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金属学报  2013, Vol. 49 Issue (6): 757-762    DOI: 10.3724/SP.J.1037.2012.00723
  论文 本期目录 | 过刊浏览 |
Gasar连铸工艺制备藕状多孔Cu-Zn合金
李再久,金青林,杨天武,蒋业华,周荣
昆明理工大学材料科学与工程学院,昆明650093
FABRICATION OF LOTUS-TYPE POROUS Cu-Zn ALLOYS WITH THE GASAR CONTINUOUS CASTING PROCESS
LI Zaijiu, JIN Qinglin, YANG Tianwu, JIANG Yehua, ZHOU Rong
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093
引用本文:

李再久,金青林,杨天武,蒋业华,周荣. Gasar连铸工艺制备藕状多孔Cu-Zn合金[J]. 金属学报, 2013, 49(6): 757-762.
LI Zaijiu, JIN Qinglin, YANG Tianwu, JIANG Yehua, ZHOU Rong. FABRICATION OF LOTUS-TYPE POROUS Cu-Zn ALLOYS WITH THE GASAR CONTINUOUS CASTING PROCESS[J]. Acta Metall Sin, 2013, 49(6): 757-762.

全文: PDF(2076 KB)  
摘要: 

利用自行研制的Gasar连铸装置,成功拉制出不同Zn含量的藕状多孔Cu-Zn合金试样,并研究了Zn含量和下拉速率对气孔结构的影响. 结果表明:在多孔Cu-2Zn合金中, 随下拉速率的增加, 孔隙率略有增大,而平均孔径逐渐减小. 随Zn含量的增加, 受糊状区增大的影响,气孔结构的规则性和均匀性变差, 气孔直径变大,而气孔率呈现先减小后增大的趋势.

关键词 Cu-Zn合金Gasar连铸工艺藕状结构糊状区    
Abstract

A continuous casting technique was developed to fabricate lotus-type porous alloys. Lotus-type porous Cu-xZn (x=2, 6, 10, mass fraction,%) alloys were successfully fabricated by using the continuous casting technique under a hydrogen gas pressure of 0.6 MPa at various transference velocities. The effects of transference velocity and Zn contents on the porosity and pore diameter were investigated. It shows that, for the porous Cu-2Zn alloy, an increased transference velocity will result in a slightly increased porosity and a decreased average pore diameter. Addition of Zn into pure Cu, on the other hand, will result in an increased average pore diameter. Nevertheless, the pore morphology becomes more and more inhomogeneous with increasing Zn content, and the porosity tends to firstly decrease and then increase. Such tendencies are correlated with the Zn content and the corresponding width of the mushy zone.

Key wordsCu-Zn alloy    Gasar continuous casting process    lotus-type structure    mushy zone
收稿日期: 2012-12-07     
基金资助:

国家自然科学基金委员会--云南省人民政府联合基金重点项目u0837603和国家自然科学基金项目 51164018 资助

作者简介: 李再久, 男, 1984年生, 博士生

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