摘要
为进一步提高镁合金管材的力学性能,对反挤压成形的VW84M镁合金管材进行了不同减薄率的高温强力旋压,并进行了200℃/72 h的时效处理。采用光学显微镜与扫描电子显微镜相结合的方法,系统地表征了VW84M镁合金管材的微观组织结构,通过电子万能试验机上的单向拉伸实验对镁合金管材的力学性能进行了研究。结果表明,随着旋压减薄率的增大,镁合金管材的晶粒逐渐细化且第二相破碎程度逐渐变大,屈服强度和抗拉强度呈现单调上升趋势,当减薄率为52.5%时,管材的抗拉强度达到最大值387.1 MPa、伸长率降低至10.96%。旋压管材经时效处理后,力学性能得到大幅度提升。研究结果为制备高性能的回转体镁合金构件提供了理论和技术指导。
To further enhance the mechanical properties,VW84M magnesium alloy tubes produced by reverse extrusion were subjected to hot power spinning with varying thickness reductions,followed by an aging treatment at 200 C for 72 h.The microstructure of VW84M magnesium alloy tube was systematically characterized using a combination of optical microscopy(OM)and scanning electron microscopy(SEM),and the mechanical properties of magnesium alloy tubes were studied by tensile test on electronic universal test machine.The results show that with increasing thickness reduction,the grains are progressively refined and the second-phase particles become more fragmented.The yield strength and tensile strength of magnesium alloy tube increase with the increasing of the thickness reduction.When the thickness reduction is 52.5%,the tensile strength of the tube reaches the maximum,which is 387.1 MPa,and the elongation is reduced to 10.96%.After aging treatment,the mechanical properties of the spun tubes have been greatly improved.These findings provide theoretical and technical guidance for fabricating high-performance,axisymmetric magnesium alloy components.
作者
韩业翔
王宝
魏秋
孙逸舟
林鹏
曹晓卿
Han Yexiang;Wang Bao;Wei Qiu;Sun Yizhou;Lin Peng;Cao Xiaoqing(School of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Metal Forming Theory and Technology,School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)
出处
《锻压技术》
北大核心
2026年第2期145-151,共7页
Forging & Stamping Technology
基金
航空科学基金项目(20230036029003)
山西省基础研究计划项目(202303021222179)。
关键词
VW84M镁合金
热强力旋压
时效处理
微观组织
力学性能
VW84M magnesium alloy
hot power spinning
aging treatment
microstructure
mechanical properties
