卢楠方,程和法,黄笑梅,夏明旷,秦晓雄

• 1:合肥工业大学材料科学与工程学院
• 2:中国电子科技集团公司第四十三研究所

摘要(Abstract)：

采用P对熔铸法制备的Al-30%Si合金进行变质处理,并对合金进行固溶处理,研究了P变质和固溶处理对Al-30%Si合金微观组织和性能的影响。结果表明:P变质对Al-30%Si合金中初晶硅具有显著的细化效果,加入0.15%P可使初晶硅平均尺寸减小至33.2μm,同时,共晶硅也得到明显的细化;530℃×6 h单级固溶处理只能对初晶硅和共晶硅的形态起到一定的改善作用;而570℃×2 h+530℃×2 h二级固溶处理,能够使初晶硅形态由多角块状转变为接近球状,并且,共晶硅由针状转变成细小的球状颗粒,均匀弥散的分布于Al基体中。经P变质和单级固溶处理后,Al-30%Si合金抗弯强度由铸态的125.76 MPa提高至218.31 MPa,而经过二级固溶处理可使合金的抗弯强度进一步提升至232.45 MPa。

关键词(KeyWords)： Al-30%Si;P变质;固溶处理;微观组织;抗弯强度

Abstract:

Keywords:

基金项目(Foundation): 安徽省科技攻关重大项目(1301021006)

作者(Author): 卢楠方,程和法,黄笑梅,夏明旷,秦晓雄

DOI: 10.13289/j.issn.1009-6264.2019-0073

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