镁合金尾翼类构件径向同步加载工艺研究  

Radial Synchronous Loading Forming of Magnesium Alloy Empennage-shape Components

作　　者：张治民[1,2] 贾晶晶 董蓓蓓 薛勇[1,2] ZHANG Zhimin;JIA Jingjing;DONG Beibei;XUE Yong(School of Materials Science and Engineering,North University of China,Taiyuan 030051,China;.Innovation Center of Science and Technology Industry of National Defense for Complex Component Extrusion Forming Technology,North University of China,Taiyuan 030051,China;School of Mechanical and Electrical Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学材料科学与工程学院,太原030051 [2]中北大学国防科技工业复杂构件挤压成形技术创新中心,太原030051 [3]中北大学机电工程学院,太原030051

出　　处：《精密成形工程》2024年第7期57-65,共9页Journal of Netshape Forming Engineering

基　　金：中国科协青年人才托举工程(2022QNRC001);山西省青年科学研究项目(202203021212145)。

摘　　要：目的针对常规挤压工艺成形尾翼类构件飞行时翼片径向产生挠曲变形的问题,提出了一种可调控金属流动的径向同步加载成形方法。方法结合ANSYS、Deform-3D有限元模拟和物理实验,分析径向同步加载的金属流动行为、等效应变和金属流线分布,通过拉伸实验测试成形翼片挤压方向(Extrusion Direction,ED)和横截面方向(Transverse Direction,TD)的力学性能,并通过观察显微组织揭示径向强化机理。结果径向同步加载通过对坯料施加周向压应力促进了金属径向流动,形成了沿径向分布良好的金属流线,有利于提升径向力学性能;采用该工艺试制构件表面质量良好,无宏观缺陷,且形成沿径向分布的宏观流线;翼片径向力学性能显著提升,屈服强度提升了57.8 MPa,抗拉强度提升了80.1 MPa,延伸率提升了1.4%,其强塑性的提升与纤维组织和块状LPSO相的纤维强化密切相关。结论实现了尾翼类构件的径向同步加载整体成形,通过调控金属流动形成径向分布良好的金属流线,提升了成形翼片径向强度,为高性能镁合金尾翼类构件的整体成形提供了理论基础和技术支撑。In order to solve the problem that the wing in the empennage-shape components formed by the conventional extrusion process is prone to radial flexural deformation,the work aims to propose a radial synchronous loading(RSL)forming method with adjustable metal flow.Through the combination of ANSYS,Deform-3D finite element simulation(FEM)and physical experiment,the metal flow behavior,equivalent strain and metal streamline distribution of RSL were analyzed.The mechanical properties of the wing in extrusion direction(ED)and transverse direction(TD)were tested by tensile test,and the radial strengthening mechanism was revealed by microstructure observation.The RSL promoted the radial flow of metal by applying circumferential compressive stress to the billet,forming a well-distributed metal streamline along the radial direction,which was conducive to improving the radial mechanical properties.The surface quality of the formed component was good,without macroscopic defect,and a macroscopic streamline distributed along the radial direction was formed.The radial mechanical properties of the wing were significantly improved,the yield strength(YS)increased by 57.8 MPa,the ultimate tensile strength(UTS)increased by 80.1 MPa,and the elongation(EL)increased by 1.4%.The improvement of the strength and plasticity was closely related to the fiber microstructure and the fiber strengthening of the block-shaped LPSO phase.The proposed process realizes the RSL integral forming of empennage-shape components.By regulating the metal flow,a metal streamline with good radial distribution is formed,and the radial strength of the formed wing is improved,which provides theoretical basis and technical support for the integral forming of high-performance magnesium alloy empennage-shape components.

关 键 词：尾翼类构件 径向同步加载 整体成形 金属流线 VW124A镁合金 

分 类 号：T146.2[一般工业技术]