变形量对Cu-Cr-Zr合金等温时效动力学的影响  

Effect of Deformation Amount on Isothermal Aging Kinetics of Cu-Cr-Zr Alloy

作　　者：马旭[1] 王顺兴[1] 刘勇[1] 王姗姗[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《热加工工艺》2009年第8期10-12,共3页Hot Working Technology

基　　金：河南省杰出人才基金资助项目(0521001200);河南省教育厅自然科学基金资助项目(2006430004);河南科技大学科研基金资助项目(2006ZY046)

摘　　要：采用在线电阻测试法研究经不同变形量的Cu-0.38Cr-0.12Zr合金的等温时效动力学。结果表明:等温时效动力学符合Avrami相变动力学经验方程;首次发现Cu-0.38Cr-0.12Zr合金的时效过程由两个析出过程组成,在大约340℃以下出现一个析出时效过程,在高于此温度时效时,将有两个过程发生,发生这两个过程的原因是Cu-Cr-Zr合金中在不同阶段有不同物质的析出;冷变形增加了材料内部的空位和位错密度,增大了时效动力学,使材料的电阻率随时效时间的增加而降低,最后趋于稳值,并且随变形量的增加,电阻率下降越快。The isothermal aging kinetics of Cu-0.38Cr-0.12Zr alloy with different deformation amount were studied through testing the electronic resistivity method. The results show that the aging kinetics is consistent with Avrami transformationkinetics equation. It is discovered that the aging of Cu-Cr-Zr alloy has the two processes of aging separation. At a lower temperature （〈340℃ ）, only the first process occurs, the two processes of aging occur above 340℃. The reason why the two processes occur is that different materials separate in different period in the Cu-Cr-Zr alloy. The vacancy and disloction density are increased by cold deformation. The aging kinetics is also increased, which makes the electronic resistivity decreases with the increase of the aging time, finally, the curves go steady. And the larger deformation the materials increase, the more rapidly the electronic resistivity decreases.

关 键 词：铜-铬-锆合金 冷变形 时效 动力学 电阻率 

分 类 号：TG146.1[一般工业技术—材料科学与工程]