CN111647765A - Method for improving apparent mass of AlV55 alloy - Google Patents
Method for improving apparent mass of AlV55 alloy Download PDFInfo
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- CN111647765A CN111647765A CN202010523351.6A CN202010523351A CN111647765A CN 111647765 A CN111647765 A CN 111647765A CN 202010523351 A CN202010523351 A CN 202010523351A CN 111647765 A CN111647765 A CN 111647765A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/058—Mixtures of metal powder with non-metallic powder by reaction sintering (i.e. gasless reaction starting from a mixture of solid metal compounds)
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/04—Dry methods smelting of sulfides or formation of mattes by aluminium, other metals or silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/02—Alloys based on vanadium, niobium, or tantalum
- C22C27/025—Alloys based on vanadium, niobium, or tantalum alloys based on vanadium
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Abstract
The invention provides a method for improving the apparent mass of an AlV55 alloy, which comprises the following steps: step 1: mixing vanadium pentoxide and aluminum particle raw materials uniformly according to a certain proportion; step 2: pouring the mixed materials into a reactor, igniting a magnesium strip to trigger reaction, and carrying out aluminothermic reduction smelting; and step 3: carrying out water cooling and/or air cooling on the reactor; and 4, step 4: introducing inert gas into the reactor for purging; and 5: and after cooling, performing sand blasting and crushing treatment to obtain an AlV55 alloy finished product. The method for preparing the AlV55 alloy can improve the apparent mass of the AlV55 alloy, so that the vanadium content in a finished product can be controlled to be 59-59.5%, and the alloy yield can be improved to more than 70%.
Description
Technical Field
The invention relates to the field of metallurgy, in particular to a method for improving the apparent mass of an AlV55 alloy.
Background
The vanadium-aluminum alloy is used as an important additive of titanium alloy, is commonly used for improving the performance of the titanium alloy, has more advantages in the aspects of strength, toughness, formability, corrosion resistance, high temperature resistance and the like, and is an important material for manufacturing seaplanes, gliders, automobile engine systems, automobile chassis parts, golf clubs and medical devices.
With the rapid development of the economy of China and the continuous improvement of the consumption level of people, the national defense strength and the space navigation strength of China are obviously enhanced, and the titanium alloy applied to the fields of civil industry and aerospace has a great growth tendency. China mainly adopts AlV55 alloy to prepare Ti-6Al-4V alloy, so the market demand is very large, but the apparent quality (especially the yield) of the AlV55 alloy prepared by a one-step method is generally not high at present, although the unqualified product can be taken as a coolant in a melting way, the loss of the total vanadium amount is not large, but the production cost is always high.
Based on this, the prior art still remains to be improved.
Disclosure of Invention
In order to solve the technical problems, the embodiment of the invention provides a method for improving the apparent mass of an AlV55 alloy, which can effectively solve the problems of low apparent mass and high cost of an AlV55 alloy prepared by a one-step method.
According to the invention, a method for improving the apparent mass of an AlV55 alloy is provided, which comprises the following steps:
step 1: mixing vanadium pentoxide and aluminum particle raw materials uniformly according to a certain proportion;
step 2: pouring the mixed materials into a reactor, igniting a magnesium strip to trigger reaction, and carrying out aluminothermic reduction smelting;
and step 3: carrying out water cooling and/or air cooling on the reactor;
and 4, step 4: introducing inert gas into the reactor for purging;
and 5: and after cooling, performing sand blasting and crushing treatment to obtain an AlV55 alloy finished product.
According to an embodiment of the invention, in the step 1, the weight ratio of the vanadium pentoxide to the aluminum particles is 1.12: 1-1.9: 1.
According to one embodiment of the invention, the vanadium pentoxide has a particle size of 120 mesh or less and the metallic Al has a particle size of 80 mesh or less.
According to one embodiment of the present invention, a certain amount of coolant may be added to the feedstock of step 1.
According to an embodiment of the invention, in the step 3, the water cooling and/or air cooling is carried out on the reactor 3-5 min after the reaction is finished, and the temperature of the reactor reaches 80-100 DEG℃And finishing water cooling and/or air cooling after the temperature is reached.
According to one embodiment of the invention, in the step 3, water cooling is carried out through cooling water pipes spirally arranged on the periphery of the reactor, and the diameter ratio of the cooling water pipes to the reactor is 1: 20-1: 10, the flow rate of the cooling water is 0.5 to 1 m/s.
According to one embodiment of the invention, in step 3, air cooling is performed by one or more cooling fans disposed near the reactor.
According to an embodiment of the invention, in the step 4, after the reaction is finished, inert gas is introduced into the upper part of the molten pool of the reactor for purging, wherein the inert gas introduction time is 5-8 hours.
According to one embodiment of the invention, in the step 4, the flow rate of the inert gas is kept between 1 and 5m3/h。
According to one embodiment of the invention, step 3 and step 4 are performed simultaneously.
By adopting the technical scheme, the invention at least has the following beneficial effects:
on the basis of one-step aluminothermic reduction, the invention adopts high-purity raw materials to reduce the intake of impurity elements, adopts water cooling and/or air cooling to control the phase change of the alloy, and adopts inert gas purging to prevent the oxidation and nitridation of the alloy, thereby improving the apparent quality of the AlV55 alloy, and particularly improving the yield of the AlV55 alloy to more than 70%. In addition, the method has the advantages of simple process, low equipment requirement, low cost and the like, can prepare the AlV55 alloy with the vanadium content controlled between 59 and 59.6 percent in high yield, and has wide market application prospect.
Drawings
FIG. 1 shows a process flow diagram of a method of improving the apparent mass of an AlV55 alloy according to the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.
The invention provides a method for improving the apparent mass of an AlV55 alloy, which comprises the following steps as shown in figure 1:
step 1: vanadium pentoxide (V)2O5) Mixing with aluminum (Al) particles in certain proportion;
step 2: pouring the mixed materials into a reactor, igniting a magnesium strip to trigger reaction, and carrying out aluminothermic reduction smelting;
and step 3: after the reaction is finished, carrying out water cooling and/or air cooling on the reactor;
and 4, step 4: after the reaction is finished, introducing inert gas into the reactor for purging;
and 5: and after cooling, performing sand blasting and crushing treatment to obtain an AlV55 alloy finished product.
In the step 1, vanadium pentoxide with the purity of not less than 99%, Si of not more than 0.15% and Fe of not more than 0.07% and aluminum particles with the purity of not less than 99% are adopted, and the adoption of high-purity raw materials is favorable for controlling the intake of impurity elements of the alloy, so that the quality of the AlV55 alloy meets the standard requirement. In the step 1, the weight ratio of vanadium pentoxide to aluminum particles is 1.12: 1-1.9: 1, and excessive aluminum particles are adopted, so that a vanadium-aluminum alloy can be formed by fusing the aluminum particles and metal vanadium in a reduction reaction process. In the step 1, preferably, the granularity of vanadium pentoxide is less than or equal to 160 meshes, and the granularity of metal Al is less than or equal to 120 meshes; more preferably, the particle size of the vanadium pentoxide is less than or equal to 120 meshes, and the particle size of the metal Al is less than or equal to 80 meshes, so that the uniform mixing of the raw materials, the full contact of the materials and the full reaction are ensured.
In the step 1, a certain amount of coolant can be added to reduce the unit furnace charge heat of the thermite reaction, so as to avoid serious splashing caused by over violent reaction, which is helpful for improving the safety. Preferably, AlV55 rejects can be used as coolant, which on the one hand contributes to cost reduction and on the other hand avoids the introduction of impurities. However, the present invention is not limited thereto, and other conventional coolants in the art, such as lime or fluorite, etc., may be used.
Wherein, in step 1, vanadium pentoxide and aluminium grain are packed into the material jar after weighing according to certain ratio misce bene, and this kind of mode compounding in-process material is lossless basically, can the accurate control material addition to because the material can make the material mix more evenly between the material of compounding in-process collision each other.
In the step 2, the mixed materials are poured into a reactor, and after the ignition magnesium tape triggers reaction, the mixed materials react in the reactor as follows: 3V2O5+10Al＝6V+5Ql2O3. In one embodiment, after the mixed material is poured into the reactor and laid flat, a magnesium strip may be inserted into the material, and the reaction triggered by ignition of the magnesium strip. Although in the above examples the reaction is initiated by igniting the magnesium strip, the invention is not so limited and the reaction may be initiated by other means conventional in the art, for example, by electrically striking a titanium wire.
In the step 3, water cooling and/or air cooling is carried out on the reactor 3-5 min after the reaction is finished so as to avoid the alloy phase from generating brittle phase and ensure complete separation of slag and gold. Specifically, the periphery of reactor can encircle to be equipped with condenser tube in the spiral, and the water inlet is located the downside, and it links to each other with the cooling water switch, and the delivery port is located the upside, and it links to each other with cooling water discharge pipe, and when consequently carrying out the water-cooling as required, through opening the cooling water switch, during water enters into condenser tube from the water inlet of downside, encircles the periphery of reactor, finally flows from the delivery port that is located the upside to play the purpose of cooling down the reactor. In order to carry out effective water cooling, the ratio of the diameter of the cooling water pipe to the diameter of the reactor is 1: 20-1: 10. for example, the reactor diameter is usually about 1m, and in this case, the diameter of the cooling water pipe may be setIs 5-10 cm. The flow rate of the cooling water can be 0.5-1 m/s, so that the reactor can be effectively cooled. One or more cooling fans may be provided adjacent the reactor to facilitate air cooling of the reactor. For example, one cooling fan may be disposed on each of opposite sides of the reactor, or more than two fans may be disposed around the reactor at intervals, so as to further improve the cooling efficiency. In actual operation, one or more cooling fans can be selectively turned on for cooling according to needs. The water cooling and/or air cooling operation can reach 80-100 in the reactor℃And then the process is ended, because the phase can not change basically, only natural cooling is needed, and the water cooling and/or air cooling is not needed to be continued, so that the cost is unnecessarily increased when the process is continued.
It should be noted here that whether the reaction is finished is judged according to whether sputtering occurs or not, the thermite reaction is generally severe and has a sputtering phenomenon, the reaction time is usually several minutes, and the reaction end time is usually judged according to whether sputtering does not occur on site.
Wherein, in step 4, immediately after the reaction is finished, inert gas is blown into the upper part of the melt of the reactor through a spray gun for purging, which helps to prevent air from entering the liquid alloy to cause oxidation and nitridation of the alloy. The inert gas can be argon, helium, neon and the like. In the reaction process, a large amount of smoke generated in the reaction can prevent air from entering the liquid alloy, so that inert gas does not need to be introduced in the reaction process, but once the reaction is finished, a large amount of smoke is not generated any more, the air can be close to the liquid alloy to cause pollution, and the inert gas needs to be introduced in time after the reaction is finished. The gas outlet of the spray gun can be arranged 5-10 cm away from the melt liquid level so as to effectively purge the melt. In addition, in order to further improve the purging effect, rotary purging may be performed.
In the step 4, inert gas is introduced for 5-8 hours to ensure that the alloy is not oxidized and nitrided due to air pollution. After the reaction is finished, the generated liquid alloy starts to be slowly cooled immediately, when the liquid alloy is cooled for 5-8 hours, the alloy on the outer side is basically solidified, the risks of oxidation and nitridation are basically avoided, the inert gas can be stopped from being introduced, the cost is reduced, and meanwhile waste is avoided. If the cooling time is insufficient and the inert gas feed is stopped prematurely, the risk of oxidation and nitridation of the alloy is greater.
Wherein, in the step 4, the flow rate of the inert gas is kept between 1 and 5m3H to ensure that the alloy is not contaminated by air causing oxidation and nitridation. The flow rate of the inert gas is in an optimal range, and the inert gas is not too small or too large, wherein the too small inert gas does not play a role in preventing the oxidation and the nitridation of the alloy, and the too large inert gas causes unnecessary waste and increases the cost.
Here, it should be noted that: the steps 3 and 4 may be performed simultaneously, or step 3 may be performed first and then step 4 may be performed, or step 4 may be performed first and then step 3 may be performed.
In step 5, after the reaction is finished, cooling for 24 hours, taking out the alloy cake from the reactor, removing corundum slag on the alloy cake, and if the alloy cake has a little slag, putting the alloy cake into a sand blasting machine to blast the whole alloy cake so as to minimize the loss of the alloy. The sand blasting can adopt iron sand and/or aluminum sand. And crushing the alloy cake after sand blasting to obtain an AlV55 alloy packaging finished product. The vanadium content of the AlV55 alloy is controlled to be 59-59.6%, when the crystallized phase of the alloy is more in a solid solution structure, the brittle phase is relatively less, and the alloy can generate less fine powder when being crushed.
Specific examples of the present invention are given below.
Example 1
Weighing high-purity V2O5150kg (granularity: 120-160 meshes) and 132.3kg of high-purity metal Al (granularity: 80-120 meshes) are put into a charging bucket, mixed uniformly and poured into a reactor, a magnesium tape is ignited to trigger reaction, cooling water is introduced 3min after the reaction is finished, the diameter of a cooling water pipe is 10cm, the flow rate is 0.5m/s, argon is blown in for protection, and the gas flow is 5m3And/h, blowing for 5h, opening the reactor after 24h, and performing sand blasting to obtain the AlV55 alloy with the V content of 59.4% and the yield of 70.3%.
Example 2
Weighing high-purity V2O5100kg (granularity is less than or equal to 120 meshes) of high-purity metal Al (granularity is 80-120 meshes) 87.7kg are put into a charging bucket, evenly mixed and poured into a reactor, a magnesium tape is ignited to trigger reaction, cooling water is introduced 4min after the reaction is finished, the diameter of a cooling water pipe is 8cm, the flow rate is 0.8m/s, argon is blown in for protection, and the gas flow is 3m3And/h, blowing for 7h, opening the reactor after 24h, and performing sand blasting to obtain the AlV55 alloy with the V content of 59.2% and the yield of 70.7%.
Example 3
Weighing high-purity V2O5200kg (granularity: 120-160 meshes) and 176kg of high-purity metal Al (granularity: less than or equal to 80 meshes) are put into a charging bucket, mixed uniformly and poured into a reactor, a magnesium tape is ignited to trigger reaction, cooling water is introduced 5min after the reaction is finished, the diameter of a cooling water pipe is 5cm, and the flow rate is 1 m/s. Argon gas is blown in for protection, and the gas flow is 1m3And/h, blowing time is 8h, the reactor is opened after 24h, and AlV55 alloy with V content of 59.5% and yield of 71.3% is obtained after sand blasting treatment.
Example 4
Weighing high-purity V2O5100kg (granularity is less than or equal to 120 meshes) of high-purity metal Al (granularity is less than or equal to 120 meshes) 87.7kg are put into a charging bucket, evenly mixed and poured into a reactor, a magnesium tape is ignited to trigger reaction, cooling water is introduced 4min after the reaction is finished, the diameter of a cooling water pipe is 8cm, the flow rate is 0.8m/s, argon is blown in for protection, and the gas flow is 3m3And/h, blowing for 7h, opening the reactor after 24h, and performing sand blasting to obtain the AlV55 alloy with the V content of 59.3% and the yield of 70.8%.
Example 5
Weighing high-purity V2O5100kg (granularity is less than or equal to 120 meshes) of high-purity metal Al (granularity is less than or equal to 120 meshes) 52.6kg are put into a charging bucket, evenly mixed and poured into a reactor, a magnesium tape is ignited to trigger reaction, cooling water is introduced 4min after the reaction is finished, the diameter of a cooling water pipe is 8cm, the flow rate is 0.8m/s, argon is blown in for protection, and the gas flow is 3m3And/h, blowing for 7h, opening the reactor after 24h, and performing sand blasting to obtain the AlV55 alloy with the V content of 59.5% and the yield of 70.6%.
The above examples show that the method for preparing the AlV55 alloy can improve the apparent mass of the AlV55 alloy, control the V content to be 59-59.5% and improve the yield of the AlV55 alloy to be more than 70%. It should be noted here that the term "alloy yield" in the present invention is defined as: the yield of the alloy is the weight of the packaged finished product/the weight of the alloy cake multiplied by 100 percent.
The above is an exemplary embodiment of the present disclosure, and the order of disclosure of the above embodiment of the present disclosure is only for description and does not represent the merits of the embodiment. It should be noted that the discussion of any embodiment above is exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to those examples, and that various changes and modifications may be made without departing from the scope, as defined in the claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of an embodiment of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.
Claims (10)
1. A method for improving the apparent mass of an AlV55 alloy, which is characterized by comprising the following steps:
step 1: mixing vanadium pentoxide and aluminum particle raw materials uniformly according to a certain proportion;
step 2: pouring the mixed materials into a reactor, igniting a magnesium strip to trigger reaction, and carrying out aluminothermic reduction smelting;
and step 3: carrying out water cooling and/or air cooling on the reactor;
and 4, step 4: introducing inert gas into the reactor for purging;
and 5: and after cooling, performing sand blasting and crushing treatment to obtain an AlV55 alloy finished product.
2. The method for improving the apparent mass of the AlV55 alloy according to claim 1, wherein in step 1, the weight ratio of vanadium pentoxide to aluminum particles is 1.12: 1-1.9: 1.
3. The method for improving the apparent mass of the AlV55 alloy according to claim 1, wherein the particle size of vanadium pentoxide is less than or equal to 120 meshes, and the particle size of metallic Al is less than or equal to 80 meshes.
4. The method for improving the apparent mass of the AlV55 alloy according to claim 1, wherein a coolant is added to the raw materials in step 1.
5. The method for improving the apparent mass of the AlV55 alloy according to claim 1, wherein in step 3, the water cooling and/or air cooling of the reactor is started 3-5 min after the reaction is completed, and the water cooling and/or air cooling is finished after the temperature of the reactor reaches 80-100 ℃.
6. The method for improving the apparent mass of the AlV55 alloy according to claim 1, wherein in step 3, the water cooling is performed through cooling water pipes spirally arranged on the periphery of the reactor, and the diameter ratio of the cooling water pipes to the reactor is 1: 20-1: 10, the flow rate of the cooling water is 0.5 to 1 m/s.
7. The method for improving the apparent mass of the AlV55 alloy according to claim 1, wherein in step 3, the air cooling is performed by one or more cooling fans disposed near the reactor.
8. The method for improving the apparent mass of the AlV55 alloy according to claim 1, wherein in step 4, the inert gas is introduced into the upper part of the molten pool of the reactor for purging immediately after the reaction is finished, and the inert gas introduction time is 5-8 h.
9. The method for improving the apparent mass of the AlV55 alloy according to claim 1, wherein in step 4, the inert gas flow is kept at 1-5 m3/h。
10. The method for improving the apparent mass of the AlV55 alloy according to claim 1, wherein step 3 and step 4 are performed simultaneously.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112080660A (en) * | 2020-09-28 | 2020-12-15 | 攀钢集团研究院有限公司 | Preparation method of low-impurity AlV55 alloy |
| CN115074561A (en) * | 2022-07-12 | 2022-09-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of AlV55 alloy |
| CN115109976A (en) * | 2022-07-12 | 2022-09-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for controlling AlV55 alloy oxide film at back end |
| RU2819965C1 (en) * | 2022-07-12 | 2024-05-28 | Паньган Груп Паньчжихуа Айрон & Стил Рисерч Инститьют Ко., Лтд. | Alv55 alloy cooling process control method |
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| CN108330369A (en) * | 2018-02-09 | 2018-07-27 | 攀钢集团攀枝花钢铁研究院有限公司 | A method of improving AlV55 alloy finished product rates |
| CN110819834A (en) * | 2019-11-20 | 2020-02-21 | 河钢股份有限公司承德分公司 | Preparation method of vanadium-aluminum alloy and reactor |
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| JPS6277432A (en) * | 1985-09-30 | 1987-04-09 | Nippon Kokan Kk <Nkk> | Manufacture of v-al alloy containing 60-90% v and 40-10% al |
| CN108330369A (en) * | 2018-02-09 | 2018-07-27 | 攀钢集团攀枝花钢铁研究院有限公司 | A method of improving AlV55 alloy finished product rates |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112080660A (en) * | 2020-09-28 | 2020-12-15 | 攀钢集团研究院有限公司 | Preparation method of low-impurity AlV55 alloy |
| CN115074561A (en) * | 2022-07-12 | 2022-09-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of AlV55 alloy |
| CN115109976A (en) * | 2022-07-12 | 2022-09-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for controlling AlV55 alloy oxide film at back end |
| WO2024012036A1 (en) * | 2022-07-12 | 2024-01-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for controlling alv55 alloy oxide film at back end |
| RU2819965C1 (en) * | 2022-07-12 | 2024-05-28 | Паньган Груп Паньчжихуа Айрон & Стил Рисерч Инститьют Ко., Лтд. | Alv55 alloy cooling process control method |
| CN115074561B (en) * | 2022-07-12 | 2024-05-31 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of AlV55 alloy |
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