通过将QCr0.5铜合金在不同温度下进行时效处理,分析其析出相时效析出过程,结果表明：QCr0.5铜合金在固溶变形处理后,400℃及以下由于析出动力不足,难以形成有效的析出相结构,材料保持形变结构特征;425℃时效2 h材料内部形成GP区,450℃开始析出共格的纳米析出相,475℃纳米析出相的析出比较均匀,大小在4～6 nm左右,材料的强度和导电率均达到较高的水平;当温度升至500℃时,2 h时效后析出相出现共格失配现象,随着温度的进一步提高,析出相开始长大,完全失去共格效应,同时材料的硬度出现明显的下降。
Precipitate evolution of precipitate in a QCr0.5 copper alloy during aging at different temperatures was analyzed. The results show that no significant precipitates are observed and the solid-solutioned and deformed microstructure is maintained for the QCr0. 5 copper alloy after aging at 400℃ , GP zones are formed for the alloy after aging at 425 ℃ for 2 h, coherent nano precipitate phase is detected in the alloy aged at 450 ℃, and coherent nanoparticles of precipitate phase with size of 4-6 nm and uniform distribution are found in the aged alloy at 475 ℃. The strength and electrical conductivity of the material aged at 475 ℃ exhibit a higher level. When the aging temperature increases to 500 ℃, non-coherent precipitate phase forms and with further increasing of the temperature the precipitate phase begins to grow, while the hardness of the alloy decreases markedly.
参考文献
| [1] | Rieder W F;Schussk M;Glatzle W et al.Influence of composition and Cr particle size of Cu/Cr contacts on chopping current,contact resistance and breakdown voltage in vacuum interrupters[J].IEEE Transactions on Components Packaging and Manufacturing Technology,1989,12(02):273-283. |
| [2] | 冼爱平,朱耀宵.Cu-Cr触头合金制备技术的发展[J].金属学报,2003(03):225-233. |
| [3] | 王秀敏,韩会民,丛吉远,王玉魁.深冷处理后CuCr真空触头材料的组织性能研究[J].金属热处理学报,2000(04):57-61. |
| [4] | SHUAI Ge-wang;ZHANG Meng;YAN Yong-li .The effect of rare elements on Cr precipitations in Cu-0.8wt% Cr alloy[J].Image Anal S|ereol,2004,23:137-141. |
| [5] | Zihui Xiao;Zhiqiang Ma;Xinkui Wang .Effects of Synthetic Parameters on the Structure and Catalytic Performance of Cu-Cr Catalysts Prepared by a Non-Alkoxide Sol-Gel Route[J].Industrial & Engineering Chemistry Research,2011(4):2031-2039. |
| [6] | Kouhanjani;Saeed Asadi;Zare-Bidaki et al.Influence of prior cold working on the tribological behavior of Cu~3.65 wt.% Cr alloy[J].Journal of Alloys and Compounds,2009,480(02):505-509. |
| [7] | 戴起勋.金属材料学[M].北京:化学工业出版社,2005:188-189. |
| [8] | Ryu H J;Baik H K;Hong S H .Effect of thermomechanical treatments on microstueture and roperties of Cu-base leadframe alloy[J].Materials Science and Engineering,2000,35(03):3641-3646. |
| [9] | Yang ZM;Zhang QL;Wang QF;Zhang CY;Ding BJ .Vacuum arc characteristics on nanocrystalline CuCr alloys[J].Vacuum: Technology Applications & Ion Physics: The International Journal & Abstracting Service for Vacuum Science & Technology,2006(4):545-549. |
| [10] | 嗣海涛;钟建伟;周啸 等.多级形变时效刈,cu-cr-zr合会组织和性能的影响[J].材料热处理学报,2009,30(03):141-145. |
| [11] | Dmitriev V A;Po|uyanov V N;Poluyanova 1 N.Experimental evaluation of the high-current drawn arc energy balance[J].Prne In| Syrup Discharge Eleclr lnsul Vat,2006(l):419-422. |
| [12] | 冯品;腺敬超;丁杰 等.快速凝同法制备过饱和CuCr合金时效析出动力学[J].稀有金属材料与工程,2009,38(02):281-285. |
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