Effect of Thermal Conditions on Properties of 7B04 Aluminum Alloy

doi:10.12382/bgxb.2022.B007

Abstract

Abstract: 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.

Key words: 7B04aluminumalloy, thermalconditions, heatingrate, hardness, formability, agingprecipitates

CLC Number:

LIU Wenyi, CHEN Fulong, WANG Yaoqi, QU Haitao, HAN Yujie. Effect of Thermal Conditions on Properties of 7B04 Aluminum Alloy[J]. Acta Armamentarii, 2022, 43(S2): 178-182.

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