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Al-Si/Al-Mn復(fù)合連鑄坯料均勻化熱處理研究
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浙江省自然科學(xué)基金資助（LQ12E01002）；寧波市自然科學(xué)基金資助（2012A610059）


Uniform Heat Treatment of Direct Chill Continuous Casting Al-Si/Al-Mn Clad Slab
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    摘要:

    對(duì)Al-Si/Al-Mn復(fù)合連鑄坯料通過(guò)不同熱處理溫度和保溫時(shí)間進(jìn)行了均勻化熱處理研究，并對(duì)均勻化熱處理后的微觀組織、硬度和微觀成分分布進(jìn)行了分析。結(jié)果表明：Al-Si/Al-Mn復(fù)合連鑄坯料經(jīng)過(guò)均勻化熱處理后，Al-Si合金一側(cè)的微觀組織由粗大的網(wǎng)狀結(jié)構(gòu)轉(zhuǎn)化成點(diǎn)狀或短棒狀混合組織，Al-Mn合金一側(cè)微觀組織趨于均勻一致，復(fù)合界面處的界限更加明顯；均勻化熱處理后Al-Si合金硬度有明顯下降，但對(duì)Al-Mn合金的影響較??；微觀元素分布分析表明均勻化熱處理后溶質(zhì)元素更加均勻，在復(fù)合界面處溶質(zhì)元素出現(xiàn)互擴(kuò)散現(xiàn)象，特別是Mg元素?cái)U(kuò)散后復(fù)合界面模糊；綜合分析表明，Al-Si/Al-Mn復(fù)合連鑄坯料在480 ℃保溫15 h后效果最佳。

    Abstract:

    The uniform heat treatment of direct chill continuous casting Al-Si/Al-Mn clad slab was investigated with different temperatures and time, and the microstructure, hardness and solute distribution of the uniform heat treated samples was studied. The results show that the coarse net-work compounds of Al-Si alloy change into spot and short-bar compounds, the Mn element distribution is more uniform, and the interface of Al-Si/Al-Mn clad slab is clearer because of element solution. The hardness of Al-Si alloy is reduced after the treatment, but the hardness of Al-Mn alloy is not sensitive to temperatures and time of the uniform heat treatment. The elemental EPMA mappings show that the distribution of solute elements are more uniform, and elements are diffused on the interface of Al-Si/Al-Mn clad slab, especially Mg element becomes not obvious on the interface after uniform heat treatment. It can be concluded that the best Al-Si/Al-Mn clad slab is obtained when the uniform heat treating temperature is 480 oC and the time is 15 h.

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任 政,張 瀟,朱秀榮,成建國(guó),連付奎,徐國(guó)輝,徐 英,趙寶榮. Al-Si/Al-Mn復(fù)合連鑄坯料均勻化熱處理研究[J].稀有金屬材料與工程,2014,43(4):986~989.[Ren Zheng, Zhang Xiao, Zhu Xiurong, Cheng Jianguo, Lian Fukui, Xu Guohui, Xu Ying, Zhao Baorong. Uniform Heat Treatment of Direct Chill Continuous Casting Al-Si/Al-Mn Clad Slab[J]. Rare Metal Materials and Engineering,2014,43(4):986~989.]
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  • 收稿日期:2013-04-27
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  • 在線(xiàn)發(fā)布日期: 2014-07-30
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