Device and method for preparing high-toughness cast aluminum-based composite material

Abstract

The invention relates to a preparation device and method for a high-toughness cast aluminum-based composite material, and belongs to the technical field of metal material processing. The device comprises a stirring mechanism, a feeding hopper, a sealing furnace, a preparation crucible, a heater, a crucible rotating shaft, a mold, a deflation valve and an argon supply device. According to the method, volatile elements and non-volatile elements are separately designed and proportioned, the non-volatile elements are firstly smelted, a reinforcing phase is added, strong shearing and stirring are performed to prepare the aluminum-based composite material, then volatile element alloy is added into the aluminum-based composite material, short-time stirring is performed, component homogenization is promoted, and the high-strength aluminum-based composite material is obtained. And finally, the high-toughness aluminum-based composite material is obtained. According to the device and the method, the technical difficulties that components are difficult to control and the performance fluctuates due to the fact that a large amount of volatile strengthening elements volatilize when the high-toughness aluminum-based composite material is cast through traditional vacuum stirring can be overcome, and the cost is also greatly reduced.

Description

Technical field [0001] The present invention belongs to the field of metal material processing technology, particularly relates to a high strength casting aluminum matrix composite material preparation device and method. Background [0002] Composite materials due to the high specific strength, high specific rigidity, high wear resistance, low thermal expansion and excellent shock absorption performance dimensional stability and other excellent comprehensive performance, is the aerospace, automotive manufacturing and other key components of the lightweight, high performance of the ideal material, has a huge application potential and broad market prospects. [0003] At present, the preparation methods of composite materials mainly include powder metallurgy and stirred casting method. [0004] The comprehensive performance of aluminum matrix composites prepared by powder metallurgy method is good, and the composite of metals and particles with large volume and mass difference can ...

AI Technical Summary

Problems solved by technology

The equipment used in this method is simple, easy to operate, and low in cost, but the reinforcing particles are not easy to mix evenly with the matrix material, and the gas absorption of the material is serious

Moreover, in the stirring casting method, in order to reduce the suction during the stirring process, the vacuum stirring casting method can be used, but when the high-strength and toughness cast aluminum matrix composite is prepared by the vacuum stirring casting method, since the high-strength and toughness aluminum alloy melt contains a large amount of Therefore, it is very easy to cause a large amount of volatile elements to precipitate during the vacuum stirring process, resulting in difficult control of the composition of the aluminum matrix composite material and unstable performance. Therefore, it is difficult to effectively prepare high-strength and tough aluminum matrix composite materials using vacuum stirring technology , the advantages of vacuum stirring are difficult to play in the preparation of high-strength cast aluminum matrix composites

Images