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Homogenization treatment under different conditions were carried out for Al-Zn-Mg-(Cu) alloys applied to 3C products, and the end-quenching method and DSC measurement were adopted to investigate the effect of homogenization cooling rate on microstructure. It is found that the optimal homogenization regime is 470 ℃ for 2 hours plus 510 ℃ for 18 hours. Under these conditions, low-melting eutectic phases such as AlZnMg and MgZn₂ are completely eliminated, while the area fraction of refractory phases like AlFeSi and AlFeMnSi significantly decreases. During the homogenization cooling, MgZn₂ phase precipitates along grain boundaries when the cooling rate is lower than 11 ℃/s. With the cooling rate of 0.083-0.833 ℃/s, the MgZn₂ phase precipitates both at grain boundaries and inside grains, the initial precipitation temperature of MgZn₂ phase ranges from 417 ℃ to 451 ℃, and the termination temperature ranges from 311 ℃ to 355 ℃.

, authors=Jun LI¹, Guotong ZOU¹, Lingying YE¹, Keda JIANG², Shitong FAN², authorsList=Jun LI, Guotong ZOU, Lingying YE, Keda JIANG, Shitong FAN, authorCompany=null, correspAuthors=Lingying YE, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1314908011240448751, articleId=1314908008975524589, tenantId=1146029695717560320, journalId=1235980550691926019, language=CN, title=均匀化工艺对3C产品用Al-Zn-Mg-（Cu）合金微观组织演变的影响, columnId=1236276110049202322, journalTitle=矿冶工程杂志, columnName=材料, runingTitle=null, highlight=null, articleAbstract=

对3C产品用Al-Zn-Mg-（Cu）合金开展不同条件下的均匀化工艺研究，同时利用末端淬火法和DSC曲线测试法探究均匀化冷却速率对微观组织的影响。结果表明，Al-Zn-Mg-（Cu）合金的适宜双级均匀化制度为470 ℃/2 h+510 ℃/18 h，在此条件下AlZnMg和MgZn₂等低熔点共晶相可以完全消除，同时AlFeSi、AlFeMnSi等难熔相面积分数明显减小。Al-Zn-Mg-（Cu）合金在均匀化冷却过程中，冷却速率低于11 ℃/s时，MgZn₂相沿着晶界析出；冷却速率0.083~0.833 ℃/s时，MgZn₂相在晶界和晶粒内部同时析出，MgZn₂相的起始析出温度为417~451 ℃，终止析出温度为311~355 ℃。

, authors=李俊¹, 邹国童¹, 叶凌英¹, 姜科达², 范世通², authorsList=李俊, 邹国童, 叶凌英, 姜科达, 范世通, authorCompany=null, correspAuthors=叶凌英, authorNote=, correspAuthorsNote=, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=6mfHLzwsA/duXePrw7OfVA==, magXml=Hjfl2RyFUnXXL12nOjlnyA==, pdfUrl=null, pdf=/xJJbLVMcxGqtQpjd44JVw==, pdfFileSize=10194030, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=ZN+KEsriDvXLvhhCsRBxUw==, mapNumber=null, fund=null)}, authors=[Author(id=1314908012041560823, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1314908008975524589, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=203111065@csu.edu.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1314908012133835513, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1314908008975524589, authorId=1314908012041560823, language=EN, stringName=Jun LI, firstName=Jun, middleName=null, lastName=LI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=¹, address=^1.School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1314908012339356410, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1314908008975524589, authorId=1314908012041560823, language=CN, stringName=李俊, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=¹, address=^1．中南大学 材料科学与工程学院，湖南 长沙 410083, bio={"content":"

李俊（1998—），男，云南大理人，博士研究生，主要研究方向为高强铝合金性能调控。E-mail: 203111065@csu.edu.cn

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李俊（1998—），男，云南大理人，博士研究生，主要研究方向为高强铝合金性能调控。E-mail: 203111065@csu.edu.cn

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