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将基于铝合金析出动力学的淬火因子分析(QFA)方法与有限元分析方法相结合,先计算了7050铝合金厚板喷淋淬火过程的淬火敏感因子,然后对末端淬火试样的硬度进行了有限元模拟,分析了板厚和喷水压力对淬火硬度的影响,最后用末端淬火试验对模拟结果进行了验证。结果表明:喷水压力的下降会造成淬火后合金板硬度的下降,板的厚度越大,喷水压力的影响程度越弱;对于厚度较薄(50mm)的板材,淬透效果与喷水压力密切相关,喷水压力从500kPa降低至10kPa时,其心部硬度会下降1.8%;喷水压力对厚度超过100mm的板材淬透效果的影响有限,喷水压力从500kPa降低至10kPa时,心部硬度的下降小于0.5%。
Based on the analysis of quenching factor analysis (QFA) based on aluminum alloy precipitation kinetics and the finite element analysis method, the quenching sensitivity factor of spray quenching process of 7050 aluminum alloy plate was calculated first, then the hardness of the end quenched sample Finite element simulation was used to analyze the influence of plate thickness and water pressure on the quench hardness. Finally, the simulation results were verified by the end quench test. The results show that the decrease of water jet pressure will cause the hardness of the quenched alloy plate to decrease. The greater the thickness of the plate, the weaker the influence of water pressure. For the thinner plate (50mm), the hardenability and water pressure Is closely related to the water pressure drops from 500kPa to 10kPa, the core hardness will drop 1.8%; water pressure on the thickness of more than 100mm plate hardenability effect is limited, the water pressure drops from 500kPa to 10kPa, the heart The decrease in hardness is less than 0.5%.