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首页> 外文期刊>鑄造工程學刊 >Effect of Homogenization Treatment on the Microstructures and Mechanical Properties of 7050 Al Alloy
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Effect of Homogenization Treatment on the Microstructures and Mechanical Properties of 7050 Al Alloy

机译：均质化处理对7050铝合金微观结构和力学性能的影响

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In this study the microstructures and mechanical properties of 7050 Al alloys subjected to 2-step and 3-step homogenization treatments were investigated. In the beginning, a two-stage homogenization treatment of 450°C/12h + 470°C/24h was carried out on the 7050 alloy casting. Followed, the second stage temperature of the homogenization treatment was increased to 480°C, and the effect of increasing the second stage temperature upon the residual S phase was examined. In addition, the effect of two-step (450°C/12h+480°C/24h) and three-step (300°C/12h +450°C/12h+480°C/24h) homogenization treatment on microstructures was examined on the 7050 alloy. The homogenized 7050 alloy were hot rolled (430°C/80% thickness) and T6 treated (480°C/1h+120°C/24h) for microstructures and mechanical properties study. For recrystallization temperature study, the homogenized 7050 alloy were hot rolled (430°C/80% thickness reduction) and cold rolled (room temperature/50% thickness reduction). The influence of homogenization treatment on recrystallization temperature were investigated. The experimental results show that increasing the second-stage homogenization temperature of 7050 alloy castings (from 470°C to 480°C) can effectively reduce the amount and the size of S phase partials. After hot rolling and T6 treatment the tensile strengths of 7050 alloy-T6 homogenized at different temperatures was found to be 577 MPa (470°C) and 583 MPa (480°C), respectively, proving the reduction of S phase particles improve the mechanical properties of 7050 series alloys. After the two-step and three-step homogenization treatment, the recrystallization temperatures of 7050 alloys were found to be 500°C, the recrystallization temperatures were unchanged. The tensile strength of 7050 alloy are 583 MPa (two-step) and 592 MPa (three-step).
机译：在该研究中，研究了经过2步和3步均质化处理的7050 al合金的微观结构和机械性能。在开始，在7050合金铸件上进行了450℃/ 12h + 470℃/ 24h的两级均匀化处理。其次，均质化处理的第二阶段温度升至480℃，检查了在残留的S相时增加第二级温度的效果。另外，两步（450℃/ 12h + 480℃/ 24小时）的效果和三步（300℃/ 12h + 450℃/ 12h + 480℃/ 12h + 480℃/ 24h）微观结构的均质处理在7050合金上检查。均质化7050合金热轧（430℃/ 80％厚度）和T6处理（480℃/ 1H + 120℃/ 24h），用于微观结构和机械性能研究。对于重结晶温度研究，均质化的7050合金热轧（430℃/ 80％的厚度降低）和冷轧（室温/ 50％厚度降低）。研究了均质化处理对再结晶温度的影响。实验结果表明，增加7050合金铸件（470°C至480°C）的第二阶段均化温度可以有效地降低S相位的量和尺寸。在热轧和T6处理后，分别在不同温度下均化的7050合金-T6的拉伸强度分别为577MPa（470℃）和583MPa（480℃），证明了S相颗粒的减少改善了机械7050系列合金的性能。在两步和三步均质化处理之后，发现7050合金的再结晶温度为500℃，再结晶温度不变。抗拉强度为7050合金为583MPa（两步）和592MPa（三步）。

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