Powder metallurgy method for preparing foam aluminum
A technology of powder metallurgy and aluminum foam, which is applied in the field of aluminum foam prepared by powder metallurgy, can solve the problems of uneven structure, low density, and low comprehensive performance of aluminum foam, reduce pore structure defects, reduce production costs, shorten The effect of melting
Inactive Publication Date: 2018-12-18
四会市亿和铝业有限公司
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Problems solved by technology
Due to the high porosity, large specific surface area and low density of foamed aluminum, it has the characteristics of sound absorption, heat insulation, shock absorption, energy absorption, electromagnetic wave shielding, good cushioning performance, and flame retardancy. The method of producing foamed aluminum is melt foaming. method, infiltration casting method, electrophoresis method, bubble method, sputtering deposition method, sintering method, etc., but the structure of aluminum foam manufactured by the above method is not uniform, the comprehensive performance is low, and the production process is unstable, and the product yield is low. The production cost is high, which seriously affects the application and promotion of foamed aluminum composite structures
Method used
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Experimental program
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Effect test
Embodiment Construction
[0012] The technical solution of the present invention is: a method for preparing foamed aluminum material by powder metallurgy, which specifically includes the following steps:
[0013] Step 1. Selection of foaming agent TiH2: Use vibrating sieve screening to select TiH2 powder with the same particle size as foaming agent;
[0014] Step 2. Preparation of the foamed preform: After mixing the foaming agent, aluminum or aluminum alloy powder and additives in proportion, the mixture is extruded;
[0015] Step 3: Put the foamable prefabricated body into the model. After preheating for a period of time, quickly transfer it to the holding furnace for heat preservation and foaming. After foaming, the aluminum foam can be produced.
[0016] Step 2: The preparation process of the prefabricated body is as follows: the mixing time of the powder is 120 minutes. After mixing evenly, a 5000KN extruder is used to compact the powder by cold pressing at 400MPa for 10 minutes, and then heated t...
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The invention relates to the technical field of foam materials, in particular to a powder metallurgy method for preparing foam aluminum. Firstly, a vibrating screen screening way is adopted, TiH2 powder with the uniform particle size is selected to make a foaming agent, then the foaming agent, aluminum or aluminum alloy powder and an additive are mixed proportionally, and extrusion molding is conducted on the mixture; and finally, a foaming precast body is placed in a model, after preheating for a period of time, the foaming precast body is quickly transferred into a heat insulation furnace for heat insulation and foaming, and the foam aluminum can be obtained after foaming. By means of the foam aluminum prepared by the powder metallurgy method, the pore structure defects of a foam aluminum composite structure are reduced, and the product yield is high.
Description
technical field [0001] The invention relates to the technical field of foam materials, in particular to a method for preparing foam aluminum materials by powder metallurgy. Background technique [0002] As a new type of functional material, aluminum foam has broad application prospects due to its unique structure and performance. Due to the high porosity, large specific surface area and low density of foamed aluminum, it has the characteristics of sound absorption, heat insulation, shock absorption, energy absorption, electromagnetic wave shielding, good cushioning performance, and flame retardancy. The method of producing foamed aluminum is melt foaming. method, infiltration casting method, electrophoresis method, bubble method, sputtering deposition method, sintering method, etc., but the structure of aluminum foam manufactured by the above method is not uniform, the comprehensive performance is low, and the production process is unstable, and the product yield is low. Th...
Claims
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IPC IPC(8): B22F3/11
CPCB22F3/1125
Inventor 张翔
Owner 四会市亿和铝业有限公司