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超聲場(chǎng)作用下Mg-4Al-1Si合金凝固組織
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國(guó)家十二五科技支撐計(jì)劃項(xiàng)目 (2011BAE22B04


Solidification Structures of Mg-4Al-1Si Magnesium Alloy Treated by Ultrasonic Field
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)；國(guó)家自然科學(xué)基金項(xiàng)目 (50904018, 51004032)；中央高?；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金 (NO90409002)；中國(guó)博士后科學(xué)基金項(xiàng)目 (20100471468)；廣東省科技攻關(guān)項(xiàng)目 (2010B090500010)

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    摘要:

    采用自行研制的鎂合金熔體超聲處理裝置對(duì)Mg-4Al-1Si合金熔體進(jìn)行處理，研究超聲處理功率、超聲處理時(shí)間和超聲處理溫度對(duì)其凝固組織及相形貌的影響。結(jié)果表明：超聲處理可以顯著細(xì)化Mg-4Al-1Si合金的凝固組織，適當(dāng)提高超聲功率和處理溫度以及適當(dāng)延長(zhǎng)處理時(shí)間均可增強(qiáng)細(xì)化效果。650 ℃Mg-4Al-1Si合金熔體經(jīng)270 W超聲處理50 s可以取得較好的細(xì)化效果，平均晶粒尺寸為107 μm，為未經(jīng)超聲處理合金晶粒尺寸 (383 μm) 的28%。另外，經(jīng)超聲處理的Mg-4Al-1Si合金中Mg2Si相由未經(jīng)超聲處理時(shí)的粗大漢字狀轉(zhuǎn)變?yōu)榧?xì)小、彌散分布的顆粒狀

    Abstract:

    Mg-4Al-1Si magnesium alloy melt was treated by self-designed ultrasonic treatment equipment for magnesium alloy melt. The effects of ultrasonic power, treating time and treating temperature on solidification structures of Mg-4Al-1Si magnesium alloy were investigated. The results show that ultrasonic treatment can markedly refine the grain size of Mg-4Al-1Si magnesium alloy, and the grain size is improved by enhancing ultrasonic power, elevating treating temperature, or prolonging treating time. The grain size of Mg-4Al-1Si magnesium alloy treated by 270 W ultrasonic power for 50 s at 650 °C is very fine, 107 μm, which is only 28% as that without ultrasonic treatment (383μm). In addition, the morphology of Mg2Si in Mg-4Al-1Si alloy with ultrasonic treatment changes from coarse Chinese character shape without ultrasonic treatment into tiny granulation with evenly distribution in the matrix.

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張志強(qiáng),樂啟熾,崔建忠,劉鴻明.超聲場(chǎng)作用下Mg-4Al-1Si合金凝固組織[J].稀有金屬材料與工程,2013,42(3):574~578.[Zhang Zhiqiang, Le Qichi, Cui Jianzhong, Liu Hongming. Solidification Structures of Mg-4Al-1Si Magnesium Alloy Treated by Ultrasonic Field[J]. Rare Metal Materials and Engineering,2013,42(3):574~578.]
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  • 收稿日期:2012-02-20
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