In this paper,the process factors affecting the pre-aging of 80mm thick plate of 7050 aluminum alloy are studied by Box-Behnken response surface method.The results show that the regression model has a good fit,and the optimal process is modified according to the actual production conditions(pre-aging temperature 120℃,holding time 24h,heating rate 1℃/min).the hardness of the sheet after pre-aging with the modified process is 189.2HV and the conductivity 30.83%IACS,meeting the target requirements.
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