原位反应生成TiB_2粒子及其对Al-Si-Mg合金力学性能的影响  

In-situ Reaction Formation of TiB_2 Particles and the Effect of TiB_2 Particles on the Mechanical Properties of Al-Si-Mg Alloy

作　　者：崔庆玲 王明星[1] 庞金辉[1] 刘志勇[1] 刘忠侠[1] 宋天福[1] 

机构地区：[1]郑州大学物理工程学院教育部材料物理重点实验室,河南郑州450052

出　　处：《铸造技术》2009年第7期888-891,共4页Foundry Technology

摘　　要：通过向电解Al-Ti合金熔体中加入Al-B中间合金,制备了具有不同TiB2粒子含量的Al-Si-Mg合金。分析了这种原位反应法制备含TiB2粒子铝合金的可行性,并对制备合金样品的力学性能进行了试验研究。结果表明,电解Al-Ti合金熔体中的自由钛原子与Al-B中间合金溶解释放出的硼原子能自发反应生成稳定的TiB2粒子,且生成的TiB2粒子对合金的力学性能有明显影响。随TiB2粒子含量增加,Al-Si-Mg合金的强度虽有所下降但塑性却大幅度提高,综合力学性能有所改善。The Al-Si-Mg alloys with different amount of TiB2 particle were prepared by adding Al-B master alloy to the melt of the electrolytic Al-Ti alloy. The feasibility of in situ reaction formation of the Al alloy containing TiB2 particle was discussed. And mechanical properties of prepared alloys were also investigated. The experimental results show that the free titanium atoms from the electrolytic Al-Ti alloy can react with the boron atoms from Al-B master alloy to form stable TiB2 particles in the melt, and the formed TiB2 particles have a significant effect on the mechanical properties of the alloy. With the increasing of TiB2 particles, the strength of the Al-Si-Mg alloy is decreased, but the plasticity is increased significantly. And the comprehensive mechanical property of alloy is improved.

关 键 词：电解Al-Ti合金 原位反应 TiB2粒子 力学性能 

分 类 号：TG131[一般工业技术—材料科学与工程]