Article(id=1195733617197494407, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1195733614798357446, articleNumber=null, orderNo=null, doi=10.19710/J.cnki.1003-8817.20240364, 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=1763014709995, onlineDateStr=2025-11-13, pubDate=1745078400000, pubDateStr=2025-04-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763014709995, onlineIssueDateStr=2025-11-13, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763014709995, creator=13701087609, updateTime=1763014709995, updator=13701087609, issue=Issue{id=1195733614798357446, tenantId=1146029695717560320, journalId=1189873562199433220, year='2025', volume='', issue='4', 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=1763014709424, creator=13701087609, updateTime=1763015213929, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1195735730925388785, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1195733614798357446, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1195735730925388786, tenantId=1146029695717560320, journalId=1189873562199433220, issueId=1195733614798357446, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=35, endPage=39, ext={EN=ArticleExt(id=1195733618405453964, articleId=1195733617197494407, tenantId=1146029695717560320, journalId=1189873562199433220, language=EN, title=Influence of High and Low Speed Switching Position on the Internal Porosity and Mechanical Properties of Magnesium Alloy Die-Casting Parts, columnId=1190284220686766583, journalTitle=Automobile Technology & Material, columnName=Original article, runingTitle=null, highlight=null, articleAbstract=
To improve the internal quality and mechanical properties of magnesium alloy die-casting parts, this paper studies the influence of high and low speed switching position on the internal porosity and mechanical properties of AE44 magnesium alloy die-casting parts. The results show that compared with the traditional position of the punch when the alloy liquid reaches the inner gate as the high and low speed switching position, advancing the high and low speed switching position can reduce the porosity inside the casting and improve its mechanical properties. However, advancing the high and low speed switching position too much can actually increase the porosity and decrease the mechanical properties. That is mainly because advancing the high and low speed switching position can reduce the melt temperature drop of magnesium alloy during the filling process, which is beneficial for improving the fluidity of magnesium alloy and the discharge of residual air in the mold cavity. If the high and low speed switching position is advanced too much, it will increase the turbulence level when the melt fills the mold cavity, entrain more gas, and improve the porosity of the casting.
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为提高镁合金压铸件的内部质量与力学性能,对比研究了高、低速切换位置对AE44镁合金压铸件内部孔隙率与力学性能的影响。结果表明:相比于传统将合金熔体达到内浇口时的冲头位置作为高、低速切换位置,将高、低速切换位置适当提前可降低铸件内部的孔隙率并提高力学性能,但高、低速切换位置提前过多会提高孔隙率、降低力学性能;这主要是由于将高、低速切换位置适当提前可减小镁合金在充型过程中熔体温度的降幅,有利于提高镁合金的流动性和模具型腔内残留空气的排出,而高、低速切换位置提前过多,会增加熔体填充型腔时的紊流程度,卷入更多的气体,提高铸件孔隙率。
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付彭怀(1980—),男,副研究员,博士学位,研究方向为镁/铝合金材料与铸造、增材制造技术。
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王嘉诚(1997—),男,博士研究生,研究方向为压铸镁/铝合金材料开发与成型技术。
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王嘉诚(1997—),男,博士研究生,研究方向为压铸镁/铝合金材料开发与成型技术。
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43(1): 88-91., articleTitle=真空度对真空压铸镁合金副车架品质的影响, refAbstract=null)], funds=[Fund(id=1195733835729121595, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195733617197494407, awardId=2021YFB3701000, language=CN, fundingSource=国家重点研发计划项目(2021YFB3701000), fundOrder=null, country=null), Fund(id=1195733835800424764, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195733617197494407, awardId=20241ZDYF020400, language=CN, fundingSource=宁波科技项目(20241ZDYF020400), fundOrder=null, country=null), Fund(id=1195733835863339325, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195733617197494407, awardId=U21A2048, language=CN, fundingSource=自然科学基金项目(U21A2048), fundOrder=null, country=null), Fund(id=1195733835917865278, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195733617197494407, awardId=51821001, language=CN, fundingSource=自然科学基金项目(51821001), fundOrder=null, country=null), Fund(id=1195733835980779839, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195733617197494407, awardId=21DZ1208200, language=CN, fundingSource=上海市科委重点项目(21DZ1208200), fundOrder=null, country=null), Fund(id=1195733836035305792, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195733617197494407, awardId=2020B010186001, language=CN, fundingSource=广东省重点领域研发计划(2020B010186001), fundOrder=null, country=null), Fund(id=1195733836106608961, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195733617197494407, awardId=2024310031003044, language=CN, fundingSource=上海市技术合同(2024310031003044), fundOrder=null, country=null), Fund(id=1195733836165329218, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195733617197494407, awardId=2022B1515120046, language=CN, fundingSource=广东省基础与应用基础研究基金(2022B1515120046), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1195733831052472569, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195733617197494407, xref=1, ext=[AuthorCompanyExt(id=1195733831065055482, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195733617197494407, companyId=1195733831052472569, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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样品A、B、C抗拉强度与断后伸长率散点图, figureFileSmall=7Ff3y7PwYxNWdyNKW4jtuQ==, figureFileBig=S1yWGFWrMXzDCY+XL1dtWA==, tableContent=null), ArticleFig(id=1195733835196444979, tenantId=1146029695717560320, journalId=1189873562199433220, articleId=1195733617197494407, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 编号 | 高低速切换位置 /mm | 高速速度 /m·s-1 | 铸造压力 /MPa |
| A | 900 | 6 | 55 |
| B | 920 | 6 | 55 |
| C | 950 | 6 | 55 |
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压铸工艺参数
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| 编号 | 高低速切换位置 /mm | 高速速度 /m·s-1 | 铸造压力 /MPa |
| A | 900 | 6 | 55 |
| B | 920 | 6 | 55 |
| C | 950 | 6 | 55 |
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| 元素 | Al | RE | Mn | Fe | Mg |
| 质量分数 | 3.97 | 3.89 | 0.32 | 0.04 | 余量 |
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合金成分(质量分数) %
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| 元素 | Al | RE | Mn | Fe | Mg |
| 质量分数 | 3.97 | 3.89 | 0.32 | 0.04 | 余量 |
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| 编号 | A | B | C |
| 孔隙率 | 0.392 | 0.154 | 0.182 |
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附铸试片孔隙率(体积百分数) %
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| 编号 | A | B | C |
| 孔隙率 | 0.392 | 0.154 | 0.182 |
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| 样品 | 位置 | 屈服强度/MPa | 抗拉强度/MPa | 断后伸长率/% |
| A | 1 | 137 | 216 | 9.0 |
| 2 | 136 | 215 | 8.5 |
| 3 | 128 | 205 | 6.5 |
| 4 | 127 | 200 | 5.5 |
| 平均 | 132 | 209 | 7.4 |
| B | 1 | 137 | 238 | 13.0 |
| 2 | 136 | 243 | 13.5 |
| 3 | 136 | 218 | 9.5 |
| 4 | 135 | 215 | 9.0 |
| 平均 | 136 | 229 | 11.3 |
| C | 1 | 136 | 229 | 11.5 |
| 2 | 136 | 228 | 11.5 |
| 3 | 134 | 217 | 9.0 |
| 4 | 129 | 206 | 6.5 |
| 平均 | 134 | 220 | 9.6 |
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附铸试片拉伸性能
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| 样品 | 位置 | 屈服强度/MPa | 抗拉强度/MPa | 断后伸长率/% |
| A | 1 | 137 | 216 | 9.0 |
| 2 | 136 | 215 | 8.5 |
| 3 | 128 | 205 | 6.5 |
| 4 | 127 | 200 | 5.5 |
| 平均 | 132 | 209 | 7.4 |
| B | 1 | 137 | 238 | 13.0 |
| 2 | 136 | 243 | 13.5 |
| 3 | 136 | 218 | 9.5 |
| 4 | 135 | 215 | 9.0 |
| 平均 | 136 | 229 | 11.3 |
| C | 1 | 136 | 229 | 11.5 |
| 2 | 136 | 228 | 11.5 |
| 3 | 134 | 217 | 9.0 |
| 4 | 129 | 206 | 6.5 |
| 平均 | 134 | 220 | 9.6 |
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