CN107838387A - The method that ultrasonic assistant prepares ZM5 Mg alloy castings - Google Patents
The method that ultrasonic assistant prepares ZM5 Mg alloy castings Download PDFInfo
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- CN107838387A CN107838387A CN201711218567.6A CN201711218567A CN107838387A CN 107838387 A CN107838387 A CN 107838387A CN 201711218567 A CN201711218567 A CN 201711218567A CN 107838387 A CN107838387 A CN 107838387A
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- alloy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
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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
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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
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a kind of ZM5 Mg alloy castings preparation methods based on ultrasonication technology, belong to metal molding field.The inventive method is specially：It is added to after simple metal Mg, Al, Zn and Mg 10%Mn alloys are prepared in Mg 8Al 0.35Zn 0.40Mn ratios in the stainless steel crucible of inner homogeneous brushing protective coating; heated in magnesium alloy well formula resistance furnace; after melting, refining, rotten, stewing process; when temperature is 700 DEG C; ultrasound is imported in ZM5 magnesium alloy fused mass; sonication treatment time is in 100s; sonification power is 600W; after processing terminates; it is quickly moved out ultrasonic device; and pour into the ZM5 magnesium alloy fused mass handled in sand mold, prepare casting.Technical scheme can effectively solve the defects of ZM5 Mg alloy castings segregation, loose, can prepare that crystal grain is more tiny in a short time, the more excellent casting of performance, open the new way of ZM5 alloy-steel castings preparation.
Description
Technical field
It is more particularly to a kind of that there is even tissue, tensile strength the invention belongs to ZM5 Mg alloy castings preparing technical fields
And the casting preparation method of the higher ZM5 magnesium alloys of elongation percentage.
Background technology
High-strength casting alloy in lightweight is the important feature material of the spacecrafts such as carrier rocket, spaceship and space station,
It is the key structure material of the armament systems such as guided missile, fighter plane, it is studied and application receives much concern.The as-cast structure of casting alloy
It is general thicker, and low-alloyed mechanical property can drop in the tissue of the form, limit its commercial Application.Crystal grain refinement is to improve
Cast alloy materials intensity and the optimal path for improving plasticity.
Ultrasonic field is introduced in metal bath, utilizes the unique ultrasonic cavitation of ultrasonic field and acoustic streaming effect and metal bath
Interaction, the microstructure of alloy can be significantly improved.For casting alloy, supersound process is a kind of very promising
The mode of refined crystalline strengthening.
Therefore, using the specific process of setting for importing equipment, high-power ultrasonics being applied to liquid metal, using conjunction
Suitable ultrasonic melt processing power, temperature and time, to thinning microstructure, improve performance.
The content of the invention
For in the prior art the defects of, it is an object of the invention to provide a kind of ultrasonic assistant to prepare the casting of ZM5 magnesium alloys
The method of part.
The present invention is achieved by the following technical solutions：
The invention provides a kind of method that ultrasonic assistant prepares ZM5 Mg alloy castings, it comprises the following steps：
S1：By the composition dispensing of simple metal and intermediate alloy Mg-8Al-0.35Zn-0.40Mn, and it is incubated and is fused into melt；
S2：The melt is refined, gone bad and stood, obtains aluminium alloy；
S3：After the aluminium alloy is ultrasonically treated, casting, coagulation forming, the ZM5 Mg alloy castings are obtained,
Wherein, the simple metal is pure magnesium, fine aluminium and pure zinc, and the intermediate alloy is containing magnesium-manganese intermediate alloy.
Preferably, before step S1 progress, the equipment surface contacted with aluminium alloy is coated into protection coating materials,
The protection coating materials include the following component of percentage：
Preferably, step S1 concrete operations are：
RJ-2 flux is added in crucible, addition is the 0.1~0.25% of furnace charge total amount, then adds the pure magnesium of drying
Enter in crucible, when pure magnesium melts and is warming up to 700~720 DEG C, add fine aluminium, temperature adds pure zinc at 710~730 DEG C
And magnesium-manganese alloy.
Preferably, the method for the refining described in step S2 is：
Refined using argon gas, blow head insertion melt bottom, to there is gentle boiling with liquid level, refining terminates rear thorough logical argon gas
Bottom removes surface slag, and control magnesium liquid constantly spreads JDMJ solvents on liquid level when seething, dosage for total melt weight 1.5~
2.0%, 750 DEG C of start temperature is refined, refining temperature is controlled at 740~750 DEG C.
Preferably, the rotten method described in step S2 is：
Alterant is added into melt, the dosage for controlling the alterant is the 0.3~0.5% of total melt weight, 740
Gone bad at~750 DEG C, the alterant is magnesite.
Preferably, the method for the standing described in institute step S2 is：
Aluminium alloy after refining is skimmed, RJ-2 flux is sprinkled on surface, is warming up to 760~780 DEG C, is stood
30min。
Preferably, the temperature being ultrasonically treated described in step S3 is 700 DEG C.
Preferably, power ultrasonic described in step S3 is 600W.
Preferably, the time being ultrasonically treated described in step S3 is 100s.
Compared with prior art, the present invention has following beneficial effect：
1st, ultrasonic field is introduced in metal bath, utilizes the unique ultrasonic cavitation of ultrasonic field and acoustic streaming effect and metal bath
Interaction, the microstructure of alloy can be significantly improved, add forming core core, nucleation rate is improved, inhibit simultaneously
Crystal is grown up, and can prepare tissue in a short time evenly, the more excellent Mg alloy castings of performance；
2nd, it is ultrasonically treated and belongs to physical method, safe operation is reliable, and no chemical substance produces, free from environmental pollution, cost is low,
Efficiency high.
Brief description of the drawings
The detailed description made by reading with reference to the following drawings to non-limiting example, further feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the preparation flow of the ZM5 Mg alloy castings of the invention based on ultrasonic technology；
Fig. 2 is that (Fig. 2 a are 680 DEG C, figure for influence of the present invention supersound process importing temperature to the magnesium alloy microstructures of ZM 5
2b is 690 DEG C, and Fig. 2 c are 700 DEG C, and Fig. 2 d are 710 DEG C)；
Fig. 3 is that (Fig. 3 a are 0s, Fig. 3 b for influence of the change of sonication treatment time of the present invention to the magnesium alloy microstructures of ZM 5
For 50s, Fig. 3 c are 100s, and Fig. 3 d are 150s)；
Fig. 4 is that (Fig. 4 a are 0W, Fig. 4 b for influence of the change of sonification power of the present invention to the magnesium alloy microstructures of ZM 5
For 400W, Fig. 4 c are 600W, and Fig. 4 d are 800W, and Fig. 4 e are 1000W).
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
Embodiment 1
As shown in figure 1, fusing, refining, aluminium alloy made of rotten, degassing processing will be passed through, respectively 680 DEG C, 690
DEG C, 700 DEG C, 710 DEG C import be ultrasonically treated, processing time control in 100s, ultrasonic power output is 600W.Supersound process terminates
Afterwards, ultrasonic device is quickly moved out, then pours into the ZM5 magnesium alloy fused mass handled in the sand mold prepared.
Embodiment 2
Supersound process, ultrasound output will be imported at 700 DEG C by aluminium alloy made of fusing, refining, rotten, degassing processing
Power setting is 600W, and sonication treatment time controls in 50s, 100s, 150s respectively.After supersound process terminates, it is quickly moved out surpassing
Acoustic equipment, then the ZM5 magnesium alloy fused mass handled is poured into the sand mold prepared.
Embodiment 3
By aluminium alloy made of fusing, refining, rotten, degassing processing supersound process, processing time will be imported at 700 DEG C
Control is respectively set as 400W, 600W, 800W, 1000W in 100s, ultrasonic power output.After supersound process terminates, it is quickly moved out
Ultrasonic device, then the ZM5 magnesium alloy fused mass handled is poured into the sand mold prepared.
More than in three groups of casting for testing to obtain, a part of sample is cut from same area respectively, by inlaying, beating
Mill, polishing and corrosion, corrosive agent used is 4% nital, is then carried out using ESEM and light microscope micro-
See fabric analysis.
As seen from Figure 2：Be ultrasonically treated temperature and do not change the phase composition of alloy, but pattern to alloy microscopic structure and
Size has a large effect, and when being ultrasonically treated 700 DEG C of temperature, the comprehensive function of cavitation and acoustic streaming effect is best, primary α-Mg phases
Crystal grain is most thin, and Mg17Al12 phase sizes are smaller, are evenly distributed.
Fig. 3 is shown：Sonication treatment time does not change alloy phase composition, but to the pattern and chi of each phase in alloy microstructure
It is very little to have a great impact.During sonication treatment time 100s, the forming core effect of ultrasound cavitation effect makes to produce a large amount of nucleus in melt,
And be uniformly distributed under the stirring action of acoustic streaming effect in melt, compared with not being ultrasonically treated, primary α-Mg phase crystallite dimensions
Refinement, Mg17Al12 phase sizes are smaller, and microstructure is evenly distributed.
As shown in figure 4, with the increase of ultrasonic power, the phase composition of alloy is constant, but the chi of three kinds of metallic compounds
Very little and distribution varies widely.When sonification power is 600W, ultrasound cavitation effect forming core acts on most notable, ZM5 alloys
Microstructure thinning is most notable, and compared with not being ultrasonically treated, the average diameter of α-Mg phases refines, and the average diameter of Al8Mn5 phases is thin
Change.
In summary, after supersound process, alloy microscopic structure significantly refines.ZM5 magnesium alloy ultrasounds handle optimised process
700 DEG C, processing power 600W, processing time 100s for the treatment of temperature.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (9)
1. a kind of method that ultrasonic assistant prepares ZM5 Mg alloy castings, it is characterised in that comprise the following steps：
S1：By the composition dispensing of simple metal and intermediate alloy Mg-8Al-0.35Zn-0.40Mn, and it is incubated and is fused into melt；
S2：The melt is refined, gone bad and stood, obtains aluminium alloy；
S3：After the aluminium alloy is ultrasonically treated, casting, coagulation forming, the ZM5 Mg alloy castings are obtained,
Wherein, the simple metal is pure magnesium, fine aluminium and pure zinc, and the intermediate alloy is containing magnesium-manganese intermediate alloy.
2. the method that ultrasonic assistant as claimed in claim 1 prepares ZM5 Mg alloy castings, it is characterised in that in step S1
Before progress, the equipment surface contacted with aluminium alloy is coated into protection coating materials, the protection coating materials include weight percent
The following component of meter：
3. the method that ultrasonic assistant as claimed in claim 1 prepares ZM5 Mg alloy castings, it is characterised in that step S1's
Concrete operations are：
RJ-2 flux is added in crucible, addition is the 0.1~0.25% of furnace charge total amount, and the pure magnesium of drying then is added into earthenware
In crucible, when pure magnesium melts and is warming up to 700~720 DEG C, add fine aluminium, temperature at 710~730 DEG C, add pure zinc and magnesium-
Manganese alloy.
4. the method that ultrasonic assistant as claimed in claim 1 prepares ZM5 Mg alloy castings, it is characterised in that in step S2
The method of described refining is：
Refined using argon gas, blow head insertion melt bottom, logical argon gas is refined and thoroughly taken off after terminating to there is gentle boiling with liquid level
Except surface slag, control magnesium liquid constantly spreads JDMJ solvents on liquid level when seething, and dosage is the 1.5~2.0% of total melt weight,
750 DEG C of start temperature is refined, refining temperature is controlled at 740~750 DEG C.
5. the method that ultrasonic assistant as claimed in claim 1 prepares ZM5 Mg alloy castings, it is characterised in that in step S2
Described rotten method is：
Alterant is added into melt, the dosage for controlling the alterant is the 0.3~0.5% of total melt weight, 740~
Gone bad at 750 DEG C, the alterant is magnesite.
6. the method that ultrasonic assistant as claimed in claim 1 prepares ZM5 Mg alloy castings, it is characterised in that institute step S2
Described in the method for standing be：
Aluminium alloy after refining is skimmed, RJ-2 flux is sprinkled on surface, is warming up to 760~780 DEG C, stands 30min.
7. the method that ultrasonic assistant as claimed in claim 1 prepares ZM5 Mg alloy castings, it is characterised in that in step S3
The temperature of the supersound process is 700 DEG C.
8. the method that ultrasonic assistant as claimed in claim 1 prepares ZM5 magnesium alloys, it is characterised in that described in step S3
The power of ultrasound is 600W.
9. the method that ultrasonic assistant as claimed in claim 1 prepares ZM5 magnesium alloys, it is characterised in that described in step S3
The time of supersound process is 100s.
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| CN201711218567.6A CN107838387A (en) | 2017-11-28 | 2017-11-28 | The method that ultrasonic assistant prepares ZM5 Mg alloy castings |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109868371A (en) * | 2019-01-29 | 2019-06-11 | 大连交通大学 | The guard method of ultrasonic probe |
| CN113523184A (en) * | 2021-06-08 | 2021-10-22 | 上海航天精密机械研究所 | Magnesium alloy sand mold casting method |
| CN115287484A (en) * | 2022-08-05 | 2022-11-04 | 重庆理工大学 | Preparation method of high-strength and high-toughness cast rare earth magnesium alloy and magnesium alloy |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109868371A (en) * | 2019-01-29 | 2019-06-11 | 大连交通大学 | The guard method of ultrasonic probe |
| CN113523184A (en) * | 2021-06-08 | 2021-10-22 | 上海航天精密机械研究所 | Magnesium alloy sand mold casting method |
| CN115287484A (en) * | 2022-08-05 | 2022-11-04 | 重庆理工大学 | Preparation method of high-strength and high-toughness cast rare earth magnesium alloy and magnesium alloy |
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