CN108220646A - A kind of preparation method of Al-Ti-B alloy fining agent - Google Patents
A kind of preparation method of Al-Ti-B alloy fining agent Download PDFInfo
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- CN108220646A CN108220646A CN201711352399.XA CN201711352399A CN108220646A CN 108220646 A CN108220646 A CN 108220646A CN 201711352399 A CN201711352399 A CN 201711352399A CN 108220646 A CN108220646 A CN 108220646A
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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
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/003—Alloys based on aluminium containing at least 2.6% of one or more of the elements: tin, lead, antimony, bismuth, cadmium, and titanium
Abstract
The present invention relates to a kind of preparation method of Al-Ti-B alloy fining agent, the preparation method includes the following steps：(1) fine aluminium ingot is fused into molten aluminum and heated；(2) dispensing is added in into molten aluminum during molten aluminum heating in step (1), it is 1 that mass ratio is added in first into molten aluminum:1 potassium chloride and sodium fluoride then when temperature of aluminum liquid reaches 740 860 DEG C, potassium fluoborate and potassium fluotitanate is added in into molten aluminum, and the slag on alloy molten aluminum surface is scooped, and completes primary slagging-off；(3) Al-Ti-B alloy is added in into the alloy molten aluminum after primary slagging-off and refines special slag former progress slag making；(4) processing is de-gassed using rotary degassing machine argon or nitrogen, completes degassing and secondary slagging-off；(5) the alloy molten aluminum after slagging-off in step (4) is cast into mold, obtains Al-Ti-B alloy fining agent.The advantage of the invention is that：The present invention can improve the elongation percentage of Al-Ti-B alloy, and greatly improve Al-Ti-B alloy cleanliness factor.
Description
Technical field
The invention belongs to metallurgical smelting field, more particularly to a kind of preparation method of Al-Ti-B alloy fining agent.
Background technology
The evolution of Ti, B grain graining agent experienced three phases：Titanium-boron additive, Al-Ti-B intermediate alloy top, aluminium
Titanium boron wire, wherein titanium boron wire grain refiner are a kind of blocky additives, and Ti, B grain graining agent is with its outstanding thinning effect
It may compare favourably with import titanium boron wire, be much better than aluminium titanium intermediate alloy, for most of aluminium alloy, actually economic suitable crystalline substance
Grain fining agent.
Ti, B grain graining agent is made casting obtain tiny equiax crystal, is eliminated feather due to its excellent thinning effect
Brilliant and column crystal provides the institutional framework of good inherence for later processing, can improve casting efficiently against casting crack
Part appearance.
In the preparation method of Ti, B grain graining agent, it is divided into conventional ceramic technique, villiaumite method, pure titanium particle method etc., mesh by raw material
Before, most extensive and effective method is villiaumite method, i.e., produces aluminium titanium by thermit reaction using potassium fluotitanate and potassium fluoborate
Boron alloy, its thinning effect of the Al-Ti-B alloy of the method production is strong and sufficiently stable, the drawback is that due in alloying process
Corruption of the metallic compound impurity and fused salt that the by-product fluoaluminic acid sylvite of middle generation and reaction are brought into refractory material
Lose the field trash brought into, it is difficult to the effective thoroughly removal from Al-Ti-B alloy, cause these impurity brought into fining agent by
In the middle of the alloy of refinement, aluminium alloy thinning effect, while the presence of low melting point salt impurity are reduced.
In the patent of invention of 102031403 A of Patent No. CN, it is noted that a kind of refined high cleanliness Al-Ti-B alloy
Manufacturing method includes the following steps：1) aluminium ingot is melted and adds in potassium fluotitanate and potassium fluoborate alloying；2) it pours out and floats on aluminium
The byproduct of reaction on liquid surface, and neutralized with alumina powder；3) temperature of aluminum liquid is promoted, sprinkles aluminium oxide bisque；4) with the logical argon of pipe
Gas or nitrogen make the residue liquid emersion wrapped up in molten aluminum, and are neutralized；5) after rotating refinery by de-gassing technical finesse using minute bubbles
Measure its hydrogen content；6) under 800 DEG C or more of Warm status, special high-temp antioxidizing covering oxidant layer is sprinkled；7) molten aluminum will be promoted
Temperature, the filter box equipped with aluminium oxide ceramics filter is imported by molten aluminum, and on-line filtration processing is carried out to alloy molten aluminum；8) most
After reduce temperature of aluminum liquid, exclude scum silica frost, cast molding is produced into aluminium titanium boron wire.This method can efficiently separate out Al-Ti-B alloy
Fluoride salt and other field trashes in liquid so that impurity is reduced in Al-Ti-B alloy fining agent, cleanliness factor increases substantially；It is lacked
Point is that discharging volume is low, and being added after degasification due to special high-temp antioxidizing covering oxidant layer, and golden liquid is in previous step
In will be aoxidized or be sucked gas so that material occur stomata or it is loose the phenomenon that, reduce the elongation percentage of material.
For above-mentioned phenomenon, 104561619 B of patent CN disclose a kind of preparation side of aluminium titanium boron wire grain refiner
Method, the aluminium titanium boron wire grain refiner by the way of continuous casting and rolling, are as follows after the melting：(1) it melts：By fine aluminium
Ingot, which adds in, to be fused into molten aluminum in crucible furnace and heats；(2) alloying：Into step (1) during molten aluminum heating into molten aluminum
Dispensing is added in, potassium chloride, potassium fluoborate and potassium fluotitanate is followed successively by, alloy molten aluminum is obtained after heating stirring reaction completely；(3) it stirs
Mix degassing slagging-off：Alloy molten aluminum obtained in step (2) is transferred to stirring degassing in line frequency coreless electric holding furnace；(4) casting connects
It rolls：Molten aluminum after slagging-off in step (3) is transmitted in mold, is filtered successively through flow-conveying groove, crystallizing wheel cavity and tandem mill
Take-up obtains aluminium titanium boron wire after tandem rolling；The preparation method of the invention aluminium titanium boron wire grain refiner, avoids molten aluminum from being aoxidized or inhaled
Enter gas and occur stomata or it is loose the phenomenon that, improve the elongation percentage of aluminium titanium boron wire；Its shortcoming is what is generated in reaction process
A large amount of liquid slags have fabulous wetability with aluminium, to remove totally, extremely difficult.
Therefore, research and development are a kind of can improve the elongation percentage of Al-Ti-B alloy, and greatly improve Al-Ti-B alloy cleanliness factor
The preparation method of Al-Ti-B alloy fining agent is necessary.
Invention content
The elongation percentage of Al-Ti-B alloy can be improved, and greatly improve the technical problem to be solved in the present invention is to provide a kind of
The preparation method of the Al-Ti-B alloy fining agent of Al-Ti-B alloy cleanliness factor.
In order to solve the above technical problems, the technical scheme is that：A kind of preparation method of Al-Ti-B alloy fining agent,
Its innovative point is：The preparation method includes the following steps：
(1) it melts：99.95% fine aluminium ingot is added in and is fused into molten aluminum in crucible furnace and heats, heats 2-4 hours, makes
Temperature of aluminum liquid reaches 760-860 DEG C；
(2) alloying：Dispensing is added in into molten aluminum during molten aluminum heating in step (1), is added first into molten aluminum
It is 1 to enter mass ratio:1 potassium chloride and sodium fluoride makes it cover molten aluminum surface after melting；Then reach 740- in temperature of aluminum liquid
At 860 DEG C, potassium fluoborate is added in into molten aluminum, is uniformly mixed it, then potassium fluotitanate is added in molten aluminum, heating stirring is completely anti-
Should after obtain alloy molten aluminum, and the slag on alloy molten aluminum surface is scooped, complete primary slagging-off；
(3) slag making：Al-Ti-B alloy is added in into the alloy molten aluminum after primary slagging-off and refines special slag former, side edged with
680-720r/min speed stirs, it is made to be uniformly mixed with alloy molten aluminum；Wherein, the slag former is by the group of following parts by weight
It is grouped as：MgF216-20 parts, Na3AlF620-30 parts, CaF226-32 parts, Al2O310-20 parts and Na2SiF610-16 parts；
(4) rotation degassing slagging-off：Processing is de-gassed using rotary degassing machine argon or nitrogen, when hydrogen content reaches 0.2-
During 0.3ml/100gAl, processing is filtered with the aluminium oxide compound ceramic filter of 5/10ppi, removes the folder in alloy molten aluminum
Sundries completes degassing and secondary slagging-off；
(5) it casts：Mold is cleaned and swabbing before casting, mold is preheated, reaches mold temperature
160-260 DEG C, then the alloy molten aluminum after slagging-off in step (4) is cast into mold, obtains Al-Ti-B alloy fining agent.
Further, the weight ratio of the fine aluminium ingot, potassium fluoborate, potassium fluotitanate, potassium chloride and sodium fluoride is 41-
45:4-6:11-13:1-3:1-3。
Further, the addition of the slag former is the 0.1%-0.3% of alloy molten aluminum.
Further, the temperature of rotation degassing process is 900-950 DEG C in the step (4).
The advantage of the invention is that：The preparation method of Al-Ti-B alloy fining agent of the present invention, aluminium ingot fusing after, first to
Potassium chloride and sodium fluoride are added in molten aluminum, so as to molten aluminum is avoided aoxidize or to be sucked gas and occur stomata or it is loose the phenomenon that,
Improve the elongation percentage of Al-Ti-B alloy；Meanwhile increase slag making processing between primary slagging-off and secondary slagging-off, and slag making is handled
It is handled in the process by special slag former, the Al added in the special slag former2O3Both new impurity, absorption effect will not be introduced
Fruit is again good, is cooperateed with by it with the proportioning of other components, can be good at removing the fluoride in Al-Ti-B alloy, slag making effect
It is good, alloy impurity content is greatly reduced, improves alloy cleanliness and quality, meanwhile, also improve the thin of Al-Ti-B alloy
Change ability.
Specific embodiment
The following examples can make professional and technical personnel that the present invention be more fully understood, but therefore not send out this
It is bright to be limited among the embodiment described range.
Embodiment 1
The preparation method of the present embodiment Al-Ti-B alloy fining agent, the preparation method include the following steps：
(1) material：99.95% fine aluminium ingot 410kg, potassium fluoborate 40kg, potassium fluotitanate 110kg, potassium chloride 10kg with
And sodium fluoride 10kg；
(2) it melts：99.95% fine aluminium ingot is added in and is fused into molten aluminum in crucible furnace and heats, heats 2-4 hours, makes
Temperature of aluminum liquid reaches 760-860 DEG C；
(3) alloying：Dispensing is added in into molten aluminum during molten aluminum heating in step (2), is added first into molten aluminum
It is 1 to enter mass ratio:1 potassium chloride and sodium fluoride makes it cover molten aluminum surface after melting；Then reach 740- in temperature of aluminum liquid
At 860 DEG C, potassium fluoborate is added in into molten aluminum, is uniformly mixed it, then potassium fluotitanate is added in molten aluminum, heating stirring is completely anti-
Should after obtain alloy molten aluminum, and the slag on alloy molten aluminum surface is scooped, complete primary slagging-off；
(4) slag making：Added in into the alloy molten aluminum after primary slagging-off account for alloy molten aluminum 1% Al-Ti-B alloy refining it is special
Slag former, side edged are stirred with 680-720r/min speed, it is made to be uniformly mixed with alloy molten aluminum；Wherein, the slag former is
It is made of the component of following parts by weight：MgF216 parts, Na3AlF620 parts, CaF226 parts, Al2O310 parts and Na2SiF610 parts；
(5) rotation degassing slagging-off：Processing is de-gassed using rotary degassing machine argon or nitrogen, rotates the temperature of degassing process
It is 900-950 DEG C to spend, when hydrogen content reaches 0.2-0.3ml/100gAl, with the aluminium oxide compound ceramic filter of 5/10ppi
Processing is filtered, removes the field trash in alloy molten aluminum, completes degassing and secondary slagging-off；
(6) it casts：Mold is cleaned and swabbing before casting, mold is preheated, reaches mold temperature
160-260 DEG C, then the alloy molten aluminum after slagging-off in step (5) is cast into mold, obtains Al-Ti-B alloy fining agent.
The Al-Ti-B alloy fining agent pore-free that the present embodiment obtains, institutional framework is intensive, and material cleanliness factor is high, after testing often
There is the possibility 5.8% of 0.1 mm size more than field trash in square centimeter, and 0.2 millimeter or more of appearance every square centimeter is mingled with
The possibility 1.9% of object, the possibility every square centimeter for 0.5 millimeter of impurity occur is 0.8%；Ti contents reach 5%, B content
Reach 1%, product good in refining effect.
Embodiment 2
The preparation method of the present embodiment Al-Ti-B alloy fining agent, the preparation method include the following steps：
(1) material：99.95% fine aluminium ingot 450kg, potassium fluoborate 60kg, potassium fluotitanate 130kg, potassium chloride 30kg with
And sodium fluoride 30kg；
(2) it melts：99.95% fine aluminium ingot is added in and is fused into molten aluminum in crucible furnace and heats, heats 2-4 hours, makes
Temperature of aluminum liquid reaches 760-860 DEG C；
(3) alloying：Dispensing is added in into molten aluminum during molten aluminum heating in step (2), is added first into molten aluminum
It is 1 to enter mass ratio:1 potassium chloride and sodium fluoride makes it cover molten aluminum surface after melting；Then reach 740- in temperature of aluminum liquid
At 860 DEG C, potassium fluoborate is added in into molten aluminum, is uniformly mixed it, then potassium fluotitanate is added in molten aluminum, heating stirring is completely anti-
Should after obtain alloy molten aluminum, and the slag on alloy molten aluminum surface is scooped, complete primary slagging-off；
(4) slag making：Added in into the alloy molten aluminum after primary slagging-off account for alloy molten aluminum 3% Al-Ti-B alloy refining it is special
Slag former, side edged are stirred with 680-720r/min speed, it is made to be uniformly mixed with alloy molten aluminum；Wherein, the slag former is
It is made of the component of following parts by weight：MgF220 parts, Na3AlF630 parts, CaF232 parts, Al2O320 parts and Na2SiF616 parts；
(5) rotation degassing slagging-off：Processing is de-gassed using rotary degassing machine argon or nitrogen, rotates the temperature of degassing process
It is 900-950 DEG C to spend, when hydrogen content reaches 0.2-0.3ml/100gAl, with the aluminium oxide compound ceramic filter of 5/10ppi
Processing is filtered, removes the field trash in alloy molten aluminum, completes degassing and secondary slagging-off；
(6) it casts：Mold is cleaned and swabbing before casting, mold is preheated, reaches mold temperature
160-260 DEG C, then the alloy molten aluminum after slagging-off in step (5) is cast into mold, obtains Al-Ti-B alloy fining agent.
The Al-Ti-B alloy fining agent pore-free that the present embodiment obtains, institutional framework is intensive, and material cleanliness factor is high, after testing often
There is the possibility 6.1% of 0.1 mm size more than field trash in square centimeter, and 0.2 millimeter or more of appearance every square centimeter is mingled with
The possibility 1.8% of object, the possibility every square centimeter for 0.5 millimeter of impurity occur is 0.9%；Ti contents reach 6%, B content
Reach 2%, product good in refining effect.
Embodiment 3
The preparation method of the present embodiment Al-Ti-B alloy fining agent, the preparation method include the following steps：
(1) material：99.95% fine aluminium ingot 430kg, potassium fluoborate 50kg, potassium fluotitanate 120kg, potassium chloride 20kg with
And sodium fluoride 20kg；
(2) it melts：99.95% fine aluminium ingot is added in and is fused into molten aluminum in crucible furnace and heats, heats 2-4 hours, makes
Temperature of aluminum liquid reaches 760-860 DEG C；
(3) alloying：Dispensing is added in into molten aluminum during molten aluminum heating in step (2), is added first into molten aluminum
It is 1 to enter mass ratio:1 potassium chloride and sodium fluoride makes it cover molten aluminum surface after melting；Then reach 740- in temperature of aluminum liquid
At 860 DEG C, potassium fluoborate is added in into molten aluminum, is uniformly mixed it, then potassium fluotitanate is added in molten aluminum, heating stirring is completely anti-
Should after obtain alloy molten aluminum, and the slag on alloy molten aluminum surface is scooped, complete primary slagging-off；
(4) slag making：Added in into the alloy molten aluminum after primary slagging-off account for alloy molten aluminum 2% Al-Ti-B alloy refining it is special
Slag former, side edged are stirred with 680-720r/min speed, it is made to be uniformly mixed with alloy molten aluminum；Wherein, the slag former is
It is made of the component of following parts by weight：MgF218 parts, Na3AlF625 parts, CaF229 parts, Al2O315 parts and Na2SiF613 parts；
(5) rotation degassing slagging-off：Processing is de-gassed using rotary degassing machine argon or nitrogen, rotates the temperature of degassing process
It is 900-950 DEG C to spend, when hydrogen content reaches 0.2-0.3ml/100gAl, with the aluminium oxide compound ceramic filter of 5/10ppi
Processing is filtered, removes the field trash in alloy molten aluminum, completes degassing and secondary slagging-off；
(6) it casts：Mold is cleaned and swabbing before casting, mold is preheated, reaches mold temperature
160-260 DEG C, then the alloy molten aluminum after slagging-off in step (5) is cast into mold, obtains Al-Ti-B alloy fining agent.
The Al-Ti-B alloy fining agent pore-free that the present embodiment obtains, institutional framework is intensive, and material cleanliness factor is high, after testing often
There is the possibility 4.9% of 0.1 mm size more than field trash in square centimeter, and 0.2 millimeter or more of appearance every square centimeter is mingled with
The possibility 1.6% of object, the possibility every square centimeter for 0.5 millimeter of impurity occur is 0.6%；Ti contents reach 8%, B content
Reach 2%, product good in refining effect.
Basic principle of the invention and main feature and advantages of the present invention has been shown and described above.The skill of the industry
Art personnel it should be appreciated that the present invention is not limited to the above embodiments, the above embodiments and description only describe
The principle of the present invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these
Changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and
Its equivalent thereof.
Claims (4)
1. a kind of preparation method of Al-Ti-B alloy fining agent, it is characterised in that：The preparation method includes the following steps：
(1) it melts：99.95% fine aluminium ingot is added in and is fused into molten aluminum in crucible furnace and heats, heats 2-4 hours, makes molten aluminum
Temperature reaches 760-860 DEG C；
(2) alloying：Dispensing is added in into molten aluminum during molten aluminum heating in step (1), adds in matter into molten aluminum first
Amount is than being 1:1 potassium chloride and sodium fluoride makes it cover molten aluminum surface after melting；Then reach 740-860 DEG C in temperature of aluminum liquid
When, potassium fluoborate is added in into molten aluminum, is uniformly mixed it, then potassium fluotitanate is added in molten aluminum, after heating stirring reaction completely
Alloy molten aluminum is obtained, and the slag on alloy molten aluminum surface is scooped, completes primary slagging-off；
(3) slag making：Al-Ti-B alloy is added in into the alloy molten aluminum after primary slagging-off and refines special slag former, and side edged is with 680-
720r/min speed stirs, it is made to be uniformly mixed with alloy molten aluminum；Wherein, the slag former is the component group by following parts by weight
Into：MgF216-20 parts, Na3AlF620-30 parts, CaF226-32 parts, Al2O310-20 parts and Na2SiF610-16 parts；
(4) rotation degassing slagging-off：Processing is de-gassed using rotary degassing machine argon or nitrogen, when hydrogen content reaches 0.2-
During 0.3ml/100gAl, processing is filtered with the aluminium oxide compound ceramic filter of 5/10ppi, removes the folder in alloy molten aluminum
Sundries completes degassing and secondary slagging-off；
(5) it casts：Mold is cleaned and swabbing before casting, mold is preheated, mold temperature is made to reach 160-260
DEG C, then the alloy molten aluminum after slagging-off in step (4) is cast into mold, obtains Al-Ti-B alloy fining agent.
2. the preparation method of Al-Ti-B alloy fining agent according to claim 1, it is characterised in that：The fine aluminium ingot, fluorine
Potassium borate, potassium fluotitanate, potassium chloride and sodium fluoride weight ratio be 41-45:4-6:11-13:1-3:1-3.
3. the preparation method of Al-Ti-B alloy fining agent according to claim 1, it is characterised in that：The slag former adds
Enter the 0.1%-0.3% that amount is alloy molten aluminum.
4. the preparation method of Al-Ti-B alloy fining agent according to claim 1, it is characterised in that：In the step (4)
The temperature for rotating degassing process is 900-950 DEG C.
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| CN201711352399.XA CN108220646A (en) | 2017-12-15 | 2017-12-15 | A kind of preparation method of Al-Ti-B alloy fining agent |
| PCT/CN2017/118599 WO2019114032A1 (en) | 2017-12-15 | 2017-12-26 | Preparation method for aluminum-titanium-boron alloy refiner |
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| CN201711352399.XA CN108220646A (en) | 2017-12-15 | 2017-12-15 | A kind of preparation method of Al-Ti-B alloy fining agent |
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Cited By (2)
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| CN111349822A (en) * | 2020-03-20 | 2020-06-30 | 永城金联星铝合金有限公司 | Aluminum-titanium-boron-strontium-rare earth alloy wire and preparation method thereof |
| CN111349822B (en) * | 2020-03-20 | 2021-08-13 | 永城金联星铝合金有限公司 | Aluminum-titanium-boron-strontium-rare earth alloy wire and preparation method thereof |
| CN113846242A (en) * | 2021-09-07 | 2021-12-28 | 哈尔滨理工大学 | Composite refining/modifying agent for aluminum alloy and application thereof |
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