CN107398548A - A kind of grain refiner and its preparation and application method of significantly Refining Mg Alloy tissue - Google Patents
A kind of grain refiner and its preparation and application method of significantly Refining Mg Alloy tissue Download PDFInfo
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- CN107398548A CN107398548A CN201710627426.3A CN201710627426A CN107398548A CN 107398548 A CN107398548 A CN 107398548A CN 201710627426 A CN201710627426 A CN 201710627426A CN 107398548 A CN107398548 A CN 107398548A
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- alloy
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- grain refiner
- grain
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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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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of grain refiner and its preparation and application method of significantly Refining Mg Alloy tissue, it is by paraffin, graphite and fluorite in mass ratio 60：35：5 mixing are mixed thoroughly, are placed in flat crucible and are heated, and paraffin cools down after all melting, and are then cut into that blockage is standby, utilize the method for the grain refiner cast magnesium alloy of notable Refining Mg Alloy tissue：Alloying refining is carried out when magnesium alloy is melted to 740 DEG C, refining process is to add magnesium alloy, zinc ingot metal carries out mechanical agitation again, slagging-off, a pipetting processes are carried out again, after another kier being moved on to Deng aluminium alloy, it is being warming up to 740 DEG C, the grain refiner matched is loaded in 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 stands 30 minutes and poured into a mould, the fineness of grain quality index of 100 μm of crystal grain can be reached after product cast, 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 significantly Refining Mg Alloy tissue is thin
Agent and its preparation and application method.
Background technology
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 are improving magnesium alloy mechanical property and are promoting magnesium alloy application etc. with important
Effect and status.
Common magnesium alloy series generally production refining grain size is 1000um, with the requirement in market, need to improve alloy
Intensity.User requires that refining grain size is below 100um.Ordinary magnesium alloy is extremely difficult to require, to reach such index,
All take the big blanks of ready-made magnesium alloy diameter 300mm to try again 420 DEG C at present to heat and ability after extruding compression blank technique
Fineness of grain 100um indexs can be reached, so increase by a procedure and cause ton cost to increase by 1000 yuan.Lose the market price
Competitiveness.
The content of the invention
For problems of the prior art, the present invention provides a kind of grain refiner of significantly Refining Mg Alloy tissue
And its prepare and application method, using the fining agent casting magnesium alloy crystallite dimension be less than 100 μm, increase alloy strength with
Toughness.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of grain refiner of significantly Refining Mg Alloy tissue, it is by paraffin, graphite and fluorite in mass ratio 60：35：5 is mixed
Conjunction is made.
The preparation method of the grain refiner of described notable Refining Mg Alloy tissue, step are as follows：By weight ratio will
Three kinds of paraffin, graphite and fluorite raw material mixing are mixed thoroughly, are placed in flat crucible and are heated, wait paraffin to be cooled down after all melting, then
The blockage for being cut into 40mm × 40mm × 40mm is standby.
The method of the grain refiner cast magnesium alloy of described notable Refining Mg Alloy tissue, step 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, then
It is warming up to 670-690 DEG C of progress fully fusing and obtains Serum Magnesium；
（2）The fine aluminium prepared by AZ80 component ratios and pure zinc are added in Serum Magnesium, continue to be incubated to complete at 670-690 DEG C
Fusing, then heats to 730-740 DEG C and is sufficiently stirred, make composition uniform；
（3）Add calcirm-fluoride and No. 2 solvents are refined, refining temperature is set to 730-750 DEG C, stands insulation 5-10 minutes；
（4）The aluminium alloy stood is moved into another crucible and is warming up to 740-750 DEG C；
（5）The grain refiner matched is loaded in iron cage and is placed in the middle part of magnesium alloy solution, is then stirred, is stirred in machinery
Argon gas is poured during mixing 5 minutes, process is exhausted；
（6）Precipitate under conditions of 690-700 DEG C and poured into a mould after standing 30 minutes, can reach the μ of crystal grain 100 after product cast
M fineness of grain quality index.
The step（3）In the dosages of No. 2 solvents be the 2% of pure magnesium ingot quality, the dosage of the anhydrous calcirm-fluoride is No. 2
The 10% of solvent quality.
The step（5）The dosage of middle grain refiner is the 8% of pure magnesium ingot quality.
Beneficial effects of the present invention：Paraffin, graphite and fluorite add under melting state, drop impurity effect are played, molten
Under molten state the significantly more efficient refinement of alloying pellet can be fitted close, so as to reach alloy refinement effect；Secondly, the present invention
In advance by paraffin, graphite and fluorite in mass ratio 60：35：5 are placed on heating in flat crucible, wait paraffin to be cooled down after all melting,
It is standby to be then cut into 40mm × 40mm × 40mm blockage, paraffin is all melted and enables graphite and fluorite after thawing
Paraffin in be uniformly distributed, and using when load in 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 whole magnesium alloy solution, so as to significantly improve the refinement degree of finished product magnesium alloy, improve intensity and toughness.
Embodiment
With reference to specific embodiment, the present invention will be further described.It should be understood that following examples are merely to illustrate this
Invention can make one not for limitation the scope of the present invention, the person skilled in the art in the field according to the content of foregoing invention
A little nonessential modifications and adaptations.
Embodiment 1
The grain refiner of the notable Refining Mg Alloy tissue of the present embodiment, it is by paraffin, graphite and fluorite in mass ratio 60：
35：5 are mixed.
The preparation method of the grain refiner of the notable Refining Mg Alloy tissue of the present embodiment, step are as follows：Match somebody with somebody by weight
Than three kinds of paraffin, graphite and fluorite raw materials are mixed and mixed thoroughly, it is placed in flat crucible and heats, wait paraffin to be cooled down after all melting,
The blockage for being then cut into 40mm × 40mm × 40mm is standby.
The method of the grain refiner cast magnesium alloy of the notable Refining Mg Alloy tissue of the present embodiment, step 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 heated up
Fully fusing, which is carried out, to 670 DEG C obtains Serum Magnesium；
（2）The fine aluminium prepared by AZ80 component ratios and pure zinc are added in Serum Magnesium, continue to be incubated at 670 DEG C to completely molten
Change, then heat to 730 DEG C and be sufficiently stirred, make composition uniform；
（3）Add calcirm-fluoride and No. 2 solvents are refined, refining temperature is set to 750 DEG C, stands insulation 5-10 minutes；No. 2 solvents
Dosage be the 2% of pure magnesium ingot quality, the dosage of the anhydrous calcirm-fluoride is the 10% of No. 2 solvent qualities；
（4）The aluminium alloy stood is moved into another crucible and is warming up to 750 DEG C；
（5）The grain refiner matched is loaded in iron cage in the ratio of pure magnesium ingot quality 8% and is placed in the middle part of magnesium alloy solution,
Then it is stirred, argon gas is poured in mechanical agitation process 5 minutes, process is exhausted；
（6）Precipitate under conditions of 690 DEG C and poured into a mould after standing 30 minutes, can reach 100 μm of crystal grain after product cast
Fineness of grain quality index.
Embodiment 2
The grain refiner of the notable Refining Mg Alloy tissue of the present embodiment, it is by paraffin, graphite and fluorite in mass ratio 60：
35：5 are mixed.
The preparation method of the grain refiner of the notable Refining Mg Alloy tissue of the present embodiment, step are as follows：Match somebody with somebody by weight
Than three kinds of paraffin, graphite and fluorite raw materials are mixed and mixed thoroughly, it is placed in flat crucible and heats, wait paraffin to be cooled down after all melting,
The blockage for being then cut into 40mm × 40mm × 40mm is standby.
The method of the grain refiner cast magnesium alloy of the notable Refining Mg Alloy tissue of the present embodiment, step 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 heated up
Fully fusing, which is carried out, to 690 DEG C obtains Serum Magnesium；
（2）The fine aluminium prepared by AZ80 component ratios and pure zinc are added in Serum Magnesium, continue to be incubated at 690 DEG C to completely molten
Change, then heat to 740 DEG C and be sufficiently stirred, make composition uniform；
（3）Add calcirm-fluoride and No. 2 solvents are refined, refining temperature is set to 740 DEG C, stands insulation 5-10 minutes；No. 2 solvents
Dosage be the 2% of pure magnesium ingot quality, the dosage of the anhydrous calcirm-fluoride is the 10% of No. 2 solvent qualities；
（4）The aluminium alloy stood is moved into another crucible and is warming up to 740 DEG C；
（5）The grain refiner matched is loaded in iron cage in the ratio of pure magnesium ingot quality 8% and is placed in the middle part of magnesium alloy solution,
Then it is stirred, argon gas is poured in mechanical agitation process 5 minutes, process is exhausted；
（6）Precipitate under conditions of 700 DEG C and poured into a mould after standing 30 minutes, can reach 100 μm of crystal grain after product cast
Fineness of grain quality index.
Embodiment 3
The grain refiner of the notable Refining Mg Alloy tissue of the present embodiment, it is by paraffin, graphite and fluorite in mass ratio 60：
35：5 are mixed.
The preparation method of the grain refiner of the notable Refining Mg Alloy tissue of the present embodiment, step are as follows：Match somebody with somebody by weight
Than three kinds of paraffin, graphite and fluorite raw materials are mixed and mixed thoroughly, it is placed in flat crucible and heats, wait paraffin to be cooled down after all melting,
The blockage for being then cut into 40mm × 40mm × 40mm is standby.
The method of the grain refiner cast magnesium alloy of the notable Refining Mg Alloy tissue of the present embodiment, step 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 heated up
Fully fusing, which is carried out, to 680 DEG C obtains Serum Magnesium；
（2）The fine aluminium prepared by AZ80 component ratios and pure zinc are added in Serum Magnesium, continue to be incubated at 680 DEG C to completely molten
Change, then heat to 730 DEG C and be sufficiently stirred, make composition uniform；
（3）Add calcirm-fluoride and No. 2 solvents are refined, refining temperature is set to 730 DEG C, stands insulation 5-10 minutes；No. 2 solvents
Dosage be the 2% of pure magnesium ingot quality, the dosage of the anhydrous calcirm-fluoride is the 10% of No. 2 solvent qualities；
（4）The aluminium alloy stood is moved into another crucible and is warming up to 740 DEG C；
（5）The grain refiner matched is loaded in iron cage in the ratio of pure magnesium ingot quality 8% and is placed in the middle part of magnesium alloy solution,
Then it is stirred, argon gas is poured in mechanical agitation process 5 minutes, process is exhausted；
（6）Precipitate under conditions of 700 DEG C and poured into a mould after standing 30 minutes, can reach 100 μm of crystal grain after product cast
Fineness of grain quality index.
Embodiment 4
The grain refiner of the notable Refining Mg Alloy tissue of the present embodiment, it is by paraffin, graphite and fluorite in mass ratio 60：
35：5 are mixed.
The preparation method of the grain refiner of the notable Refining Mg Alloy tissue of the present embodiment, step are as follows：Match somebody with somebody by weight
Than three kinds of paraffin, graphite and fluorite raw materials are mixed and mixed thoroughly, it is placed in flat crucible and heats, wait paraffin to be cooled down after all melting,
The blockage for being then cut into 40mm × 40mm × 40mm is standby.
The method of the grain refiner cast magnesium alloy of the notable Refining Mg Alloy tissue of the present embodiment, step 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 heated up
Fully fusing, which is carried out, to 670 DEG C obtains Serum Magnesium；
（2）The fine aluminium prepared by AZ80 component ratios and pure zinc are added in Serum Magnesium, continue to be incubated at 670 DEG C to completely molten
Change, then heat to 740 DEG C and be sufficiently stirred, make composition uniform；
（3）Add calcirm-fluoride and No. 2 solvents are refined, refining temperature is set to 750 DEG C, stands insulation 5-10 minutes；No. 2 solvents
Dosage be the 2% of pure magnesium ingot quality, the dosage of the anhydrous calcirm-fluoride is the 10% of No. 2 solvent qualities；
（4）The aluminium alloy stood is moved into another crucible and is warming up to 750 DEG C；
（5）The grain refiner matched is loaded in iron cage in the ratio of pure magnesium ingot quality 8% and is placed in the middle part of magnesium alloy solution,
Then it is stirred, argon gas is poured in mechanical agitation process 5 minutes, process is exhausted；
（6）Precipitate under conditions of 700 DEG C and poured into a mould after standing 30 minutes, can reach 100 μm of crystal grain after product cast
Fineness of grain quality index.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The skill of the industry
For art personnel it should be appreciated that the present invention is not limited to the above embodiments, described in above-described embodiment and specification is explanation
The principle of the present invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, 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 (5)
1. a kind of grain refiner of significantly Refining Mg Alloy tissue, it is characterised in that it is by matter by paraffin, graphite and fluorite
Measure ratio 60：35：5 are mixed.
2. the preparation method of the significantly grain refiner of Refining Mg Alloy tissue according to claim 1, it is characterised in that
Step is as follows：Three kinds of paraffin, graphite and fluorite raw materials are mixed and mixed thoroughly by weight ratio, is placed in flat crucible and heats, wait stone
Wax cools down after all melting, and the blockage for being then cut into 40mm × 40mm × 40mm is standby.
3. the method for the grain refiner cast magnesium alloy using the notable Refining Mg Alloy tissue described in claim 1, it is special
Sign is that step is 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, then
It is warming up to 670-690 DEG C of progress fully fusing and obtains Serum Magnesium；
（2）The fine aluminium prepared by AZ80 component ratios and pure zinc are added in Serum Magnesium, continue to be incubated to complete at 670-690 DEG C
Fusing, then heats to 730-740 DEG C and is sufficiently stirred, make composition uniform；
（3）Add calcirm-fluoride and No. 2 solvents are refined, refining temperature is set to 730-750 DEG C, stands insulation 5-10 minutes；
（4）The aluminium alloy stood is moved into another crucible and is warming up to 740-750 DEG C；
（5）The grain refiner matched is loaded in iron cage and is placed in the middle part of magnesium alloy solution, is then stirred, is stirred in machinery
Argon gas is poured during mixing 5 minutes, process is exhausted；
（6）Precipitate under conditions of 690-700 DEG C and poured into a mould after standing 30 minutes, can reach the μ of crystal grain 100 after product cast
M fineness of grain quality index.
4. the method for the significantly grain refiner cast magnesium alloy of Refining Mg Alloy tissue according to claim 3, it is special
Sign is：The step（3）In the dosages of No. 2 solvents be the 2% of pure magnesium ingot quality, the dosage of the anhydrous calcirm-fluoride is No. 2 molten
The 10% of agent quality.
5. the method for the significantly grain refiner cast magnesium alloy of Refining Mg Alloy tissue according to claim 3, it is special
Sign is：The step（5）The dosage of middle grain refiner is the 8% of pure magnesium ingot quality.
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| CN201710627426.3A CN107398548B (en) | 2017-07-28 | 2017-07-28 | A kind of grain refiner of significant Refining Mg Alloy tissue and its preparation and application method |
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Citations (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 |
| EP0575796A1 (en) * | 1992-06-10 | 1993-12-29 | NORSK HYDRO a.s. | Method for production of thixotropic magnesium alloys |
| US20030019547A1 (en) * | 2001-07-30 | 2003-01-30 | Tetsuichi Motegi (30%) | Method of grain refining cast magnesium alloy |
| CN101643871A (en) * | 2009-08-24 | 2010-02-10 | 吉林大学 | Super-high-plasticity high-strength cast magnesium alloy and preparation method thereof |
| CN101812607A (en) * | 2010-04-22 | 2010-08-25 | 东北轻合金有限责任公司 | Magnesium alloy refiner and preparation method thereof |
-
2017
- 2017-07-28 CN CN201710627426.3A patent/CN107398548B/en active Active
Patent Citations (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 |
| EP0575796A1 (en) * | 1992-06-10 | 1993-12-29 | NORSK HYDRO a.s. | Method for production of thixotropic magnesium alloys |
| US20030019547A1 (en) * | 2001-07-30 | 2003-01-30 | Tetsuichi Motegi (30%) | Method of grain refining cast magnesium alloy |
| CN101643871A (en) * | 2009-08-24 | 2010-02-10 | 吉林大学 | Super-high-plasticity high-strength cast magnesium alloy and preparation method thereof |
| CN101812607A (en) * | 2010-04-22 | 2010-08-25 | 东北轻合金有限责任公司 | Magnesium alloy refiner and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 《铸造技术标准手册》编委会: "《铸造技术标准手册》", 31 May 2004, 中国物资出版社 * |
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