CN117867313A - Al-Ti-C-Sr grain refiner and preparation method thereof - Google Patents
Al-Ti-C-Sr grain refiner and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 32
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 32
- 239000011812 mixed powder Substances 0.000 claims abstract description 28
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- 238000005245 sintering Methods 0.000 claims abstract description 24
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 22
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- 238000003756 stirring Methods 0.000 claims description 39
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 16
- 239000010949 copper Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229920001214 Polysorbate 60 Polymers 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
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- 238000002490 spark plasma sintering Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000010907 mechanical stirring Methods 0.000 claims description 2
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 2
- 150000001879 copper Chemical class 0.000 claims 2
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical group [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
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- 230000000052 comparative effect Effects 0.000 description 18
- 239000002245 particle Substances 0.000 description 17
- 229910000838 Al alloy Inorganic materials 0.000 description 10
- -1 aluminum-titanium-carbon Chemical compound 0.000 description 8
- 229910002804 graphite Inorganic materials 0.000 description 8
- 239000010439 graphite Substances 0.000 description 8
- 229910001339 C alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 229910001278 Sr alloy Inorganic materials 0.000 description 4
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- 244000137852 Petrea volubilis Species 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
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- UHZZMRAGKVHANO-UHFFFAOYSA-M chlormequat chloride Chemical compound [Cl-].C[N+](C)(C)CCCl UHZZMRAGKVHANO-UHFFFAOYSA-M 0.000 description 1
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Abstract
The invention discloses an Al-Ti-C-Sr grain refiner and a preparation method thereof, wherein the preparation method comprises the following steps: al powder, K 2 TiF 6 Adding NaCl, copper-plated graphite powder and Sr powder into a dispersing agent, and uniformly mixing to obtain a mixture; drying the mixture to obtain mixed powder, pressing the mixed powder into a block sample, and preheating to obtain a preheated sample; placing the preheated sample into a discharge plasma sintering furnace for sintering to obtain a preform; heating the pure aluminum block to melt the pure aluminum block to obtain molten aluminum; adding the preform into molten aluminum and mixing the same uniformlyObtaining a mixture; and (3) taking out the surface scum of the mixture after heat preservation treatment, and pouring the mixture into a die to form a target product. The preparation method provided by the invention has the advantages of simple preparation equipment, short process flow, high preparation efficiency and the like, and the prepared Al-Ti-C-Sr grain refiner has better grain refining effect.
Description
Technical Field
The invention belongs to the technical field of manufacturing of metal materials, and particularly relates to an Al-Ti-C-Sr grain refiner and a preparation method thereof.
Background
With the continuous rising of the quantity of the automobile which is kept in the world, the energy saving and consumption reduction effects brought by the light weight of the automobile are increasingly in the spotlight, especially the development of new energy automobiles, and the aluminum alloy materials have higher expectations for the light weight, and are recognized as the most promising metal materials for the light weight of the automobile in the industry. The aluminum alloy has the characteristics of small density, light weight, corrosion resistance, good processing formability, recycling and the like. Under the condition of reaching the same mechanical property index, the use quality can be reduced by 60 percent compared with the traditional steel material; under the same impact conditions, the aluminum alloy plate absorbs 50% more impact energy than the steel plate. Based on the above-described good characteristics, aluminum alloy materials have been widely used in automobiles, and have been expanded from the original engine block, transmission case, hub, and the like to various important parts of the automobile body. The automobile products produced in the United states in 1976 reach only 39kg of aluminum alloy per car, 62kg in 1982, and 100kg in 1998. The aluminum material used in the automobiles in the developed countries is 138kg, the aluminizing rate is 12%, the aluminum material used in the automobiles in China is quite different from the aluminum material used in foreign countries, the average aluminum consumption is only 60kg, and the aluminizing rate is less than 5%.
However, the industrial application of the aluminum alloy is limited due to the poor mechanical property of the aluminum alloy. The method for improving the mechanical properties of the aluminum-titanium-carbon alloy has become a research hot spot by adding the aluminum-titanium-carbon alloy grain refiner. Grain refinement is one of the important methods for improving the mechanical properties of aluminum and alloys thereof, reducing segregation and improving the compactness of castings.
Research shows that the grain refining effect of the aluminum-titanium-carbon intermediate alloy is mainly influenced by TiC, and the smaller the size is, the better the grain refining effect of the aluminum alloy is. In recent years, various methods have been adopted by many researchers for the preparation of aluminum-titanium-carbon intermediate alloys. In patent CN109055792A (a method for preparing Al-Ti-C intermediate alloy), potassium fluotitanate and graphite powder are adoptedMolten salt reaction in high temperature aluminum to prepare Al 3 Ti and TiC, prepared Al 3 Ti is between 10 and 20 mu m, the TiC particle size is between 1 and 1.5 mu m, and the obtained product still has the problem of larger TiC particle size. The preparation of smaller TiC to improve the grain refinement effect of the aluminum alloy is a problem to be solved in the aluminum product for the vehicle.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an Al-Ti-C-Sr grain refiner capable of refining TiC particles and a preparation method thereof. The preparation method has the advantages of simple preparation equipment, short process flow, high preparation efficiency and the like, and the prepared Al-Ti-C-Sr grain refiner has better grain refining effect.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a preparation method of an Al-Ti-C-Sr grain refiner comprises the following steps of
(1) Adding graphite powder into ethanol, and stirring with ultrasonic waves for 10min to obtain a mixed solution; adding Tween 60, cu (NO) into the mixed solution 3 ) 2 ·3H 2 O and C 6 H 12 O 6 ·H 2 And O, stirring for 2 hours, drying, cleaning and drying again to obtain copper-plated graphite powder.
(2) Al powder, K 2 TiF 6 Adding NaCl, copper-plated graphite powder and Sr powder into a dispersing agent, mechanically stirring, and performing ultrasonic dispersion to obtain a mixture; (Al powder, copper-plated graphite powder and Sr powder belong to a preform, the Al powder can be sintered and combined with the copper-plated graphite powder in advance in a plasma sintering furnace, and can also be sintered and combined with the Sr powder, and belong to the pre-combination, and finally the dispersion is better in the step 5; S)r is a rare earth element, is favorable for chemically generating TiC in the step 5, and Sr also has a certain function of a grain refiner, so that the function of the grain refiner can be better exerted
(3) Drying the mixture to obtain mixed powder, and pressing the mixed powder into blocks; then preheating is carried out to obtain a preheated sample;
(4) Placing the preheated sample into a discharge plasma sintering furnace for sintering to obtain a preform; the purpose of spark plasma sintering is to pre-mix the individual substances, especially to allow the Al powder to form a diffusion sintering effect with the copper-plated graphite powder, so that the reaction can be better performed in the subsequent reaction.
(5) Heating a pure aluminum block to a certain temperature to melt the pure aluminum block to obtain molten aluminum, adding the preform in the step (4) into the molten aluminum, mechanically stirring and ultrasonically stirring to uniformly mix the preform, preserving heat for 30min, taking out surface scum, pouring the surface scum into a mould, and molding to obtain the Al-Ti-C-Sr grain refiner;
as a preferable technical scheme, the dispersing agent in the step (2) is ethanol; al powder, K 2 TiF 6 The mass ratio of NaCl, copper-plated graphite powder and Sr powder is 40-50:20-30:10-15:5-10:2-3.
As a preferable technical scheme, the pressing pressure in the step (3) is 50-200MPa, such as 50MPa, 100MPa or 200MPa.
As the preferable technical proposal, the temperature in the discharge plasma sintering furnace in the step (4) is 800-1000 ℃, the pressure is 12-18MPa, and the sintering time is 2min. In the sintering process, the pressure value in the discharge plasma sintering furnace needs to be strictly controlled, the sintering is insufficient when the pressure is too small, and the over-sintering problem is caused when the pressure is too large.
As a preferable technical scheme, the temperature of the melt in the step (5) is 1000-1200 ℃, and the material of the die is iron or copper.
In the step (5), the ultrasonic stirring is performed at a power of 500W for 5-20min.
The second object of the invention is to provide the aluminum-titanium-carbon alloy grain refiner prepared by the preparation method, wherein the aluminum-titanium-carbon alloy grain refiner comprises Al and TiC particles, and the size of the TiC particles is 10-100nm.
Compared with the prior art, the invention has the beneficial effects that:
(1) In order to increase the reactivity between graphite and aluminum, on one hand, copper-plated graphite powder is used for enhancing the wettability between graphite and Al and improving the bonding performance between the graphite and the Al; the principle is that the graphite powder is a nonmetallic material, the wettability between the graphite powder and metal is poor, and after copper plating is carried out on the surface of the graphite, the graphite powder is better combined with Al through intermediate copper, so that the combination between the graphite and the Al is indirectly enhanced; on the other hand, by adding the sintering process of the spark plasma sintering furnace and adding Al powder into the mixed powder in advance, the diffusion sintering effect is formed between the copper-plated graphite powder and the Al, so that the copper-plated graphite powder can better react in the subsequent reaction, and the efficiency of the melt reaction is improved.
(2) The mixed powder prepared by the invention contains Al powder and K powder 2 TiF 6 And NaCl, copper-plated graphite powder and Sr powder, and the materials are easy to obtain and have low price. K when the preform is added to the molten aluminum in a subsequent reaction 2 TiF 6 Ti element generated by decomposition enters Al, copper plating graphite powder also enters Al, tiC is generated by Ti and graphite in a high-temperature molten aluminum environment, and the copper plating graphite can enable the graphite to enter the Al better; the Sr powder is added at the moment to improve the generation effect of the process; cu and Sr remain in the final grain refiner, but the content is small, and Cu reacts with Al to generate Al 2 The Cu intermediate compound has better improvement on the hardness and strength of the material; sr belongs to rare earth elements, can refine grains, improves the strength and hardness of the material and has an improvement effect on the performance of the material.
(3) According to the invention, the mixture is mixed by mechanical stirring and ultrasonic stirring, so that agglomeration of TiC particles in an Al melt can be avoided; the ultrasonic stirring can promote the generation efficiency of TiC and reduce the size of TiC, and has obvious improvement effect on the refiner.
Drawings
FIG. 1 is a microstructure photograph of the Al-Ti-C-Sr grain refiner prepared in example 1.
FIG. 2 is a microstructure photograph of the Al-Ti-C-Sr grain refiner prepared in example 2.
Detailed Description
The invention will be further illustrated with reference to examples. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Detection method
The sample is polished on sand paper, polished on a polishing machine, and the microstructure and morphology of the material are observed under a scanning electron microscope, wherein the magnification is 1-10 ten thousand times, and the model of the used equipment is Zeiss sigma 300.
Example 1
A preparation method of an Al-Ti-C-Sr grain refiner comprises the following steps of
(1) Adding 5g of graphite powder into 500ml of ethanol at the ambient temperature of 25 ℃, and stirring for 10min by using ultrasonic waves; adding 5g Tween 60 and 80g Cu (NO) 3 ) 2 ·3H 2 O and 50g of C 6 H 12 O 6 ·H 2 O, stir for 2 hours. And then drying the mixed powder, cleaning the mixed powder by deionized water, and drying the mixed powder again to obtain the copper-plated graphite powder.
(2) Weighing the following substances in percentage by mass: 50g of Al powder and 30g of K 2 TiF 6 10g of NaCl, 8g of copper-plated graphite powder and 2g of Sr powder, then adding the materials into 300ml of ethanol, and mechanically stirring for 30min at a rotating speed of 280 rpm; continuing ultrasonic stirring for 15min, wherein the ultrasonic power is 500W, and obtaining a mixture;
(3) Placing the mixture into an oven, preserving heat at 100 ℃ for 2 hours, drying to obtain mixed powder, and pressing the mixed powder into a block sample under the pressure of 50 Mpa; placing the block sample in a temperature of 200 ℃ for heat preservation for 2 hours to preheat, and obtaining a preheated sample;
(4) Placing the sample block obtained in the step (3) into a discharge plasma sintering furnace, sintering at 800 ℃ and under the pressure of 12MPa for 2min, and taking out;
(5) Heating the pure aluminum block to 1000 ℃ and preserving heat, adding the sintered sample in the step (4) into molten aluminum, mechanically stirring and ultrasonically stirring to uniformly mix the sintered sample, wherein the ultrasonic stirring power is 500W, the time is 10min, taking out surface scum, and pouring the obtained product into a mould to form the Al-Ti-C-Sr alloy.
The product obtained in example 1 was polished and polished, and then observed by a scanning electron microscope, and a large amount of TiC particles were present in the product, which were uniformly distributed among Al grains, and the size was 10-100nm, as shown in FIG. 1.
Example 2
A preparation method of an Al-Ti-C-Sr grain refiner comprises the following steps of
(1) Adding 5g of graphite powder into 500ml of ethanol at the ambient temperature of 25 ℃, and stirring for 10min by using ultrasonic waves; adding 5g Tween 60 and 80g Cu (NO) 3 ) 2 ·3H 2 O and 50g of C 6 H 12 O 6 ·H 2 O, stir for 2 hours. And then drying the mixed powder, cleaning the mixed powder by deionized water, and drying the mixed powder again to obtain the copper-plated graphite powder.
(2) Weighing the following substances in percentage by mass: 50g of Al powder and 25g of K 2 TiF 6 15g of NaCl, 8g of copper-plated graphite powder and 2g of Sr powder, then adding the materials into 300ml of ethanol, and mechanically stirring for 30min at a rotating speed of 280 rpm; continuing ultrasonic stirring for 15min, wherein the ultrasonic power is 500W, and obtaining a mixture;
(3) Placing the mixture into an oven, preserving heat at 100 ℃ for 2 hours, drying to obtain mixed powder, and pressing the mixed powder into a block sample under the pressure of 50 Mpa; placing the block sample in a temperature of 200 ℃ for heat preservation for 2 hours to preheat, and obtaining a preheated sample;
(4) Placing the sample block obtained in the step (3) into a discharge plasma sintering furnace, sintering at 800 ℃ and under the pressure of 12MPa for 2min, and taking out;
(5) Heating the pure aluminum block to 1000 ℃ and preserving heat, adding the sintered sample in the step (4) into molten aluminum, mechanically stirring and ultrasonically stirring to uniformly mix the sintered sample, wherein the ultrasonic stirring power is 500W, the time is 10min, taking out surface scum, and pouring the obtained product into a mould to form the Al-Ti-C-Sr alloy.
The product obtained in example 2 was polished and polished, and then observed by a scanning electron microscope, and a large amount of TiC particles were present in the product, which were uniformly distributed among Al grains, and the size was 10-100nm, as shown in FIG. 2.
Example 3
A preparation method of an Al-Ti-C-Sr grain refiner comprises the following steps of
(1) Adding 5g of graphite powder into 500ml of ethanol at the ambient temperature of 25 ℃, and stirring for 10min by using ultrasonic waves; adding 5g Tween 60 and 80g Cu (NO) 3 ) 2 ·3H 2 O and 50g of C 6 H 12 O 6 ·H 2 O, stir for 2 hours. And then drying the mixed powder, cleaning the mixed powder by deionized water, and drying the mixed powder again to obtain the copper-plated graphite powder.
(2) Weighing the following substances in percentage by mass: 50g of Al powder and 25g of K 2 TiF 6 15g of NaCl, 8g of copper-plated graphite powder and 2g of Sr powder, then adding the materials into 300ml of ethanol, and mechanically stirring for 30min at a rotating speed of 280 rpm; continuing ultrasonic stirring for 15min, wherein the ultrasonic power is 500W, and obtaining a mixture;
(3) Placing the mixture into an oven, preserving heat at 100 ℃ for 2 hours, drying to obtain mixed powder, and pressing the mixed powder into a block sample under the pressure of 50 Mpa; placing the block sample in a temperature of 200 ℃ for heat preservation for 2 hours to preheat, and obtaining a preheated sample;
(4) Placing the sample block obtained in the step (3) into a discharge plasma sintering furnace, sintering at 1000 ℃ and 18MPa for 2min, and taking out;
(5) Heating the pure aluminum block to 1000 ℃ and preserving heat, adding the sintered sample in the step (4) into molten aluminum, mechanically stirring and ultrasonically stirring to uniformly mix the sintered sample, wherein the ultrasonic stirring power is 500W, the time is 10min, taking out surface scum, and pouring the obtained product into a mould to form the Al-Ti-C-Sr alloy.
The product obtained in example 3 was polished and polished, and then observed by a scanning electron microscope, and a large amount of TiC particles were present in the product, which were uniformly distributed among Al grains, and the size was 10-100nm.
Example 4
A preparation method of an Al-Ti-C-Sr grain refiner comprises the following steps of
(1) Adding 5g of graphite powder into 500ml of ethanol at the ambient temperature of 25 ℃, and stirring for 10min by using ultrasonic waves; adding 5g Tween 60 and 80g Cu (NO) 3 ) 2 ·3H 2 O and 50g of C 6 H 12 O 6 ·H 2 O, stir for 2 hours. And then drying the mixed powder, cleaning the mixed powder by deionized water, and drying the mixed powder again to obtain the copper-plated graphite powder.
(2) Weighing the following substances in percentage by mass: 50g of Al powder and 25g of K 2 TiF 6 15g of NaCl, 8g of copper-plated graphite powder and 2g of Sr powder, then adding the materials into 300ml of ethanol, and mechanically stirring for 30min at a rotating speed of 280 rpm; continuing ultrasonic stirring for 15min, wherein the ultrasonic power is 500W, and obtaining a mixture;
(3) Placing the mixture into an oven, preserving heat at 100 ℃ for 2 hours, drying to obtain mixed powder, and pressing the mixed powder into a block sample under 150Mpa pressure; placing the block sample in a temperature of 200 ℃ for heat preservation for 2 hours to preheat, and obtaining a preheated sample;
(4) Placing the sample block obtained in the step (3) into a discharge plasma sintering furnace, sintering at 1000 ℃ and 18MPa for 2min, and taking out;
(5) Heating the pure aluminum block to 1000 ℃ and preserving heat, adding the sintered sample in the step (4) into molten aluminum, mechanically stirring and ultrasonically stirring to uniformly mix the sintered sample, wherein the ultrasonic stirring power is 500W, the time is 20min, taking out surface scum, and pouring the obtained product into a mould to form the Al-Ti-C-Sr alloy.
From the above examples, it can be seen that by rapidly increasing the melt temperature, the formation of TiC particles is reduced from 100-200nm to 10-100nm, enabling the controlled preparation of TiC particles. Meanwhile, as can be seen from SEM microscopic pictures, the prepared TiC particles are uniformly distributed, and have no agglomeration phenomenon, and have good effect on refining aluminum alloy.
Comparative example 1:
the preparation method of the aluminum-titanium-carbon alloy grain refiner for the vehicle comprises the following steps of
Comparative example 1 differs from example 1 in that the formulation in step (2) was 70g of Al powder, 10g of K 2 TiF 6 10g of NaCl, 8g of copper-plated graphite powder and 2g of Sr powder;
the product prepared in the comparative example 1 is polished and then observed by adopting a scanning electron microscope, tiC particles in the product are rare, and the generation efficiency is greatly reduced; here K 2 TiF 6 Too little content provides insufficient Ti element, resulting in less TiC formation.
Comparative example 2:
the preparation method of the aluminum-titanium-carbon alloy grain refiner for the vehicle comprises the following steps of
Comparative example 2 differs from example 1 in that the melt temperature in step (5) was 800 ℃;
the product obtained in comparative example 2 was polished and then observed by a scanning electron microscope, and TiC particles were not found in the product.
Comparative example 3
The difference of this comparative example from example 1 is that the preparation step of copper-plated graphite powder in step (1) was omitted, and the copper-plated graphite powder in step (2) was replaced with graphite powder, and the other process conditions were the same as in example 1.
The product prepared in comparative example 3 was polished and then observed by a scanning electron microscope, and found that TiC was agglomerated on the grain boundaries of Al crystal grains, and a structure with good dispersion of particles was not formed.
Comparative example 4
The difference between this comparative example and example 1 is that Al powder was not added in step (2), and the other process conditions were the same as in example 1.
The product prepared in comparative example 4 was polished and polished, and then observed by a scanning electron microscope, and found that the amount of TiC generated was small.
Comparative example 5
The difference between this comparative example and example 1 is that Sr powder is not added in step (2), and the other process conditions are the same as those in example 1.
The product prepared in comparative example 5 was polished and polished, and then observed by a scanning electron microscope, and found that the TiC particles were less in content.
Comparative example 6
The comparative example was different from example 1 in that step (4) was omitted and the preheated sample obtained in step (3) was directly subjected to the operation in step (5), and the other process conditions were the same as in example 1.
The product prepared in comparative example 6 was polished and then observed by a scanning electron microscope, and found that the amount of TiC particles generated was small.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those having ordinary skill in the art that various modifications can be readily made to the embodiments and the generic principles described herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (10)
1. The preparation method of the Al-Ti-C-Sr grain refiner is characterized by comprising the following steps of:
al powder, K 2 TiF 6 Adding NaCl, copper-plated graphite powder and Sr powder into a dispersing agent, mechanically stirring, and performing ultrasonic dispersion to obtain a mixture;
drying the mixture to obtain mixed powder, pressing the mixed powder into a block sample, and preheating to obtain a preheated sample;
placing the preheated sample into a discharge plasma sintering furnace for sintering to obtain a preform;
heating the pure aluminum block to melt the pure aluminum block to obtain molten aluminum; adding the preform into molten aluminum and uniformly mixing the preform to obtain a mixture; and (3) taking out the surface scum of the mixture after heat preservation treatment, and pouring the mixture into a die to form a target product.
2. The method for producing Al-Ti-C-Sr grain refiner according to claim 1, wherein the copper-plated graphite powder is produced by: dispersing graphite powder into ethanol to obtain a mixed solution, and adding Tween 60, copper salt and C into the mixed solution 6 H 12 O 6 ·H 2 And O, drying after fully stirring, cleaning, and drying again to obtain the copper-plated graphite powder.
3. The method for producing Al-Ti-C-Sr grain refiner according to claim 2, wherein the dispersant is ethanol; the copper salt is copper nitrate.
4. The method for producing Al-Ti-C-Sr grain refiner according to claim 1, wherein the Al powder, K 2 TiF 6 The mass ratio of NaCl, copper-plated graphite powder and Sr powder is 40-50:20-30:10-15:5-10:2-3.
5. The method for producing Al-Ti-C-Sr grain refiner according to claim 1, wherein the pressing pressure is 50-200MPa.
6. The method for producing Al-Ti-C-Sr grain refiner according to claim 1, characterized in that the temperature in the spark plasma sintering furnace is 800 ℃ to 1000 ℃ and the pressure is 12MPa to 18MPa.
7. The method of producing Al-Ti-C-Sr grain refiner according to claim 1, characterized in that the temperature of the molten aluminum is 1000-1200 ℃.
8. The method for producing Al-Ti-C-Sr grain refiner according to claim 1, wherein the material of the mold is iron or copper.
9. The method for producing Al-Ti-C-Sr grain refiner according to claim 1, wherein the method of adding the sintered sample to the molten aluminum and mixing them uniformly is mechanical stirring and ultrasonic stirring.
10. An Al-Ti-C-Sr grain refiner, characterized in that it is obtained by the preparation method according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311868503.6A CN117867313A (en) | 2023-12-28 | 2023-12-28 | Al-Ti-C-Sr grain refiner and preparation method thereof |
Applications Claiming Priority (1)
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