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本文分析研究了Zr在新研制的CuCoBeZr合金凝固、冷却和最终时效时的析出顺序,它的存在形态及对合金高温性能的作用。结果表明:凝固、冷却过程中,Zr首先呈Cu_3Zr微细颗粒析出,可阻碍α-Cu的晶粒长大,并成为CoBe的大量结晶核心,细化初生CoBe既起到变质作用,时效时也有Cu_3Zr微细颗粒析出。Cu_3Zr在较高使用温度下不易聚集长大,可提高合金的再结晶温度,从而大大改善合金的高温机械性能。
In this paper, the order of Zr precipitation during the solidification, cooling and final aging of the newly developed CuCoBeZr alloy was analyzed. Its existing morphology and its effect on the high temperature properties of the alloy were investigated. The results show that during solidification and cooling, Zr precipitates as fine Cu_3Zr particles, which can hinder the growth of α-Cu grains and form a large number of CoBe nuclei. The refined primary CoBe plays a role of both metamorphism and Cu_3Zr Fine particles precipitated. Cu_3Zr is not easy to aggregate and grow at higher temperatures, which can increase the recrystallization temperature of the alloy and greatly improve the mechanical properties of the alloy at high temperature.