田伟,孙玥,毕莉明

• 1:上海理工大学理学院
• 2:上海理工大学科技处

摘要(Abstract)：

采用真空中频感应熔炼技术制备组织均匀的Cu-15Cr-0.24Zr合金铸锭,采用冷拔与冷轧相结合的变形工艺获得超高强度的薄板材料。利用扫描电镜、能谱仪、透射电镜和万能试验机研究合金枝晶Cr到纤维Cr的演变过程、铸态组织组成相的成分、冷轧变形量为95%时的Cu/Cr界面关系和合金不同变形阶段的抗拉强度。结果表明:随着变形量的增大,Cr枝晶演变为分布均匀、平行排列的Cr纤维,且Cr纤维的横截面经历了"V"形向"一"形的转变;Cu/Cr界面呈半共格关系排列,错配度为0.041,表明Cu/Cr界面结合良好;增大冷拔变形量,可以显著提高冷拔结合冷轧变形工艺制备的薄板材料的抗拉强度,当冷拔变形量从2.41增大到3.79时,冷轧变形量为95%时,薄板材料的抗拉强度从749 MPa升高到1011 MPa。

关键词(KeyWords)： Cu-Cr-Zr合金;纤维增强;变形方式;Cu/Cr界面;抗拉强度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(10874118)

作者(Author): 田伟,孙玥,毕莉明

DOI: 10.13289/j.issn.1009-6264.2017-0508

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