超声和AI-5Ti-1B复合处理对工业纯铝凝固组织的影响行为与机理研究

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Studyon the Influence Behavior and Mechanism ofUltrasonicand Al-5Ti-1B Compound Treatment on the Solidification Structure of Commercial-Purity Aluminum

Han Ruiyuan， Wang Yuxin，Li Qingping， Zhang Aimin （School ofMaterials Scienceand Engineering，Henan Institute of Technology，Xinxiang 453003）

Abstract：The conventional solidification structure of cast pure aluminum is coarse.Applyingan ultrasonic field andadding grain refinersduring the solidification processcan refine the grain size，thereby improving the comprehensivepropertiesof theally.Thispaper studies theeffctsof thecombined treatmentofAl-5Ti-1Brefiner andultrasonic fieldonthesolidification processandsolidification structureofpurealuminum.Theexperimentalresults show that thecombined treatment oftheultrasonic fieldand therefiner canachievea bettergrainrefinement ffect than when they actalone.As the ultrasonic power increases，the grain size gradually decreases，and the numberof defectssuchascavitiesand porosityshrinkage also significantlydecreases.Ultrasonic fieldcanpromote theuniform distributionof heterogeneousphaseandallyingelementsinthealuminummelt from therefiner，increasing the number of effective heterogeneous nuclei of α -Al.The best combined refinement effect is obtained when theultrasonic poweris1OooW.Finaly，thecombinedactionmechanismofultrasonicfieldandtherefinerisdiscused，andits microscopic actionatomic modelisgiven.

Keywords：Purealuminum，Grainrefinement，Ultrasoundfield，Al-5Ti-1B，Atomicmechanism

1前言

空航天、高速列车、新能源汽车、架空导线及电子封装等领域中均大量应用[1-3]，是目前应用最广泛的有色金属结构材料之一。（剩余6075字）