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李乃拥,肖 寒,熊 迟,卢德宏,周荣锋,蒋业华.半固态挤压铸造铜合金组织和力学性能研究[J].稀有金属材料与工程(英文),2018,47(9):2813~2820.[Li Naiyong,Xiao Han,Xiong Chi,Lu Dehong,Zhou Rongfeng and Jiang Yehua.Microstructure and mechanical properties of semi-solid extruded cast copper alloy[J].Rare Metal Materials and Engineering,2018,47(9):2813~2820.]
Microstructure and mechanical properties of semi-solid extruded cast copper alloy
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Received:February 02, 2018  Revised:February 07, 2018
DOI:
Key words: Copper alloy  semi-solid  squeeze casting  microstructure evolution  mechanical properties
Foundation item:国家自然科学基金(51665024),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重点项目(2011FA007)和面上项目(2014FB131)
Author NameAffiliation
Li Naiyong,Xiao Han,Xiong Chi,Lu Dehong,Zhou Rongfeng and Jiang Yehua  
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Abstract:
      In present work, a semi-solid ZCuSn10P1 copper alloy was used as the research object. A four-piece extrusion mold was independent designed. The semi-solid squeeze casting experiments were carried out. The effects of forming specific pressure and extrusion rate on microstructure and mechanical property of semi-solid ZCuSn10P1 copper alloy squeeze casting parts were investigated. The results show that with the specific pressure increase from 180 MPa to 250 MPa, the average diameter of the solid phase of semi-solid copper alloy decreases gradually from 89.25 μm to 77.96 μm, and the liquid fraction decreases from 36.7% to 22.3%, tensile strength increases from 318 MPa to 387 MPa, an increase amplitude of 21.70%, the elongation decreases from 4.2% to 2.8%. When the extrusion rate increases from 11mm /s to 15mm /s, the roundness of the solid phase is reduced from 1.54 to 1.32, the tensile strength increases from 368 MPa to 387 MPa, increased by 5.16%, the elongation decreases from 3.3% to 2.8%.