精密成形工程
精密成形工程
정밀성형공정
METAL FORMING TECHNOLOGY
2011年
5期
47-49
,共3页
于浩%程兆虎%钱怡君
于浩%程兆虎%錢怡君
우호%정조호%전이군
超声波处理%Al-20％Si合金%微观组织
超聲波處理%Al-20％Si閤金%微觀組織
초성파처리%Al-20％Si합금%미관조직
ultrasonic treatment%Al-20％Si alloy%microstructure
采用高能超声波对Al-20％Si合金进行处理，控制Al-20％Si合金熔体温度在620～680℃，研究合金组织随超声波导入时熔体初始温度的变化规律。实验表明，随着导入超声波时熔体温度的升高，初晶硅形貌由粗大的板片状逐渐变成细小的颗粒状，超声波处理熔体的温度控制在660℃左右时，初晶硅的组织细小、圆整度高、分布均匀。
採用高能超聲波對Al-20％Si閤金進行處理，控製Al-20％Si閤金鎔體溫度在620～680℃，研究閤金組織隨超聲波導入時鎔體初始溫度的變化規律。實驗錶明，隨著導入超聲波時鎔體溫度的升高，初晶硅形貌由粗大的闆片狀逐漸變成細小的顆粒狀，超聲波處理鎔體的溫度控製在660℃左右時，初晶硅的組織細小、圓整度高、分佈均勻。
채용고능초성파대Al-20％Si합금진행처리，공제Al-20％Si합금용체온도재620～680℃，연구합금조직수초성파도입시용체초시온도적변화규률。실험표명，수착도입초성파시용체온도적승고，초정규형모유조대적판편상축점변성세소적과립상，초성파처리용체적온도공제재660℃좌우시，초정규적조직세소、원정도고、분포균균。
Influence rules of the mierostructures of Al-20%Si alloy treated by high-intensity ultrasonic in the starting tern perature ranges between 620 ℃ and 680 ℃ were studied. The mechanism of microstructural refinement for the ultrasonic treated alloy was also discussed. With the rise of starting temperature the morphology of primary crystal silicon changed by a thick sheet into small particles gradually. The results indicated that finer primary phase could be obtained when the starting tempera ture was at about 660℃.
