单向压缩半固态铜合金的显微组织演变

发布时间：2019-02-10 19:54

【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。
[Abstract]:Unidirectional compression experiments of semi-solid and as-cast ZCuSn10 copper alloy billets prepared by strain induced melting activation method were carried out by Gleeble-1500 thermal / mechanical simulation machine. The effect of compression deformation conditions on the microstructure of semisolid ZCuSn10 copper alloy billets was analyzed. The results show that the deformation resistance of semisolid compression specimens prepared by SIMA method is only half of that of conventional ZCuSn10 copper alloy compression specimens. The liquid rate of semi-solid sample is 19.4 before compression and 8.1 after compression deformation. Under different strain, deformation temperature and strain rate of semisolid ZCuSn10 copper alloy, the liquid-solid separation began to occur in the transition zone, and the liquid-solid complete separation was observed in the central region. The higher the amount of deformation, the less liquid phase in the center of the compression specimen of semisolid ZCuSn10 copper alloy. With the increase of temperature, the liquid phase in the end, transition region and center of semisolid ZCuSn10 copper alloy increases. With the increase of strain rate, the liquid phase in the transition region of semisolid ZCuSn10 copper alloy is increased.
【作者单位】：昆明理工大学材料科学与工程学院;
【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)~~
【分类号】：TG146.11

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