(昆明理工大学 材料科学与工程学院，昆明 650093)
摘 要: 采用自制的喷射沉积连续挤压设备，完成2A12铝合金的喷射沉积连续挤压试验，获得了d 7 mm的铝合金制品，并采用光学显微镜和扫描电镜对其显微组织进行分析。结果表明：在本试验条件下，该制品由帽状的粗晶层和细晶层交替堆垛而成，粗晶层的晶粒尺寸不大于30 μm，细晶层的晶粒尺寸在10 μm以下；该制品内仅有少量尺寸在3 μm以内的孔洞，相对密度可达99.1%。
关键字: 快速凝固；连续挤压；喷射沉积；难成形材料；显微组织
（Faculty of Materials Science and Engineering, Kunming University of Science and Technology,
Kunming 650093, China）
Abstract:The spray forming Conform experiment of 2A12 aluminum alloy was accomplished by self-made spray forming Conform equipment. Ultimately, the Al alloy rod with diameter of 7 mm is obtained. The microstructure of the Al alloy rod was analyzed by optical microscopy (OM) and scanning electron microscopy (SEM). The results show that the alloy rod is composed of alternately hat-like coarse-grained layer with grain size under 30 μm and fine-grained layer with grain size under 10 μm. There are a little holes with size less than 3 μm, and the relative density of the product is 99.1%.
Key words: rapid solidification; Conform; spray forming; difficult forming materials; microstructure
