摘要
研究了0～175 MPa压力下挤压力对挤压铸造Al-Cu合金组织与性能的影响。结果表明:该合金的抗拉强度、伸长率、硬度和密度均随压力增加而增大;挤压力达到100 MPa时,抗拉强度为262.8 MPa、伸长率为9.2%,均达到峰值;之后继续增加压力,对材料性能影响不大。随挤压力增加,晶粒明显细化,二次枝晶增加,枝晶间距减小。
The microstructure and mechanical property of as-cast A1-Cu alloy solidified at 0-175 MPa pressures were studied to determine the effect of squeezing pressure on the castings. The results show that the ultimate tensile strength, elongation, hardness and density of the as-cast castings increases with the increase of applied pressure and they reach a maximum at the pressure of 100 MPa, ultimate tensile strength 262.8 MPa and elongation 9.2%. Then continues to increase pressure, the material properties have little change. The grain size and the dendrite arm space decrease and more dendrites appear with the increase of applied pressure.
出处
《铸造技术》
CAS
北大核心
2013年第5期541-543,共3页
Foundry Technology
关键词
挤压铸造
铝铜合金
力学性能
显微组织
squeezing casting
A1-Cu alloy
mechanical property
microstructure
