材料工程2025，Vol.53Issue(4)：35-42,8.DOI:10.11868/j.issn.1001-4381.2024.000716
入水温度和时效参数对7075铝合金析出和力学性能的影响
Effect of water entry temperature and aging parameters on precipitation and mechanical properties of 7075 aluminum alloy
摘要
Abstract
This paper proposes a non-isothermal solid solution-forging integrated hot forming process for 7075 aluminum alloy.After solid solution treatment,the aluminum alloy is directly placed into the mold for forging,then quenched and subjected to artificial aging treatment.The influence of water entry temperature and aging parameters on the microstructure and properties of 7075 aluminum alloy is studied under this process,through the construction of a temperature-time-property(TTP)curve.Additionally,machine learning techniques are integrated to optimize and match the key process parameters.The results reveal that the nose temperature of the TTP curve is 315 ℃,and the mechanical properties of the alloy increase with the increase of water temperature after aging,a double-peak phenomenon after non-isothermal forging and aging is observed.When the inlet temperature is 380 ℃,the optimal aging parameters are 115 ℃-26 h and the peak hardness is 182HV.After training,the prediction accuracy of the BP neural network model is 94.9977％.Experimental verification of the optimal process parameters predicted by the model shows that its prediction similarity is 96.9％.Compared with traditional forging processes,this process can achieve high mechanical properties than traditional forged T6-state 7075 aluminum alloy while reducing procedural steps and energy consumption.关键词
7075铝合金/TTP/入水温度/非等温锻造/机器学习Key words
7075 aluminum alloy/TTP/water entry temperature/non-isothermal forging/machine learning分类
金属材料引用本文复制引用
牛昌海,孙倩,郑佳,庞秋..入水温度和时效参数对7075铝合金析出和力学性能的影响[J].材料工程,2025,53(4):35-42,8.基金项目
国家重点研发计划(2023YFB3307600) （2023YFB3307600）
国家自然科学基金(52075400) （52075400）
湖北省重点研发计划(2023BAB194) （2023BAB194）
湖北省自然科学基金(2023AFA069) （2023AFA069）
