Alfevsi Resistant Aluminum Alloy To Spray Deposition Process Analysis And Research

Rapidly solidified high temperature aluminum alloys are of lightweight structure materials with high specific strength, high specific stiffness and excellent heat-resistance. In this paper it was analyzed and researched on process of spray deposition of AlFeVSi heat-resistant aluminum alloy.The research focused on improving cooling rate of rapidly solidified high temperature aluminum alloys. The hydrodynamic analysis of the structure and layout of nozzle showed that the ideal conditions of continuous atomizing were the presence of subatmospheric area near the exit of delivery tube.The continuous and uniform supply of powder was realized by using variable torque screw feeder, and powder was transported by pneumatic conveyer with pressure. The pneumatic carrier with the mode of submissively gravitational field reduced the agglomeration of powder and improved the transportation.The results showed that: the addition of over-spray powder improved the cooling rate of spray deposition and enhanced the mechanical properties of materials remarkably. Within certain addition range, the cooling rate would increase with the addition of over-spray powder.According to this technology, the strength of 8009 alloy by adding over-spray powder of FVS1212 was 536.7MPa, close to the strength ofFVS 1212 alloy prepared by method of planar flow. The plasticity of the samples was better than that of FVS 1212 alloy.