Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第26卷    第12期    总第213期    2016年12月

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文章编号:1004-0609(2016)-12-2537-09
单向压缩半固态铜合金的显微组织演变
肖 寒,陈泽邦,李 勇,卢德宏,周荣锋,周 荣

(昆明理工大学 材料科学与工程学院,昆明 650093)

摘 要: 利用Gleeble-1500热/力学模拟试验机,对采用应变诱导熔化激活法制备的ZCuSn10铜合金半固态及铸态坯料进行单向压缩实验。分析压缩变形条件对半固态ZCuSn10铜合金坯料显微组织的影响,并结合压缩后的显微组织对固液两相的流动规律进行分析。结果表明:SIMA法制备的半固态压缩试样变形抗力仅为常规铸态ZCuSn10铜合金压缩试样的一半。半固态试样压缩变形前液相率为19.4%,压缩变形后液相率为8.1%。半固态ZCuSn10铜合金在不同应变量、变形温度、应变速率下进行压缩实验,试样在过渡区域开始产生液固分离现象,并在中心区域出现液固完全分离现象。变形量越大,半固态ZCuSn10铜合金压缩试样中心部位的液相越少。随着温度的升高,半固态ZCuSn10铜合金压缩试样的端部、过渡区域、心部的液相均增加。随着应变速率的增加,半固态ZCuSn10铜合金压缩试样的过渡区域的液相增加。

 

关键字: 铜合金;半固态;单向压缩;组织演变

Microstructure evolution of semi-solid copper alloy billet during uniaxial compression
XIAO Han, CHEN Ze-bang, LI Yong, LU De-hong, ZHOU Rong-feng, ZHOU Rong

Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China

Abstract:The compression deformation experiments of semi-solid ZCuSn10 copper alloy billet prepared by SIMA (strain induced melt activation) process were carried out by using Gleeble-1500 thermo-mechanical simulator test. The experimental results show that the deformation resistance of the semisolid simples prepared by SIMA method is half of as-cast ZCuSn10 copper alloy. The liquid phase rate of semi-solid sample before and after compression is 19.4% and 8.1%, respectively. Compression test under different strain, strain rate and temperature, the liquid-solid separation phenomenon occurs in transition region of the semi-solid ZCuSn10 copper alloy sample. And liquid-solid separation occurs entirely in the central region. The greater the strain is, the less liquid content of the semi-solid copper alloy compression ZCuSn10 central part of the samples. The liquid content increases with increasing temperature, and increases with increasing strain rate.

 

Key words: copper alloy; semi-solid; uniaxial compression; microstructure evolution

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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