CN107398548B - A kind of grain refiner of significant Refining Mg Alloy tissue and its preparation and application method - Google Patents
A kind of grain refiner of significant Refining Mg Alloy tissue and its preparation and application method Download PDFInfo
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- CN107398548B CN107398548B CN201710627426.3A CN201710627426A CN107398548B CN 107398548 B CN107398548 B CN 107398548B CN 201710627426 A CN201710627426 A CN 201710627426A CN 107398548 B CN107398548 B CN 107398548B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/20—Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/02—Casting exceedingly oxidisable non-ferrous metals, e.g. in inert atmosphere
- B22D21/04—Casting aluminium or magnesium
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Abstract
The invention discloses a kind of grain refiner of significant Refining Mg Alloy tissue and its preparation and application methods, it is by paraffin, graphite and fluorite 60:35:5 in mass ratio mixing are mixed thoroughly, it is placed on heating in flat crucible, paraffin is cooling after all melting, it is spare to be then cut into small cube, it utilizes the method for the grain refiner cast magnesium alloy of significant Refining Mg Alloy tissue: carrying out alloying refining when magnesium alloy is melted to 740 DEG C, refining process is that magnesium alloy is added, zinc ingot metal carries out mechanical stirring again, slagging-off, a pipetting processes are carried out again, after equal aluminium alloys move on to another kier, it is being warming up to 740 DEG C, proportioned grain refiner is packed into iron cage and is slowly added into the middle part of magnesium alloy solution, then it is stirred, argon gas is poured in mechanical agitation process 5 minutes, process is exhausted, reprecipitation is stood It is poured within 30 minutes, can achieve 100 μm of crystal grain of fineness of grain quality index after product casting, increase intensity and toughness.
Description
Technical field
The invention belongs to technical field of metal material preparation, and in particular to a kind of crystal grain of significant Refining Mg Alloy tissue is thin
Agent and its preparation and application method.
Background technique
Magnesium alloy possesses good overall characteristic, is widely used in automobile, electricity as structural metallic material most light at present
Son, aviation field.Magnesium alloy grains have important in terms of improving magnesium alloy mechanical property and promoting magnesium alloy
Effect and status.
Common magnesium alloy series usually production refining grain size is that 1000um needs to improve with the requirement in market
Alloy strength.It is 100um or less that user, which requires refining grain size,.Ordinary magnesium alloy is extremely difficult to require, such to reach
Index all takes the big blank of ready-made magnesium alloy diameter 300mm to try again 420 DEG C at present and heats and squeeze compression blank technique
After can be only achieved fineness of grain 100um index, in this way increase by one procedure cause 1000 yuan of ton increased costs.Lose the market price
Competitiveness is gone.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of grain refiner of significant Refining Mg Alloy tissue
And its preparation and application method, using the fining agent casting magnesium alloy crystallite dimension be 100 μm hereinafter, increase alloy strength and
Toughness.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of grain refiner of significant Refining Mg Alloy tissue, it is by paraffin, graphite and fluorite in mass ratio 60:
35:5 is mixed.
The preparation method of the grain refiner of the significant Refining Mg Alloy tissue, steps are as follows: by weight ratio will
Three kinds of paraffin, graphite and fluorite raw material mixing are mixed thoroughly, and heating in flat crucible is placed on, cooling after waiting paraffin all to melt, then
It is spare to be cut into 40mm × 40mm × 40mm small cube.
The method of the grain refiner cast magnesium alloy of the significant Refining Mg Alloy tissue, steps are as follows:
(1) under the conditions of gas shield, the pure magnesium ingot prepared in proportion is first preheated to 380-400 DEG C in crucible furnace,
It then heats to 670-690 DEG C of progress sufficiently fusing and obtains Serum Magnesium；
(2) fine aluminium prepared by AZ80 component ratio and pure zinc are added in Serum Magnesium, continue to keep the temperature extremely at 670-690 DEG C
It is completely melt, then heats to 730-740 DEG C and be sufficiently stirred, keep ingredient uniform；
(3) calcirm-fluoride is added and No. 2 solvents is refined, refining temperature is set as 730-750 DEG C, stands 5-10 points of heat preservation
Clock；
(4) aluminium alloy stood is moved into another crucible and is warming up to 740-750 DEG C；
(5) proportioned grain refiner is packed into iron cage and is placed in the middle part of magnesium alloy solution, is then stirred, in machine
Argon gas is poured in tool whipping process 5 minutes, process is exhausted；
(6) precipitating is poured after standing 30 minutes under conditions of 690-700 DEG C, can achieve crystal grain after product casting
100 μm of fineness of grain quality index.
The dosage of No. 2 solvents is the 2% of pure magnesium ingot quality in the step (3), and the dosage of the anhydrous calcirm-fluoride is No. 2
The 10% of solvent quality.
The dosage of grain refiner is the 8% of pure magnesium ingot quality in the step (5).
Beneficial effects of the present invention: paraffin, graphite and fluorite are added under melting state, play the role of dropping impurity, molten
Under molten state the significantly more efficient refinement of alloying pellet can be fitted close, to reach alloy refinement effect；Secondly, of the invention
Paraffin, graphite and fluorite 60:35:5 in mass ratio are placed in flat crucible in advance and heated, it is cooling after waiting paraffin all to melt,
It is spare to be then cut into 40mm × 40mm × 40mm small cube, paraffin is all melted and enables graphite and fluorite after thawing
Paraffin in be uniformly distributed, and using when be packed into iron cage and be placed in the middle part of magnesium alloy solution, further such that fining agent can be equal
It is even to act on entire magnesium alloy solution, to significantly improve the refinement degree of finished product magnesium alloy, improve intensity and toughness.
Specific embodiment
Combined with specific embodiments below, the present invention will be further described.It should be understood that following embodiment is merely to illustrate this
The person skilled in the art of the range of invention and is not intended to limit the present invention, the field can make one according to the content of foregoing invention
A little nonessential modifications and adaptations.
Embodiment 1
The grain refiner of the significant Refining Mg Alloy tissue of the present embodiment, it is by paraffin, graphite and fluorite by quality
It is mixed than 60:35:5.
The preparation method of the grain refiner of the significant Refining Mg Alloy tissue of the present embodiment, steps are as follows: matching by weight
Than three kinds of paraffin, graphite and fluorite raw materials are mixed and mixed thoroughly, it is placed on heating in flat crucible, it is cooling after waiting paraffin all to melt,
It is spare to be then cut into 40mm × 40mm × 40mm small cube.
The method of the grain refiner cast magnesium alloy of the significant Refining Mg Alloy tissue of the present embodiment, steps are as follows:
(1) under the conditions of gas shield, the pure magnesium ingot prepared in proportion is first preheated to 380 DEG C in crucible furnace, then
It is warming up to 670 DEG C of progress sufficiently fusing and obtains Serum Magnesium；
(2) fine aluminium prepared by AZ80 component ratio and pure zinc are added in Serum Magnesium, continue to keep the temperature at 670 DEG C to complete
Fusing, then heats to 730 DEG C and is sufficiently stirred, keep ingredient uniform；
(3) calcirm-fluoride is added and No. 2 solvents is refined, refining temperature is set as 750 DEG C, stands heat preservation 5-10 minutes；No. 2
The dosage of solvent is the 2% of pure magnesium ingot quality, and the dosage of the anhydrous calcirm-fluoride is the 10% of No. 2 solvent qualities；
(4) aluminium alloy stood is moved into another crucible and is warming up to 750 DEG C；
(5) proportioned grain refiner is fitted into iron cage in the ratio of pure magnesium ingot quality 8% and is placed in magnesium alloy solution
Then portion is stirred, argon gas is poured in mechanical agitation process 5 minutes, process is exhausted；
(6) precipitating is poured after standing 30 minutes under conditions of 690 DEG C, can achieve 100 μ of crystal grain after product casting
The fineness of grain quality index of m.
Embodiment 2
The grain refiner of the significant Refining Mg Alloy tissue of the present embodiment, it is by paraffin, graphite and fluorite by quality
It is mixed than 60:35:5.
The preparation method of the grain refiner of the significant Refining Mg Alloy tissue of the present embodiment, steps are as follows: matching by weight
Than three kinds of paraffin, graphite and fluorite raw materials are mixed and mixed thoroughly, it is placed on heating in flat crucible, it is cooling after waiting paraffin all to melt,
It is spare to be then cut into 40mm × 40mm × 40mm small cube.
The method of the grain refiner cast magnesium alloy of the significant Refining Mg Alloy tissue of the present embodiment, steps are as follows:
(1) under the conditions of gas shield, the pure magnesium ingot prepared in proportion is first preheated to 400 DEG C in crucible furnace, then
It is warming up to 690 DEG C of progress sufficiently fusing and obtains Serum Magnesium；
(2) fine aluminium prepared by AZ80 component ratio and pure zinc are added in Serum Magnesium, continue to keep the temperature at 690 DEG C to complete
Fusing, then heats to 740 DEG C and is sufficiently stirred, keep ingredient uniform；
(3) calcirm-fluoride is added and No. 2 solvents is refined, refining temperature is set as 740 DEG C, stands heat preservation 5-10 minutes；No. 2
The dosage of solvent is the 2% of pure magnesium ingot quality, and the dosage of the anhydrous calcirm-fluoride is the 10% of No. 2 solvent qualities；
(4) aluminium alloy stood is moved into another crucible and is warming up to 740 DEG C；
(5) proportioned grain refiner is fitted into iron cage in the ratio of pure magnesium ingot quality 8% and is placed in magnesium alloy solution
Then portion is stirred, argon gas is poured in mechanical agitation process 5 minutes, process is exhausted；
(6) precipitating is poured after standing 30 minutes under conditions of 700 DEG C, can achieve 100 μ of crystal grain after product casting
The fineness of grain quality index of m.
Embodiment 3
The grain refiner of the significant Refining Mg Alloy tissue of the present embodiment, it is by paraffin, graphite and fluorite by quality
It is mixed than 60:35:5.
The preparation method of the grain refiner of the significant Refining Mg Alloy tissue of the present embodiment, steps are as follows: matching by weight
Than three kinds of paraffin, graphite and fluorite raw materials are mixed and mixed thoroughly, it is placed on heating in flat crucible, it is cooling after waiting paraffin all to melt,
It is spare to be then cut into 40mm × 40mm × 40mm small cube.
The method of the grain refiner cast magnesium alloy of the significant Refining Mg Alloy tissue of the present embodiment, steps are as follows:
(1) under the conditions of gas shield, the pure magnesium ingot prepared in proportion is first preheated to 390 DEG C in crucible furnace, then
It is warming up to 680 DEG C of progress sufficiently fusing and obtains Serum Magnesium；
(2) fine aluminium prepared by AZ80 component ratio and pure zinc are added in Serum Magnesium, continue to keep the temperature at 680 DEG C to complete
Fusing, then heats to 730 DEG C and is sufficiently stirred, keep ingredient uniform；
(3) calcirm-fluoride is added and No. 2 solvents is refined, refining temperature is set as 730 DEG C, stands heat preservation 5-10 minutes；No. 2
The dosage of solvent is the 2% of pure magnesium ingot quality, and the dosage of the anhydrous calcirm-fluoride is the 10% of No. 2 solvent qualities；
(4) aluminium alloy stood is moved into another crucible and is warming up to 740 DEG C；
(5) proportioned grain refiner is fitted into iron cage in the ratio of pure magnesium ingot quality 8% and is placed in magnesium alloy solution
Then portion is stirred, argon gas is poured in mechanical agitation process 5 minutes, process is exhausted；
(6) precipitating is poured after standing 30 minutes under conditions of 700 DEG C, can achieve 100 μ of crystal grain after product casting
The fineness of grain quality index of m.
Embodiment 4
The grain refiner of the significant Refining Mg Alloy tissue of the present embodiment, it is by paraffin, graphite and fluorite by quality
It is mixed than 60:35:5.
The preparation method of the grain refiner of the significant Refining Mg Alloy tissue of the present embodiment, steps are as follows: matching by weight
Than three kinds of paraffin, graphite and fluorite raw materials are mixed and mixed thoroughly, it is placed on heating in flat crucible, it is cooling after waiting paraffin all to melt,
It is spare to be then cut into 40mm × 40mm × 40mm small cube.
The method of the grain refiner cast magnesium alloy of the significant Refining Mg Alloy tissue of the present embodiment, steps are as follows:
(1) under the conditions of gas shield, the pure magnesium ingot prepared in proportion is first preheated to 400 DEG C in crucible furnace, then
It is warming up to 670 DEG C of progress sufficiently fusing and obtains Serum Magnesium；
(2) fine aluminium prepared by AZ80 component ratio and pure zinc are added in Serum Magnesium, continue to keep the temperature at 670 DEG C to complete
Fusing, then heats to 740 DEG C and is sufficiently stirred, keep ingredient uniform；
(3) calcirm-fluoride is added and No. 2 solvents is refined, refining temperature is set as 750 DEG C, stands heat preservation 5-10 minutes；No. 2
The dosage of solvent is the 2% of pure magnesium ingot quality, and the dosage of the anhydrous calcirm-fluoride is the 10% of No. 2 solvent qualities；
(4) aluminium alloy stood is moved into another crucible and is warming up to 750 DEG C；
(5) proportioned grain refiner is fitted into iron cage in the ratio of pure magnesium ingot quality 8% and is placed in magnesium alloy solution
Then portion is stirred, argon gas is poured in mechanical agitation process 5 minutes, process is exhausted；
(6) precipitating is poured after standing 30 minutes under conditions of 700 DEG C, can achieve 100 μ of crystal grain after product casting
The fineness of grain quality index of m.
Basic principles and main features and advantages of the present invention of the invention have 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 (3)
1. a kind of method of the grain refiner cast magnesium alloy using significant Refining Mg Alloy tissue, it is characterised in that step is such as
Under:
(1) under the conditions of gas shield, the pure magnesium ingot prepared in proportion is first preheated to 380-400 DEG C in crucible furnace, then
It is warming up to 670-690 DEG C of progress sufficiently fusing and obtains Serum Magnesium；
(2) fine aluminium prepared by AZ80 component ratio and pure zinc are added in Serum Magnesium, continue to keep the temperature at 670-690 DEG C to complete
Fusing, then heats to 730-740 DEG C and is sufficiently stirred, keep ingredient uniform；
(3) calcirm-fluoride is added and No. 2 flux is refined, refining temperature is set as 730-750 DEG C, stands heat preservation 5-10 minutes；
(4) aluminium alloy stood is moved into another crucible and is warming up to 740-750 DEG C；
(5) proportioned grain refiner is packed into iron cage and is placed in the middle part of magnesium alloy solution, be then stirred, stirred in machinery
Argon gas is poured 5 minutes during mixing, and process is exhausted；
(6) precipitating is poured after standing 30 minutes under conditions of 690-700 DEG C, can achieve 100 μ of crystal grain after product casting
The fineness of grain quality index of m；
The grain refiner of the significant Refining Mg Alloy tissue is mixed by paraffin, graphite and fluorite 60:35:5 in mass ratio
It is made；
The preparation method of the grain refiner of the significant Refining Mg Alloy tissue, steps are as follows: by weight ratio by paraffin,
The three kinds of raw material mixing of graphite and fluorite are mixed thoroughly, and heating in flat crucible is placed on, cooling after waiting paraffin all to melt, and are then cut into
40mm × 40mm × 40mm small cube is spare.
2. the method for the grain refiner cast magnesium alloy according to claim 1 using significant Refining Mg Alloy tissue,
It is characterized by: the dosage of No. 2 flux is the 2% of pure magnesium ingot quality in the step (3), the dosage of the anhydrous calcirm-fluoride is 2
The 10% of number flux quality.
3. the method for the grain refiner cast magnesium alloy according to claim 1 using significant Refining Mg Alloy tissue,
It is characterized by: the dosage of grain refiner is the 8% of pure magnesium ingot quality in the step (5).
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB608941A (en) * | 1944-12-29 | 1948-09-23 | Magnesium Elektron Ltd | Process for refining the grain of magnesium base alloys |
| GB784445A (en) * | 1955-07-01 | 1957-10-09 | Magnesium Elektron Ltd | Improvements in or relating to the treatment of magnesium base alloys |
| NO922266D0 (en) * | 1992-06-10 | 1992-06-10 | Norsk Hydro As | PROCEDURE FOR THE PREPARATION OF THIXTOTROP MAGNESIUM ALLOYS |
| JP4162875B2 (en) * | 2001-07-30 | 2008-10-08 | 徹一 茂木 | Grain refinement method for magnesium alloy castings |
| CN101643871B (en) * | 2009-08-24 | 2011-04-13 | 吉林大学 | Super-high-plasticity high-strength cast magnesium alloy and preparation method thereof |
| CN101812607B (en) * | 2010-04-22 | 2011-12-28 | 东北轻合金有限责任公司 | Magnesium alloy refiner and preparation method thereof |
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