CN1583327A - Grain refining agents for megnesium or its alloy and their preparation and use - Google Patents
Grain refining agents for megnesium or its alloy and their preparation and use Download PDFInfo
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- CN1583327A CN1583327A CN 200410044836 CN200410044836A CN1583327A CN 1583327 A CN1583327 A CN 1583327A CN 200410044836 CN200410044836 CN 200410044836 CN 200410044836 A CN200410044836 A CN 200410044836A CN 1583327 A CN1583327 A CN 1583327A
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- magnesium
- magnesium alloy
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Abstract
A crystal grain fining agent for Mg or Mg-alloy is prepared from aluminium powder and carbon powder through baking at 80-100 deg.C for 50-60 min, proportionally mixing, and pressing to become blocks. It is applied by proportionally adding the blocks to molten Mg or Mg-alloy and stirring.
Description
(1) technical field the present invention relates to a kind of magnesium or used for magnesium alloy additive and preparation and using method, relates in particular to a kind of magnesium or grain refiner for magnesium alloy and preparation thereof and using method.
(2) background technology
The density (proportion) of magnesium or magnesium alloy (as magnesium-aluminium, magnesium-zinc, magnesium-rare earth etc.) is little, and specific stiffness and specific strength height are structural metallic materials the lightest in the industrial materials.Owing to adopted magnesium alloy structural part on automobile and the electronics industry, make Application of Magnesium obtain promoting in recent years.Yet different with the metal that iron, copper and aluminium etc. are commonly used, magnesium belongs to hexagonal structure, the plastic deformation poor processability, so the crystal grain of refinement ingot casting is just especially important for deformation processing.Industrial can be used on adds the purpose that fining agent reaches crystal grain thinning in the fusion process
(3) summary of the invention:
The magnesium that is used for refinement magnesium or magnesium alloy ingot tissue that technical problem the present invention proposes to add in a kind of low cost, high efficiency magnesium or the magnesium alloy smelting process or grain refiner for magnesium alloy and preparation and using method.
Technical scheme
A kind of magnesium or grain refiner for magnesium alloy are made up of aluminium powder and carbon dust, and its quality proportioning is 3: 1～6: 1
The preparation method of a kind of magnesium according to claim 1 or grain refiner for magnesium alloy, the first step, with aluminium powder and carbon dust under 80～100 degrees centigrade, and dried by the fire 50～60 minutes, second step, mixed 3～6 hours with common mixed powder machine, in second step, mixed powder is pressed into piece on 50～200 tons forcing press.
The using method of a kind of magnesium or grain refiner for magnesium alloy adds magnesium or magnesium alloy grains agent block in the magnesium or magnesium alloy fused mass that has melted, and is stirred to and mixes, and the addition of fining agent is 0.1%～1.0% of magnesium or a magnesium alloy fused mass quality.
Technique effect
(1) in magnesium or magnesium alloy smelting process, behind the above-mentioned fining agent of adding, can in magnesium melt, form Al
4C
3Forming core core when particle, this particle can become magnesium and solidify, thereby obviously refinement alloy cast ingot or THE STRUCTURE OF CASTINGS, and the deforming technique performance and the mechanical property of alloy are improved.
(2) owing to form Al
4C
3The mass percent of desired aluminium and carbon is respectively: aluminium: 75%, and carbon: 25%, so theoretically, the mass ratio of aluminium and carbon should be controlled at 3: 1.Because aluminium powder and carbon dust have scaling loss in various degree during melting, can the amount of aluminium powder is anti-wideer, this can not return material property to bring harm.Otherwise excessive carbon can become impurity, and alloy organizing and performance are brought adverse influence, so aluminium powder and carbon dust best in quality proportioning are 3: 1～4: 1.
(3) purity of above-mentioned aluminium powder and carbon dust all requires more than 99%.Powder use than low-purity is to bring impurity into melt, and the performance of alloy is brought adverse effect; If the granularity of powder then is not easy to mix too big.
(4) preparation is during alloy, and the first step under 80～100 degrees centigrade, dry by the fire aluminium powder and carbon dust 50～60 minutes, if too high-alumina fly cognition oxidation of temperature, even scaling loss; Temperature is too low then to need the longer time to dry; Second step, to mix 3～6 hours with common mixed powder machine, the mixed powder time is lower than 3 hours, and two kinds of powders can not fully mix.The 3rd step was pressed into piece at pressure on greater than 50 tons forcing press with mixed powder, if pressure is too small, and powder agglomates abundant reaction response in melt.
(5) drying requirement of powder is at SO
2Or SF
6Carry out in the protective atmosphere, do not adopt protective atmosphere, the easy oxidation of powder.
(6) mixed-powder is pressed into piece, can easier adding magnesium or magnesium alloy fused mass in, and unlikely floating on the surface.
(7) add after the fining agent, the mechanical property of magnesium or magnesium alloy has obtained significantly improving, and following table is the room-temperature mechanical property of sheet material annealed state (200 ℃) after the embodiment of the invention 4 employing grain refiners.
(8) add after the fining agent, the mechanical property of as cast condition magnesium ingot is greatly improved, and following table is the room-temperature mechanical property of as cast condition magnesium ingot after the employing grain refiner of the present invention.
| Composition | ?σ b(MPa) | ?σ 0.2(MPa) | ??δ(％) |
| ?Mg | ????38 | ????16 | ????6.5 |
| The Mg+0.5% fining agent | ????84 | ????38 | ????14.3 |
| The Mg+1.0% fining agent | ????114 | ????48 | ????13.3 |
(9) add intensity and the plasticity that fining agent of the present invention equally also significantly improves alloy in magnesium alloy, shown in the following table is after Mg-3Al (percetage by weight of aluminium content is 3%) adds fining agent, the mechanical property of as-cast specimen:
| Composition | ??σ b(MPa) | ??σ 0.2(MPa) | ???δ(％) |
| ??Mg-3Al | ????82 | ????51 | ????6.8 |
| Mg-3Al+0.3% fining agent | ????110 | ????62 | ????8.2 |
| Mg-3Al+0.5% fining agent | ????140 | ????66 | ????8.8 |
(4) description of drawings
Fig. 1 is the casting tissue that the present invention does not add the fining agent magnesium ingot.
Fig. 2 is the tissue that the present invention adds magnesium ingot casting behind 0.5% (percetage by weight) fining agent, casting and cooling condition and
Ingot casting among Fig. 2 is identical.
Fig. 3 is the tissue that the present invention adds magnesium ingot casting behind 1.0% (percetage by weight) fining agent, casting and cooling condition and
Fig. 2 is identical with ingot casting among Fig. 3.
(5) specific embodiments
1 one kinds of magnesium of embodiment or the magnesium alloy magnadure of aluminium 5% (as contain) are used grain refiner, are made up of aluminium powder and carbon dust, and aluminium powder or carbon dust can be that purity is greater than 99%, granularity is greater than 200 purpose powder, can be 200 orders, 300 orders, 350 orders, 400 orders, its quality proportioning is 3: 1～6: 1, for example can be 3: 1,4: 1,5: 1,6: 1.
2 one kinds of magnesium of embodiment or the magnesium alloy magnadure of aluminium 3% (as contain) grain refiner, form by aluminium powder and carbon dust, aluminium powder or carbon dust can be that purity is greater than 99%, granularity is greater than 200 purpose powder, its quality proportioning is 3: 1～6: 1, is that 3: 1～4: 1 range effect are best with proportioning especially wherein, for example 3: 1,7: 2,4: 1.
The preparation method of 3 one kinds of magnesium of embodiment or grain refiner for magnesium alloy, the first step, with aluminium powder and carbon dust under 80～100 degrees centigrade, dried by the fire 50～60 minutes, and in second step, mixed 3～6 hours with common mixed powder machine (market can be buied), second step, mixed powder is pressed into piece on 50～200 tons forcing press, in the present embodiment, oven dry can be at SO
2Or SF
6Carry out under the protective atmosphere.
4 one kinds of magnesium of embodiment or magnesium alloy (be as manganese content 0.5% magnesium alloy) are with the using method of grain refiner, magnesium or grain refiner for magnesium alloy block are added in the magnesium or magnesium alloy fused mass that has melted, and be stirred to and mix, the addition of fining agent is 0.1%～1.0% of magnesium or a magnesium alloy fused mass quality, for example can be 0.1%, 0.3%, 0.5%, 0.7%, 0.9%, 1.0%.
The present invention can prepare with following technology and use above-mentioned fining agent:
1) raw material adopt aluminium powder and carbon dust.The purity requirement of powder is greater than 99%, and the granularity of powder is 200 orders.
2) two kinds of powder are mixed with common mixed powder machine, incorporation time is 3-6 hour.
3) with mixed powder, bake out temperature is 80-100 ℃, and the time is 50-60 minute.Oven dry is preferably in the protective atmosphere (carbon dioxide or sulfur hexafluoride atmosphere) to be carried out.
4) mixed-powder is pressed into piece on the press more than 60 tons, the Weight control of each piece is between 50-200g, and shape is not limit.
This powder agglomates promptly can be used as fining agent.The powder agglomates of preparation then will leave in the vessel of drier if do not use immediately.
5) after each operation of magnesium or the melting of magnesium alloy gold is finished, add fining agent of the present invention again.Reply magnesium or liquid magnesium alloy stirs during interpolation, evenly after, can cast.
Claims (6)
1. magnesium or grain refiner for magnesium alloy is characterized in that being made up of aluminium powder and carbon dust, and its quality proportioning is 3: 1～6: 1.
2. magnesium according to claim 1 or grain refiner for magnesium alloy is characterized in that the best in quality proportioning of aluminium powder and carbon dust is: 3: 1～4: 1.
3. magnesium according to claim 1 and 2 or grain refiner for magnesium alloy, the purity that it is characterized in that aluminium powder or carbon dust are greater than 99%, and the granularity of powder is greater than 200 orders.
4. the preparation method of magnesium according to claim 1 or grain refiner for magnesium alloy, it is characterized in that: the first step, with aluminium powder and carbon dust under 80～100 degrees centigrade, dried by the fire 50～60 minutes, second step, mixed 3～6 hours with common mixed powder machine, in the 3rd step, mixed powder is pressed into piece on 50～200 tons forcing press.
5. the preparation method of magnesium according to claim 4 or grain refiner for magnesium alloy is characterized in that aluminium powder and carbon dust are at SO
2Or SF
6Dry in the protective atmosphere.
6. the using method of magnesium according to claim 1 or grain refiner for magnesium alloy, magnesium or magnesium alloy grains agent block are added in the magnesium or magnesium alloy fused mass that has melted, and be stirred to and mix, the addition that it is characterized in that fining agent is 0.1%～1.0% of magnesium or a magnesium alloy fused mass quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410044836 CN1583327A (en) | 2004-05-31 | 2004-05-31 | Grain refining agents for megnesium or its alloy and their preparation and use |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410044836 CN1583327A (en) | 2004-05-31 | 2004-05-31 | Grain refining agents for megnesium or its alloy and their preparation and use |
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| CN1583327A true CN1583327A (en) | 2005-02-23 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071344A (en) * | 2011-02-25 | 2011-05-25 | 中国矿业大学 | Preparation method for refined magnesium alloy solidification tissue |
| CN102146530A (en) * | 2011-03-15 | 2011-08-10 | 新星化工冶金材料(深圳)有限公司 | Magnesium and magnesium alloy grain refining agent and preparation method thereof |
| CN102146529A (en) * | 2011-03-15 | 2011-08-10 | 新星化工冶金材料(深圳)有限公司 | Method for preparing aluminum-zirconium-carbon intermediate alloy |
| WO2012027989A1 (en) * | 2011-03-15 | 2012-03-08 | 新星化工冶金材料(深圳)有限公司 | Application of aluminium-zirconium-carbon master alloy in deforming process of magnesium or magnesium alloy |
| CN102776422A (en) * | 2012-08-17 | 2012-11-14 | 临江市东锋有色金属股份有限公司 | High-efficiency magnesium alloy grain refiner and preparation method thereof |
| CN105671320A (en) * | 2016-03-30 | 2016-06-15 | 河北工业大学 | Recycling method of foamed magnesium |
| CN107699720A (en) * | 2017-11-24 | 2018-02-16 | 隆达铝业（烟台）有限公司 | A kind of aluminum alloy modifier and carry out the technique of aluminium alloy casting with it |
| CN109055790A (en) * | 2018-08-16 | 2018-12-21 | 北京科技大学广州新材料研究院 | A kind of crystal fining method of magnesium and magnesium alloy |
| CN109475932A (en) * | 2016-07-12 | 2019-03-15 | 韩国机械研究院 | The crystal fining method of grain refiner of magnesium alloy and preparation method thereof and magnesium alloy |
-
2004
- 2004-05-31 CN CN 200410044836 patent/CN1583327A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071344B (en) * | 2011-02-25 | 2012-07-04 | 中国矿业大学 | Preparation method for refined magnesium alloy solidification tissue |
| CN102071344A (en) * | 2011-02-25 | 2011-05-25 | 中国矿业大学 | Preparation method for refined magnesium alloy solidification tissue |
| GB2494352A (en) * | 2011-03-15 | 2013-03-06 | Shenzhen Sunxing Light Alloys Materials Co Ltd | Grain refiner for magnesium and magnesium alloy and preparation method thereof |
| GB2494354A (en) * | 2011-03-15 | 2013-03-06 | Shenzhen Sunxing Light Alloys Materials Co Ltd | Preparation method of Al-Zr-C master alloy |
| WO2012027990A1 (en) * | 2011-03-15 | 2012-03-08 | 新星化工冶金材料(深圳)有限公司 | Grain refiner for magnesium and magnesium alloy and preparation method thereof |
| WO2012027989A1 (en) * | 2011-03-15 | 2012-03-08 | 新星化工冶金材料(深圳)有限公司 | Application of aluminium-zirconium-carbon master alloy in deforming process of magnesium or magnesium alloy |
| CN102146529A (en) * | 2011-03-15 | 2011-08-10 | 新星化工冶金材料(深圳)有限公司 | Method for preparing aluminum-zirconium-carbon intermediate alloy |
| GB2494593B (en) * | 2011-03-15 | 2013-10-30 | Shenzhen Sunxing Light Alloys Materials Co Ltd | Use of aluminium-zirconium-carbon intermediate alloy in wrought processing of magnesium or magnesium alloys |
| CN102146530A (en) * | 2011-03-15 | 2011-08-10 | 新星化工冶金材料(深圳)有限公司 | Magnesium and magnesium alloy grain refining agent and preparation method thereof |
| WO2012027992A1 (en) * | 2011-03-15 | 2012-03-08 | 新星化工冶金材料(深圳)有限公司 | Preparation method of al-zr-c master alloy |
| GB2494593A (en) * | 2011-03-15 | 2013-03-13 | Shenzhen Sunxing Light Alloys Materials Co Ltd | Application of aluminium-zirconium-carbon master alloy in deforming process of magnesium or magnesium alloy |
| GB2494354B (en) * | 2011-03-15 | 2013-05-15 | Shenzhen Sunxing Light Alloys Materials Co Ltd | Method for producing aluminium-zirconium-carbon intermediate alloy |
| GB2494352B (en) * | 2011-03-15 | 2013-10-30 | Shenzhen Sunxing Light Alloys Materials Co Ltd | Grain refiner for magnesium and magnesium alloys and method for producing the same |
| CN102776422A (en) * | 2012-08-17 | 2012-11-14 | 临江市东锋有色金属股份有限公司 | High-efficiency magnesium alloy grain refiner and preparation method thereof |
| CN105671320A (en) * | 2016-03-30 | 2016-06-15 | 河北工业大学 | Recycling method of foamed magnesium |
| CN109475932A (en) * | 2016-07-12 | 2019-03-15 | 韩国机械研究院 | The crystal fining method of grain refiner of magnesium alloy and preparation method thereof and magnesium alloy |
| CN107699720A (en) * | 2017-11-24 | 2018-02-16 | 隆达铝业（烟台）有限公司 | A kind of aluminum alloy modifier and carry out the technique of aluminium alloy casting with it |
| CN109055790A (en) * | 2018-08-16 | 2018-12-21 | 北京科技大学广州新材料研究院 | A kind of crystal fining method of magnesium and magnesium alloy |
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