摘要
研究了稀土Ce添加量对Al-5Ti-0.5Mg-0.15Gd中间合金微观组织和细化行为的影响,结果表明:Al-5Ti-0.5Mg-0.15Gd中间合金基体上分布着条状的TiAl_3相,径向尺寸为10-200μm,轴向尺寸为30-40μm;当Ce加入量为0.5%时,Al-5Ti-0.5Mg-0.15Gd中的TiAl_3相尺寸明显降低,并随着Ce含量增加,TiAl_3相尺寸进一步降低,当Ce加入量增至1.5%时,细化剂中的TiAl_3颗粒相变得更加细小,并在轴向上发生离断;与Al-5Ti相比,Al-5Ti-0.5Mg-0.15Gd-1.5Ce对Al-7Si合金的α-Al细化更显著,并对合金中的共晶硅也有细化作用.
Influence of Ce on the microstructure and refinement behavior of Al-5Ti -0.5Mg -0.15Gd alloy was studied. The results showed that： TiAI3 phases with shape of strip are distributed on the substrate of Al -5Ti-0.5Mg-0.15Gd master ahoy. The radial dimensions and axial dimensions of TiAl3 phases are 10 - 200μm and 30 -40 μm, respectively. After adding 0.5% Ce, the shape and size of TiAl3 phase nucleation parti- cles significantly reduce. And with increasing Ce content, the sizeof TiAl3 phase further reduces. When thecon- tent of Ceis 1.5%, the TiAl3particle phases become finer. Based on the refining effect results of α - Al phase in Al-5Ti, the refining effect of Al -5Ti -0.5Mg -0.15Gd - 1.5Cefor Al -Si alloy is significantly higher than that of Al - 5Ti alloys, and eutectic silicon is also refined.
出处
《佳木斯大学学报（自然科学版）》
CAS
2015年第5期680-683,共4页
Journal of Jiamusi University：Natural Science Edition
基金
黑龙江省应用技术研究开发计划项目(GC13A104)
