( 1. 福州大學 材料科學與工程學院, 福州 350002;
2. 福建工程學院 機電與自動化工程系, 福州 350014)
摘 要: 采用動態(tài)熱/力模擬實驗技術(shù)對經(jīng)不同熔體處理的易拉罐用鋁材進行高溫壓縮變形實驗， 并用光學顯微鏡、 透射電鏡分析探討其熱變形組織特征。 結(jié)果表明： 冶金質(zhì)量影響易拉罐用鋁材的動態(tài)再結(jié)晶組織特征， 在未處理或常規(guī)熔體處理狀態(tài)下存在枝晶網(wǎng)胞結(jié)構(gòu)， 晶粒組織不均勻； 高效熔體處理使易拉罐用鋁材在較低的溫度下即可通過亞晶合并方式發(fā)生動態(tài)再結(jié)晶， 并在變形溫度573~673 K、 應(yīng)變速率0.1~1.0 s-1、 變形量約0.7的較寬的熱變形工藝條件下可獲得細小且分布較均勻的再結(jié)晶晶粒組織。
關(guān)鍵字: 易拉罐用鋁材； 熔體處理； 熱壓縮變形； 微觀組織； 動態(tài)再結(jié)晶
different melt-treatments used for easy-open can
WANG Huo-sheng2, WANG Qin-feng1
（ 1. College of Materials Science and Engineering,
Fuzhou University, Fuzhou 350002, China;
2. Department of Electromechanical and Automation Engineering,
Fujian University of Technology, Fuzhou 350014, China）
Abstract: Compression test at elevated-temperature of aluminum sheets used for easy-open can prepared by different melt-treatment were carried out with dynamic thermal/mechanical simulation experimental technique. And the feature of hot deformation microstructure of the sheets was studied preliminarily by opitical microscope, transmission electron microscope. The results show that the metallurgical quality of the sheets influences dynamic recrystallization. Dendrite net-cells exist in the sheets prepared without melt-treatment or by routine melt-treatment and the distribution of grain size is non-uniform; dynamic recrystallization occurs easily by means of subgrain merging at the lower temperature in the sheet prepared by high-efficiency melt-treatment, and the tiny and evenly distributed grains can be obtained under the wider hot deformation condition. It is the ideal hot deformation condition that the sheet prepared by high-efficiency melt-treatment is deformed at 573-673 K with the strain rate of 0.1-1.0 s-1 and the strain of 0.7.
Key words: aluminum sheet used for easy-open can; melt-treatment; hot compression deformation; microstructure; dynamic recrystallization
