文章信息/Info

Title:

Effect of Axial Close Rolling on the Structure and Performance of 7050 Aluminum Alloy

作者:

趙佳航; 王建國; 劉東; 楊文華; 南俊剛; 張宇; 梁郅睿

1.西北工業大學材料學院，陜西 西安 710072 2.安徽漢正軸承科技有限公司，安徽 宿州 234000 3.中國工程物理研究院機械制造工藝研究所，四川 綿陽 621000

Author(s):

ZHAO Jiahang; WANG Jianguo; LIU Dong; YANG Wenhua; NAN Jungang; ZHANG Yu; LIANG Zhirui

1.School of Materials, Northwestern Polytechnical University, Xi’an 710072, China 2.Anhui Hanzheng Bearing Technology , Suzhou 234000, China 3.Institute of Mechanical Manufacturing Technology, China Academy of Engineering Physics, Mianyang 621000, China

關鍵詞:

軸向閉式輾軋; 7050鋁合金; 組織和性能; 鋁合金厚板; ACDR

Keywords:

axial close die rolling;  7050 aluminum alloy;  structure and performance;  Aluminum alloy thick plate;  ACDR

文獻標志碼:

A

摘要:

通過軸向閉式輾軋成形技術（axial close die rolling，ACDR）對7050鋁合金進行成形加工和仿真模擬，研究了軸向閉式輾軋成形對7050鋁合金組織和性能的影響。結果表明軸向閉式輾軋成形后7050鋁合金厚板的應變分布為：中心＞1/2R＞邊緣，成形過程中存在蘑菇效應。通過OM和SEM觀察組織后發現不同位置的鍛態組織存在一定差異，中心位置在成形時發生亞晶合并形成等軸晶組織，1/2R處發生動態回復晶粒沿垂直于變形方向長大，邊緣處組織已模糊不清呈現纖維狀組織。經過472 ℃×150 min固溶處理和120 ℃×400 min，160 ℃×360 min雙級時效處理后分別對中心和邊緣進行徑向和弦向常溫拉伸性能測試，結果表明軸向閉式輾軋成形后7050鋁合金在中心和邊緣處的屈服強度和延伸率存在一定差異，在徑向和弦向兩個方向力學性能差異不大。

Abstract:

The effect on the microstructure and properties of 7050 aluminum alloy was studied by axial close die rolling (ACDR). The results show that the strain distribution of 7050 aluminum alloy thick plate is as follows: center>1/2R>edge, and mushroom effect exists in the forming process. By OM and SEM, it was found that there were some differences in the forged structure at different locations. The central position is dynamically recrystallized during forming, the dynamic recovery grain grew up perpendicular to the deformation direction at 1/2R, and the structure at the edge was blurred and showed a fibrous structure. After solution treatment at 472 ℃×150 min and dual aging treatment at 120 ℃×400 min, 160 ℃×360 min, radial and chord tensile properties of the core and edge were tested at room temperature, respectively. The results show that there are some differences in the yield strength and elongation of 7050 aluminum alloy at the core and edge, and little difference in the mechanical properties in the radial and chordwise.