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Method for preparing constructional gradient material
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A technology of structural gradients and metal materials, applied in other manufacturing equipment/tools, metal rolling, manufacturing tools, etc., can solve problems such as undiscovered, small-scale gradient functional materials that do not have stress-preventing functions, and have no practical value
Inactive Publication Date: 2007-07-11
UNIV OF SCI & TECH BEIJING
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[0002] As a new type of material, due to its special properties, gradient functional materials have broad application prospects in the fields of aviation, aerospace, machinery, and chemical industry. The current preparation methods are: powdermetallurgy, combustion synthesis, centrifugal casting, plasma spraying, gas phasePrecipitation method, etc., "Materials Herald" published in China in the third issue of 1996 "Research Status and Prospects of New Functional Gradient Materials" published the preparation method of the above-mentioned functionally graded materials, and no "structurally graded materials" identical or similar to the present invention have been found. The outstanding disadvantages of the existing preparation methods are: firstly, the sample size of the prepared functionally gradient materials is small, and does not have much practical value; secondly, the prepared small-size functionally graded materials only have the function of stress relaxation but not stress-prevention function
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example 1
[0018] Example 1 Preparation of Aluminum Alloy Gradient Structure Material by Cumulative Lamination Rolling
[0019] (1) Degrease, pickle, rinse and dry the surfaces of two aluminum alloys with the same size;
[0020] (2) Scrub the surface of the aluminum alloy material to be laminated with a wire brush to make it work hardened;
[0021] (3) Lay two pieces of aluminum alloy together and seal them around with argonarc welding;
[0022] (4) heating to below the recrystallization temperature with a heating furnace, the temperature is 120 ℃, heat preservation for 30 minutes, rolling with a common rolling mill, a reduction of 50%;
[0023] (5) Superimpose another processed aluminum alloy with the above-processed material and repeat the above steps;
[0024] (6) Repeat steps (1) to (5) 4 times;
[0025] (7) The resulting material was incubated at 80° C. for 60 minutes;
[0026] (8) The resulting material is trimmed around using a shear.
example 2
[0027] Example 2 Cumulative lamination rolling method to prepare pure aluminum gradient structure material
[0028] (1) Degrease, pickle, rinse and dry the surfaces of two pieces of pure aluminum with the same size;
[0029] (2) Scrub the surface of the pure aluminum material to be laminated with a wire brush to make it harden;
[0030] (3) Lay two pieces of pure aluminum together, and fix the four corners with pure aluminum rivets;
[0032] (5) The obtained material was incubated at 120° C. for 30 minutes;
[0033] (6) Repeat the above steps (1) to (5) with another piece of pure aluminum and the above processed material;
[0034] (7) Repeat steps (1) to (6) 6 times;
[0035] (8) The resulting material was incubated at 80° C. for 30 minutes;
[0036] (9) The resulting material is trimmed around using a shear.
[0037] The grain size of the obtained material from the upper...
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Abstract
The invention offers a producing way of construction gradient material, concrete way is: clean the surface of metal material A1, A2 by degreasing and acid washing craft; make the matching surface hard using steel brush; seal completely by welded under the protection of argon gas; heat in the heating stove, the temperature is under crystallizing again temperature 0-50 degC, and keep the temperature for 30--60mins; roll them on the common rolling mill to 50--70%; repeat the steps above using material A3, until meet the design request. The advantages of the invention are: not only alleviate the material crush, but also obstruct the crack expanding. We can produce construction gradient material continually, using in aviation, machine, chemical engineering, metallurgy and so on field.
Description
technical field [0001] The invention belongs to the technical field of metal material processing and preparation, in particular to a preparation method of a structural gradient material. Background technique [0002] As a new type of material, due to its special properties, gradient functional materials have broad application prospects in the fields of aviation, aerospace, machinery, and chemical industry. The current preparation methods are: powdermetallurgy, combustion synthesis, centrifugal casting, plasma spraying, gas phasePrecipitation method, etc., "Materials Herald" published in China in the third issue of 1996 "Research Status and Prospects of New Functional Gradient Materials" published the preparation method of the above-mentioned functionally graded materials, and no "structurally graded materials" identical or similar to the present invention have been found. The outstanding disadvantages of the existing preparation methods are: firstly, the sample size of the...
Claims
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