摘要: |
以法兰盘为研究对象,研究5B70铝钪合金热挤压成形工艺,分析其成形过程中金属充填流动、载荷变化以及变形均匀性情况。进行5B70铝合金法兰盘热挤压成形工艺试验,模具温度(380±5)℃,坯料温度(400 ±5)℃,成形载荷为350t。分析原材料和热挤压件不同部位力学性能和显微组织,同原始坯料相比,法兰盘各处性能均有所增强,其中挤压变形量越大,力学性能越好,晶粒越细小。抗拉强度σb达到402MPa,屈服强度σs达到268MPa,延伸率达到22.8%。为新型铝钪合金工程化应用提供了一定理论依据。 |
关键词: 热挤压;法兰盘;5B70铝合金;工程应用 |
基金项目: |
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Study on Hot Extrusion Forming Technology of 5B70 Aluminum Alloy |
Liu Qi1, Sai Yin2, Gao Hui1, Li Baoyong1, Wang Guofeng3
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1. Beijing Hangxing Technology Development Co., Ltd.;2. Second Military Representative Office of Air Force Equipment Department in Beijing;3. College of Materials Science and Engineering, Harbin Institute of Technology
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Abstract: |
Taking the flange as the research object, the hot extrusion process of 5B70 Al-Sc alloy was studied. The metal filling flow, load variation and deformation uniformity during flange forming were analyzed. The hot extrusion process test of 5B70 aluminium alloy flange was carried out. The die temperature was (380±5)℃, the billet temperature was (400±5)℃, and the forming load was 350t. The mechanical properties and microstructures of different parts of raw materials and hot extruded parts were analyzed. Compared with the original blank, the properties of flange were enhanced everywhere. The larger the extrusion deformation, the better the mechanical properties, and the smaller the grain size. the tensile strength σb reached 402MPa, the yield strength σs reached 268MPa, and the elongation reached 22.8%. This paper provides a theoretical basis for the engineering application of a new type of Al-Sc alloy. |
Key words: hot extrusion;flange;5B70 aluminum alloy;engineering application |