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MgCO3、CO2、CO對AM60B合金晶粒細(xì)化的影響
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重慶大學(xué) 材料科學(xué)與工程學(xué)院

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國家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2016YFB0301100)


Effects of MgCO3 and Gaseous CO2 and CO on Grain Refinement in AM60B Alloy
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College of Material Science and Engineering,Chongqing University

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National Key Research and Development Program of China

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    摘要:

    在加入等摩爾量碳的基礎(chǔ)上，利用MgCO3、CO2和CO對760℃的AM60B合金進(jìn)行了變質(zhì)處理。結(jié)果表明： MgCO3、CO2和CO分別使AM60B的平均晶粒尺寸從213 μm減小到了116 μm、90 μm和106 μm；經(jīng)MgCO3，CO2，CO變質(zhì)處理后，AM60B合金的維氏硬度、抗拉強(qiáng)度、屈服強(qiáng)度和伸長率均有很大提升，CO2變質(zhì)后的AM60B合金力學(xué)性能最好，CO次之，MgCO3最差。基于SEM、EDS以及XRD分析數(shù)據(jù)，MgCO3、CO2及CO氣體具有相同的變質(zhì)機(jī)理，即主要是因?yàn)榧尤脒@兩種含碳變質(zhì)劑后，熔體中的Al和C結(jié)合生成了Al4C3異質(zhì)形核核心。

    Abstract:

    Based on the equal addition amount of carbon, the effects of MgCO3, CO2 and CO on grain refinement in AM60B alloy were investigated. The results indicated that the average grain size of AM60B alloy reduced from 213μm to 116μm, 90μm and 106μm respectively due to the addition of MgCO3, CO2 and CO. Also, the Vickers hardness, tensile strength, yield strength and elongation of AM60B alloy inoculated by MgCO3, CO2 and CO were all improved in some degree, moreover, AM60B alloy treated by CO2 have the best mechanical properties, followed by CO and MgCO3 in sequence. In addition, supported by SEM, EDS and XRD, the observed Al4C3 particles as a result of the addition of MgCO3, CO2 and CO should be responsible for the grain refinement of treated AM60B alloy.

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引用本文

劉艷,龍思遠(yuǎn),袁穎,劉青,游國強(qiáng). MgCO3、CO2、CO對AM60B合金晶粒細(xì)化的影響[J].稀有金屬材料與工程,2019,48(1):190~196.[Liu Yan, Long Siyuan, Yuan Ying, Liu Qing, You Guoqiang. Effects of MgCO3 and Gaseous CO2 and CO on Grain Refinement in AM60B Alloy[J]. Rare Metal Materials and Engineering,2019,48(1):190~196.]
DOI：10.12442/j. issn.1002-185X.20170447

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  • 收稿日期:2017-05-26
  • 最后修改日期:2017-11-28
  • 錄用日期:2017-12-18
  • 在線發(fā)布日期: 2019-02-18
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