张洪静,黄晓冬,孙有政,吕正风

• 1:航鑫材料科技有限公司
• 2:山东南山铝业股份有限公司国家铝合金压力加工工程技术研究中心

摘要(Abstract)：

采用差热分析仪、光学显微镜、扫描电镜、X射线衍射仪和力学试验机研究了固溶处理对7050铝合金锻板组织和拉伸性能的影响。结果表明:变形态7050铝合金锻板中的第二相为含铁相(Al_7Cu_2Fe)、S相(Al_2CuMg)和MgZn_2相。MgZn_2相能够在467℃到482℃温度区间回溶,当固溶温度达到482℃时,7050铝合金中的S相几乎全部溶入铝基体。单级固溶条件下,7050铝合金强度是沉淀强化和位错强化二者平衡的结果,呈现出先升高后降低的趋势,并在477℃时达到最大值。202℃低温保温处理促进7050铝合金发生回复,抑制再结晶,增大位错强化效果,其抗拉强度和屈服强度达到最大值,分别为559.5 MPa和500 MPa。

关键词(KeyWords)： 固溶温度;7050铝合金;组织;拉伸性能

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 张洪静,黄晓冬,孙有政,吕正风

DOI: 10.13289/j.issn.1009-6264.2020-0168

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