[1]王凯锋,冯义成,张靖,等. 等温处理对Mg-3Al-2Ca-2Nd 组织和性能的影响[J].哈尔滨理工大学学报,2018,(01):35-40.[doi:10. 15938 /j. jhust. 2018. 01. 007]
 WANG Kai-feng,FENG Yi-cheng,ZHANG Jing,et al. Effect of Isothermal Treatment on Microstructureand Properties of Mg-3Al-2Ca-2Nd Alloy[J].哈尔滨理工大学学报,2018,(01):35-40.[doi:10. 15938 /j. jhust. 2018. 01. 007]
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 等温处理对Mg-3Al-2Ca-2Nd 组织和性能的影响()
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《哈尔滨理工大学学报》[ISSN:1007-2683/CN:23-1404/N]

卷:
期数:
2018年01期
页码:
35-40
栏目:
材料科学与工程
出版日期:
2018-02-25

文章信息/Info

Title:
 Effect of Isothermal Treatment on Microstructure
and Properties of Mg-3Al-2Ca-2Nd Alloy
文章编号:
1007- 2683( 2018) 01- 0035- 06
作者:
 王凯锋1 冯义成2 张靖2 赵思聪2 王丽萍2 郭二军2
 ( 1. 中国航发哈尔滨东安发动机有限公司,黑龙江哈尔滨150066;
2. 哈尔滨理工大学材料科学与工程学院,黑龙江哈尔滨150040)
Author(s):
 WANG Kai-feng1 FENG Yi-cheng2 ZHANG Jing2 ZHAO Si-cong2 WANG Li-ping2 GUO Er-jun2
 1. AECC Harbin Dong’an Engine Co. Ltd. ,Harbin 150066,China;
2. School of Material Science and Engineering,Harbin University of Science and Technology,Harbin 150040,China)
关键词:
 镁合金 等温处理 显微组织 力学性能
Keywords:
 magnesium alloy isothermal treatment microstructure mechanical property
分类号:
TG166; TB31
DOI:
10. 15938 /j. jhust. 2018. 01. 007
文献标志码:
A
摘要:
 为了研究等温处理工艺对Mg-3Al-2Ca-2Nd 合金组织和性能的影响,利用XRD、OM、
SEM、EDS 及拉伸试验机对试样进行组织观察和性能测试。结果表明,与铸态组织相比,420℃等温
处理的组织变化不明显,随着等温处理温度升高,铸态枝晶组织消失,转变为等轴晶组织且晶粒尺
寸变大。在等温处理过程中,Al11Nd3
相发生分解,生成热稳定性高的Al2Nd 相,而Al 原子固溶到
α-Mg 基体中; 层片状Al-Ca 金属间相转变为颗粒状组织。随等温处理温度增加,硬度、抗拉强度和
延伸率先增加后降低,在480℃时达到最大值,其值分别为66. 3 HV、144. 5 MPa 和2. 7%。
Abstract:
 The microstructure and mechanical properties of Mg-3Al-2Ca-2Nd alloy as-cast and isothermal
treated were studied by using XRD,OM,SEM,EDS and universal tensile testing machine. The experimental
results indicate that the microstructure of Mg-3Al-2Ca-2Nd alloy isothermal treated at 420℃ changes slightly
compared to that of as-cast alloy. With the increasing of isothermal treated temperature,the dendritic structure in
as-cast Mg-3Al-2Ca-2Nd alloy disappears,equiaxed grains appear,and the size of grain increases in isothermal
treated Mg-3Al-2Ca-2Nd alloy. The Al11Nd3 phases decompose and the Al2Nd phases with high thermal stability are
produced,and the Al is dissolved into α-Mg in the process of isothermal treatment. The flake Al-Ca phases are
changed into particle phases in the process of isothermal treatment. With the increasing of isothermal treated
temperature,the hardness,tensile strength and elongation of Mg-3Al-2Ca-2Nd alloy increase first and then
decrease,and the maximum value of hardness,tensile strength and elongation of Mg-3Al-2Ca-2Nd alloy treated at
480℃ are 66. 3 HV,144. 5 MPa and 2. 7%,respectively.
Keywords: magnesium alloy; isothermal treatment; microstructure

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更新日期/Last Update: 2018-05-04