CN1563457A - Covering flux of vitrous body of magnesium alloy and manufacturing method - Google Patents
Covering flux of vitrous body of magnesium alloy and manufacturing method Download PDFInfo
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- CN1563457A CN1563457A CN 200410017363 CN200410017363A CN1563457A CN 1563457 A CN1563457 A CN 1563457A CN 200410017363 CN200410017363 CN 200410017363 CN 200410017363 A CN200410017363 A CN 200410017363A CN 1563457 A CN1563457 A CN 1563457A
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- magnesium
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Abstract
This invention provided a Mg alloy glass covering flux and its production method. The mass percentage sphere of the flux chemical composition is: MgCl 45-65%, KCL10-22%, NaCl10-22%, CaCl2 2-10%, CaF3-10%, MgO2-8%, cryolite: 2-6%, glass agent 0.5-5%, among which, the glass agent is boric oxide/or sodium borate. The flux is in glass state under high temperature and no crack appears in the stirred solution in the Mg melt so that it increase the protection effect for over 3.5 hours.
Description
Technical field
What the present invention relates to is a kind of magnesium alloy vitreum covering flux and production method thereof, produce be in a kind of use vitreum and action time very long magnesium alloy covering flux, to prevent oxidation and the burning in the magnesium alloy smelting process.Belong to metallic substance and metallurgical class field.
Background technology
Magnesium alloy is a structural metallic materials the lightest in the practical application, has that density is little, specific tenacity specific rigidity height, vibration damping is good, the electromagnetic shielding ability strong and be easy to performance characteristics such as recovery.Since the nineties in 20th century, each industrially developed country pays much attention to Mg Alloy Research and exploitation, and magnesium alloy has been widely used in fields such as defence and military, aerospace, automobile and electronics and information industry, and very vast market prospect is arranged.
But the chemically reactive of magnesium alloy is very strong, easy oxidizing fire in air, and the oxide film that generates loosens the unable to get up provide protection.Under high-temperature condition, the oxidizing reaction liberated heat then is easy to burning if can not in time distribute especially.Therefore, must take anti-oxidation, incendiary measure in the magnesium alloy smelting process.As adopt covering flux or protective gas, and starvation contacts with magnesium liquid, and this is different with general aluminum alloy melting technology.
Generally use RJ series flux [as document " non-ferrous casting alloy and melting " in producing at present, (publish May nineteen eighty-three for Lu Shusun etc., National Defense Industry Press, P195-199) described in], RJ series flux is that main some fluorochemicals of interpolation, muriate are formed by anhydrous carnallite.The density of this flux is bigger than liquid magnesium alloy, can sink gradually in the use, needs constantly to add flux to keep the protection effect, so the consumption of flux is big.On the other hand, this flux covering effect is not lasting, and the protection effect is not good yet, and guard time is very short, about 1 hour.Along with the prolongation of time, surperficial flux layer " wears out ", wide 2-3mm crackle different in size can occur on the liquid level sometimes, causes the magnesium melt liquid level to expose out, and oxidizing fire takes place.In actual production and the research; the magnesium melt needs to be heated to 760-800 ℃ high temperature sometimes; if not well protection; air-breathing and the oxidation especially severe of the magnesium melt of this moment; even violent burning; and the protection effect extreme difference of the RJ that generally uses at present series flux under 760-800 ℃ high temperature can't satisfy the protection requirement.In addition, RJ series flux slaggability is low, and poor with the separation property of magnesium melt, easily entrains into the interior flux that forms of magnesium melt and is mingled with.
In sum, be an instant task that enlarges Mg alloy castings production and improve the quality for improving the protection effect in the magnesium alloy smelting process, studying a kind of novel magnesium alloy covering flux that coverage effect is good, slaggability is strong.
Summary of the invention
The objective of the invention is to overcome the weak point of existing magnesium alloy covering agent, propose a kind ofly in the Metal Melting process, can form complete tight tectum, inclusion in the magnesium melt there is stronger adsorptive power, and is easy to the novel magnesium alloy vitreum covering flux with the magnesium melt extraction.This flux is vitreous state and is suspended in magnesium liquid surface under the high temperature action of magnesium melt, guard time is permanent, and is difficult for sneaking into alloy liquid and forms flux and be mingled with.
For achieving this end, the chemical constitution of magnesium alloy flux provided by the invention has been done bigger adjustment on the basis of existing flux, and has added slag former and vitrifying agent.Its composition quality percentage range is: the vitrifying agent of 45-65% magnesium chloride, 10-22% Repone K, 10-22% sodium-chlor, 2-10% calcium chloride, 3-10% Calcium Fluoride (Fluorspan), 2-8% magnesium oxide, 2-6% slag former sodium aluminum fluoride, 0.5-5%, vitrifying agent wherein is: boron oxide and/or Sodium Tetraborate.
The production method of magnesium alloy vitreum covering flux of the present invention is: after crucible is warmed up to certain temperature, add magnesium chloride, Repone K, sodium-chlor, calcium chloride, magnesium oxide and sodium aluminum fluoride, after being warmed up to partial melting, add Calcium Fluoride (Fluorspan) and vitrifying agent boride, be warmed up to 750-790 ℃, stir, pour into piece.The ball mill milling powdering of packing into after the fragmentation sieves with 20-40 number sieve.The flux for preparing should be packed into standby in the encloses container.
Use technology of the present invention is: add pure magnesium or magnesium alloy ingot in smelting furnace, adopt the covering flux of 2-3%, be sprinkled into earlier a small amount of insulating covering agent in stove, temperature is higher than after 500 ℃ in the stove, insulating covering agent melts gradually, and flux spreads out on the magnesium ingot surface, and oxidizing fire does not take place magnesium ingot.The magnesium ingot temperature continues to raise and progressively fusing, after magnesium ingot melts fully, continues to spread insulating covering agent on magnesium liquid surface, and insulating covering agent covers magnesium liquid surface secluding air rapidly at foaming of magnesium liquid surface melting and drawout, and magnesium liquid surface does not produce oxidizing fire.
Magnesium alloy vitreum covering flux provided by the invention has significant advantage, and the vitrifying agent boride that adds in the flux changes slag phase physicochemical property to some extent, and this flux at high temperature becomes vitreous state.In the use, vitreum flux of the present invention can crackle not occur as common inorganic mixing salt flux under the liquid disturbance of magnesium melt inside, strengthened the protection effect, has prolonged guard time, and the protection effect continues more than 3.5 hours.In addition, vitreum flux of the present invention can adsorb with dissolved oxygen and be mingled with, and the hydrogen in the melt is had very strong absorption and hold facility, makes that oxide inclusion and pore obviously reduce in the alloy structure.Flux of the present invention has appropriate melting point, density, viscosity and surface tension, and slaggability is strong, and the difficult flux that produces is mingled with.
Embodiment
Below by specific embodiment technical scheme of the present invention is further described.
Embodiment 1:
Magnesium alloy vitreum covering flux composition (mass percent): 65% magnesium chloride (MgCl
2), 10% Repone K (KCl), 10% sodium-chlor (NaCl), 3% calcium chloride (CaCl
2), 3% Calcium Fluoride (Fluorspan) (CaF
2), 2% magnesium oxide (MgO), 6% sodium aluminum fluoride (Na
3AlF
6), 1% boron oxide (B
2O
3).
The production method of this magnesium alloy vitreum covering flux is: after crucible is warmed up to about 350 ℃, add magnesium chloride, Repone K, sodium-chlor, calcium chloride, magnesium oxide and sodium aluminum fluoride, after being warmed up to partial melting, add Calcium Fluoride (Fluorspan) and boron oxide, be warmed up to about 770 ℃, stir, pour into piece.The ball mill milling powdering of packing into after the fragmentation sieves with No. 20 sieves.The flux for preparing should be packed into standby in the encloses container.
During use, in industrial magnesium smelting furnace, add pure magnesium or magnesium alloy, adopt 2% insulating covering agent, be sprinkled into earlier a small amount of insulating covering agent in stove, temperature is higher than after 500 ℃ in the stove, and insulating covering agent melts gradually, flux spreads out on the magnesium ingot surface, and oxidizing fire does not take place magnesium ingot.The magnesium ingot temperature continues to raise and progressively fusing, after magnesium ingot melts fully, continues to spread insulating covering agent on magnesium liquid surface; insulating covering agent is rapidly at magnesium liquid surface melting and drawout; cover magnesium liquid surface secluding air, magnesium liquid surface does not produce oxidizing fire, and this protection effect continues more than 4 hours.
Embodiment 2:
Magnesium alloy vitreum covering flux composition (mass percent): 50% magnesium chloride (MgCl
2), 20% Repone K (KCl), 10% sodium-chlor (NaCl), 2% calcium chloride (CaCl
2), 9% Calcium Fluoride (Fluorspan) (CaF
2), 2% magnesium oxide (MgO), 2% sodium aluminum fluoride (Na
3AlF
6), 5% Sodium Tetraborate (Na
2B
4O
7).
The production method of this magnesium alloy vitreum covering flux is: after crucible is warmed up to about 350 ℃, add magnesium chloride, Repone K, sodium-chlor, calcium chloride, magnesium oxide and sodium aluminum fluoride, after being warmed up to partial melting, add Calcium Fluoride (Fluorspan) and Sodium Tetraborate, be warmed up to about 790 ℃, stir, pour into piece.The ball mill milling powdering of packing into after the fragmentation sieves with No. 30 sieves.The flux for preparing should be packed into standby in the encloses container.
During use, in industrial magnesium smelting furnace, add pure magnesium or magnesium alloy, adopt 2.5% insulating covering agent, be sprinkled into earlier a small amount of insulating covering agent in stove, temperature is higher than after 500 ℃ in the stove, and insulating covering agent melts gradually, flux spreads out on the magnesium ingot surface, and oxidizing fire does not take place magnesium ingot.The magnesium ingot temperature continues to raise and progressively fusing, after magnesium ingot melts fully, continues to spread insulating covering agent on magnesium liquid surface; insulating covering agent is rapidly at magnesium liquid surface melting and drawout; cover magnesium liquid surface secluding air, magnesium liquid surface does not produce oxidizing fire, and this protection effect continues more than 3.5 hours.
Embodiment 3:
Magnesium alloy vitreum covering flux composition (mass percent): 45% magnesium chloride (MgCl
2), 10% Repone K (KCl), 20% sodium-chlor (NaCl), 10% calcium chloride (CaCl
2), 3% Calcium Fluoride (Fluorspan) (CaF
2), 8% magnesium oxide (MgO), 2% sodium aluminum fluoride (Na
3AlF
6), 1% boron oxide (B
2O
3), 1% Sodium Tetraborate (Na
2B
4O
7).
The production method of this magnesium alloy vitreum covering flux is: after crucible is warmed up to about 360 ℃, add magnesium chloride, Repone K, sodium-chlor, calcium chloride, magnesium oxide and sodium aluminum fluoride, after being warmed up to partial melting, add Calcium Fluoride (Fluorspan), boron oxide and Sodium Tetraborate, be warmed up to about 780 ℃, stir, pour into piece.The ball mill milling powdering of packing into after the fragmentation sieves with No. 40 sieves.The flux for preparing should be packed into standby in the encloses container.
During use, in industrial magnesium smelting furnace, add pure magnesium or magnesium alloy, adopt 3% insulating covering agent, be sprinkled into earlier a small amount of insulating covering agent in stove, temperature is higher than after 500 ℃ in the stove, and insulating covering agent melts gradually, flux spreads out on the magnesium ingot surface, and oxidizing fire does not take place magnesium ingot.The magnesium ingot temperature continues to raise and progressively fusing, after magnesium ingot melts fully, continues to spread insulating covering agent on magnesium liquid surface; insulating covering agent is rapidly at magnesium liquid surface melting and drawout; cover magnesium liquid surface secluding air, magnesium liquid surface does not produce oxidizing fire, and this protection effect continues more than 4.5 hours.
Claims (2)
1, a kind of magnesium alloy vitreum covering flux, it is characterized in that the composition quality percentage range is: the vitrifying agent of 45-65% magnesium chloride, 10-22% Repone K, 10-22% sodium-chlor, 2-10% calcium chloride, 3-10% Calcium Fluoride (Fluorspan), 2-8% magnesium oxide, 2-6% sodium aluminum fluoride, 0.5-5%, wherein vitrifying agent is: boron oxide and/or Sodium Tetraborate.
2, a kind of production method of magnesium alloy vitreum covering flux of claim 1, it is characterized in that after the crucible intensification, add magnesium chloride, Repone K, sodium-chlor, calcium chloride, magnesium oxide and sodium aluminum fluoride, be warmed up to partial melting after, add Calcium Fluoride (Fluorspan) and vitrifying agent boride, be warmed up to 750-790 ℃, stir, pour into piece, the ball mill milling powdering of packing into after the fragmentation, sieve, standby in the encloses container of packing into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410017363 CN1236088C (en) | 2004-04-01 | 2004-04-01 | Covering flux of vitrous body of magnesium alloy and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410017363 CN1236088C (en) | 2004-04-01 | 2004-04-01 | Covering flux of vitrous body of magnesium alloy and manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1563457A true CN1563457A (en) | 2005-01-12 |
| CN1236088C CN1236088C (en) | 2006-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410017363 Expired - Fee Related CN1236088C (en) | 2004-04-01 | 2004-04-01 | Covering flux of vitrous body of magnesium alloy and manufacturing method |
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| Country | Link |
|---|---|
| CN (1) | CN1236088C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462148B (en) * | 2007-12-19 | 2012-05-30 | 鸿富锦精密工业（深圳）有限公司 | Alloy-processing tool and coating agent thereof |
| CN102899516A (en) * | 2012-11-08 | 2013-01-30 | 石嘴山市学礼工贸有限公司 | Zero-emission recycling technology for refined waste residues of magnesium alloys |
| CN103468976A (en) * | 2013-10-12 | 2013-12-25 | 青海三工镁业有限公司 | No-pollution green environment-friendly fluxing agent for magnesium and magnesium alloy and preparation method thereof |
| CN104561633A (en) * | 2015-02-08 | 2015-04-29 | 东北大学 | Magnesium alloy and preparation method thereof |
| CN104561634A (en) * | 2015-02-08 | 2015-04-29 | 东北大学 | Refiner for magnesium and magnesium alloy and preparation method thereof |
| CN105349816A (en) * | 2015-11-30 | 2016-02-24 | 贵州航天风华精密设备有限公司 | Magnesium alloy smelting protection solvent and preparation method thereof |
| CN109811290A (en) * | 2019-04-10 | 2019-05-28 | 无锡天德金属制品有限公司 | A kind of surface treatment method of hot-dip steel |
| CN113976841A (en) * | 2021-12-24 | 2022-01-28 | 河北钢研德凯科技有限公司北京分公司 | Protective agent for magnesium alloy melt pouring, magnesium alloy casting and preparation method thereof |
-
2004
- 2004-04-01 CN CN 200410017363 patent/CN1236088C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462148B (en) * | 2007-12-19 | 2012-05-30 | 鸿富锦精密工业（深圳）有限公司 | Alloy-processing tool and coating agent thereof |
| CN102899516A (en) * | 2012-11-08 | 2013-01-30 | 石嘴山市学礼工贸有限公司 | Zero-emission recycling technology for refined waste residues of magnesium alloys |
| CN103468976A (en) * | 2013-10-12 | 2013-12-25 | 青海三工镁业有限公司 | No-pollution green environment-friendly fluxing agent for magnesium and magnesium alloy and preparation method thereof |
| CN104561633A (en) * | 2015-02-08 | 2015-04-29 | 东北大学 | Magnesium alloy and preparation method thereof |
| CN104561634A (en) * | 2015-02-08 | 2015-04-29 | 东北大学 | Refiner for magnesium and magnesium alloy and preparation method thereof |
| CN105349816A (en) * | 2015-11-30 | 2016-02-24 | 贵州航天风华精密设备有限公司 | Magnesium alloy smelting protection solvent and preparation method thereof |
| CN109811290A (en) * | 2019-04-10 | 2019-05-28 | 无锡天德金属制品有限公司 | A kind of surface treatment method of hot-dip steel |
| CN113976841A (en) * | 2021-12-24 | 2022-01-28 | 河北钢研德凯科技有限公司北京分公司 | Protective agent for magnesium alloy melt pouring, magnesium alloy casting and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1236088C (en) | 2006-01-11 |
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Owner name: NATIONAL ENGINEERING RESEARCH CENTER OF LIGHT ALL Free format text: FORMER OWNER: SHANGHAI JIAOTONG UNIV. Effective date: 20081010 |
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Effective date of registration: 20081010 Address after: No. nine, Jing Jing Road, Songjiang hi tech park, Shanghai, 1501 Patentee after: Shanghai Light Alloy Net Forming National Engineering Research Center Co., Ltd. Address before: No. 800, Dongchuan Road, Shanghai, Minhang District Patentee before: Shanghai Jiao Tong University |
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Granted publication date: 20060111 Termination date: 20190401 |
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