期刊
RARE METALS
卷 30, 期 6, 页码 650-656出版社
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-011-0444-9
关键词
Cu-Cr-Zr-Ag alloy; thermomechanical treatment; microstructure; tensile strength; electrical conductivity
资金
- National High-Tech Research and Development Program of China [2006AA03Z522]
- National Natural Science Foundation of China [50704006]
- CHALCO [CHINACO-2009-KJ-02]
The effects of thermomechanical treatment on the properties and microstructure of Cu-Cr-Zr alloy and Cu-Cr-Zr-Ag alloy were investigated. Ag addition improves the mechanical properties of the alloy through solid solution strengthening and brings a little effect on the electrical conductivity of the alloy. A new Cu-Cr-Zr-Ag alloy was developed, which has an excellent combination of the tensile strength, elongation, and electrical conductivity reaching 476.09 MPa, 15.43% and 88.68% IACS respectively when subjected to the optimum thermomechanical treatment, i.e., solution-treating at 920A degrees C for 1 h, cold drawing to 96% deformation, followed by aging at 400A degrees C for 3 h. TEM analysis revealed two kinds of finely dispersed precipitates of Cr and Cu4Zr. It is very important to use the mechanisms of solid solution strengthening, work hardening effect as well as precipitate pinning effect of dislocations to improve tensile strength of the alloy without adversely affecting its electrical conductivity.
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