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。
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.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2016年第12期2537-2545,共9页
The Chinese Journal of Nonferrous Metals
基金
高等学校博士学科点专项科研基金资助项目(20125314120013)
云南省应用基础研究面上项目(2014FB131)
国家级大学生创新创业训练计划项目(201410674001)
云南省教育厅科学研究基金重点项目(2015Z031)~~
关键词
铜合金
半固态
单向压缩
组织演变
copper alloy
semi-solid
uniaxial compression
microstructure evolution