CN1904101A - Flux for heat resistant magnesium alloy - Google Patents
Flux for heat resistant magnesium alloy Download PDFInfo
- Publication number
- CN1904101A CN1904101A CN 200610109367 CN200610109367A CN1904101A CN 1904101 A CN1904101 A CN 1904101A CN 200610109367 CN200610109367 CN 200610109367 CN 200610109367 A CN200610109367 A CN 200610109367A CN 1904101 A CN1904101 A CN 1904101A
- Authority
- CN
- China
- Prior art keywords
- flux
- magnesium alloy
- alloy
- caf
- kcl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 30
- 230000004907 flux Effects 0.000 title claims abstract description 25
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 239000011780 sodium chloride Substances 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 229910004261 CaF 2 Inorganic materials 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 239000003546 flue gas Substances 0.000 claims description 2
- 238000010907 mechanical stirring Methods 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 abstract description 5
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 abstract 1
- 239000001110 calcium chloride Substances 0.000 abstract 1
- 235000011148 calcium chloride Nutrition 0.000 abstract 1
- 229910001628 calcium chloride Inorganic materials 0.000 abstract 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 abstract 1
- 229910001634 calcium fluoride Inorganic materials 0.000 abstract 1
- 229910001610 cryolite Inorganic materials 0.000 abstract 1
- 239000001095 magnesium carbonate Substances 0.000 abstract 1
- 235000014380 magnesium carbonate Nutrition 0.000 abstract 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 abstract 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 description 24
- 229910045601 alloy Inorganic materials 0.000 description 23
- 238000005275 alloying Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 238000007670 refining Methods 0.000 description 7
- 239000000155 melt Substances 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000007499 fusion processing Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 238000010309 melting process Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000714 At alloy Inorganic materials 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 229910000753 refractory alloy Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a flux for heat-resistant magnesium alloy. It is used for melt protection in the course of smelting heat-resistant magnesium alloy. It is characterized by that its composition includes (by wt%) 5%-10% of NaCl, 5%-12% of CaF2, 5%-15% of Na3AlF6, 10%-20% of CaCl2, 0%-5% of MgCO3, 0%-3% of H3BO4 and the rest is Kcl.
Description
Technical field
The present invention relates to a kind of flux for heat resistant magnesium alloy, be applied to the melt protecting in the heat resistance magnesium alloy fusion process, the removal of impurities of melt, slag making.
Technical background
Magnesium is structural metallic materials the lightest in the practical application, and it is little to have density, specific tenacity specific rigidity height, and electrical and thermal conductivity performance is excellent, and characteristics such as good and returnability of electromagnetic wave shielding are considered to the desirable substitute products of plastics, iron and steel and aluminum alloy materials.
Heat resistance magnesium alloy is mainly used in national defense industry and aerospace field the earliest, and along with the requirement of automobile loss of weight, the application of car transmissions becomes the huge impellent of its broadened application in recent years.
Magnesium is a kind of very active metal, and very big with the avidity of oxygen, the compacting factor of its upper layer is less than 1 (0.74g/cm
3), therefore be easy to oxidized.Generally all contain calcium and rare earth element in the heat resistance magnesium alloy, smelting temperature is than the smelting temperature height of ordinary magnesium alloy, the easier oxidization burning loss that occurs in the fusion process, therefore when carrying out the melting of this type of alloy, flux not only will play oxidation, the burning that prevents alloy melt, and the inclusion in the alloy is played good removal of impurities, slagging-off effect, and also the alloying element calcium and the rare earth of Ying Buyu adding react simultaneously, reduce the oxidization burning loss of this type of alloying element, improve the casting yield of element.
Flux commonly used in the magnesium alloy smelting process is MgCl
2-KCl fused salt mixt system, the physicochemical property of this system can satisfy the requirement of magnesium and common alloy melting, but can not satisfy the requirement of heat resistance magnesium alloy, because of its main component MgCl
2Meeting and refractory alloy element react with greatly reduce the yield of alloying element.Though have at the rare earth element magnesium alloy smelting at present and do not contain MgCl
2The flux of the RJ-6 trade mark, but this trade mark flux contains the BaCl of 14～16 (mass) %
2Although, BaCl
2Be weighting agent preferably, but because of it has toxicity, harmful to environment.
Summary of the invention
The objective of the invention is to singularity at the heat resistance magnesium alloy melting; a kind of special-purpose flux is provided; make this flux in fusion process, not only can protect magnesium alloy fused mass not oxidized effectively; simultaneously can in refining process, have good wettability and adsorptive power to the inclusion in the melt; and certain difference in specific gravity is arranged with metal melt; can be well with Impurity removal; and do not react with the alloying element that adds; do not influence the casting yield of alloying element, in addition, it is extensive that this flux also will have raw material sources; preparation technology is simple; cheap, use this flux environmentally safe, do not increase the production cost of heat resistance magnesium alloy.
The objective of the invention is to be achieved through the following technical solutions.
A kind of flux for heat resistant magnesium alloy is characterized in that its weight percent consists of NaCl:5%～10%; CaF
2: 5%～12%; Na
3AlF
6: 5%～15%; CaCl
2: 10%～20%; MgCO
3: 0%～5%; H
3BO
4: 0%～3%, surplus is KCl.
The production method of flux of the present invention is: iron crucible is heated to 250～300 ℃, with KCl, NaCl, Na
3AlF
6, CaCl
2Mix in proportion and join in the crucible, treat that this mixture all after the fusing, is warmed up to 720～760 ℃, mechanical stirring is even, left standstill 10 minutes, flue gas not had overflows, and pours into piece, pulverize with pulverizer the cooling back, with the screening of 0.6～0.355mm sieve, the CaF of additional proportion
2Powder stirs, and packs respectively.
The special-purpose flux of the heat resistance magnesium alloy that the present invention proposes; has bigger surface tension; in the magnesium alloy melting process, can form continuous compact protective film at bath surface; make alloy melt and air and steam isolated; reduced the temperature adjustment oxidization burning loss of magnesium alloy and air-breathing; in refining process, the inclusion in the melt had stronger moistening adsorption; has certain difference in specific gravity with the magnesium melt; slaggability is strong; can remove metal and nonmetallic impurity in the alloy melt effectively; melt had good cleaning action; it is extensive that this flux also has raw material sources; production technique is simple, and low production cost uses this flux can not increase the characteristics of the production cost of heat resistance magnesium alloy.
Embodiment
A kind of flux for heat resistant magnesium alloy, its weight percent consists of NaCl:5%～10%; CaF
2: 5%～12%; Na
3AlF
6: 5%～15%; CaCl
2: 10%～20%; MgCO
3: 0%～5%; H
3BO
4: 0%～3%, surplus is KCl.
Below by specific examples technical scheme of the present invention is described further.
Embodiment 1
Heat resistance magnesium alloy insulating covering agent component and mass percent: KCl:55%; NaCl:10%; CaF
2: 5%; Na
3AlF
6: 5%, CaCl
2: 20%; MgCO
3: 5%.
Preparation technology: iron crucible is warmed up to about 300 ℃, with the KCl that weighs up in advance and mix; NaCl; CaF
2Na
3AlF
6CaCl
2, add crucible, continue to heat up, thing to be mixed all after the fusing, is warming up to 740～750 ℃, stirs, and leaves standstill about 10 minutes, makes to no longer include tangible gas in the melt and overflow, and pours into piece.Pulverize with pulverizer, sieve, add powdery CaF respectively with 0.6mm
2, mix, pack respectively.
During the melting heat resistance magnesium alloy, treat that crucible is warmed up to 200～250 ℃, % is placed on crucible bottom with lump stone 2%～5 (wt), adds main alloying element, and the powder flux of sealing is added 3%MgCO
3Mix, be sprinkling upon alloy surface by about 2%～3%, prevent alloy oxidation in melting process, wait upon the alloy running down after, add this flux, make alloy surface form the continuous compact protective film of one deck.This protective membrane can protect magnesium alloy not oxidized in fusion process effectively.
Embodiment 2
Heat resistance magnesium alloy refining agent component and mass percent: KCl:50%; NaCl:10%; CaF
2: 10%; NaAlF
6: 15%; CaCl
2: 15%.
Preparation technology: iron crucible is warmed up to about 300 ℃, with the KCl that weighs up in advance and mix; NaCl; CaF
2NaAlF
6CaCl
2, add crucible, continue to heat up, thing to be mixed all after the fusing, is warming up to 740～750 ℃, stirs, and leaves standstill about 10 minutes, makes to no longer include tangible gas in the melt and overflow, and pours into piece.Pulverize with pulverizer, sieve, add powdery CaF with 0.355mm
2, mix, pack.
During the melting heat resistance magnesium alloy; in melting process, at first protect by 1 pair of alloy of example; prevent the oxidizing fire of alloy in melting process; after alloy principal element and the whole fusings of alloying element; be warmed up to about 740～750 ℃; alloy is carried out refining treatment; in refining process; along with the carrying out that stirs; to constantly this flux evenly be sprayed alloy liquid surface; after the refining 15～20 minutes, stop to stir, sprinkle in the process that insulating covering agent protection alloy leaving standstill not oxidized at alloy surface.After leaving standstill 20～30 minutes, slag can separate well with alloy.
Embodiment 3
Heat resistance magnesium alloy insulating covering agent component and mass percent: KCl::47%; NaCl::10%; CaF
2: 5%; NaAlF
6: 15%, CaCl
2: 20%; H
3BO
4: 3%.
Preparation technology: iron crucible is warmed up to about 300 ℃, with the KCl that weighs up in advance and mix; NaCl; CaF
2NaAlF
6CaCl
2, add crucible, continue to heat up, thing to be mixed all after the fusing, is warming up to 740～750 ℃, stirs, and leaves standstill about 10 minutes, makes to no longer include tangible gas in the melt and overflow, and pours into piece.Pulverize with pulverizer, sieve, add powdery CaF with 0.355mm
2, mix, pack.
In the melting heat resistance magnesium alloy process, by example 1 and 2 pairs of alloys of example melt with refining treatment after, leave standstill to cool to about 710 ℃ and cast, in casting cycle, for preventing alloy oxidation appears, powder flux that this example is made and 3% H
3BO
4Mix, the ratio in about 1% evenly is sprinkling upon alloy surface, can protect alloy surface not oxidized effectively, oxidization burning loss can not occur in whole casting cycle; The flux good fluidity of alloy surface separates with alloy easily simultaneously.
Claims (2)
1. a flux for heat resistant magnesium alloy is characterized in that its weight percent consists of NaCl:5%～10%; CaF
2: 5%～12%; Na
3AlF
6: 5%～15%; CaCl
2: 10%～20%; MgCO
3: 0%～5%; H
3BO
4: 0%～3%, surplus is KCl.
2. the preparation method of a flux for heat resistant magnesium alloy is characterized in that its preparation process for iron crucible is heated to 250～300 ℃, with KCl, NaCl, Na
3AlF
6, CaCl
2Mix by design proportion and to join in the crucible, treat that this mixture all after the fusing, is warmed up to 720～760 ℃, mechanical stirring is even, left standstill 10 minutes, flue gas not had overflows, and pours into piece, pulverize with pulverizer the cooling back, with the screening of 0.6～0.355mm sieve, the CaF of additional proportion
2Powder stirs, and packs respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101093672A CN100398680C (en) | 2006-08-14 | 2006-08-14 | Flux for heat resistant magnesium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101093672A CN100398680C (en) | 2006-08-14 | 2006-08-14 | Flux for heat resistant magnesium alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1904101A true CN1904101A (en) | 2007-01-31 |
| CN100398680C CN100398680C (en) | 2008-07-02 |
Family
ID=37673465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101093672A Active CN100398680C (en) | 2006-08-14 | 2006-08-14 | Flux for heat resistant magnesium alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100398680C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250636B (en) * | 2008-03-27 | 2010-06-02 | 武汉英立科技研究所 | Nonferrous alloy smelting fusing agent and preparation method |
| CN102312116A (en) * | 2011-10-09 | 2012-01-11 | 无锡隆达金属材料有限公司 | Solvent for anti-vacuum casting of chromium zircomium copper |
| CN101817066B (en) * | 2010-05-14 | 2013-02-13 | 大连理工大学 | Covering agent for smelting copper alloy |
| CN115354183A (en) * | 2022-08-26 | 2022-11-18 | 南昌大学 | Gadolinium-magnesium intermediate alloy purifying flux |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1632711A1 (en) * | 1988-07-29 | 1991-03-07 | Ташкентский Политехнический Институт Им.А.Р.Бируни | Flux for welding magnesium alloys |
| CN1164777C (en) * | 2001-12-11 | 2004-09-01 | 上海交通大学 | Refining agent of Mg alloy and its preparing process |
| CN1142301C (en) * | 2002-07-25 | 2004-03-17 | 上海交通大学 | Flux for removing iron from Mg alloy and its preparing process |
| CN1216170C (en) * | 2003-04-18 | 2005-08-24 | 中南大学 | Fluxing agent for refining magnesium alloy containing rare-earth |
| CN1277940C (en) * | 2004-03-18 | 2006-10-04 | 上海交通大学 | Melting agent for refining alloy in rare earth class and fabrication method |
| CN1208481C (en) * | 2004-05-13 | 2005-06-29 | 上海交通大学 | Magnesium and magnesium alloy composite protection fire-proof covering flux and its production method |
| CN1276106C (en) * | 2004-10-10 | 2006-09-20 | 中国铝业股份有限公司 | Recovering method for waste magnesium alloy |
-
2006
- 2006-08-14 CN CNB2006101093672A patent/CN100398680C/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250636B (en) * | 2008-03-27 | 2010-06-02 | 武汉英立科技研究所 | Nonferrous alloy smelting fusing agent and preparation method |
| CN101817066B (en) * | 2010-05-14 | 2013-02-13 | 大连理工大学 | Covering agent for smelting copper alloy |
| CN102312116A (en) * | 2011-10-09 | 2012-01-11 | 无锡隆达金属材料有限公司 | Solvent for anti-vacuum casting of chromium zircomium copper |
| CN115354183A (en) * | 2022-08-26 | 2022-11-18 | 南昌大学 | Gadolinium-magnesium intermediate alloy purifying flux |
| CN115354183B (en) * | 2022-08-26 | 2023-06-27 | 南昌大学 | Gadolinium magnesium intermediate alloy purifying flux |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100398680C (en) | 2008-07-02 |
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| C14 | Grant of patent or utility model | ||
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