温热条件对7B04铝合金性能的影响  

Effect of Thermal Conditions on Properties of 7B04 Aluminum Alloy

作　　者：刘文袆 陈福龙 王耀奇 曲海涛 韩玉杰 LIU Wenyi;CHEN Fulong;WANG Yaoqi;QU Haitao;HAN Yujie(AVIC Manufacturing Technology Institute,Beijing 100024,China;Aeronautical Key Laboratory for Plastic Forming Technologies,Beijing 100024,China;Beijing Key Laboratory for Plastic Technologies and Equipment,Beijing 100024,China)

机构地区：[1]中国航空制造技术研究院,北京100024 [2]塑性成形技术航空科技重点实验室,北京100024 [3]数字化塑性成形技术及装备北京市重点实验室,北京100024

出　　处：《兵工学报》2022年第S02期178-182,共5页Acta Armamentarii

基　　金：民机科研项目(MJ-2016-G-57、MJ-2018-G-46)。

摘　　要：针对高强铝合金航空复杂构件室温成形难问题,通过电阻炉加热及冲压成形试验探究了温热条件对7B04铝合金硬度及成形性能的影响规律,通过差示扫描量热仪及透射电镜探讨其性能变化机理。研究结果表明:7B04铝合金加热后,升温速率越快,材料硬度下降越快;在400℃以上炉温条件下加热较长时间,硬度会先降后升;在200~450℃温度范围内,7B04板材冲压成形性能随出炉温度提高而提高,加热至400℃以上出炉冲压成形效果较好,升温速率的提高可以使7B04铝合金在硬度降幅相同的情况下,达到更高的成形温度,获得更好的成形性能。To address the forming difficulty of high-strength aluminum alloy aviation complex components,the effect of thermal conditions on the hardness and formability of 7B04 aluminum alloy was explored through resistance furnace heating and stamping and forming experiments.The mechanism was investigated using differential scanning calorimetry(DSC)and transmission electron microscopy(TEM).The results showed that:the faster the heating rate,the faster the hardness of 7B04 aluminum alloy decreases;when heating at the furnace temperature 400~600℃,within several minutes,the hardness first decreased and then increased;in the range of 200~450℃of material temperature,the formability of 7B04 aluminum alloy improved with the increasing temperature;when the material temperature reached 400~450℃,the 7B04 aluminum alloy had the best forming effect.Therefore,a faster heating rate can make the 7B04 aluminum alloy reach a higher forming temperature with the same hardness drop,achieving better formability.

关 键 词：7B04铝合金 温热条件 升温速率 硬度 成形性能 时效析出相 

分 类 号：TG1[金属学及工艺—金属学]