(1. 河南科技大學(xué) 材料科學(xué)與工程學(xué)院，洛陽 471023；
2. 河南科技大學(xué) 河南省有色金屬材料科學(xué)與加工技術(shù)重點(diǎn)實(shí)驗(yàn)室，洛陽 471023)
摘 要: 對Cu-0.36Cr-0.03Zr合金進(jìn)行時(shí)效處理，研究時(shí)效溫度和時(shí)間對合金性能和組織的影響，借助高分辨透射電鏡觀察時(shí)效析出相的組織形態(tài)，并研究不同溫度下該合金的時(shí)效析出動(dòng)力學(xué)。結(jié)果表明：經(jīng)過時(shí)效處理后，析出相彌散分布，提高了合金的顯微硬度和導(dǎo)電率，經(jīng)500 ℃時(shí)效2 h后，合金硬度和導(dǎo)電率分別達(dá)到153.9 HV和84.54 %IACS；通過微觀分析確定在550 ℃時(shí)效2 h后合金中存在Cr和Cu4Zr兩種析出相；通過對導(dǎo)電率與析出相體積分?jǐn)?shù)關(guān)系的分析，確定合金在不同溫度下時(shí)效的相變動(dòng)力學(xué)Avrami經(jīng)驗(yàn)方程和導(dǎo)電率方程，并繪制等溫轉(zhuǎn)變動(dòng)力學(xué)曲線。
關(guān)鍵字: Cu-0.36Cr-0.03Zr合金；時(shí)效處理；組織；相變動(dòng)力學(xué)方程
（1.School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China;
2. Henan Key Laboratory of Advanced Non-ferrous Metals, Henan University of Science and Technology, Luoyang 471023, China）
Abstract:The effects of aging temperature and aging time on the microstructure and properties of Cu-0.36Cr-0.03Zr alloy aged at different temperatures were studied. The morphology of precipitation was observed by means of high resolution transmission electron microscope and the aging kinetics of the alloy was studied. The results show that the precipitates are dispersed and the microhardness and electrical conductivity are enhanced to 153.9 HV and 84.54 %IACS, respectively, due to aging treatment at 500 ℃ for 2 h. There are Cr and Cu4Zr precipitates existing in the alloy aged at 550 ℃ for 2 h through the micro-analysis. The Avrami equation of phase transformation kinetics and the electrical conductivity equation are obtained, while the transformation kinetics curve is drawn through the analysis of the relationship between electrical conductivity and volume fraction of precipitates.
Key words: Cu-0.36Cr-0.03Zr alloy; aging treatment; microstructure; phase transformation kinetics equation
