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摘要：
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通过 2A12液态铝合金分层浇注 -累积液锻成形大高径比工艺试验、扫描电镜和Instron万能材料试验机等手段 ,研究了成形的大高径比制件界面处的力学性能 ,总结除了工艺参数对界面处的力学性能的影响。研究结果表明 :采用分层浇注 -累积液锻成形大高径比制件的方法是完全可行的 ;浇注温度、模具预热温度、施加的压力、浇注层数和加压前停留时间是影响界面处力学性能的主要工艺参数 ;浇注温度为 74 0℃、模具预热温度为 4 80℃、施加的压力为 5 0 0kN (比压为2 18 4MPa)、浇注层数为 3层、加压前停留时间为 5s时界面处的力学性能最好 ,微观组织具有等轴晶特点
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Based on the experiment of laminated pouring and accumulated liquid forging of 2A12 aluminum alloy, Interface mechanical properties of formed component with large ratio of altitude and diameter were investigated by means of SEM and Instron materials drawing equipment.The results show that it is feasible to apply the method of laminated pouring and accumulated liquid forging into forming components with large ratio of altitude and diameter.Pouring temperature, reheated temperature of die, pressure, pouring layers and standing time are important technological parameters that influences on the mechanic properties.When pouring temperature is 740℃, reheated temperature of die is 480℃, pressure is 500kN ( specific pressure is 218.4MPa), pouring layers is three layers and standing time is 5s, the mechanical properties of interface is very good, microstructure is equiax crystal.
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基金项目：
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中国国家自然科学基金资助 ,项目号为 50 0 750 1 8
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作者简介：
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参考文献：
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