摘要
通过光学显微镜、差热分析仪和透射电子显微镜，对比分析了电磁铸造和连续铸造２０２４铝合金铸态及热处理态的显微组织和力学性能．电磁铸造铝锭的硬度较连续铸造铸锭提高１倍，疲劳性能提高２倍．差热分析曲线显示，电磁铸造试样具有比连续铸造高的热焓，说明其在加热过程中沉淀强化物析出较多。
The mechanical characteristics and microstructures of EMC and continuous casting (CC) 2024 aluminum alloys are analyzed not only in as-cast condition but also in aged one by optical microscope, differential scanning calorimetry and transmission electron microscopy. It is found that the hardness of EMC specimens increases one time than that of CC ingot and the fatigue property of EMC ingot is three times as high as CC one in as-cast state. The higher enthalpy peak occurring in the DSC curves expresses that the precipitation hardening phase more easily forms in EMC specimens than in CC ones during the heating process.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第4期393-396,共4页
Acta Metallurgica Sinica
基金
国家自然科学基金重大项目资助59995442~~
关键词
电磁铸造
连续铸造
铝合金
显微组织
力学性能
electromagnetic casting (EMC)
continuous casting (CC)
aluminium alloy
microstructure
mechanical characteristic
