD | 90 | 191 | 302 | 40.5 | 0.21 | 2.05 |
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| 牌号 | 屈服 强度 | 2%变形 强度 | 烘烤后的 屈服强度 | 烘烤 硬化值 |
| UF340 | 228 | 270 | 274 | 4 |
HC180 BD | 191 | 220 | 264 | 44 |
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2种板材的烘烤硬化性能 MPa
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| 牌号 | 屈服 强度 | 2%变形 强度 | 烘烤后的 屈服强度 | 烘烤 硬化值 |
| UF340 | 228 | 270 | 274 | 4 |
HC180 BD | 191 | 220 | 264 | 44 |
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