徐春杰,代盼,屠涛,余玲,张忠明,王锦程

• 1:西安理工大学材料科学与工程学院
• 2:西北工业大学凝固技术国家重点实验室

摘要(Abstract)：

采用Ar气保护制备了Mg-5Sn-1Si(质量分数,%)合金,并研究了合金的铸态组织和在480℃固溶处理及180℃和280℃不同时效热处理对合金组织中析出相演变的影响及组织与硬度的关系。结果表明,合金铸态组织由α-Mg、共晶Mg2Si、共晶Mg2Sn三相组成;经480℃固溶处理后Mg2Sn相完全固溶,粗大的Mg2Si相得到少量球化;时效处理过程中Mg2Si相得到球化。在180℃时效时,Mg2Sn无沉淀析出,硬度较低,时效保温24 h仅为24.1 HV。在280℃时效时,细小的Mg2Sn相弥散析出并使合金的硬度明显升高,时效保温18 h达到峰值硬度47.6 HV,并随时间的延长出现过时效现象。280℃时效初期,组织中形成较宽的无析出带(PFZ),随着时效时间的延长无析出带PFZ消失。

关键词(KeyWords)： 镁合金;微观组织;固溶;时效硬化;无析出带

Abstract:

Keywords:

基金项目(Foundation): 陕西省国际科技合作重点项目计划资助(2013KW16);; 陕西省教育厅科研计划项目资助(2013JK0914);; 西北工业大学凝固技术国家重点实验室开放课题(SKLSP201115);; 西安理工大学科学研究计划项目(101-210911)

作者(Author): 徐春杰,代盼,屠涛,余玲,张忠明,王锦程

DOI: 10.13289/j.issn.1009-6264.2013.10.017

参考文献(References)：

• [1]Aghion E,Bronfin B.Magnesium alloys development towards the 21st century[J].Materials Science Forum,2000,350-351(1):19-28.
• [2]Luo A A.Recent magnesium alloy development for elevated temperature applications[J].International Materials Reviews,2004,49(1):13-30.
• [3]Luo A,Pekguleryuz M O.Review cast magnesium alloys for elevated temperature applications[J].Journal of Materials Science,1994,29(20):5259-5271.
• [4]Zhang Xiaoping,Chen Yungui,Xiao Sufen,et al.Microstructure,tensile properties and compressive creep resistance of Mg-(5-8.5)%Sn-2%La alloys[J].Trans Nonferrous Met Soc China,2008,18(S1):299-305.
• [5]贾树卓,徐春杰,郑水云,等.热处理对原位自生Mg2Si/Mg-Al基复合材料组织与性能的影响[J].材料热处理学报,2006,27(6):27-30.JIA Shu-zhuo,XU Chun-jie,ZHENG Shui-yun,et al.Influence of solution heatreatment and ageing on microstructure and properties of in-situ Mg2Si/Mg-Al matrix composite[J].Transactions of Materials and Heat Treatment,2006,27(6):27-30.
• [6]Yang Jie,Xiao Wenlong,Wang Lidong,et al.Influences of Gd on the microstructure and strength of Mg-4.5Zn alloy[J].Materials Characterization,2008,59(11):1667-1674.
• [7]Fu J W,Yang Y S.Formation of the solidified microstructure in Mg-Sn binary alloy[J].Journal of Crystal Growth,2011,322(1):84-90.
• [8]魏尚海,陈云贵,刘红梅,等.Mg-5wt%Sn合金铸态和时效态的高温蠕变性能[J].材料热处理学报,2008,29(3):104-107.WEI Shang-hai,CHEN Yun-gui,LIU Hong-mei,et al.Compressive creep behavior of as-cast and aging-treated Mg-5wt%Sn alloy[J].Transactions of Materials and Heat Treatment,2008,29(3):104-107.
• [9]Kim B H,Jeon J J,Park K C,et al.Microstructural characterization and mechanical properties of Mg-xSn-Al-Zn alloys[J].Academy of Materials and Manufacturing Engineering,2008,30(2):93-96.
• [10]Shi B Q,Chen R S,Ke W.Solid solution strengthening in polycrystals of Mg-Sn binary alloys[J].Journal of Alloys and Compounds,2011,509(7):3357-3362.
• [11]Chen Dong,Ren Yu-ping,Guo Yun,et al.Microstructures and tensile properties of as-extruded Mg-Sn binary alloys[J].Trans Nonferrous Met Soc China,2010,20(7):1321-1325.
• [12]刘红梅,陈云贵,唐永柏,等.热处理对Mg-5wt%Sn合金组织与显微硬度的影响[J].材料热处理学报,2007,28(1):92-95.LIU Hong-mei,CHEN Yun-gui,TANG Yong-bai,et al.Effects of heat treatment on microstructure and microhardness of Mg-5wt%Sn alloy[J].Transactions of Materials and Heat Treatment,2007,28(1):92-95.
• [13]Li G H,Gill H S,Varin R A.Magnesium suicide intermetallic alloys[J].Metallurgical and Materials Transactions A,1993,24(11):2383-2391.
• [14]Blum W,Zhang P,Watzinger B,et al.Comparative study of creep of the die cast Mg alloys AZ91,AS21,AS41,AM60 and AE42[J].Materials Science and Engineering A,2001,319-321:735-740.
• [15]徐春杰,马涛,屠涛,等.石英原位自生制备Mg2Si增强Mg-Si合金及其显微组织[J].兵器材料科学与工程,2012,35(1):36-38.XU Chun-jie,MA Tao,TU Tao,et al.Preparation and microstructure of in situ Mg2Si/Mg-Si alloy[J].Ordnance Material Science and Engineering,2012,35(1):36-38.
• [16]Junga I H,Kangb D H,Parka W J,et al.Thermodynamic modeling of the Mg-Si-Sn system[J].Computer Coupling of Phase Diagrams and Thermochemistry,2007,31(2):192-200.
• [17]黄正华,郭学锋,张忠明,等.Si对AZ91D镁合金显微组织与力学性能的影响[J].材料工程,2004(6):28-32.HUANG Zheng-hua,GUO Xue-feng,ZHANG Zhong-ming,et al.Effects of Si on microstructure and mechanical properties of AZ91D magnesium alloy[J].Journal of Materials Engineering,2004(6):28-32.
• [18]Michel Perez.Gibbs-Thomson effects in phase transformations[J].Scripta Materialia,2005,8(52):709-712.
• [19]Azat Yu Galimov,Onkar Sahni,Richard T Lahey Jr.Parallel adaptive simulation of a plunging liquid jet[J].ACTA Mathematical Sciatica,2010,30(2):522-538.
• [20]Buha J.Reduced temperature(22-100℃)ageing of an Mg-Zn alloy[J].Materials Science and Engineering A,2008,492:11-19.
• [21]Planken J Deruyttere.Precipitation hardening in magnesium-tin alloys[J].Journal of Materials Science,1969,4(6):927-929.
• [22]ZHANG Min,ZHANG Wen-zheng,ZHU Guo-zhen,et al.Crystallography of Mg2Sn precipitates in Mg-Sn-Mn-Si alloy[J].Trans Nonferrous Met Soc China,2007,17(6):1428-1432.
• [23]WEI Shang-hai,CHEN Yun-gui,TANG Yong-bai,et al.Compressive creep behavior of as-cast and aging-treated Mg-5wt%Sn alloys[J].Materials Science and Engineering A,2008,492:20-23.
• [24]赵乃勤,杨志刚,冯运莉.合金固态相变[M].长沙:中南大学出版社,2008:296-301.

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