CN112410695A - Graphene reinforced Ti2Cryogenic treatment method for AlNb composite material - Google Patents
Graphene reinforced Ti2Cryogenic treatment method for AlNb composite material Download PDFInfo
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- CN112410695A CN112410695A CN202011098546.7A CN202011098546A CN112410695A CN 112410695 A CN112410695 A CN 112410695A CN 202011098546 A CN202011098546 A CN 202011098546A CN 112410695 A CN112410695 A CN 112410695A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
Abstract
The invention discloses graphene reinforced Ti2A cryogenic treatment method of an AlNb composite material belongs to the technical field of metal matrix composite materials and preparation thereof. In order to eliminate or reduce the interface stress in the composite material, the graphene is reinforced with Ti2Putting the AlNb composite material into a cryogenic treatment device, then filling liquid nitrogen into the cryogenic treatment device to ensure that the composite material is continuously or step-wise cooled to the cryogenic treatment temperature according to a set cooling speed and is kept warm for a certain time, and then heating to room temperature according to the set heating speed, thus finishing 1-time cryogenic treatment of the composite material; the composite material can be subjected to repeated cryogenic treatment for a single time or multiple times; the cryogenic treatment can eliminate or reduce graphene and Ti2The residual stress of the AlNb matrix interface, the optimized stress state, the interface bonding performance and the comprehensive mechanical property can be effectively improved.
Description
Technical Field
The invention relates to the technical field of metal matrix composite materials and preparation thereof, and particularly relates to graphene reinforced Ti2A cryogenic treatment method of an AlNb composite material.
Background
Graphene reinforced Ti2The AlNb composite material has good high-temperature performance, low density and good oxidation resistance, is considered to be a key high-temperature structural material for replacing the nickel-based high-temperature alloy in the future to be applied to aeroengines, and has very important application prospect. Graphene reinforced Ti2AlNb composite material is compared with Ti2The AlNb alloy has good room temperature plasticity and toughness. However, due to graphene and Ti2The AlNb alloy has larger difference of thermal expansion coefficients, and the high-temperature preparation process of the composite material can cause larger residual stress to exist in the composite material, influence the combination property of a composite interface and seriously reduce the comprehensive property of the composite material. The cryogenic treatment technology is a new method for treating materials at the temperature below 130 ℃ below zero, and is one of the latest material strengthening and toughening treatment processes. The subzero treatment can effectively optimize the stress state of the composite material interface and improve the interface bonding performance. Thus, the graphene is reinforced with Ti2The cryogenic treatment of the AlNb composite material can effectively improve the comprehensive mechanical property of the AlNb composite material and promote the application of the AlNb composite material in aeronautical engine, thereby greatly improving the operational performance of the aeronautical engine and providing more powerful guarantee for safeguarding the national ownership and the rights and interests of people.
Disclosure of Invention
The invention aims to solve the problems that: provides a graphene reinforced Ti2Cryogenic treatment method of AlNb composite material for enhancing Ti in graphene2The AlNb composite material is subjected to liquid nitrogen cryogenic treatment, so that the stress state of the composite material interface is optimized, the interface bonding performance is improved, and the comprehensive mechanical property is improved.
The technical scheme provided by the invention for solving the problems is as follows: graphene reinforced Ti2A cryogenic treatment method of an AlNb composite material,
step 1, reinforcing Ti with graphene2Putting the AlNb composite material sample into a cryogenic treatment device, and sealing the device;
step 2, filling liquid nitrogen into the closed cryogenic treatment device to reduce the internal temperature of the closed cryogenic treatment device to the required cryogenic treatment temperature according to a cooling speed, wherein the cooling speed is 1-60 ℃/min; or step cooling, firstly cooling from room temperature to 100-130 ℃ below zero at a cooling speed of 1-60 ℃/min, preserving heat for 1-5 hours, then cooling to the required cryogenic treatment temperature at a cooling speed of 1-60 ℃/min, and preserving heat for a certain time at the temperature;
step 3, after the heat preservation is finished, raising the temperature of the sample in the cryogenic treatment device to room temperature according to the temperature raising speed, or directly taking out the sample and raising the temperature under the room temperature condition;
and 4, or repeating the subzero treatment of the sample obtained in the step 3 for 1 to 15 times according to the step 2 and the step 3 and then taking out the sample.
Preferably, the temperature of the cryogenic treatment in the step 2 is minus 130 ℃ to minus 196 ℃.
Preferably, the heat preservation time of the step 2 is 0.5 to 120 hours.
Preferably, the temperature rise speed in the step 3 is 1-40 ℃/min.
Compared with the prior art, the invention has the advantages that: the invention strengthens Ti by graphene2Putting the AlNb composite material into a cryogenic treatment device, then filling liquid nitrogen into the cryogenic treatment device to ensure that the composite material is continuously or step-wise cooled to the cryogenic treatment temperature according to a set cooling speed and is kept warm for a certain time, and then heating to room temperature according to the set heating speed, thus finishing 1-time cryogenic treatment of the composite material; the composite material can be subjected to repeated cryogenic treatment for a single time or multiple times; the cryogenic treatment can eliminate or reduce graphene and Ti2The residual stress of the AlNb matrix interface, the optimized stress state, the interface bonding performance and the comprehensive mechanical property can be effectively improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 shows graphene-reinforced Ti in example 1 of the present invention2Microscopic structure picture of AlNb composite material after cryogenic treatment.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, so that how to implement the technical means for solving the technical problems and achieving the technical effects of the present invention can be fully understood and implemented.
Example 1
Graphene reinforced Ti2A cryogenic treatment method of an AlNb composite material,
step 1, reinforcing Ti with graphene2Putting the AlNb composite material sample into a cryogenic treatment device, and sealing the device;
step 2, filling liquid nitrogen into the closed cryogenic treatment device, reducing the internal temperature of the closed cryogenic treatment device from room temperature to minus 130 ℃ at a cooling speed of 10 ℃/min, preserving heat for 5 hours, reducing the internal temperature to minus 196 ℃ at a cooling speed of 20 ℃/min, and preserving heat for 20 hours;
step 3, raising the temperature of the sample in the cryogenic treatment device to room temperature according to the temperature raising speed of 5 ℃/min;
and 4, repeating the subzero treatment for 4 times on the subzero treated sample obtained in the step 3 according to the step 2 and the step 3, and then taking out the sample.
Example 2
Graphene reinforced Ti2A cryogenic treatment method of an AlNb composite material,
step 1, reinforcing Ti with graphene2Putting the AlNb composite material sample into a cryogenic treatment device, and sealing the device;
step 2, filling liquid nitrogen into the closed cryogenic treatment device, reducing the internal temperature of the closed cryogenic treatment device from room temperature to minus 100 ℃ at a cooling speed of 1 ℃/min, preserving heat for 1 hour, reducing the internal temperature to minus 130 ℃ at a cooling speed of 1 ℃/min, and preserving heat for 20 hours;
step 3, raising the temperature of the sample in the cryogenic treatment device to room temperature according to the temperature raising speed of 1 ℃/min;
and 4, repeating the subzero treatment for 4 times on the subzero treated sample obtained in the step 3 according to the step 2 and the step 3, and then taking out the sample.
Example 3
Graphene reinforced Ti2A cryogenic treatment method of an AlNb composite material,
step 1, reinforcing Ti with graphene2Putting the AlNb composite material sample into a cryogenic treatment device, and sealing the device;
step 2, filling liquid nitrogen into the closed cryogenic treatment device, reducing the internal temperature of the closed cryogenic treatment device from room temperature to minus 130 ℃ at a cooling speed of 30 ℃/min, preserving heat for 5 hours, reducing the internal temperature to minus 150 ℃ at a cooling speed of 30 ℃/min, and preserving heat for 20 hours;
step 3, raising the temperature of the sample in the cryogenic treatment device to room temperature according to the temperature raising speed of 20 ℃/min;
and 4, repeating the subzero treatment for 4 times on the subzero treated sample obtained in the step 3 according to the step 2 and the step 3, and then taking out the sample.
Example 4
Graphene reinforced Ti2A cryogenic treatment method of an AlNb composite material,
step 1, reinforcing Ti with graphene2Putting the AlNb composite material sample into a cryogenic treatment device, and sealing the device;
step 2, filling liquid nitrogen into the closed cryogenic treatment device, reducing the internal temperature of the closed cryogenic treatment device from room temperature to minus 130 ℃ at a cooling speed of 60 ℃/min, preserving heat for 5 hours, reducing the internal temperature to minus 196 ℃ at a cooling speed of 60 ℃/min, and preserving heat for 20 hours;
step 3, raising the temperature of the sample in the cryogenic treatment device to room temperature according to the temperature raising speed of 40 ℃/min;
and 4, repeating the subzero treatment for 4 times on the subzero treated sample obtained in the step 3 according to the step 2 and the step 3, and then taking out the sample.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the scope of the invention as defined by the independent claims are intended to be embraced therein.
Claims (4)
1. Graphene reinforced Ti2The subzero treatment method of the AlNb composite material is characterized by comprising the following steps:
step 1, reinforcing Ti with graphene2Putting the AlNb composite material sample into a cryogenic treatment device, and sealing the device;
step 2, filling liquid nitrogen into the closed cryogenic treatment device to reduce the internal temperature of the closed cryogenic treatment device to the required cryogenic treatment temperature according to a cooling speed, wherein the cooling speed is 1-60 ℃/min; or step cooling, firstly cooling from room temperature to 100-130 ℃ below zero at a cooling speed of 1-60 ℃/min, preserving heat for 1-5 hours, then cooling to the required cryogenic treatment temperature at a cooling speed of 1-60 ℃/min, and preserving heat for a certain time at the temperature;
step 3, after the heat preservation is finished, raising the temperature of the sample in the cryogenic treatment device to room temperature according to the temperature raising speed, or directly taking out the sample and raising the temperature under the room temperature condition;
and 4, or repeating the subzero treatment of the sample obtained in the step 3 for 1 to 15 times according to the step 2 and the step 3 and then taking out the sample.
2. The graphene-reinforced Ti of claim 12The subzero treatment method of the AlNb composite material is characterized by comprising the following steps: the temperature of the deep cooling treatment in the step 2 is minus 130 ℃ to minus 196 ℃.
3. The graphene-reinforced Ti of claim 12The subzero treatment method of the AlNb composite material is characterized by comprising the following steps: the heat preservation time of the step 2 is 0.5 to 120 hours.
4. The graphene-reinforced Ti of claim 12The subzero treatment method of the AlNb composite material is characterized by comprising the following steps: the temperature rise speed in the step 3 is 1-40 ℃/min.
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