Temperature field simulation for solid solution treatment of 7075 aluminum alloy support swing arm forging for automobile

doi:10.13251/j.issn.0254-6051.2020.10.041

Abstract

Abstract: Temperature field of 7075 aluminum alloy automobile support swing arm forging in solid solution treatment process was simulated by ABAQUS finite element software, and the temperature field distributions of the forging under different heating ways, transfer time and quenching water temperatures were obtained. The results show that when heating up along with the furnace, the time required for the forging to reach the preset temperature is 112.1 min and the maximum temperature difference is 4.8 ℃; when the forging is loaded after the furnace reaches the preset temperature, the required time and the maximum temperature difference are 71.2 min and 10.4 ℃, respectively. When the transfer time is 3, 3.5 and 4 min, the temperature of the fastest cooling part in the forging decreases to 384.0, 375.9 and 367.8 ℃ respectively, so the transfer time is finally selected as less than 3.5 min. When quenched in 25 ℃ water, the cooling time is 95 s, the average cooling rate of the fastest and the slowest parts of the forging passing through the quench temperature sensitive zone is 782.8 and 19.1 ℃/s respectively, and the maximum temperature difference is 237.6 ℃. When quenched in 80 ℃ water, the cooling time is 56 s, and the average cooling rate of the fastest and slowest parts of the forging passing through the quenching temperature sensitive zone is 587.4 and 16.8 ℃/s respectively, and the maximum temperature difference is 216.0 ℃.

Key words: 7075 aluminum alloy, solution treatment, numerical simulation, temperature field

CLC Number:

TG156.1

Yang Hongbin, Bu Hengyong, Li Mengnie. Temperature field simulation for solid solution treatment of 7075 aluminum alloy support swing arm forging for automobile[J]. Heat Treatment of Metals, 2020, 45(10): 212-217.

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