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超聲波作用下雙輥鑄軋鎂合金板帶材的力學(xué)性能和成形能力
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中南大學(xué)材料科學(xué)與工程學(xué)院,中南大學(xué)材料科學(xué)與工程學(xué)院,中南大學(xué)材料科學(xué)與工程學(xué)院,中南大學(xué)材料科學(xué)與工程學(xué)院,中南大學(xué)材料科學(xué)與工程學(xué)院,中南大學(xué)材料科學(xué)與工程學(xué)院,中南大學(xué)材料科學(xué)與工程學(xué)院

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Mechanical properties and formability of ultrasonic treated twin roll casting magnesium alloy sheet
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Central South University,Central South University，School of Materials Science and Engineering,Central South University，School of Materials Science and Engineering,Central South University，School of Materials Science and Engineering,Central South University，School of Materials Science and Engineering,Central South University，School of Materials Science and Engineering,Central South University，School of Materials Science and Engineering

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    摘要:

    研究了超聲波對(duì)雙輥鑄軋的Mg-3wt%Al-1%Zn-0.8?-0.3%Mn合金板帶材組織和性能的影響。實(shí)驗(yàn)結(jié)果表明：超聲波輔助鎂合金的鑄軋可以提高鎂合金帶材的強(qiáng)度、延伸率和極限深拉比值，在250℃鎂合金帶材的極限深拉比值可以達(dá)到2.16。這些鎂合金力學(xué)性能和成形能力的提升是由于超聲波鑄軋過(guò)程中，超聲波可以細(xì)化鎂基體的晶粒尺寸，并同時(shí)對(duì)合金中的Mg17(Al,Zn)12和AlCeMn相起到變質(zhì)作用。當(dāng)超聲波強(qiáng)度達(dá)到800W時(shí)，鎂基體的晶粒尺寸可以從150μm細(xì)化到30μm，而且針狀的AlCeMn相可以被變質(zhì)成球狀，從而提高了鎂合金的力學(xué)性能和成形能力。

    Abstract:

    The effects of ultrasonic treatment on the microstructure and properties of twin roll casting Mg-3wt%Al-1%Zn-0.8?-0.3%Mn alloy strip were studied in this investigation. The results show that the ultrasonic treatment contributes to the improvement of strength, elongation and limiting drawing ratio of alloy strip. The highest limiting drawing ratio of the sheet is 2.16 at 250℃. The improvement of properties is attributed to the refinement of α-Mg grains and the modification of Mg17(Al,Zn)12 and AlCeMn phases by ultrasonic treatment during the twin roll casting process. The grain size of the twin roll casting strip is refined from 150 μm to less than 30 μm with the ultrasonic treatment power of 800 W, and the needle-like shape of the AlCeMn phase is modified to a globular shape.

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余琨,熊漢青,戴翌龍,滕飛,范素峰,喬雪巖,文利.超聲波作用下雙輥鑄軋鎂合金板帶材的力學(xué)性能和成形能力[J].稀有金屬材料與工程,2017,46(3):622~626.[Yu Kun, XIONG Hanqing, DAI Yilong, TENG Fei, FAN Sufeng, QIAO Xueyan, WEN Li. Mechanical properties and formability of ultrasonic treated twin roll casting magnesium alloy sheet[J]. Rare Metal Materials and Engineering,2017,46(3):622~626.]
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  • 收稿日期:2014-12-06
  • 最后修改日期:2015-11-04
  • 錄用日期:2015-11-18
  • 在線發(fā)布日期: 2017-05-18
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