铸造2017，Vol.66Issue(8)：882-887,6.
ZL205A上臂铸件低压充型工艺设计
Design of Low Pressure Filling Process for ZL205A Upper Arm Casting
摘要
Abstract
The ZL205A alloy is a high strength and tough aluminum-copper material, which can be used as medium load bearing parts for aerospace and other military equipment field after the T6 heat treatment. In this paper, four different low-pressure solidification forming processes of ZL205A upper arm casting are designed, the runner cross-section area ratio is selected to 1:1.8:4.4, combining with the 20 mm/s and 40 mm/s of liquid rise and filling speed, together with 25 kPa and 30 kPa of liquid rise and filling pressure, an order filling sequence from bottom to top and solidification process from top to bottom are achieved. The average tensile strength, yield strength and elongation of T6 bulk specimen are 484 MPa, 354.5 MPa and 6.9％respectively, lots of Al2Cu and Al6Mn precipitate strengthening phases distribute nearby the grain boundaries diffusely after the aging process. The dimple rupture appears as the main fracture mechanism, accompanying with some intergranular fracture zone.关键词
ZL205A合金/凝固工艺/低压充型/力学性能/微观组织Key words
ZL205A alloy/solidificationprocess/lowpressurefilling/mechanicalproperties/microstructure分类
矿业与冶金引用本文复制引用
樊振中,阮磊,杨天杰,孙刚,王胜强..ZL205A上臂铸件低压充型工艺设计[J].铸造,2017,66(8):882-887,6.基金项目
中国航发北京航空材料研究院新产品研发基金(KJSC160206). （KJSC160206）
