复合场对铝硅合金半连续铸锭组织和性能的影响
详细信息 查看官网全文
- 英文论文题名：Effects of compound fields on the structure and mechanical property of Al-Si alloys during DC casting
- 论文作者：张宇博 ; 李廷举 ; 接金川 ; 卢一平 ; 王同敏
- 英文论文作者：ZHANG Yubo ; LI Tingju ; JIE Jinchuan ; LU Yiping ; WANG Tongmin ; School of materials science and engineering ; Dalian university of technology
- 年：2016
- 作者机构：大连理工大学材料科学与工程学院;
- 论文关键词：铝硅合金 ; 超声场 ; 中频磁场 ; 微观组织 ; 力学性能
- 英文论文关键词：Aluminum alloys ; Electromagnetic field ; Ultrasonic field ; Solidification microstructure ; Mechanical property
- 会议召开时间：2016-08-15
- 会议录名称：第三届全国电磁冶金与强磁场材料科学会议学术论文集
- 语种：中文
- 分类号：TG292
- 学会代码：ZGJS
- 会议名称：第三届全国电磁冶金与强磁场材料科学会议
- 会议地点：中国河南焦作
- 主办单位：中国金属学会电磁冶金与强磁场材料科学分会
- 学会名称：中国金属学会
- 页数：5
- 文件大小：1648k
- 原文格式：O
- 会议级别：全国
摘要
立式水冷半连续铸造法是最常用的铝合金铸锭制备方法,为得到均匀细小的等轴晶组织,通常需要在半连铸过程中进行细化处理。本文中,超声场和中频磁场作为复合场同时作用于铝硅合金的半连续铸造过程中,制得直径160 mm、组织均匀细化的铝合金圆锭。超声场的空化作用在铝熔体内产生了很多有过冷度的微区,产生大量晶核。中频磁场增大了超声空化的作用区域,超声空化产生的初生晶核被超声声流和中频磁场引起的强制对流均匀地分散到半连续铸锭的熔体区。在晶粒长大过程中,复合场产生的强制对流会引起树枝晶在枝晶臂根部发生重熔或熔断,进一步达到细化晶粒的目的。复合场作用下,铸锭平均晶粒尺寸由l mm降为150 um,共晶硅的形貌由粗大针片状变为细小块状,铸锭抗拉强度增加16.9%,延伸率增加37.6%。
Direct chill(DC) casting is widely used for the Al alloy production.In this study,the intermediate frequency electromagnetic(IFEM) field and power ultrasonic(US) field were applied during DC casting of Al-8%Si alloy.The effects of different physical fields on solidification micro structure and mechanical properties were studied.The results show that when the compound fields were applied,the EM field can increase the ultrasonic treated region,while the US field can enhance the refinement effect of IFEM field.Owing to the advantages of both IFEM and US fields,the micro structure is fine and uniform,leading to a remarkable enhancement of the mechanical properties.The mechanisms of interaction between the IFEM field and the US field were also discussed.
Direct chill(DC) casting is widely used for the Al alloy production.In this study,the intermediate frequency electromagnetic(IFEM) field and power ultrasonic(US) field were applied during DC casting of Al-8%Si alloy.The effects of different physical fields on solidification micro structure and mechanical properties were studied.The results show that when the compound fields were applied,the EM field can increase the ultrasonic treated region,while the US field can enhance the refinement effect of IFEM field.Owing to the advantages of both IFEM and US fields,the micro structure is fine and uniform,leading to a remarkable enhancement of the mechanical properties.The mechanisms of interaction between the IFEM field and the US field were also discussed.
引文
[1]田荣璋.铸造铝合金.长沙:中南大学出版社,2006
[2]肖亚庆.铝加工技术实用手册.冶金工业出版社,2005
[3]W.Kurz,D.J.Fisher著.李建国.胡侨丹译.凝固原理[M].北京:高等教育出版社,2010
[4]张景祥,张忠华.变形铝合金晶粒细化的进展.轻合金加工技术.2000,28(7):1-4
[5]T.M.Wang,Z.N.Chen,EW.Fu,J.Xu,Y Fu,T.J.Li.Grain Refining Potency of Al-B Master Alloy on Pure Aluminum.Scripta Material.2011,64(12):1121-1124
[6]C.Vives.Electromagnetic Refining of Aluminum Alloys by the Crem Process:Part I.Working Principle and Metallurgical Results.Metallurgical Transactions B.1989,20(5):623-629
[7]G.I.Eskin.Ultrasonic Treatment of Light Alloy Melts.1997
[2]肖亚庆.铝加工技术实用手册.冶金工业出版社,2005
[3]W.Kurz,D.J.Fisher著.李建国.胡侨丹译.凝固原理[M].北京:高等教育出版社,2010
[4]张景祥,张忠华.变形铝合金晶粒细化的进展.轻合金加工技术.2000,28(7):1-4
[5]T.M.Wang,Z.N.Chen,EW.Fu,J.Xu,Y Fu,T.J.Li.Grain Refining Potency of Al-B Master Alloy on Pure Aluminum.Scripta Material.2011,64(12):1121-1124
[6]C.Vives.Electromagnetic Refining of Aluminum Alloys by the Crem Process:Part I.Working Principle and Metallurgical Results.Metallurgical Transactions B.1989,20(5):623-629
[7]G.I.Eskin.Ultrasonic Treatment of Light Alloy Melts.1997