MgCO_3、CO_2、CO对AM60B合金晶粒细化的影响
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摘要
在加入等摩尔量碳的基础上,利用MgCO_3、CO_2和CO对760℃的AM60B合金进行了变质处理。结果表明:MgCO_3、CO_2和CO分别使AM60B的平均晶粒尺寸从213μm减小到了116,90和106μm;经MgCO_3,CO_2,CO变质处理后,AM60B合金的维氏硬度、抗拉强度、屈服强度和伸长率均有很大提升,CO_2变质后的AM60B合金力学性能最好,CO次之,MgCO_3最差。基于SEM、EDS以及XRD分析数据,MgCO_3、CO_2及CO气体具有相同的变质机理,即主要是因为加入这2种含碳变质剂后,熔体中的Al和C结合生成了Al4C3异质形核核心。
Based on the equal addition amount of carbon, the effects of MgCO_3, CO_2 and CO on grain refinement of AM60B alloy wereinvestigated. The results indicate that the average grain size of AM60B alloy decreases from 213 μm to 116, 90 and 106 μm by the additionof MgCO_3, CO_2 and CO, respectively. Also, the Vickers hardness, tensile strength, yield strength and elongation of AM60B alloyinoculated by MgCO_3, CO_2 and CO are all improved in some degree; moreover, CO_2 treated AM60B alloy has the best mechanicalproperties, followed by the CO treated and MgCO_3 treated in sequence. In addition, supported by SEM, EDS and XRD, the observed Al_4C_3 particles as a result of the addition of MgCO_3, CO_2 and CO should be responsible for the grain refinement of treated AM60B alloy.
Based on the equal addition amount of carbon, the effects of MgCO_3, CO_2 and CO on grain refinement of AM60B alloy wereinvestigated. The results indicate that the average grain size of AM60B alloy decreases from 213 μm to 116, 90 and 106 μm by the additionof MgCO_3, CO_2 and CO, respectively. Also, the Vickers hardness, tensile strength, yield strength and elongation of AM60B alloyinoculated by MgCO_3, CO_2 and CO are all improved in some degree; moreover, CO_2 treated AM60B alloy has the best mechanicalproperties, followed by the CO treated and MgCO_3 treated in sequence. In addition, supported by SEM, EDS and XRD, the observed Al_4C_3 particles as a result of the addition of MgCO_3, CO_2 and CO should be responsible for the grain refinement of treated AM60B alloy.
引文
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[6]Chen Tijun,Wang Ruiquan,Huang Haijun et al.Transactions of Nonferrous Metals Society of China[J],2012,22(7):1533
[7]Wang Ruiquan(王瑞权),Zhang Dahua(张大华),Liu Eryong(刘二勇)et al.Foundry Engineering(铸造工程)[J],2010,34(1):19
[8]Wang Zhaohui,Kang Yonglin,Zhao Hongjin et al.Transactions of Nonferrous Metals Society of China[J],2006,16(s3):1851
[9]Wang Xinxin(王欣欣),Yuan Sen(袁森),Zeng Shufeng(曾书峰)et al.Hot Working Technology(热加工技术)[J],2008,37(13):17
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[13]Du J,Wang M,Zhou M et al.Journal of Alloys&Compounds[J],2014,592(14):313
[14]Han G,Liu X.Journal of Alloys&Compounds[J],2009,487:194
[15]Subramanian J,Guan K C,Kuma J et al.Journal of Materials Processing Technology[J],2011,211(8):1416
[16]Gao Ting(高挺).Thesis for Master Degree(硕士论文)[D].Nanchang:Nanchang University,2011
[17]Li Cong(李聪),Long Siyuan(龙思远),Yang Huaide(杨怀德)et al.Ordnance Material Science and Engineering(兵器材料科学与工程)[J],2013(1):121
[18]Kim Y M,Wang L,You B S.Journal of Alloys&Compounds[J],2010,490(1-2):695
[19]Jin Q,Eom J P,Lim S G et al.Scripta Materialia[J],2005,52(5):421