固溶处理对超高Zn含量7系铝合金组织与性能的影响  

Effect of Solution Treatment on Mechanical Properties and Microstructure ofSeries 7 Aluminum Alloy with Ultra-high Zn Content

作　　者：田文明 乐杨 张志坤 高硕 Tian Wenming;Le Yang;Zhang Zhikun;Gao Shuo(School of Materials Science&Engineering,North China Institute of Aerospace Engineering,Langfang 065000,China)

机构地区：[1]北华航天工业学院材料工程学院,河北廊坊065000

出　　处：《北华航天工业学院学报》2024年第1期6-8,11,共4页Journal of North China Institute of Aerospace Engineering

基　　金：北华航天工业学院科学研究项目(ZD202201);河北省高等学校科学技术研究项目(QN2019104);河北省自然科学基金资助项目(E2019409052)。

摘　　要：本研究利用气雾化法制备微米级超高Zn含量(质量分数25%)铝合金粉末,再通过放电等离子烧结(SPS)可制备出富Zn增强相细小弥散的块体合金,最后经过固溶-自然时效热处理可进一步优化合金增强相的种类、尺寸及分布,在固溶温度400℃时,固溶-自然时效后的超高Zn含量铝合金的抗拉强度可达540MPa,断裂伸长率为5.3%,气雾化-SPS烧结-固溶时效的工艺路线为超高Zn含量7系铝合金的制备提供了新的思路。Microns ultra-high Zn conten(t 25%mass fraction)aluminum alloy powders were prepared by aerosol atomization in this experiment.Then the bulk high Zn content aluminum alloy with Fine and well-distributed secondary phases was fabricated by spark plasma sintering(SPS)using these high Zn content aluminum powders.The solution-natural aging treatments were also used to further optimize the composition,size and distribution of secondary phases.The tensile strength reached 540MPa and break elongation reached 5.3%when the solution treatment temperature was 400℃.The multiple process of gas atomization-SPS sintering-solution aging treatment provides a new preparation method to ultra-high Zn content 7xxx series aluminum alloys.

关 键 词：铝合金 气雾化 SPS烧结 固溶-时效 超高Zn含量 

分 类 号：TG172.9[金属学及工艺—金属表面处理]