AZ31镁合金管材低温旋压及退火后径向梯度组织与力学性能

doi:10.13251/j.issn.0254-6051.2026.02.002

金属热处理 ›› 2026, Vol. 51 ›› Issue (2): 10-15.DOI: 10.13251/j.issn.0254-6051.2026.02.002

AZ31镁合金管材低温旋压及退火后径向梯度组织与力学性能

孙逸舟, 林鹏, 崔晓磊, 韩业翔, 魏秋

太原理工大学材料科学与工程学院, 山西太原 030024

收稿日期:2025-09-12 修回日期:2026-01-02 发布日期:2026-03-05
通讯作者: 林鹏,副教授,博士,E-mail:linpeng@tyut.edu.cn
作者简介:孙逸舟(1999—),男,硕士研究生,主要研究方向为旋压成形,E-mail:sunyizhou2022@163.com。
基金资助:
航空科学基金项目(20230036029003)

Radial gradient microstructure and mechanical properties of AZ31 magnesium alloy tubes after low-temperature spinning and annealing

Sun Yizhou, Lin Peng, Cui Xiaolei, Han Yexiang, Wei Qiu

College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China

Received:2025-09-12 Revised:2026-01-02 Published:2026-03-05

摘要/Abstract

摘要： 为了制造出具有优良性能的镁合金薄壁管材,对AZ31镁合金管材在室温及低温下进行强力旋压,并进行不同工艺的退火处理,通过光学显微镜、显微硬度计及万能试验机研究了不同旋压变形量及退火工艺下管材的微观组织和力学性能。结果表明:管材经强力旋压后,变形量由表及里逐渐减小,呈现出明显的梯度结构;退火后,管材表面发生静态再结晶,晶粒较中部和内部发生明显细化,且低温旋压管材退火更容易发生再结晶。经旋压后退火的管材抗拉强度明显提升,低温旋压减薄量4%的管材退火5 min后,抗拉强度由原始管材的229.7 MPa提高至308.2 MPa,但断后伸长率由17.2%降低至10.2%。

关键词: 低温旋压, 退火处理, 梯度组织, 力学性能

Abstract: In order to produce magnesium alloy thin-walled tubes with excellent performance, AZ31 magnesium alloy tube was strongly spun at room temperature and low-temperature, then annealed under different processes, and the microstructure and mechanical properties of the tube with different spinning reductions and annealing processes were investigated by means of metallographic microscope, microhardness tester and universal testing machine. The results show that the deformation of the tube gradually decreases from the surface to the inside after strong spinning, showing an obvious gradient structure. After annealing, static recrystallization occurs on the surface of the tube, where the grain is significantly finer than that in the middle and inside, and the low-temperature spun tubes are more prone to recrystallization after annealing. The tensile strength of the tubes annealed after spinning is significantly improved, and the tensile strength of the tube annealed for 5 min after low-temperature spinning with reduction of 4% increases from 229.7 MPa(original tube) to 308.2 MPa, but the elongation decreases from 17.2% to 10.2%.

Key words: low-temperature spinning, annealing, gradient microstructure, mechanical properties

中图分类号:

TG166.4

孙逸舟, 林鹏, 崔晓磊, 韩业翔, 魏秋. AZ31镁合金管材低温旋压及退火后径向梯度组织与力学性能[J]. 金属热处理, 2026, 51(2): 10-15.

Sun Yizhou, Lin Peng, Cui Xiaolei, Han Yexiang, Wei Qiu. Radial gradient microstructure and mechanical properties of AZ31 magnesium alloy tubes after low-temperature spinning and annealing[J]. Heat Treatment of Metals, 2026, 51(2): 10-15.

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AZ31镁合金管材低温旋压及退火后径向梯度组织与力学性能

Radial gradient microstructure and mechanical properties of AZ31 magnesium alloy tubes after low-temperature spinning and annealing

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