CN105779797A - Magnesium alloy casting technology - Google Patents
Magnesium alloy casting technology Download PDFInfo
- Publication number
- CN105779797A CN105779797A CN201610153838.3A CN201610153838A CN105779797A CN 105779797 A CN105779797 A CN 105779797A CN 201610153838 A CN201610153838 A CN 201610153838A CN 105779797 A CN105779797 A CN 105779797A
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- casting
- alloy
- crucible
- magnesium alloy
- fabrication technique
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a magnesium alloy casting technology. The volume ratio of mixed gas of N2, CO2 and SF6 is 5:4.7:0.3, the casting cost can be reduced, and economic benefits can be improved. The adding amount of CaO is 0.5%, the solid solution and aging state structure of an alloy can be effectively improved, grains are refined, an Al2Ca phase and a Mg2Ca phase are generated, and the corrosion resistant performance of the alloy is improved. In the smelting process, ultrasonic vibration is adopted for conducting auxiliary stirring all the time, and the alloy can be fully and evenly mixed. A covering agent and a refining agent are mixtures of MgCl2, KCl, BaCl2 and CaF2, the mass fraction ratio is 2:2:3:1, and inclusions in the alloy can be reduced. After refinement, S and H2Bo3 at the ratio of 1:1 are added, and the alloy can be prevented from burning after being refined. The magnesium alloy cast through the technology has the beneficial effects of being resistant to corrosion and small in inclusion content, the market potential is huge, and prospects are wide.
Description
Technical field
The invention belongs to casting field, it is more particularly related to a kind of casting of magnesium alloy fabrication technique.
Background technology
Magnesium alloy is the lightest structural timber, have that density is little, specific stiffness and specific strength is high, electromagnetic wave shielding is good, damping characteristics is high, heat-conductivity conducting is good, good casting character, the advantage such as easily processed into type and waste material easily recovery, make its application in fields such as automobile, electronics, household electrical appliances and Aero-Space increasing.Magnesium alloy is described as " 21 century green engineering metal ", and its research is put into more and more by each economic giant in recent years, and this field has become as the focus of world research.Along with energy-conservation, reduce discharging, the development in automotive light weight technology epoch, increasing various parts begin with magnesium alloy materials to replace original iron and steel, aluminum, and in industrial circle, magnesium alloy will become following important light material and be widely used.
Summary of the invention
Problem to be solved by this invention is to provide a kind of casting of magnesium alloy fabrication technique.
To achieve these goals, the technical scheme that the present invention takes is:
A kind of casting of magnesium alloy fabrication technique, comprises the steps:
(1) instrument prepares
Being welded into crucible with low carbon steel plate, crucible weld seam through x-ray examination and kerosene leaking test, then need to wash with flux, stand-by after cleaning；
(2) metal processes
Metal used for casting is adopted blasting treatment, and puts into preheating wipe oil in decontamination pond；
(3) crucible preheating
Crucible electrified regulation 1～2h, making crucible temperature is 400 DEG C～500 DEG C, and sprinkles the coverture of 0.6%～0.8% in crucible bottom and sidewall of crucible, and described coverture is MgCl2、KCl、BaCl2、CaF2Mixture, mass fraction is than for 2:2:3:1；
(4) melting
Add the Na2BeF4 of magnesium ingot and 3%～5%, make it melt, and it is warming up to 740 DEG C～780 DEG C, CaO is put in melted molten metal, it is slowly added into preheated zinc, Mg-Zr intermediate alloy and rare earth metal more in batches, after alloy has all melted, and is sprinkled into the coverture of 0.5%～0.7%, stand 3～5min, fusion process adopts N2、CO2And SF6Mixing gas melt is protected；
(5) refine
Aluminium alloy temperature being adjusted to 750～760 DEG C, add the refining agent of 2.3%～2.5%, stir 4～8min, described refining agent is MgCl2、KCl、BaCl2、CaF2Mixture, mass fraction is than for 2:2:3:1；
(6) cast
With the solvent layer pushed open at the bottom of casting ladle on aluminium alloy surface, smoothly scoop aluminium alloy with wide mouth, pour out a little aluminium alloy in preheated standby mold from ladle spout；
(7) casting mold
In casting process, constantly should spread sulfur and mebor in flow surfaces and cup.
Preferably, described step (4) N2、CO2And SF6Mixing gas volume ratio be 5:4.7:0.3.
Preferably, it is characterised in that: the addition of described step (4) CaO is 0.4%～0.6%.
Preferably, described step (4) fusion process adopt supersonic vibration carry out auxiliary stirring always.
Preferably, described coverture and refining agent are MgCl2、KCl、BaCl2、CaF2Mixture, mass fraction is than for 2:2:3:1.
Preferably, S and the H of 1:1 is added after described step (5) refine3Bo3。
Beneficial effect: the invention discloses a kind of casting of magnesium alloy fabrication technique, described N2、CO2And SF6Mixing gas volume ratio be 5:4.7:0.3, it is possible to reduce casting cost, increase economic efficiency, the addition of described CaO is 0.5%, it is possible to is effectively improved alloy solid solution aging state tissue, crystal grain thinning, and generates Al2Ca phase and Mg2Ca phase, and improve the decay resistance of alloy, described fusion process adopt supersonic vibration carry out auxiliary stirring, it is possible to making alloy fully mix, described coverture and refining agent are MgCl always2、KCl、BaCl2、CaF2Mixture, mass fraction is than for 2:2:3:1, it is possible to reduce the field trash in alloy, adds S and the H of 1:1 after described refine3Bo3, it is possible to preventing alloy refine after-combustion, adopt the magnesium alloy of this kind of cast, have advantage corrosion-resistant, that inclusion content is few, market potential is huge, has a extensive future.
Detailed description of the invention
Embodiment 1:
A kind of casting of magnesium alloy fabrication technique, comprises the steps:
(1) instrument prepares
Being welded into crucible with low carbon steel plate, crucible weld seam through x-ray examination and kerosene leaking test, then need to wash with flux, stand-by after cleaning；
(2) metal processes
Metal used for casting is adopted blasting treatment, and puts into preheating wipe oil in decontamination pond；
(3) crucible preheating
Crucible electrified regulation 1h, making crucible temperature is 400 DEG C, and sprinkles the coverture of 0.6% in crucible bottom and sidewall of crucible；
(4) melting
Add the Na of magnesium ingot and 3%2BeF4So that it is melt, and be warming up to 740 DEG C, CaO by 0.4% puts in melted molten metal, then is slowly added into preheated zinc, Mg-Zr intermediate alloy and rare earth metal in batches, after alloy has all melted, and be sprinkled into 0.5% coverture, stand 3, in fusion process adopt N2、CO2And SF6Mixing gas melt is protected, described N2、CO2And SF6Mixing gas volume ratio be 5:4.7:0.3, in fusion process adopt supersonic vibration always carry out auxiliary stirring；
(5) refine
Aluminium alloy temperature is adjusted to 750, adds the refining agent of 2.3%, stir 4min；
(6) cast
With the solvent layer pushed open at the bottom of casting ladle on aluminium alloy surface, smoothly scoop aluminium alloy with wide mouth, pour out a little aluminium alloy in preheated standby mold from ladle spout；
(7) casting mold
In casting process, constantly should spread sulfur and mebor in flow surfaces and cup.
Embodiment 2:
A kind of casting of magnesium alloy fabrication technique, comprises the steps:
(1) instrument prepares
Being welded into crucible with low carbon steel plate, crucible weld seam through x-ray examination and kerosene leaking test, then need to wash with flux, stand-by after cleaning；
(2) metal processes
Metal used for casting is adopted blasting treatment, and puts into preheating wipe oil in decontamination pond；
(3) crucible preheating
Crucible electrified regulation 1.5h, making crucible temperature is 4500 DEG C, and sprinkles the coverture of 0.7% in crucible bottom and sidewall of crucible；
(4) melting
Add the Na of magnesium ingot and 4%2BeF4So that it is melt, and be warming up to 760 DEG C, CaO by 0.5% puts in melted molten metal, then is slowly added into preheated zinc, Mg-Zr intermediate alloy and rare earth metal in batches, after alloy has all melted, and be sprinkled into 0.6% coverture, stand 4min, in fusion process adopt N2、CO2And SF6Mixing gas melt is protected, described N2、CO2And SF6Mixing gas volume ratio be 5:4.7:0.3, in fusion process adopt supersonic vibration always carry out auxiliary stirring；
(5) refine
Aluminium alloy temperature is adjusted to 755 DEG C, add the refining agent of 2.4%, stir 6min；
(6) cast
With the solvent layer pushed open at the bottom of casting ladle on aluminium alloy surface, smoothly scoop aluminium alloy with wide mouth, pour out a little aluminium alloy in preheated standby mold from ladle spout；
(7) casting mold
In casting process, constantly should spread sulfur and mebor in flow surfaces and cup.
Embodiment 3:
A kind of casting of magnesium alloy fabrication technique, comprises the steps:
(1) instrument prepares
Being welded into crucible with low carbon steel plate, crucible weld seam through x-ray examination and kerosene leaking test, then need to wash with flux, stand-by after cleaning；
(2) metal processes
Metal used for casting is adopted blasting treatment, and puts into preheating wipe oil in decontamination pond；
(3) crucible preheating
Crucible electrified regulation 2h, making crucible temperature is 500 DEG C, and sprinkles the coverture of 0.8% in crucible bottom and sidewall of crucible；
(4) melting
Add the Na of magnesium ingot and 5%2BeF4So that it is melt, and be warming up to 780 DEG C, CaO by 0.6% puts in melted molten metal, then is slowly added into preheated zinc, Mg-Zr intermediate alloy and rare earth metal in batches, after alloy has all melted, and be sprinkled into 0.7% coverture, stand 5min, in fusion process adopt N2、CO2And SF6Mixing gas melt is protected, described N2、CO2And SF6Mixing gas volume ratio be 5:4.7:0.3, in fusion process adopt supersonic vibration always carry out auxiliary stirring；
(5) refine
Aluminium alloy temperature is adjusted to 760 DEG C, add the refining agent of 2.5%, stir 8min；
(6) cast
With the solvent layer pushed open at the bottom of casting ladle on aluminium alloy surface, smoothly scoop aluminium alloy with wide mouth, pour out a little aluminium alloy in preheated standby mold from ladle spout；
(7) casting mold
In casting process, constantly should spread sulfur and mebor in flow surfaces and cup.
After process above processes, taking out sample respectively, measurement result is as follows:
| Detection project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Prior art index |
| Corrosion resistance | Generally | Good | Good | Generally |
| Field trash | Many | Few | Few | Many |
| Stretch tensile strength | Generally | Good | Good | Generally |
Can draw according to above table data, the magnesium alloy that the magnesium alloy produced when embodiment 2 parameter produces than prior art corrosion-resistant, and it is few to have field trash, the advantage that tensile strength is big.
The invention discloses a kind of casting of magnesium alloy fabrication technique, described N2、CO2And SF6Mixing gas volume ratio be 5:4.7:0.3, it is possible to reduce casting cost, increase economic efficiency, the addition of described CaO is 0.5%, it is possible to is effectively improved alloy solid solution aging state tissue, crystal grain thinning, and generates Al2Ca phase and Mg2Ca phase, and improve the decay resistance of alloy, described fusion process adopt supersonic vibration carry out auxiliary stirring, it is possible to making alloy fully mix, described coverture and refining agent are MgCl always2、KCl、BaCl2、CaF2Mixture, mass fraction is than for 2:2:3:1, it is possible to reduce the field trash in alloy, adds S and the H of 1:1 after described refine3Bo3, it is possible to preventing alloy refine after-combustion, adopt the magnesium alloy of this kind of cast, have advantage corrosion-resistant, that inclusion content is few, market potential is huge, has a extensive future.
Claims (6)
1. a casting of magnesium alloy fabrication technique, it is characterised in that comprise the steps:
(1) instrument prepares
Being welded into crucible with low carbon steel plate, crucible weld seam through x-ray examination and kerosene leaking test, then need to wash with flux, stand-by after cleaning；
(2) metal processes
Metal used for casting is adopted blasting treatment, and puts into preheating wipe oil in decontamination pond；
(3) crucible preheating
Crucible electrified regulation 1～2h, making crucible temperature is 400 DEG C～500 DEG C, and sprinkles the coverture of 0.6%～0.8% in crucible bottom and sidewall of crucible；
(4) melting
Add the Na2BeF4 of magnesium ingot and 3%～5%, make it melt, and it is warming up to 740 DEG C～780 DEG C, CaO is put in melted molten metal, it is slowly added into preheated zinc, Mg-Zr intermediate alloy and rare earth metal more in batches, after alloy has all melted, and is sprinkled into the coverture of 0.5%～0.7%, stand 3～5min, fusion process adopts N2、CO2And SF6Mixing gas melt is protected；
(5) refine
Aluminium alloy temperature is adjusted to 750～760 DEG C, add the refining agent of 2.3%～2.5%, stir 4～8min；
(6) cast
With the solvent layer pushed open at the bottom of casting ladle on aluminium alloy surface, smoothly scoop aluminium alloy with wide mouth, pour out a little aluminium alloy in preheated standby mold from ladle spout；
(7) casting mold
In casting process, constantly should spread sulfur and mebor in flow surfaces and cup.
2. a kind of casting of magnesium alloy fabrication technique described in claim 1, it is characterised in that: described step (4) N2、CO2And SF6Mixing gas volume ratio be 5:4.7:0.3.
3. a kind of casting of magnesium alloy fabrication technique described in claim 1, it is characterised in that: the addition of described step (4) CaO is 0.4%～0.6%.
4. a kind of casting of magnesium alloy fabrication technique described in claim 1, it is characterised in that: described step (4) fusion process adopt supersonic vibration carry out auxiliary stirring always.
5. a kind of casting of magnesium alloy fabrication technique described in claim 1, it is characterised in that: described coverture and refining agent are MgCl2、KCl、BaCl2、CaF2Mixture, mass fraction is than for 2:2:3:1.
6. a kind of casting of magnesium alloy fabrication technique described in claim 1, it is characterised in that: add S and the H of 1:1 after described step (5) refine3Bo3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610153838.3A CN105779797A (en) | 2016-03-16 | 2016-03-16 | Magnesium alloy casting technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610153838.3A CN105779797A (en) | 2016-03-16 | 2016-03-16 | Magnesium alloy casting technology |
Publications (1)
| Publication Number | Publication Date |
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| CN105779797A true CN105779797A (en) | 2016-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610153838.3A Pending CN105779797A (en) | 2016-03-16 | 2016-03-16 | Magnesium alloy casting technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706334A (en) * | 2019-01-17 | 2019-05-03 | 太原理工大学 | Cast alumin(i)um dicalcium/magnesium dicalcium reinforced phase magnesium-based composite material preparation method in a kind of high-content |
| CN115386747A (en) * | 2022-08-02 | 2022-11-25 | 山西银光华盛镁业股份有限公司 | Method for preparing ZM5 and ZM6 magnesium alloy |
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| CN1587430A (en) * | 2004-08-12 | 2005-03-02 | 上海交通大学 | Deformed magnesium alloy and its casting and deforming processing process |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706334A (en) * | 2019-01-17 | 2019-05-03 | 太原理工大学 | Cast alumin(i)um dicalcium/magnesium dicalcium reinforced phase magnesium-based composite material preparation method in a kind of high-content |
| CN115386747A (en) * | 2022-08-02 | 2022-11-25 | 山西银光华盛镁业股份有限公司 | Method for preparing ZM5 and ZM6 magnesium alloy |
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