| 本文已被：浏览 822次 下载 1114次 |
码上扫一扫！ |
|
|
| 热处理对 2219 铝合金薄壁旋压管组织与性能的影响 |
|
祝世强1,2,3, 王永铭3, 王克环1,2, 刘 钢1,2, 苑世剑1,2
|
|
1. 哈尔滨工业大学材料科学与工程学院，哈尔滨 150001;2. 哈尔滨工业大学金属精密热加工
国家级重点实验室，哈尔滨 150001;3. 首都航天机械有限公司，北京 100076
|
|
| 摘要: |
| 本文对 2219 铝合金薄壁旋压管进行了退火、固溶及时效热处理，研究了热处理工艺对微观组织、拉
伸性能和液压胀形性能的影响。结果表明：2219 铝合金旋压管在 400 ℃以下退火时以回复为主，温度高于 450 ℃
时发生再结晶。随退火温度升高，基体组织逐渐由形变组织向再结晶组织转变。固溶处理时随固溶时间延长，再
结晶程度逐渐增加，位错密度降低。经退火和固溶处理后，管材的硬化率和延伸率显著提高，抗拉强度随着退火
和固溶温度升高而逐渐增大，固溶处理后抗拉强度达到 340 MPa，延伸率提高到 25%。时效处理后管材的抗拉强
度进一步提高到 435.2 MPa。管材液压胀形极限随热处理温度升高而升高，固溶态 2219 铝合金旋压管具有较好
的液压胀形能力，适合进行液压成形。 |
| 关键词: 2219 铝合金 旋压管 热处理 组织性能 液压成形 |
| 基金项目: |
|
| Effects of Heat Treatments on the Microstructure and Property of 2219 Aluminum Alloy Thin-walled Spun Tube |
|
Zhu Shiqiang1,2,3, Wang Yongming3, Wang Kehuan1,2, Liu Gang1,2, Yuan Shijian1,2
|
|
1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001;2. National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001;3. Capital Aerospace Machinery Co., Ltd., Beijing 100076
|
| Abstract: |
| In this paper, three different heat treatments were carried out on the spun tube of 2219 aluminum alloy, and
the microstructure, tensile property and hydro-bugling limit after heat treatment were characterized. The influence of heat
treatments on microstructure and properties was studied. Results showed that the recovery was dominant when annealed
below 400 ℃, and recrystallization occurred when annealed at 450 ℃. As the annealing temperature increased, the matrix
microstructure gradually evolved from deformed microstructure to recrystallized microstructure. Under the condition of
solution treatment, the recrystallization degree increased gradually and the dislocation density decreased with the
increasing holding time. The hardening rate and elongation of the tubes were significantly improved, and the tensile
strength increased gradually with the increasing annealing and solution treatment temperature. After solution treatment at
530 ℃, the tensile strength and elongation were 340 MPa and 25%, respectively. After solution and aging treatment, the
tensile strength further increased to 435.2 MPa. The bulging limit of the tube increased with the heat treatment temperature.
The solid solution treated 2219 aluminum alloy spun tube had good hydro-bugling capacity and was suitable for hydroforming. |
| Key words: 2219 aluminum alloy spun tube heat treatment microstructure and property hydroforming |
