镁含量对粉末冶金Al-3.9Cu-Mg合金组织与力学性能的影响

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摘要以高纯铝粉、铜粉、镁粉为原料,通过粉末冶金法制备镁含量(质量分数,下同)分别为0.5%,0.8%,1%,1.2%和1.6%的Al-3.9Cu-Mg合金材料,对合金的显微组织与力学性能进行观察与测试,研究镁含量对显微组织和力学性能的影响。结果表明：在镁含量低于2%时,合金的优化烧结温度为620 ℃。在铝合金中加入镁元素后,合金组织更加均匀。合金的致密度、硬度以及抗拉强度均随镁含量增加先升高后下降。当镁含量为1%时材料性能最佳,致密度为98.1%,硬度(HBW)为93.1,抗拉强度达到242 MPa。

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	谢娇雅
	刘如铁
	陈洁
	熊翔
	栾怀壮

关键词 ：粉末冶金, 铝合金, 镁含量, 烧结温度, 抗拉强度

Abstract：Al-3.9Cu-Mg alloy with Mg content (mass fraction) of 0.5%, 0.8%, 1%, 1.2% and 1.6% were prepared by powder metallurgy using high-purity aluminum powder, copper powder and Mg powder as raw materials. The microstructural analysis and mechanical property tests were carried out to study the effects of Mg content on the microstructure and mechanical properties. The results show that the optimum sintering temperature is 620 ℃ when the Mg content is less than 2%. The microstructure of the alloy tends to be uniform with increasing the content of Mg. The density, hardness, and tensile strength of the alloy first increase and then decrease with increasing Mg content. The optimal properties of Al-3.9Cu-1Mg alloy with a density of 98.1%, a hardness (HBW) of 93.1, and a tensile strength of 242 MPa is obtained when the Mg content is 1%.

Key words： powder metallurgy Al alloy Mg content sinter temperature tensile strength

收稿日期: 2018-03-14 出版日期: 2019-07-19

ZTFLH:

TB31

基金资助:国家重点研发计划资助项目(2016YFB0700302)

通讯作者: 熊翔,教授,博士。电话：13308414388;E-mail: xiongx@csu.edu.cn

引用本文:

谢娇雅, 刘如铁, 陈洁, 熊翔, 栾怀壮. 镁含量对粉末冶金Al-3.9Cu-Mg合金组织与力学性能的影响[J]. 粉末冶金材料科学与工程, 2018, 23(6): 547-552.
XIE Jiaoya, LIU Rutie, CHEN Jie, XIONG Xiang, LUAN Huaizhuang. Effects of the magnesium content on the microstructure and mechanical properties of Al-Cu-Mg sintered alloy. Materials Science and Engineering of Powder Metallurgy, 2018, 23(6): 547-552.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2018/V23/I6/547

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