Cu_(50)Zr_(50)合金不同过热度的冷却曲线分析  

Analysis of cooling curve of Cu_(50)Zr_(50)with different superheat

作　　者：王建华 王精华 刘富强 高杰 WANG Jianhua;WANG Jinghua;LIU Fuqiang;GAO Jie(Xinxing Special Steel Pipes Corporation,Handan 056500,Hebei,China;Hebei Xinxing Cast Pipe Co.,Ltd.,Handan 056500,Hebei,China)

机构地区：[1]邯郸新兴特种管材有限公司,邯郸056500 [2]河北新兴铸管有限公司,邯郸056302

出　　处：《四川冶金》2024年第4期49-52,共4页Sichuan Metallurgy

摘　　要：针对Cu_(50)Zr_(50)在大气中易被氧化,冷却曲线分析实验和检测困难等问题,采用覆盖渣技术,通过测量不同加热温度下Cu_(50)Zr_(50)的冷却曲线,应用热分析技术研究其凝固和生长过程,以揭示不同过热度熔体结构与凝固规律的关系。结果表明:Cu_(50)Zr_(50)合金不同温度的凝固曲线状态明显不同,形核开始温度和过冷度随温度的不同而发生改变;经历液-液结构转变的Cu_(50)Zr_(50)液态合金凝固时形核过冷度减小,但形核驱动力增大,凝固组织细化。Cuso Zrso is easy to be oxidized in the atmosphere,and it is difficult to analyze and detect the cooling curve.In this paper,the cooling curve of Cu_(50)Zr_(50)at different heating temperatures was measured by covering slag technique,and the solidification and growth process of Cu_(50)Zr_(50)was studied by thermal analysis technique to reveal the relationship between the structure of melt with different superheat and the solidification law.The results show that the solidification curves of Cu_(50)Zr_(50)alloy are obviously different at different temperatures,and the initial nucleation temperature and supercooling degree change with temperature.The undercooling of Cu_(50)Zr_(50)liquid alloy after liquidliquid structure transformation decreases during solidification,but the driving force of nucleation increases,and the solidification structure is refined.

关 键 词：Cu_(50)Zr_(50)合金 凝固行为 形核驱动力 凝固组织 

分 类 号：TG13[一般工业技术—材料科学与工程]