摘要
通过电导率、硬度、XRD、动力学4个方面研究Cu-2.4Ni-0.57Si-0.1Mg合金4种工艺下最佳的电导率与硬度配合。结果表明,试验合金经过热轧后在450℃时效4 h的硬度和电导率的配合最佳,综合性能达到最高点;通过时效处理从过饱和固溶体中析出Ni2Si相,使合金导电性上升,同时硬度也可大幅度提高。随着温度和时间的增加,发生了过时效现象,析出相长大,失去共格特征,Ni2Si又逐渐溶解到基体中,缺陷也逐渐减少,导致硬度显著下降。
By means of conductivity,hardness tests,XRD and dynamic analysis,Cu-2.4Ni-0.57Si-0.1Mg alloy＇s aging properties were researched to find the best combination of the conductivity and the hardness.The results show that the alloy through hot-rolled processing and 450 ℃ aging treatment for 4 h is the best one.The combination of the conductivity and the strength of the alloy reach the highest point.Through the aging treatment Ni2Si phase separates from crystal supersaturated,makes alloy conductive and strength increase greatly.With further increasing temperature and time,the over-aging phenomenon occurs,non-coherent precipitate phase forms and precipitate phase begins to grow,then Ni2Si begins to dissolved into the matrix as well as other defect,so the hardness of the alloy decreases markedly.
出处
《金属热处理》
CAS
CSCD
北大核心
2013年第1期50-53,共4页
Heat Treatment of Metals
关键词
铜合金
时效
热处理
电导率
硬度
copper alloy
aging
heat treatment
conductivity
hardness
