张甜甜;崔红卫;余晖;贾秋荣;崔晓丽;陈洪美;

• 1:山东理工大学材料科学与工程学院
• 2:河北工业大学材料科学与工程学院
• 3:江苏科技大学江苏省先进焊接技术重点实验室

摘要(Abstract)：

基于对高强镁合金的迫切需求,选用Sm作为合金化元素添加到ZK30镁合金中。采用真空感应熔炼炉制备ZK30-x Sm镁合金(x=0%,1%,2%,3%,4%,质量分数),研究了不同含量的Sm对铸态ZK30镁合金微观组织和力学性能的影响。通过OM,SEM,EDS,XRD观察和分析了合金的微观形貌和组织成分,并对材料进行了拉伸试验和硬度测试。结果表明:加Sm镁合金主要由α-Mg基体和Mg_(41)Sm_5相组成,并且合金组织由树枝晶转变为细小的等轴晶;合金的抗拉强度σ_b,屈服强度σ_(0. 2)和伸长率δ随着Sm含量的增加先升高后降低,当Sm含量为1%时,σ_b,σ_(0.2)和δ均达到最大值,分别为250. 4,109. 0 MPa和14. 4%;合金的硬度也在Sm含量为1%时,达到最大值59. 85 kgf·mm~(-2)。但过量的Sm恶化组织,降低了性能。添加元素Sm后合金性能的提高主要归因于细晶强化、固溶强化和析出强化的共同作用。

关键词(KeyWords)： ZK30镁合金;Sm;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 山东理工大学博士科研启动经费资助项目(4041-414014)

作者(Author): 张甜甜;崔红卫;余晖;贾秋荣;崔晓丽;陈洪美;

Email:

DOI:

参考文献(References)：

• [1] Xia X Y,Sanaty Z A,Zhang C,Luo A A,Zeng X Q,Austin Chang Y,Stone,Donald S. Thermodynamic modeling and experimental investigation of the magnesium-zinc-samarium alloys[J]. J. Alloys Compd.,2014,593:71.
• [2] Li K J,Li A Q,Jing X T,Chen J,Zhang X Y,Zhang Q. Effects of Sm addition on microstructure and mechanical properties of Mg-6Al-0. 6Zn alloy[J]. Scripta Mater.,2009,60(12):1101.
• [3] Li B B,Dong J,Zhang Z Y,Nie J F,Bourgeois L,Peng L M. On the strengthening precipitate phases and phase transformation ofβ″/β'in a Mg-Sm-Zr alloy[J].Mater. Des.,2017,116:419.
• [4]张清,李全安,井晓天,张兴渊.稀土Sm在耐热镁合金中的应用[J].铸造,2010,59(3):260.Zhang Q,Li Q A,Jing X T,Zhang X Y. Application of rare earth Sm to heat resistant magnesium alloy[J].China Foundry,2010,59(3):260.
• [5]邝亚飞,王泽辉,房大庆,柴跃生,武华杰.时效处理对热挤压Mg-x Zn(x=1,3,5)-Y合金组织与力学性能的影响[J].中国稀土学报,2016,34(5):600.Kuang Y F,Wang Z H,Fang D Q,Chai Y S,Wu H J.Effects of aging treatment on microstructure and mechanical properties of hot extrusion Mg-x Zn(x=1,3,5)-Y alloys[J]. Journal of the Chinese Society of Rare Earths,2016,34(5):600.
• [6]李杰华,介万奇,杨光昱.稀土元素Gd对Mg-ZnZr镁合金组织和性能的影响[J].稀有金属材料与工程,2008,37(9):1587.Li J H,Jie W Q,Yang G Y. Effect of gadolinium on microstructure and the mechanical properties of Mg-ZnZr cast magnesium alloys[J]. Rare Metal Materials and Engineering,2008,37(9):1587.
• [7] Chai Y S,Gao Z G,Cai K L,Fang D Q. Microstructure and mechanical properties of extruded Mg-Sm-Ca alloys[J]. Rare Met. Mater. Eng.,2016,45(2):287.
• [8]高奇峰.稀土元素对AZ91D镁合金组织与性能的影响研究[J].热加工工艺,2016,45(18):84.Gao Q F. Study on effects of rare earth element on microstructure and properties of AZ91D alloy[J]. Hot Working Technology,2016,45(18):84.
• [9]耿振伟,肖代红. Mg-13Gd-2Nd-2Cu合金的显微组织与力学性能[J].中国稀土学报,2017,35(3):360.Geng Z W,Xiao D H. Microstructure and mechanical properties of Mg-13Gd-2Nd-2Cu alloy[J]. Journal of the Chinese Society of Rare Earths,2017,35(3):360.
• [10] Liu L Z,Chen X H,Pan F S,Wang Z W,Liu W,Cao P,Yan T,Xu X Y. Effect of Y and Ce additions on microstructure and mechanical properties of Mg-Zn-Zr alloys[J]. Mater. Sci. Eng.,A,2015,644:247.
• [11] Liu L Z,Chen X H,Pan F S,Tang A T,Wang X L,Liu J,Gao S Y. Microstructure,texture,mechanical properties and electromagnetic shielding effectiveness of Mg-Zn-Zr-Ce alloys[J]. Mater. Sci. Eng.,A,2016,669:259.
• [12]黄晓锋,苏继鹏,毕广利,秦牧岚,张玉. Mg-ZnZr-x Nd镁合金的非枝晶组织演变[J].铸造技术,2015,36(9):2276.Huang X F,Su J P,Bi G L,Qin M L,Zhang Y.Non-dendritic microstructure evolution of Mg-Zn-Zr-x Nd alloy[J]. Foundry Technology,2015,36(9):2276.
• [13]袁明,郑子樵. Mg-2. 6Sm-1. 3Gd-0. 6Zn-0. 5Zr镁合金显微组织和力学性能研究[J].稀有金属材料与工程,2014,43(11):2787.Yuan M,Zheng Z Q. Microstructure and mechanical properties of Mg-2. 6Sm-1. 3Gd-0. 6Zn-0. 5Zr alloy[J].Rare Metal Materials and Engineering, 2014, 43(11):2787.
• [14]于明海,郭二军,冯义成,王丽萍,王长亮.稀土Sm对铸态Mg-0. 4Zn-0. 8Zr合金组织和性能的影响[J].金属热处理,2016,41(5):78.Yu M H,Guo E J,Feng Y C,Wang L P,Zhang C L.Effect of Sm on microstructure and mechanical properties of as-cast Mg-0. 4Zn-0. 8Zr alloys[J]. Heat Treatment of Metals,2016,41(5):78.
• [15] Zhang Y,Huang X F,Li Y,Zhang,Ma Z D,Ma Y,Hao Y. Effects of samarium addition on as-cast microstructure,grain refinement and mechanical properties of Mg-6Zn-0. 4Zr magnesium alloy[J]. J. Rare Earths,2017,35(5):494.
• [16] Luo X P,Fang D Q,Li Q S,Chai Y S. Microstructure and mechanical properties of an Mg-4. 0Sm-1. 0Ca alloy during thermomechanical treatment[J]. J. Rare Earths,2016,34(11):1134.
• [17] Xia X Y,Sun W H,Luo A A,Stone D S. Precipitation evolution and hardening in Mg-Sm-Zn-Zr alloys[J].Acta Mater.,2016,111:335.
• [18] Yang Q,Bu F Q,Meng F Z,Qiu X,Zhang D P,Zheng T,Liu X J,Meng J. The improved effects by the combinative addition of lanthanum and samarium on the microstructures and the tensile properties of high-pressure die-cast Mg-4Al-based alloy[J]. Mater. Sci. Eng.,A,2015,628:319.
• [19]陈晓强,刘江文,罗承萍.高强度Mg-Zn系合金的研究现状与发展趋势[J].材料导报,2008,22(5):58.Chen X Q,Liu J W,Luo C P. Research status and development trend of Mg-Zn alloys with high strength[J]. Materials Review,2008,22(5):58.
• [20] Sun M,Hu X Y,Peng L M,Fu P H,Peng Y H.Effects of Sm on the grain refinement and mechanical properties of AZ31 magnesium alloy[J]. Mater. Sci.Eng. A,2015,620:89.
• [21]李梅菊,丁雨田.稀土元素Gd和Sm对AZ81镁合金组织和性能的影响[J].铸造,2015,64(2):105.Li M J,Ding Y T. Effect of Gd and Sm on the microstructure and mechanical properties of AZ81 magnesium alloy[J]. Foundry,2015,64(2):105.
• [22]文九巴,王浩,贺俊光,马景灵,杨永顺,邵海洋.Sm对AZ80镁合金组织和力学性能的影响[J].材料热处理学报,2014,34(2):47.Wen J B,Wang H,He J G,Ma J L,Yang Y S,Shao H Y. Influence of Sm addition on microstructure and mechanical properties of AZ80 magnesium alloys[J].Transactions of Materials and Heat Treatment,2014,34(2):47.