CN110564997A - Aluminum-titanium-molybdenum intermediate alloy and preparation method thereof - Google Patents
Aluminum-titanium-molybdenum intermediate alloy and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an aluminum-titanium-molybdenum intermediate alloy which comprises 50.0-55.0% of molybdenum, 1.0-5.0% of titanium and the balance of aluminum by mass, wherein the preparation method of the aluminum-titanium-molybdenum intermediate alloy comprises the steps of uniformly mixing aluminum, molybdenum trioxide and calcium fluoride, adding the mixture into a reaction crucible to carry out aluminothermic reaction to obtain an alloy liquid, and cooling the alloy liquid to obtain the aluminum-molybdenum intermediate alloy; uniformly mixing the aluminum-molybdenum intermediate alloy and the sponge titanium, then loading the mixture into a melting crucible, vacuumizing, filling argon, melting, refining after all the materials are melted to obtain alloy liquid, casting and cooling to obtain the alloy liquid. The aluminum-titanium-molybdenum intermediate alloy prepared by the method has the advantages of uniform components, small segregation and low impurity content.
Description
Technical Field
The invention relates to the technical field of metal materials, in particular to an aluminum-titanium-molybdenum intermediate alloy and a preparation method thereof.
background
Titanium and its alloy have excellent performance as important strategic materials, such as corrosion resistance, high temperature resistance, low temperature resistance, high strength, non-magnetism, etc., have good process comprehensive properties at the same time, gradually become irreplaceable materials in the field of modern industrial science and technology, and have wide application in the fields of aerospace industry, ship manufacturing industry, chemical industry, electric power industry, metallurgy industry, textile industry, food industry, medical industry, vehicle manufacturing industry, sports and leisure industry, etc.
With the continuous development of the titanium alloy industry, more and more metals are added into the titanium alloy in the form of intermediate alloy, the trouble of respectively adding metal simple substances is avoided, the proportion of alloy elements in the final alloy can be better controlled by adding the intermediate alloy, the alloying condition is improved, the uniformity of alloy components is improved, segregation is overcome, and insoluble inclusions are removed.
molybdenum is an alloy element widely applied to titanium alloy, the lattice types of molybdenum and beta titanium are the same, the molybdenum and the beta titanium can be infinitely and fixedly dissolved in the beta titanium, no compound phase exists, the phase change point can be reduced, the molybdenum and the beta titanium are isomorphous beta stable elements, the molybdenum has a remarkable solid solution strengthening effect, the alloy strength is improved, good plasticity can be kept, and the stability of the titanium alloy can be improved.
The melting point of the molybdenum is 2617 ℃, which is 1.57 times of that of the matrix Ti, and the density is 10.2g/cm32.3 times of matrix titanium, if the titanium is added in the form of pure metal, the tail end of the electrode is in a solid state and falls into a molten pool due to the fact that the temperature of the tail end of the electrode is lower than the melting point of molybdenum during consumable arc melting, the superheat degree and the alloying action time of the molten pool are limited, and high-density molybdenum inclusions are easily formed in an ingot. To prevent the possible high density inclusion of molybdenum in titanium alloys, molybdenum is usually added as an intermediate alloy, and the molybdenum elements in most titanium alloys are Mo: al 60: 40 master alloy, but mature moly-al 60: the reaction heat effect of the 40 intermediate alloy is large, and meanwhile, the potential risk of high-density inclusion of refractory molybdenum still exists.
after the aluminum-titanium-molybdenum intermediate alloy is used as a molybdenum element additive in the smelting of the titanium alloy, the material defects of the titanium alloy, such as molybdenum segregation, molybdenum inclusion and the like, can be well eliminated, the mechanical property of the titanium alloy is improved, and the requirements of the fields of aerospace and the like on the performance of the titanium alloy are met.
Therefore, the problem to be solved by those skilled in the art is how to provide an al-ti-mo intermediate alloy with uniform and stable components and low impurity content.
Disclosure of Invention
In view of the above, the invention provides a method for preparing an aluminum-titanium-molybdenum intermediate alloy by an aluminothermic process, and the aluminum-titanium-molybdenum intermediate alloy with small segregation, uniform and stable components and low impurity content can be obtained by adopting the preparation method provided by the invention.
In order to achieve the purpose, the invention adopts the following technical scheme:
an Al-Ti-Mo intermediate alloy comprises, by mass, 50.0-55.0% of Mo, 1.0-5.0% of Ti, and the balance of Al.
preferably, the above-mentioned one of the aluminum-titanium-molybdenum master alloys includes, by mass, 52.0 to 54.0% of Mo, 2.0 to 4.0% of Ti, and the balance of Al.
Preferably, in the above-mentioned one kind of aluminum-titanium-molybdenum master alloy, 53.0% of Mo, 3.0% of Ti, and the balance of Al are included by mass.
The invention also provides a preparation method of the aluminum-titanium-molybdenum intermediate alloy, which comprises the following steps:
(1) Uniformly mixing aluminum, molybdenum trioxide and calcium fluoride to obtain a mixed material, wherein the aluminum is used as a reducing agent, the molybdenum trioxide is used as an oxidizing agent, and the calcium fluoride is used as a slagging agent;
(2) Adding the mixed material obtained in the step (1) into a reaction crucible, and carrying out aluminothermic reaction to obtain an alloy liquid;
(3) cooling the alloy liquid obtained in the step (2) to obtain an aluminum-molybdenum intermediate alloy;
(4) Uniformly mixing the aluminum-molybdenum intermediate alloy and the sponge titanium according to the proportion to obtain a mixed material;
(5) putting the mixed material obtained in the step (4) into a melting crucible, vacuumizing, filling argon, melting, and refining after the materials are completely melted to obtain alloy liquid;
(6) and (5) casting and cooling the alloy liquid obtained in the step (5) to obtain the aluminum-titanium-molybdenum intermediate alloy.
Preferably, in the above method for preparing an aluminum-titanium-molybdenum intermediate alloy, the mass ratio of aluminum to molybdenum trioxide in step (1) is (1.495-1.560): (1.515-1.735), wherein the addition amount of the calcium fluoride is 6-10% of the total mass of the aluminum and the molybdenum trioxide.
The beneficial effects of the above technical scheme are: according to the content of the elements set by the alloy, the content of Mo in the molybdenum-aluminum alloy obtained by the thermit method is higher than that of the Mo in the final alloy aluminum-titanium-molybdenum alloy, otherwise, after Ti is added, the content of the Mo is lower than the set value.
preferably, in the above method for preparing an aluminum-titanium-molybdenum intermediate alloy, the mass ratio of the aluminum-molybdenum alloy to the titanium sponge in step (4) is (1.00-5.00): (95.00-99.00).
Preferably, in the above method for preparing an aluminum-titanium-molybdenum intermediate alloy, in step (1), the aluminum, the molybdenum trioxide and the calcium fluoride are all in powder form.
Preferably, in the above method for preparing an aluminum-titanium-molybdenum intermediate alloy, in the step (4), the aluminum-molybdenum alloy is in a block shape, and the titanium sponge is in a powder shape.
The beneficial effects of the above technical scheme are: the aluminum-molybdenum alloy is blocky and can meet smelting conditions, and meanwhile, the molybdenum-aluminum alloy is blocky and can reduce processing procedures and prevent the increase of the O content in the alloy in the process of preparing powder.
preferably, in the above method for preparing an aluminum-titanium-molybdenum intermediate alloy, before mixing in step (1), aluminum, molybdenum trioxide and calcium fluoride are dried, and before mixing in step (4), an aluminum-molybdenum alloy and titanium sponge are dried; in the step (2) and the step (4), the drying temperature is 120 +/-2 ℃, and the drying time is 12-20 h.
The beneficial effects of the above technical scheme are: the drying process mainly removes water in the raw materials, the drying temperature is too low, the raw materials are not thoroughly dried, the temperature is too high, the operation is not easy when the raw materials are manually weighed and mixed, and meanwhile, the resource waste is caused.
Preferably, in the above method for preparing an aluminum-titanium-molybdenum intermediate alloy, the reaction crucible in step (2) is a crucible made of magnesia bricks.
the beneficial effects of the above technical scheme are: the reaction crucible is used by an aluminothermic method, mainly adopts magnesia bricks, has high refractoriness, low cost and convenient use, and can not influence the alloy quality in the smelting process.
Preferably, in the above method for preparing an aluminum-titanium-molybdenum intermediate alloy, the melting crucible in step (5) is a corundum crucible.
preferably, in the above preparation method of the aluminum-titanium-molybdenum intermediate alloy, in the step (5), the refining temperature is 1450 to 1650 ℃, the refining time is 5 to 10min, and more preferably, the refining temperature is 1540 to 1560 ℃, and the refining time is 6 to 8 min.
The beneficial effects of the above technical scheme are: alloy refining can enable the alloy uniformity to be better, gas phase impurities in the alloy are further discharged, if the refining temperature is too low, the expected refining effect cannot be achieved, and if the refining temperature is too high, the alloy loss can be increased.
Preferably, in the above method for preparing an aluminum-titanium-molybdenum intermediate alloy, the degree of vacuum in step (5) is 5 to 10 Pa.
the beneficial effects of the above technical scheme are: the main function of vacuumizing is to exhaust impurities in the furnace and prevent gas phase impurities in the air from entering the alloy. If the vacuum degree is higher than 10Pa, the air in the furnace is more, gas-phase impurities are easily introduced into the alloy, and the vacuum degree is lower than 5Pa, so that the equipment can not meet the requirement.
Preferably, in the preparation method of the aluminum-titanium-molybdenum intermediate alloy, the cooling time in the step (6) is more than or equal to 6 hours.
the beneficial effects of the above technical scheme are: the alloy needs to be cooled for more than 6 hours in a vacuum state, because if the cooling time of the alloy is too short, the temperature of the alloy after discharging is too high, and the alloy is easy to oxidize and nitrify in the air.
According to the technical scheme, compared with the prior art, the invention discloses the preparation method of the aluminum-titanium-molybdenum intermediate alloy, the aluminum-titanium-molybdenum intermediate alloy is prepared by adopting a two-step method, the aluminum-titanium-molybdenum intermediate alloy with uniform and stable chemical components, small segregation, low impurity content and high purity can be obtained, and the preparation method provided by the invention is simple, easy to control and suitable for large-scale industrial production.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
The embodiment 1 of the invention discloses a preparation method of an aluminum-titanium-molybdenum intermediate alloy, which adopts the following technical scheme:
The preparation method of the aluminum-titanium-molybdenum intermediate alloy comprises the following specific steps:
1. Drying aluminum powder, molybdenum trioxide and calcium fluoride at the drying temperature: 118 ℃, drying time: 20 hours;
2. The raw material ratio is as follows: 78.00kg of aluminum, 75.75kg of molybdenum trioxide and 9.23kg of calcium fluoride, and the raw materials are put into a V-shaped mixer and are fully and uniformly mixed to ensure that the raw materials are fully contacted;
3. Loading the uniformly mixed furnace burden into a built magnesia brick crucible, carrying out ignition reaction, cooling for 6 hours, removing the furnace, taking out an alloy ingot, and weighing;
4. removing a slag layer and an oxidation film on the surface of the alloy ingot, crushing and finishing to 5-20mm, and carrying out magnetic separation and manual selection to obtain an aluminum-molybdenum intermediate alloy;
5. Drying the aluminum-molybdenum intermediate alloy and the titanium sponge, wherein the drying temperature is as follows: 118 ℃, drying time: 20 hours;
6. the raw material ratio is as follows: 99.00kg of aluminum-molybdenum alloy and 1.00kg of sponge titanium, uniformly mixing the aluminum-molybdenum alloy and the sponge titanium, putting the mixture into a knotted and dried corundum crucible, vacuumizing a medium-frequency vacuum induction smelting furnace to 10Pa, and removing gas impurities in the smelting furnace;
7. filling argon into a vacuum smelting furnace to 10 kilopascals, slowly increasing the smelting power until the alloy is molten, refining at 1650 ℃ for 5 minutes after the furnace burden is completely molten, vacuumizing the smelting furnace to 10 pascals again, and removing gas impurities in the melt;
8. adjusting the smelting power, controlling the temperature, inclining the crucible, and slowly and stably casting the solution into the water-cooled crucible. After the casting is finished, the vacuum cooling is kept for more than 6 hours.
9. The chemical composition analysis of the Al-Ti-Mo master alloy prepared in this example is shown in Table 1.
Example 2:
the embodiment 2 of the invention discloses a preparation method of an aluminum-titanium-molybdenum intermediate alloy, which adopts the following technical scheme:
the preparation method of the aluminum-titanium-molybdenum intermediate alloy comprises the following specific steps:
1. drying aluminum powder, molybdenum trioxide and calcium fluoride at the drying temperature: 119 ℃, drying time: 18 hours;
2. The raw material ratio is as follows: 76.69kg of aluminum, 79.59kg of molybdenum trioxide and 10.94kg of calcium fluoride, and the raw materials are put into a V-shaped mixer and are fully and uniformly mixed to ensure that the raw materials are fully contacted;
3. Loading the uniformly mixed furnace burden into a built magnesia brick crucible, carrying out ignition reaction, cooling for 6 hours, removing the furnace, taking out an alloy ingot, and weighing;
4. removing a slag layer and an oxidation film on the surface of the alloy ingot, crushing and finishing to 5-20mm, and carrying out magnetic separation and manual selection to obtain an aluminum-molybdenum intermediate alloy;
5. drying the aluminum-molybdenum intermediate alloy and the titanium sponge, wherein the drying temperature is as follows: 119 ℃, drying time: 18 hours;
6. The raw material ratio is as follows: 98.00kg of aluminum-molybdenum alloy and 2.00kg of sponge titanium, uniformly mixing the aluminum-molybdenum alloy and the sponge titanium, putting the mixture into a knotted and dried corundum crucible, vacuumizing a medium-frequency vacuum induction smelting furnace to 8 Pa, and removing gas impurities in the smelting furnace;
7. filling argon into a vacuum smelting furnace to 10 kilopascals, slowly increasing the smelting power until the alloy is molten, refining at 1560 ℃ for 6 minutes after the furnace burden is completely molten, vacuumizing the smelting furnace to 8 pascals again, and removing gas impurities in the melt;
8. Adjusting the smelting power, controlling the temperature, inclining the crucible, slowly and stably casting the solution into a water-cooled crucible, and after the casting is finished, keeping vacuum cooling for more than 6 hours;
9. The chemical composition analysis of the Al-Ti-Mo master alloy prepared in this example is shown in Table 1.
example 3:
the embodiment 3 of the invention discloses a preparation method of an aluminum-titanium-molybdenum intermediate alloy, which adopts the following technical scheme:
the preparation method of the aluminum-titanium-molybdenum intermediate alloy comprises the following specific steps:
1. Drying aluminum powder, molybdenum trioxide and calcium fluoride at the drying temperature: drying at 120 ℃ for a drying time: 16 hours;
2. The raw material ratio is as follows: 76.10kg of aluminum, 81.96kg of molybdenum trioxide and 12.64kg of calcium fluoride, and the raw materials are put into a V-shaped mixer and are fully and uniformly mixed to ensure that the raw materials are fully contacted;
3. loading the uniformly mixed furnace burden into a built magnesia brick crucible, carrying out ignition reaction, cooling for 6 hours, removing the furnace, taking out an alloy ingot, and weighing;
4. removing a slag layer and an oxidation film on the surface of the alloy ingot, crushing and finishing to 5-20mm, and carrying out magnetic separation and manual selection to obtain an aluminum-molybdenum intermediate alloy;
5. drying the aluminum-molybdenum intermediate alloy and the titanium sponge, wherein the drying temperature is as follows: drying at 120 ℃ for a drying time: 16 hours;
6. The raw material ratio is as follows: 97.00kg of aluminum-molybdenum alloy and 3.00kg of sponge titanium, uniformly mixing the aluminum-molybdenum alloy and the sponge titanium, putting the mixture into a knotted and dried corundum crucible, vacuumizing a medium-frequency vacuum induction smelting furnace to 8 Pa, and removing gas impurities in the smelting furnace;
7. filling argon into a vacuum smelting furnace to 10 kilopascals, slowly increasing the smelting power until the alloy is molten, refining at 1550 ℃ for 7 minutes after furnace burden is completely molten, vacuumizing the smelting furnace to 8 pascals again, and removing gas impurities in the melt;
8. adjusting the smelting power, controlling the temperature, inclining the crucible, slowly and stably casting the solution into a water-cooled crucible, and after the casting is finished, keeping vacuum cooling for more than 6 hours;
9. the chemical composition analysis of the Al-Ti-Mo master alloy prepared in this example is shown in Table 1.
The al-ti-mo intermediate alloy ingot (cylinder) prepared in this example was sampled and subjected to chemical composition analysis, two points (1, 2) were taken from the upper surface of the ingot, two points (3, 4) were taken from the lower surface of the ingot, and two points (5, 6) were taken from the middle portion of the ingot to be subjected to composition analysis, and the results are shown in table 2. As can be seen from Table 2, the master alloy prepared by the embodiment has uniform components, no segregation and low impurity content.
Example 4:
The embodiment 4 of the invention discloses a preparation method of an aluminum-titanium-molybdenum intermediate alloy, which adopts the following technical scheme:
the preparation method of the aluminum-titanium-molybdenum intermediate alloy comprises the following specific steps:
1. drying aluminum powder, molybdenum trioxide and calcium fluoride at the drying temperature: and (3) drying at 121 ℃ for: 14 hours;
2. the raw material ratio is as follows: 75.39kg of aluminum, 84.38kg of molybdenum trioxide and 14.38kg of calcium fluoride, and the raw materials are put into a V-shaped mixer and are fully and uniformly mixed, so that the raw materials are fully contacted;
3. Loading the uniformly mixed furnace burden into a built magnesia brick crucible, carrying out ignition reaction, cooling for 6 hours, removing the furnace, taking out an alloy ingot, and weighing;
4. Removing a slag layer and an oxidation film on the surface of the alloy ingot, crushing and finishing to 5-20mm, and carrying out magnetic separation and manual selection to obtain an aluminum-molybdenum intermediate alloy;
5. drying the aluminum-molybdenum intermediate alloy and the titanium sponge, wherein the drying temperature is as follows: and (3) drying at 121 ℃ for: 14 hours;
6. the raw material ratio is as follows: 96.00kg of aluminum-molybdenum alloy and 4.00kg of sponge titanium, uniformly mixing the aluminum-molybdenum alloy and the sponge titanium, putting the mixture into a knotted and dried corundum crucible, vacuumizing a medium-frequency vacuum induction smelting furnace to 6 Pa, and removing gas impurities in the smelting furnace;
7. Filling argon into a vacuum smelting furnace to 10 kilopascals, slowly increasing the smelting power until the alloy is molten, refining at 1540 ℃ for 8 minutes after the furnace burden is completely molten, vacuumizing the smelting furnace to 6 pascals again, and removing gas impurities in the melt;
8. Adjusting the smelting power, controlling the temperature, inclining the crucible, and slowly and stably casting the solution into the water-cooled crucible. After the casting is finished, the vacuum cooling is kept for more than 6 hours.
9. The chemical composition analysis of the Al-Ti-Mo master alloy prepared in this example is shown in Table 1.
example 5:
the embodiment 5 of the invention discloses a preparation method of an aluminum-titanium-molybdenum intermediate alloy, which adopts the following technical scheme:
The preparation method of the aluminum-titanium-molybdenum intermediate alloy comprises the following specific steps:
1. drying aluminum powder, molybdenum trioxide and calcium fluoride at the drying temperature: and (3), drying time: 12 hours;
2. the raw material ratio is as follows: 74.75kg of aluminum, 86.75kg of molybdenum trioxide and 16.15kg of calcium fluoride, and the raw materials are put into a V-shaped mixer and are fully and uniformly mixed, so that the raw materials are fully contacted;
3. Loading the uniformly mixed furnace burden into a built magnesia brick crucible, carrying out ignition reaction, cooling for 6 hours, removing the furnace, taking out an alloy ingot, and weighing;
4. removing a slag layer and an oxidation film on the surface of the alloy ingot, crushing and finishing to 5-20mm, and carrying out magnetic separation and manual selection to obtain an aluminum-molybdenum intermediate alloy;
5. drying the aluminum-molybdenum alloy and the titanium sponge, wherein the drying temperature is as follows: and (3), drying time: 12 hours;
6. The raw material ratio is as follows: 95.00kg of aluminum-molybdenum alloy and 5.00kg of sponge titanium, uniformly mixing the aluminum-molybdenum alloy and the sponge titanium, putting the mixture into a knotted and dried corundum crucible, vacuumizing a medium-frequency vacuum induction smelting furnace to 5Pa, and removing gas impurities in the smelting furnace;
7. filling argon into a vacuum smelting furnace to 10 kilopascals, slowly increasing the smelting power until the alloy is molten, refining at 1450 ℃ for 10 minutes after the furnace burden is completely molten, vacuumizing the smelting furnace to 5 pascals again, and removing gas impurities in the melt;
8. adjusting the smelting power, controlling the temperature, inclining the crucible, slowly and stably casting the solution into a water-cooled crucible, and after the casting is finished, keeping vacuum cooling for more than 6 hours;
9. The chemical composition analysis of the Al-Ti-Mo master alloy prepared in this example is shown in Table 1.
TABLE 1 chemical composition of Al-Ti-Mo master alloy in examples 1-5 of this invention
| examples | Al％ | Mo％ | Ti％ | Fe％ | Si％ | C％ | O％ | N％ |
| Example 1 | Balance of | 50.00 | 1.00 | 0.24 | 0.18 | 0.06 | 0.16 | 0.06 |
| example 2 | balance of | 51.93 | 2.14 | 0.25 | 0.20 | 0.08 | 0.15 | 0.07 |
| Example 3 | balance of | 53.12 | 3.08 | 0.22 | 0.19 | 0.07 | 0.14 | 0.05 |
| Example 4 | Balance of | 54.07 | 3.96 | 0.24 | 0.20 | 0.06 | 0.15 | 0.06 |
| Example 5 | Balance of | 55.00 | 5.00 | 0.23 | 0.19 | 0.07 | 016 | 0.07 |
TABLE 2 chemical compositions of different positions of Al-Ti-Mo intermediate alloy in example 3 of this invention
the results show that the intermediate alloy prepared by the preparation method of the aluminum-titanium-molybdenum intermediate alloy has high purity, small segregation, uniform and stable components and low content of gas phase impurities, and can better meet the production requirement of the titanium alloy.
The preparation method provided by the invention is simple, easy to operate, free of special equipment, low in cost and good in alloy forming state, and takes aluminum, oxide and titanium sponge as raw materials.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. an Al-Ti-Mo master alloy is characterized by comprising 50.0-55.0% of Mo, 1.0-5.0% of Ti and the balance of Al by mass.
2. the Al-Ti-Mo master alloy according to claim 1, which comprises, by mass, 52.0-54.0% of Mo, 2.0-4.0% of Ti, and the balance of Al.
3. The Al-Ti-Mo master alloy according to claim 1 or 2, comprising 53.0% Mo, 3.0% Ti, and the balance Al, by mass.
4. a method for preparing an al-ti-mo master alloy according to any one of claims 1 to 3, comprising the steps of:
(1) Uniformly mixing aluminum, molybdenum trioxide and calcium fluoride to obtain a mixed material;
(2) adding the mixed material obtained in the step (1) into a reaction crucible, and carrying out aluminothermic reaction to obtain an alloy liquid;
(3) Cooling the alloy liquid obtained in the step (2) to obtain an aluminum-molybdenum intermediate alloy;
(4) uniformly mixing the aluminum-molybdenum intermediate alloy and the titanium sponge to obtain a mixed material;
(5) putting the mixed material obtained in the step (4) into a melting crucible, vacuumizing, filling argon, melting, and refining after the materials are completely melted to obtain alloy liquid;
(6) and (5) casting and cooling the alloy liquid obtained in the step (5) to obtain the aluminum-titanium-molybdenum intermediate alloy.
5. The preparation method according to claim 4, wherein the mass ratio of the aluminum to the molybdenum trioxide in the step (1) is (1.495-1.560): (1.515-1.735), wherein the addition amount of the calcium fluoride is 6-10% of the total mass of the aluminum and the molybdenum trioxide.
6. the preparation method according to claim 4, wherein the mass ratio of the aluminum-molybdenum master alloy to the titanium sponge in the step (4) is (1.00-5.00): (95.00-99.00).
7. the preparation method according to claim 4, characterized in that drying treatment is carried out before mixing in the step (1) and the step (4), the drying temperature is 120 +/-2 ℃, and the drying time is 12-20 h.
8. the preparation method according to claim 4, wherein the refining temperature in the step (5) is 1450-1650 ℃ and the refining time is 5-10 min.
9. the production method according to claim 4, wherein the degree of vacuum in the step (5) is 10Pa or less.
10. The process according to claim 4, wherein the cooling time in step (6) is not less than 6 hours.
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Denomination of invention: An Al Ti Mo master alloy and its preparation method Effective date of registration: 20220620 Granted publication date: 20201215 Pledgee: China Construction Bank Corporation Chengde high tech Zone sub branch Pledgor: CHENGDE TIANDA VANADIUM INDUSTRY Co.,Ltd. Registration number: Y2022130000037 |