CN1410566A - Fining agent used for magnesium alloy and its preparation method - Google Patents
Fining agent used for magnesium alloy and its preparation method Download PDFInfo
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- CN1410566A CN1410566A CN 02135921 CN02135921A CN1410566A CN 1410566 A CN1410566 A CN 1410566A CN 02135921 CN02135921 CN 02135921 CN 02135921 A CN02135921 A CN 02135921A CN 1410566 A CN1410566 A CN 1410566A
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Abstract
A crystal grain fining agent for Mg-alloy contains Al (72.5-99.8%), C (0.02-20%) and Mg (0-10 %), and is prepared through proportionally mixing aluminium powder, graphite powder and magnesium powder, baking, die pressing, and calcining at 700-1000 deg.C in vacuum or under inertial gas for at least 25 min.
Description
Technical field
The invention belongs to metal material field, particularly relate to a kind of fining agent used for magnesium alloy that is used for refinement magnesium alloy crystal grain and preparation method thereof.
Background technology
In recent years, the application development of magnesium alloy in communication, electronics and transportation is rapid, but the crystalline structure of magnesium alloy close-packed hexagonal has determined that its plastic deformation ability is relatively poor, and the processing characteristics that improves magnesium alloy seems very important.Facts have proved that tiny equiaxial grain structure can improve the plastic deformation ability of magnesium alloy.Therefore, refinement magnesium alloy crystal grain is the key that improves its processing characteristics and improve its quality.Document " metallurgy and material transactions (Metallurgical andMaterials Transactions; 2000; 31A:2895) " crystal fining method of magnesium alloy is studied and summarized, the main at present crystal grain that adopts following method to come the refinement magnesium alloy is proposed: 1) Overheating Treatment, be about to magnesium alloy and be heated to the above 150-260 of liquidus temperature ℃ of maintenance certain hour, be cooled to teeming temperature then rapidly and pour into a mould; 2) melt stirs; 3) add other alloying element, as zirconium, aluminium and silicon etc.; 4) in aluminiferous magnesium alloy fused mass, feed carbonaceous gas or adding carbonaceous material.Yet above method exists problems such as treatment temp height, efficiency time weak point and technology inconvenience respectively; In addition, the aluminum element in zirconium and the magnesium alloy reacts, and refining effect was lost efficacy, and therefore, it is inapplicable to the most of magnesium alloy outside the Mg-Zn-(Y); In magnesium alloy, feed carbonaceous gas or add carbonaceous material when needing to contain in the alloy aluminium more than 0.5%, just can play effective refining effect.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned technology, providing a kind of can carry out efficient refinement and fining agent used for magnesium alloy easy to use and preparation method thereof to magnesium alloy.
The present invention realizes in the following manner:
A kind of fining agent used for magnesium alloy, its chemical ingredients (mass percent) is: aluminium 72.50-99.80%; Carbon 0.02-20.00%, magnesium 0.00-10.00%.
The preparation method of above-mentioned fining agent may further comprise the steps:
(1) is ready to pure aluminium powder, Graphite Powder 99 and magnesium powder by the mentioned component formation;
(2) three kinds of powders are evenly mixed with ball mill, and oven dry;
(3) with press device powder compression is become block;
(4) briquetting is placed resistance furnace or other heating installation of vacuum or protection of inert gas, be warming up to 700-1000 ℃, soaking time is no less than 25 minutes, stops heating then, and furnace cooling promptly obtains the fining agent product.
The particle diameter of each component is in above-mentioned preparation method's step (1): aluminium powder is not more than 100 microns, and Graphite Powder 99 is not more than 50 microns, and the magnesium powder is not more than 150 microns; Bake out temperature in the step (2) is 50-200 ℃, and drying time is 15-60 minute.
Present method gained fining agent is a bulk product, and its organization internal contains a large amount of tiny granular carbonization aluminium.After in joining magnesium alloy fused mass, aluminium carbide plays the effect of the heterogeneous nucleus of magnesium crystal grain, thus the crystal grain of refinement magnesium alloy.Product adding technology of the present invention is easy, and addition and thinning effect are easy to control, adds the purpose that can reach efficient refinement with trace.Be not subject to the influence of processing condition and treatment temp during simultaneously with the refinement of this fining agent, the effect hold-time can be more than 4 hours.
Embodiment
Provide three most preferred embodiments of the present invention below:
Embodiment one:
(1) takes by weighing aluminium powder, Graphite Powder 99 and magnesium powder 1kg altogether at 92: 5: 3 by mass ratio;
(2) after oven dry under 80 ℃ of temperature, mix 40 minutes with ball mill;
(3) be pressed into 30 millimeters of diameters with pressing machine, the right cylinder that length is 50 millimeters places the resistance furnace of argon shield, leaves certain interval between the block;
(4) furnace temperature is risen to 850 ℃ fast, be incubated and turn off power supply after 150 minutes, make it, can get the magnesium alloy refiner that composition is a carbon containing 5% with the stove naturally cooling.
Embodiment two:
Take by weighing aluminium powder and Graphite Powder 99 at 97: 3 by mass ratio, press embodiment one method and mix, oven dry, clamp dog is incubated in the resistance furnace of argon shield, and holding temperature is 800 ℃, and soaking time is 180 minutes, can get the magnesium alloy refiner of carbon containing 3% like this.
Embodiment three:
Take by weighing aluminium powder, Graphite Powder 99 and magnesium powder at 82.5: 12.5: 5 by mass ratio, the method for pressing embodiment is mixed, oven dry, clamp dog; in the resistance furnace of argon shield, be incubated; holding temperature changes 92 ℃, and soaking time is 180 minutes, can get the magnesium alloy refiner of carbon containing 12% like this.
Claims (3)
1. a fining agent used for magnesium alloy is characterized in that, chemical ingredients (mass percent) is: aluminium 72.50-99.80%, carbon 0.02-20.00%, magnesium 0.00-10.00%.
2. the preparation method of above-mentioned fining agent used for magnesium alloy is characterized in that may further comprise the steps:
(1) is ready to aluminium powder, Graphite Powder 99 and magnesium powder by the described proportioning of claim 1;
(2), oven dry mixed evenly, and briquetting with ball mill;
(3) briquetting is placed the process furnace of vacuum or protection of inert gas, be warming up to 700-1000 ℃, after soaking time is no less than 25 minutes, stop heating, furnace cooling promptly obtains the fining agent product.
3. the preparation method of fining agent used for magnesium alloy according to claim 2 is characterized in that: the particle diameter of aluminium powder is not more than 100 microns in the step (1), and the particle diameter of Graphite Powder 99 is not more than 50 microns; The particle diameter of magnesium powder is not more than 150 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021359210A CN1151293C (en) | 2002-11-25 | 2002-11-25 | Fining agent used for magnesium alloy and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021359210A CN1151293C (en) | 2002-11-25 | 2002-11-25 | Fining agent used for magnesium alloy and its preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1410566A true CN1410566A (en) | 2003-04-16 |
| CN1151293C CN1151293C (en) | 2004-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021359210A Expired - Fee Related CN1151293C (en) | 2002-11-25 | 2002-11-25 | Fining agent used for magnesium alloy and its preparation method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886196A (en) * | 2010-06-25 | 2010-11-17 | 东北大学 | Grain refiner for magnesium alloy and preparation method thereof |
| 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 |
| CN102534311A (en) * | 2011-12-20 | 2012-07-04 | 暨南大学 | Aluminium calcium carbon grain refiner for Mg-Al series magnesium alloy and preparation method and application thereof |
| EP2481822A1 (en) * | 2011-02-01 | 2012-08-01 | Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung GmbH | Magnesium-aluminum based alloy with grain refiner |
| CN108048677A (en) * | 2017-11-28 | 2018-05-18 | 仝仲盛 | The production method of the magnesium alloy of crystal grain refinement |
| CN112921225A (en) * | 2021-02-16 | 2021-06-08 | 河南工学院 | Aluminum-coated nano Al for Mg-Al alloy4C3Granular grain refiner and preparation method thereof |
-
2002
- 2002-11-25 CN CNB021359210A patent/CN1151293C/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886196B (en) * | 2010-06-25 | 2011-10-05 | 东北大学 | Grain refiner for magnesium alloy and preparation method thereof |
| CN101886196A (en) * | 2010-06-25 | 2010-11-17 | 东北大学 | Grain refiner for magnesium alloy and preparation method thereof |
| EP2481822A1 (en) * | 2011-02-01 | 2012-08-01 | Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung GmbH | Magnesium-aluminum based alloy with grain refiner |
| 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 |
| 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 |
| 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 |
| CN102146530B (en) * | 2011-03-15 | 2012-04-18 | 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 |
| 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 |
| GB2494354A (en) * | 2011-03-15 | 2013-03-06 | Shenzhen Sunxing Light Alloys Materials Co Ltd | Preparation method of Al-Zr-C master alloy |
| 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 |
| 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 |
| CN102534311A (en) * | 2011-12-20 | 2012-07-04 | 暨南大学 | Aluminium calcium carbon grain refiner for Mg-Al series magnesium alloy and preparation method and application thereof |
| CN108048677A (en) * | 2017-11-28 | 2018-05-18 | 仝仲盛 | The production method of the magnesium alloy of crystal grain refinement |
| CN112921225A (en) * | 2021-02-16 | 2021-06-08 | 河南工学院 | Aluminum-coated nano Al for Mg-Al alloy4C3Granular grain refiner and preparation method thereof |
| CN112921225B (en) * | 2021-02-16 | 2022-06-21 | 河南工学院 | Aluminum-coated nano Al for Mg-Al alloy4C3Granular grain refiner and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1151293C (en) | 2004-05-26 |
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