CN112746191A - Preparation method of mixed Sc-Zr aluminum alloy - Google Patents
Preparation method of mixed Sc-Zr aluminum alloy Download PDFInfo
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- CN112746191A CN112746191A CN202011624341.8A CN202011624341A CN112746191A CN 112746191 A CN112746191 A CN 112746191A CN 202011624341 A CN202011624341 A CN 202011624341A CN 112746191 A CN112746191 A CN 112746191A
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- aluminum
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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
Abstract
The invention discloses a preparation method of a mixed Sc-Zr aluminum alloy, which comprises the following steps: melting and overheating an aluminum ingot to a high-temperature melt, and proportionally mixing the dried potassium fluozirconate K2ZrF6Adding the cryolite mixture into the high-temperature melt, and stirring until blue flame appears to prepare the aluminum-zirconium alloy; and adding a set amount of chloride, enabling the high-temperature melt to become molten salt aluminum, wrapping scandium oxide with pure aluminum foil or pressing aluminum powder and scandium oxide powder into blocks, adding the blocks into the high-temperature melt, carrying out sectional heating, keeping the temperature for a set time after reacting for a period of time to fully dissolve scandium, uniformly stirring, removing impurities, and casting the blocks into a preheated mold to form Al-Sc-Zr ingots. The Al-Sc alloy can refine alloy grains, inhibit recrystallization, improve the strength and corrosion resistance of the alloy and reduce or even eliminate heat cracks at welding seams. Adding into Al-Sc alloyZr can reduce the addition of scandium (the price of scandium is much more expensive than that of zirconium), reduce the cost of raw materials (can reduce 20-30%), and improve the performance of the alloy.
Description
Technical Field
The invention relates to a preparation method of a mixed Sc-Zr aluminum alloy, belonging to the technical field of alloy manufacturing.
Background
In the existing high-conductivity aluminum alloy melt purification process, the smelting degassing time is long, hydrogen is easily brought in during smelting, the conductivity is affected, a graphite rotor is adopted to rotate and spray refining agent powder and argon, the spraying effect is poor, and the mode has uneven adding.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a preparation method of a mixed Sc-Zr aluminum alloy, which aims to solve the technical problems in the prior art.
The technical scheme adopted by the invention is as follows: a preparation method of a mixed Sc-Zr aluminum alloy comprises the following steps: melting and overheating an aluminum ingot to a high-temperature melt, and proportionally mixing the dried potassium fluozirconate K2ZrF6Adding the cryolite mixture into the high-temperature melt, and stirring until blue flame appears to prepare the aluminum-zirconium alloy; and adding a set amount of chloride, enabling the high-temperature melt to become molten salt aluminum, wrapping scandium oxide with pure aluminum foil or pressing aluminum powder and scandium oxide powder into blocks, adding the blocks into the high-temperature melt, carrying out sectional heating, keeping the temperature for a set time after reacting for a period of time to fully dissolve scandium, uniformly stirring, removing impurities, and casting the blocks into a preheated mold to form Al-Sc-Zr ingots.
Preferably, the thickness of the Al-Sc-Zr ingot in the die is not more than 25 mm.
Preferably, the aluminum ingot is melted and the covering agent is added.
Preferably, the high-temperature melt temperature is 700-.
Preferably, the temperature raising method in stages comprises: heating up to the set temperature once every 50 ℃, and preserving heat for 3-5min after each heating up.
Preferably, the edulcoration equipment that above-mentioned edulcoration adopted includes rotatory nozzle, high temperature resistant fall way, tombarthite powder case, air pump and inert gas bottle, and rotatory nozzle installs at high temperature resistant fall way lower extreme, and high temperature resistant fall way is installed on elevating gear and the upper end is connected to venturi through admission line, and the tombarthite powder case is connected to venturi's vertical feed end, and the horizontal inlet end passes through pipe connection to the air pump, and the air pump passes through pipe connection to inert gas bottle.
Preferably, the lifting device comprises a chuck, an electric push rod and a fixing frame, the chuck is fixedly connected to the outer end of a push-pull rod of the electric push rod, a machine body of the electric push rod is fixedly connected to the fixing frame, a sleeve hole fixedly connected with the high-temperature resistant lifting pipe is formed in the chuck, and the high-temperature resistant lifting pipe penetrates into the sleeve hole and then is locked by a locking screw.
Preferably, the rotary head is provided with a plurality of nozzles.
Preferably, a cooling box is arranged outside the machine body, the four side box walls and the bottom side wall of the cooling box are cavities, a snake-shaped water channel is arranged in each cavity, a water inlet and a water outlet are arranged at two ends of each snake-shaped water channel, the water inlets are connected to a water pump through pipelines, the water pump is connected to a cooling water tank through pipelines, and the water outlets are connected to the cooling water tank.
Preferably, the serpentine water channels in the five cavities are connected in series through a pipeline.
Preferably, the above-mentioned admission line divide into two sections, one end fixed connection of one section of admission line is on high temperature resistant fall way, and the other end is connected to the automatic wind-up unit that accomodates of pipeline after walking around the fixed pulley on, and the automatic pivot of accomodating the wind-up unit of pipeline is the hollow shaft, and hollow shaft one end is connected to this section of admission line, and the other end is connected to other end admission line through rotary joint, and fixed pulley and the automatic wind-up unit fixed connection of accomodating of pipeline just ensure that the fixed pulley winding back keeps vertical being connected to on high temperature resistant fall.
Preferably, the automatic pipe storage and winding device is configured to drive a drum to wind the pipe in a rotating manner by using a motor.
The invention has the beneficial effects that: compared with the prior art, the invention has the following effects:
(1) firstly, preparing an aluminum-zirconium alloy to change a melt into a molten salt system, then reducing scandium oxide by using Al in the molten salt system to prepare an aluminum-scandium alloy, and mixing to obtain an Al-Sc-Zr alloy; the Al-Sc alloy can refine alloy grains, inhibit recrystallization, improve the strength and corrosion resistance of the alloy and reduce or even eliminate heat cracks at welding seams. Zr is added into the Al-Sc alloy, so that the addition amount of scandium (the price of scandium is much more expensive than that of zirconium) can be reduced, the cost of raw materials can be reduced (20% -30%), and the performance of the alloy is also improved;
(2) adopt the injection mode to spout the aluminium alloy melt with the tombarthite powder of degasification edulcoration, make and mix more evenly with the aluminium alloy melt, form the vortex to the aluminium alloy melt among the injection process, under the effect of electromagnetic stirring, the composition is also more even in the aluminium alloy melt, the high strength aluminum alloy tissue performance of obtaining is better, adopt inert gas to spout the tombarthite powder for the carrier, inert gas plays the carrier effect on the one hand, form the power of injection state in blowout department, on the other hand, play the effect of degasification edulcoration, under the injection effect, the degasification edulcoration is more thorough.
Drawings
FIG. 1 is a schematic view of a structure of a trash removal apparatus.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
Example 1: as shown in fig. 1, a method for preparing a mixed Sc-Zr aluminum alloy comprises: melting and overheating an aluminum ingot to a high-temperature melt, and proportionally mixing the dried potassium fluozirconate K2ZrF6Adding the cryolite mixture into the high-temperature melt, and stirring until blue flame appears to prepare the aluminum-zirconium alloy; and adding a set amount of chloride, enabling the high-temperature melt to become molten salt aluminum, wrapping scandium oxide with pure aluminum foil or pressing aluminum powder and scandium oxide powder into blocks, adding the blocks into the high-temperature melt, carrying out sectional heating, keeping the temperature for a set time after reacting for a period of time to fully dissolve scandium, uniformly stirring, removing impurities, and casting the blocks into a preheated mold to form Al-Sc-Zr ingots.
Preferably, the thickness of the Al-Sc-Zr ingot in the die is not more than 25 mm.
Preferably, the aluminum ingot is melted and the covering agent is added.
Preferably, the high-temperature melt temperature is 700-.
Preferably, the temperature raising method in stages comprises: the temperature is raised to the set temperature once every 50 ℃, and the temperature is kept for 3-5min after each temperature rise, so that the temperature balance can be ensured, and the tissue performance is better.
Firstly, preparing an aluminum-zirconium alloy to change a melt into a molten salt system, then reducing scandium oxide by using Al in the molten salt system to prepare an aluminum-scandium alloy, and mixing to obtain an Al-Sc-Zr alloy; the Al-Sc alloy can refine alloy grains, inhibit recrystallization, improve the strength and corrosion resistance of the alloy and reduce or even eliminate heat cracks at welding seams. Zr is added into the Al-Sc alloy, so that the addition amount of scandium (the price of scandium is much more expensive than that of zirconium) can be reduced, the cost of raw materials can be reduced (20% -30%), and the performance of the alloy is also improved.
Preferably, the impurity removing equipment adopted by the impurity removing comprises a rotary spray head 1, a high-temperature resistant lifting pipe 2, a rare earth powder box 3, an air pump 4 and an inert gas bottle 5, wherein the rotary spray head 1 is arranged at the lower end of the high-temperature resistant lifting pipe 2, the high-temperature resistant lifting pipe 2 is arranged on a lifting device 6, the upper end of the high-temperature resistant lifting pipe is connected to a Venturi tube 7 through an air inlet pipeline 16, the vertical feeding end of the Venturi tube 7 is connected with the rare earth powder box 3, the horizontal air inlet end of the Venturi tube is connected to the air pump 4 through a pipeline, the air pump 4 is connected to the inert gas bottle 5 through a pipeline, the rotary spray head 1 is a high-temperature resistant mechanical rotary spray head, automatic rotation is realized under the power action of air pressure (similar to the mechanical rotary spray head), rare earth powder is sprayed out, the principle of the Venturi tube is adopted, the rare earth powder is uniformly brought into an, so that the rare earth powder is mixed more uniformly in the aluminum alloy melt.
Preferably, the lifting device 6 comprises a chuck 8, an electric push rod 9 and a fixing frame 10, the chuck 8 is fixedly connected to the outer end of a push-pull rod 11 of the electric push rod 9, a machine body 12 of the electric push rod 9 is fixedly connected to the fixing frame 10, a sleeve hole 13 fixedly connected with a high-temperature resistant lifting pipe 2 is formed in the chuck 8, the high-temperature resistant lifting pipe 2 penetrates through the sleeve hole 13 and then is locked by a locking screw 14, the electric push rod is lifted, the lifting is accurate and stable, the fixing frame is of a vertical Z-shaped structure, and a through hole through which the push-pull rod 11 extends is formed in the cantilever.
Preferably, the rotary head 1 is provided with a plurality of nozzles, and the uniformity of ejection can be further improved.
Preferably, be provided with cooler bin 15 outside above-mentioned organism 12, four side tank walls and the bottom wall of cooler bin 15 are the cavity, set up snakelike water course in the cavity, snakelike water course both ends set up water inlet and delivery port, the water inlet passes through pipe connection to the water pump, the water pump passes through pipe connection to coolant tank, the delivery port is connected to coolant tank, install the cooler bin additional, can avoid the interior high temperature of electromagnetic stirring incasement to influence the life-span of electric putter internal component, snakelike water course, the cooling effect is better, 15 fixed connection of cooler bin is on mount 10, the bottom wall board is provided with the through-hole of wearing out that push-and-pull rod 11 stretches out, it is provided with high temperature resistant sealing washer to wear out between.
Preferably, the snake-shaped water channels in the five cavities are connected in series through pipelines, and the pipeline arrangement is reduced due to the serial connection structure, so that the structure is more compact, and the installation is convenient.
Preferably, the above-mentioned admission line 16 divide into two sections, 16 one end fixed connection of one section of admission line is on high temperature resistant elevator pipe 2, the other end is connected to the automatic wind-up device 18 that accomodates of pipeline after walking around fixed pulley 17 on, the automatic pivot of accomodating wind-up device 18 of pipeline is the hollow shaft, hollow shaft one end is connected to this section of admission line 16, the other end is connected to other end admission line 16 through rotary joint, fixed pulley 17 and the automatic wind-up device 18 fixed connection of accomodating of pipeline are at 15 tops of cooler bin and ensure that fixed pulley 17 twines to keep vertical being connected to high temperature resistant elevator pipe 2 to the hypomere, adopt the automatic wind-up device of accomodating of pipeline, avoid the admission line to fall into high temperature melt and burn out, the metal protective.
Preferably, the automatic pipe storage and winding device 18 is driven by a motor to rotate and wind by a roller, and the extension length of the air inlet pipe is equal to the extension length of the electric push rod when the motor rotates.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and therefore, the scope of the present invention should be determined by the scope of the claims.
Claims (10)
1. A preparation method of a mixed Sc-Zr aluminum alloy is characterized by comprising the following steps: the method comprises the following steps: melting and overheating an aluminum ingot to a high-temperature melt, and proportionally mixing the dried potassium fluozirconate K2ZrF6Adding the cryolite mixture into the high-temperature melt, and stirring until blue flame appears to prepare the aluminum-zirconium alloy; and adding a set amount of chloride, enabling the high-temperature melt to become molten salt aluminum, wrapping scandium oxide with pure aluminum foil or pressing aluminum powder and scandium oxide powder into blocks, adding the blocks into the high-temperature melt, carrying out sectional heating, keeping the temperature for a set time after reacting for a period of time to fully dissolve scandium, uniformly stirring, removing impurities, and casting the blocks into a preheated mold to form Al-Sc-Zr ingots.
2. The method of claim 1, wherein the method comprises: the thickness of the Al-Sc-Zr ingot in the die is not more than 25 mm.
3. The method of claim 1, wherein the method comprises: melting the aluminum ingot and adding a covering agent.
4. The method of claim 1, wherein the method comprises: the high-temperature melt temperature is 700-800 ℃.
5. The method of claim 1, wherein the method comprises: the sectional heating method comprises the following steps: heating up to the set temperature once every 50 ℃, and preserving heat for 3-5min after each heating up.
6. The method of claim 1, wherein the method comprises: impurity removing equipment that edulcoration adopted includes rotatory nozzle (1), high temperature resistant fall way (2), tombarthite powder case (3), air pump (4) and inert gas bottle (5), install at high temperature resistant fall way (2) lower extreme rotatory nozzle (1), high temperature resistant fall way (2) are installed on elevating gear (6) and the upper end is connected to venturi (7) through admission line (16), tombarthite powder case (3) are connected to the perpendicular feed end of venturi (7), horizontal admission end is through pipe connection to air pump (4), air pump (4) are through pipe connection to inert gas bottle (5).
7. The method of claim 6, wherein the Sc-Zr aluminum alloy is selected from the group consisting of: the lifting device (6) comprises a chuck (8), an electric push rod (9) and a fixing frame (10), the chuck (8) is fixedly connected to the outer end of a push-pull rod (11) of the electric push rod (9), a machine body (12) of the electric push rod (9) is fixedly connected to the fixing frame (10), a sleeve hole (13) fixedly connected with the high-temperature resistant lifting pipe (2) is formed in the chuck (8), and the high-temperature resistant lifting pipe (2) is locked by a locking screw (14) after penetrating into the sleeve hole (13).
8. The method of claim 6, wherein the Sc-Zr aluminum alloy is selected from the group consisting of: the rotary nozzle (1) is provided with a plurality of nozzles.
9. The method of claim 7, wherein the Sc-Zr aluminum alloy is selected from the group consisting of: a cooling box (15) is arranged outside the machine body (12), the four side box walls and the bottom side wall of the cooling box (15) are cavities, a snakelike water channel is arranged in the cavity, a water inlet and a water outlet are arranged at two ends of the snakelike water channel, the water inlet is connected to a water pump through a pipeline, the water pump is connected to the cooling water tank through a pipeline, and the water outlet is connected to the cooling water tank; the snake-shaped water channels in the five cavities are connected in series through pipelines.
10. The method of claim 9, wherein the method comprises: intake duct (16) divide into two sections, one of them section intake duct (16) one end fixed connection is on high temperature resistant fall way (2), the other end is connected to on automatic wind device (18) of accomodating of pipeline is accomodate to the pipeline after walking around fixed pulley (17), the automatic pivot of accomodating wind device (18) of pipeline is the hollow shaft, hollow shaft one end is connected to this section intake duct (16), the other end is connected to other end intake duct (16) through rotary joint, fixed pulley (17) and automatic wind device (18) fixed connection of accomodating of pipeline (17) just ensure that fixed pulley (17) twine the back down section and keep vertical being connected to on high temperature resistant fall way (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011624341.8A CN112746191A (en) | 2020-12-30 | 2020-12-30 | Preparation method of mixed Sc-Zr aluminum alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115896551A (en) * | 2022-11-17 | 2023-04-04 | 山东省科学院新材料研究所 | Aluminum-scandium-zirconium intermediate alloy and preparation method thereof |
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