李南婷,鲁若鹏,赵宇宏,等.自然时效、加工硬化对共享单车轮毂微观组织及性能影响研究[J].精密成形工程,2022,14(3):116-123.
LI Nan-ting,LU Ruo-peng,ZHAO Yu-hong,et al.Effect of Natural Aging and Work Hardening on Microstructure and Performance of Shared Bicycle Wheels[J].Journal of Netshape Forming Engineering,2022,14(3):116-123. |
| 自然时效、加工硬化对共享单车轮毂微观组织及性能影响研究 |
| Effect of Natural Aging and Work Hardening on Microstructure and Performance of Shared Bicycle Wheels |
| 投稿时间：2021-10-13 |
| DOI：10.3969/j.issn.1674-6457.2022.03.015 |
| 中文关键词: AM60镁合金 显微组织 力学性能 阻尼性能 |
| 英文关键词: AM60 magnesium alloy microstructure mechanical properties damping performance |
| 基金项目:国家自然科学基金(51801189);山西省科技重大专项(20191102008);山西省青年科技研究基金(201801D221152);中北大学青年学术带头人资助(11045505);中央引导地方科技发展专项资金(YDZX20191400002796) |
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| 摘要点击次数: 1927 |
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| 中文摘要: |
| 目的 以不同工作状态下AM60B镁合金压铸成形的共享单车轮毂为研究对象，探讨镁合金作为自行车轮毂材料的实际应用特性。方法 选取直接压铸的镁合金轮毂A，放置4年的轮毂B以及通过疲劳试验模拟高强度使用后的轮毂C为研究对象，对不同状态下压铸镁合金轮毂的微观组织、力学性能与阻尼性能进行研究。结果 轮毂A抗拉强度为215 MPa，屈服强度为97 MPa，伸长率为17.86%;轮毂B中微观组织几乎无变化，但塑性出现一定下降，其阻尼性能最佳;轮毂C拥有更好的强度及塑性，阻尼性能有所改善。结论 轮毂B塑性的下降与阻尼的提升可能与固溶原子的扩散有关。轮毂C出现了加工硬化的现象，局部存在混晶组织，这是其性能增强的原因所在。 |
| 英文摘要: |
| The work aims to study the shared bicycle wheels of die-casting AM60B magnesium alloys under different working conditions to explore the practical application characteristics of Mg-alloy as bicycle wheels. The wheel A of die-casting magnesium alloy, the wheel B placed for four years, and the wheel C used in high intensity simulated by fatigue test were selected as the research objects to study the microstructure, mechanical properties and damping properties of die-casting alloy under different states. The tensile strength of the wheel A was 215 MPa, yield strength was 97 MPa, and elongation was 17.86%. The microstructure of wheel B had almost no change, but the plasticity declined to some extent, and the damping performance was the best. After fatigue test, wheel C had better strength and plasticity, and the damping performance was improved. The decrease in plasticity of the wheel B and the increase in damping performance may be related to the diffusion of solid solution atoms. The wheel C has a work hardening phenomenon, with a mixed crystal structure locally, which is the reason for the enhanced performance. |
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