Zr含量对2519铝合金组织与力学性能的影响

Effect of Zr Content on Microstructures and Properties of 2519 Aluminum Alloy

研究了锆含量对 2 5 19铝合金的组织与力学性能的影响。结果表明 ,锆有利于细化合金铸态及再结晶组织 ,并随锆含量的增加 ,合金铸态及再结晶组织逐渐细化 ,合金的强度、硬度及伸长率逐渐升高 ;但当锆含量大于0 19% (质量分数 ,下同 )时 ,合金的铸态组织中有粗大的初生Al3Zr相产生 ,合金的强度、硬度及伸长率降低。2 5 19铝合金适宜的锆含量为 0 19%。

The effect of Zr content on microstructures and properties of 2519 aluminum alloy was researched.The results show that the addition of zirconium is favorable for grain refinement of the as-cast and recrystallized alloys.The mechanical properties are improved with the addition of zirconium.While for excessive addition of zirconium,the strength,hardness and elongation of the alloy decline due to the generation of massive primary Al_3Zr phase.The suitable content of zirconium in 2519 aluminum alloy is 0.19wt%.