5B02铝合金导管热弯与冷弯对比
Comparison of hot bending and cold bending of 5B02 aluminum alloy tube
查也涵 1张迪 1周富强 1李涛 1白鹏飞 1姚文琪1
作者信息
- 1. 国营芜湖机械厂,安徽 芜湖 241000
- 折叠
摘要
航空器使用的导管可以用直管弯曲而成.为探讨 5B02 铝合金导管的弯曲性能,选用直径 30 mm、壁厚 1mm的5B02 铝合金管进行冷弯与热弯,对两种工艺生产的导管的宏观形貌、显微组织和显微硬度进行分析.结果表明,冷弯导管表面出现褶皱;加热30s热弯,可获得表面成形好的导管.热弯过热时管材产生微裂纹,持续加热后表面裂纹扩展形成孔洞.过热后持续加热导管显微组织中出现大尺寸复熔球、加粗的复熔晶界以及三角晶界为典型的过烧组织.热弯导管的硬度比冷弯导管的硬度大.
Abstract
The tubes used in aircraft can be bent with straight pipes.To explore the per-formance of 5B02 aluminum alloy tubes,5B02 aluminum alloy tubes with diameter of 30 mm and wall thickness of 1 mm were selected for cold bending and hot bending,and the macro-scopic morphology,microstructure and microhardness of the tubes produced with the two processes were analyzed.The results show that folds appear on the surface of the cold-formed tube.A well-formed tube can be obtained by hot bending for 30 s' heating.Micro-cracks occur in the tube during hot bending and the surface cracks expand to form holes after contin-uous heating.Large remelting spheres,thickened remelting grain boundaries and triangular grain boundaries appear in the microstructures of continuously heated tubes after superhea-ting,which are typical overburnt structures.The hot-formed tube is harder than the cold-formed tube.
关键词
热弯/冷弯/5B02铝合金导管/显微组织/显微硬度/褶皱Key words
hot bending/cold bending/5B02 aluminum alloy tube/microstructure/mi-crohardness/fold引用本文复制引用
出版年
2024
NETL
NSTL
万方数据