王海涛,唐彬彬,金培鹏,王金辉

• 1:青海省新型轻合金重点实验室
• 2:青海省高性能轻金属合金及深加工工程技术研究中心

摘要(Abstract)：

利用扫描电镜(SEM)、能谱微区分析(EDS)、X射线衍射(XRD)和INSTRON万能试验机等研究了退火和固溶处理对喷射沉积法制备的SiC_p/7055铝基复合材料组织和性能的影响。结果表明:复合材料基体中存在第二相Al_2Cu,退火和固溶处理时复合材料基体均发生静态再结晶,产生了再结晶组织;300℃退火20 h后能显著提高复合材料的伸长率,从铸态的5.8%提高到10.2%,提高了76%,但抗拉强度和屈服强度从铸态329 MPa和171 MPa降低到293.37 MPa和140 MPa,材料塑性的提高主要是产生了再结晶组织;500℃固溶1 h后复合材料的屈服强度提高到276 MPa,提高了61%,抗拉强度提高到435 MPa,提高了32%,伸长率略有下降;热处理后复合材料性能的优化主要是由于基体中Al_2Cu第二相溶解产生的固溶强化效果以及部分未溶Al_2Cu相弥散分布引起的弥散强化效果。

关键词(KeyWords)： 喷射沉积;铝基复合材料;固溶处理

Abstract:

Keywords:

基金项目(Foundation): 青海省新型轻合金重点实验室资助项目(2017-ZJ-Y17)

作者(Author): 王海涛,唐彬彬,金培鹏,王金辉

DOI: 10.13289/j.issn.1009-6264.2019-0006

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