(中南工業(yè)大學(xué)材料科學(xué)與工程系，長沙 410083)
摘 要: 制備了Zr含量不同的三種CuZn合金，通過拉伸力學(xué)性能測試、金相和電鏡觀察，研究了微量Zr對合金組織和性能的影響。結(jié)果表明，微量Zr對合金有明顯的強(qiáng)化和提高退火過程中抗軟化溫度的作用；微量Zr引起的強(qiáng)化來源于再結(jié)晶晶粒細(xì)化強(qiáng)化，含Zr的第二相析出強(qiáng)化和亞結(jié)構(gòu)強(qiáng)化3個(gè)方面。
關(guān)鍵字: 鋯；銅合金；顯微組織；力學(xué)性能
（Department of Material Science and Engineering,
Central South University of Technology, Changsha 410083, P.R.China）
Abstract:Three kinds of Cu-13Zn alloys with different Zr contents were prepared. The influence of trace Zr on the microstructure and mechanical properties of Cu-13Zn was studied by means of tensile test, optical microscopy and transmission electron microscopy. The results show that adding trace Zr to Cu-13Zn alloy can greatly increase the strength of the alloy and enhance the recrystallization temperature range during annealing after cold rolling. Fine grain strengthening, precipitation strengthening and substructure strengthening caused by compounds containing Zr should be responsible for the strengthening of Cu-Zn-Zr alloys.
Key words: Zr; copper alloys; microstructure; mechanical properties
