李静,宋沅峰,王建华,苏旭平,涂浩,刘亚,吴长军

• 1:湘潭大学机械工程学院
• 2:常州大学材料科学与工程学院
• 3:常州大学先进金属材料常州市重点实验室

摘要(Abstract)：

通过向Al-Cu-Mg合金液中加入经过预处理的快速凝固Al-7%Ti粉进行固液混合近液相线铸造,制备了不同Ti含量的Al-Cu-Mg-Ti合金。采用扫描电镜分析了合金的铸态晶粒组织和Al3Ti相的形态、尺寸与分布,研究了Al-7%Ti粉预处理工艺对Al-Cu-Mg-Ti合金铸态显微组织的影响,提出了优化的Al-7%Ti合金粉预处理工艺和加入量。结果表明,固液混合近液相线铸造Al-Cu-Mg-Ti合金的晶粒组织明显细化;合金中的Al3Ti相颗粒基本保持在2～10μm,与Al-7%Ti粉中的Al3Ti相颗粒尺寸相当,且弥散均匀分布在铸态组织中。当钛含量超过1.5%时,即当Al-7%Ti合金粉的加入量超过21.4%时,对合金晶粒组织的细化作用降低,且粗大的针状Al3Ti相明显增多。

关键词(KeyWords)： Al-Cu-Mg-Ti合金;显微组织;预处理工艺;固液混合近液相线铸造;Al3Ti相颗粒

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51074030);; 青蓝工程资助

作者(Author): 李静,宋沅峰,王建华,苏旭平,涂浩,刘亚,吴长军

DOI: 10.13289/j.issn.1009-6264.2013.01.009

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