CN208811049U - A kind of magnesium alloy semicontinuous casting crystal grain fining device - Google Patents
A kind of magnesium alloy semicontinuous casting crystal grain fining device Download PDFInfo
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- CN208811049U CN208811049U CN201820338208.8U CN201820338208U CN208811049U CN 208811049 U CN208811049 U CN 208811049U CN 201820338208 U CN201820338208 U CN 201820338208U CN 208811049 U CN208811049 U CN 208811049U
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Abstract
The utility model discloses a kind of magnesium alloy semicontinuous casting crystal grain fining device.The device is applied to semi-continuous casting equipment, is fixed at the top of the Casting Equipment crystallizer, the crystal grain refinement device includes: the hollow iron core of silicon steel laminations, coil, insulating ceramic fiber；The hollow iron core sleeve of silicon steel laminations is located at the outer surface of the liquid inlet conduit of the Casting Equipment, with the gap of set distance between the outer surface of the conduit；The coil is around the hollow iron core winding of the silicon steel laminations；The insulating ceramic fiber is arranged between the coil and the hollow iron core of the silicon steel laminations, and the insulating ceramic fiber is by the coil and the hollow core insulation of the silicon steel laminations.Electromagnetic energy processing is carried out to melt by the crystal grain refinement device, reduces the crystallite dimension with uniform slab, improves slab quality.
Description
Technical field
The utility model relates to metal freezing technical fields, more particularly to a kind of magnesium alloy semicontinuous casting crystal grain fining
Device.
Background technique
The wrought magnesium alloy molded part haveing excellent performance in order to obtain is needed using the first starting-ingot of high-quality wrought magnesium alloy
Base.The wrought magnesium alloy ingot blank that the semi-continuous casting being typically used for obtains is uneven there are organizational coarseness and size and is segregated,
The serious problem of surface oxidation is unfavorable for the subsequent hot-working of ingot blank, also will affect the performance of product.
Improve the uniformity and its mechanical property of tissue by the method for crystal grain refinement in the prior art, and after capable of improving
Formability in continuous process, it is ensured that crystallite dimension fine uniform after recrystallization.Therefore, crystal grain refinement is a kind of important
Improve the method for wrought magnesium alloy ingot quality.
In the prior art, the method for crystal grain refinement mainly has addition grain refiner during magnesium alloy semi-continuous casting
Method, low to the degree of refinement of the crystal grain of wrought magnesium alloy ingot casting, thinning effect is unstable, wrought magnesium alloy ingot casting it is of poor quality.
Utility model content
The purpose of the utility model is to provide a kind of magnesium alloy semicontinuous casting crystal grain finings that can be improved slab quality
Device.
To achieve the above object, the utility model provides following scheme:
A kind of magnesium alloy semicontinuous casting crystal grain fining device, the crystal grain refinement device are set applied to semi-continuous casting
It is standby, be fixed at the top of the Casting Equipment crystallizer, the crystal grain refinement device include: the hollow iron core of silicon steel laminations,
Coil, insulating ceramic fiber；
The hollow iron core sleeve of silicon steel laminations is located at the outer surface of the liquid inlet conduit of the Casting Equipment, with the conduit
With the gap of set distance between outer surface；
The coil is around the hollow iron core winding of the silicon steel laminations；
The insulating ceramic fiber is arranged between the coil and the hollow iron core of the silicon steel laminations, the insulating ceramics
Fiber is by the coil and the hollow core insulation of the silicon steel laminations.
Optionally, the coil is the copper conductor of inner hollow, and the hollow parts of the copper conductor are cooling water cavity, institute
The one end for stating copper conductor is coil cooling water inlet, and the other end of the copper conductor is coil cooling water outlet.
Optionally, the crystal grain refinement device further include: bracket, the coil and the hollow iron core of the silicon steel laminations are fixed
On the bracket, the coil and the hollow iron core of the silicon steel laminations are fixed on the crystallization of the Casting Equipment by the bracket
On device.
Optionally, the magnesium alloy in the lower surface of the hollow iron core of the silicon steel laminations and the crystallizer of the Casting Equipment is molten
Absolute distance between the upper surface of liquid is less than 10mm.
Optionally, the crystal grain refinement device further include: the pulse power, the pulse power are connect with the coil, are
The coil provides pulse current.
According to specific embodiment provided by the utility model, the utility model discloses following technical effects: this is practical new
Type discloses a kind of magnesium alloy semicontinuous casting crystal grain fining device.Electromagnetic energy is carried out to the melt by the device for thinning
Processing, under the action of electromagnetic energy, melts intracorporal birth nucleus quantity and increases, improve the degree of melt crystal grain refinement, improves
The mechanical property and deformation performance of ingot casting.Continuous casting billet structure can be refined, the crystallite dimension with uniform slab is reduced, improves slab matter
Amount.
Since the degree of refinement of melt crystal grain improves, so, microcosmic cracking severity is lower, and the surface quality of ingot casting is good.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without any creative labor, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the structure chart of magnesium alloy semicontinuous casting crystal grain fining device provided by the utility model；
Fig. 2 is the cross-sectional view of the structure of magnesium alloy semicontinuous casting crystal grain fining device provided by the utility model；
Fig. 3 is the top view of the structure of magnesium alloy semicontinuous casting crystal grain fining device provided by the utility model；
Fig. 4 is the waveform diagram of the pulse current of magnesium alloy semicontinuous casting crystal grain fining device provided by the utility model；
Fig. 5 is the current density distribution values mould of magnesium alloy semicontinuous casting crystal grain fining device provided by the utility model
It is quasi- to calculate polar plot；
Fig. 6 is the Magnetic Induction Density Distribution vector of magnesium alloy semicontinuous casting crystal grain fining device provided by the utility model
Figure；
Fig. 7 is the electromagnetic force polar plot of magnesium alloy semicontinuous casting crystal grain fining device provided by the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The purpose of the utility model is to provide a kind of magnesium alloy semicontinuous casting crystal grain finings that can be improved slab quality
Device.
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing and have
Body embodiment is described in further detail the utility model.
Fig. 1 is the structure chart of magnesium alloy semicontinuous casting crystal grain fining device, and Fig. 2 is that magnesium alloy semi-continuous casting crystal grain is thin
Disguise the cross-sectional view for the structure set, Fig. 3 is the top view of the structure of magnesium alloy semicontinuous casting crystal grain fining device.
As shown in Figure 1, Figure 2 and Figure 3, a kind of magnesium alloy semicontinuous casting crystal grain fining device, the crystal grain refinement device
Applied to semi-continuous casting equipment, it is fixed at the top of the Casting Equipment crystallizer, the crystal grain refinement device includes:
The hollow iron core 24 of silicon steel laminations, coil 25, insulating ceramic fiber 28.
The hollow iron core 24 of silicon steel laminations is set in the outer surface of the liquid inlet conduit 2 of the Casting Equipment, leads with described
With the gap of set distance between the outer surface of pipe 2.
The coil 25 is wound around the hollow iron core 24 of the silicon steel laminations.
The crystal grain refinement device enters the magnesium alloy fused mass application of crystallizer 21 and 29 upper surface of ingot casting to conduit 2 is flowed through
A kind of surface Pulse High Voltage electromagnetic energy effect, electromagnetic energy can promote forming core, improve nucleation rate, realize that solidified structure crystal grain is equal
Even refinement not only increases nucleation rate, and crystal growth is promoted to change equiax crystal growth pattern by column crystal, and crystal grain can obtain
To significant refinement, and in ingot casting, crystallite dimension more refine and is uniformly distributed, and obtains the ingot casting of high quality, and have technique simple
Single, low in cost, easy to operate advantage.
The temperature of the melt of the crystal grain refinement device processing is 650 DEG C, and the ingot casting pulling rate in casting process is 60mm/
min。
The insulating ceramic fiber 28 is arranged between the coil 25 and the hollow iron core 24 of the silicon steel laminations, described exhausted
Edge ceramic fibre 28 insulate the coil 25 and the hollow iron core 24 of the silicon steel laminations.
As shown in Fig. 2, the coil 25 is the copper conductor of inner hollow, the hollow parts of the copper conductor are cooling water cavity
Body, one end of the copper conductor are coil cooling water inlet 23, and the other end of the copper conductor is coil cooling water outlet 26.
As shown in Figure 1, the crystal grain refinement device further include: bracket 1, the coil 25 and the silicon steel laminations cored iron
Core 24 is fixed on the bracket 1, and the coil 25 and the hollow iron core 24 of the silicon steel laminations are fixed on described by the bracket 1
On the crystallizer of Casting Equipment.
As depicted in figs. 1 and 2, in the lower surface of the hollow iron core 24 of the silicon steel laminations and the crystallizer of the Casting Equipment
Magnesium alloy melt upper surface between absolute distance be less than 10mm, reduce magnetic loss, surface Pulse High Voltage magnetic field is non-to be connect
Magnesium alloy fused mass is touched, any pollution will not be generated to magnesium alloy fused mass itself, pollution will not be generated to environment.
Fig. 4 is the waveform diagram of the pulse current of magnesium alloy semicontinuous casting crystal grain fining device.
As shown in figure 4, the crystal grain refinement device further include: the pulse power, the pulse power and the coil 25 connect
It connects, provides pulse current, peak value of pulse 100A for the coil 25, pulse current duty ratio is 20%, and pulse frequency is
20Hz is powered using low-frequency and low-voltage, and equipment is simple, safe operation, can directly be installed and used, be saved in the original equipment of factory
Cost and investment.
Before electromagnetic pulse semi-continuous casting starts, the both ends of hollow copper coil are connected to the two of the pulse power
The cooling water of hollow copper coil 25 and crystallizer 21 is opened in pole, when being passed through pulse current to hollow copper coil 25, hollow copper wire
The built-in hollow iron core 24 of silicon steel laminations of 25 excitation of circle generates pulsed magnetic field, carries out electromagnetic energy processing to metal Serum Magnesium.
Electromagnetic pulse crystal grain refinement device is set to above crystallizer, can be applied to different sizes, the different trades mark
The semi-continuous casting production process of magnesium alloy.
Fig. 5 is that the current density distribution values simulation of magnesium alloy semicontinuous casting crystal grain fining device calculates polar plot, such as
Shown in Fig. 5, when crystal grain refinement device works, current density figure in hollow coil 25 and magnesium alloy ingot 29, the hollow line
The number of turns of circle 25 is 90 circles, and being passed through current peak is 100A, frequency 20Hz, the Square wave pulses electric current that duty ratio is 50%.
Fig. 6 is the Magnetic Induction Density Distribution polar plot of magnesium alloy semicontinuous casting crystal grain fining device, as shown in fig. 6, electric
When magnetic field impulse processing, the Magnetic Induction Density Distribution situation in ingot casting is that center portion magnetic induction intensity is larger, and edge is smaller, can supplement
The small problem of center portion degree of supercooling.
Fig. 7 is the electromagnetic force polar plot of magnesium alloy semicontinuous casting crystal grain fining device, as shown in fig. 7, molten to magnesium alloy
When body carries out electromagnetic pulse processing, the distribution of electromagnetic force in magnesium alloy fused mass generates crystal grain on the basis of electromagnetic energy is penetrated into
It is directed toward the electromagnetic force of edge, has squeezing action to magnesium alloy fused mass crystal grain, limits its behavior of growing up, has good crystal grain refinement to make
With.
To achieve the goals above, the utility model additionally provides following scheme:
A kind of magnesium alloy semicontinuous casting crystal grain fining method, the thinning method are applied to a kind of magnesium alloy described above
Semicontinuous casting crystal grain fining device, the method specifically include:
The device for thinning is fixed on to the top of the crystallizer of the Casting Equipment；
After magnesium alloy is melted in smelting furnace, melt is poured into the Casting Equipment by the conduit of the Casting Equipment
Crystallizer in；
It is passed through Pulse High Voltage to the coil, electromagnetic energy processing is carried out to the melt, obtains electromagnetism melt；
The electromagnetism melt is crystallized, cooling treatment, obtains the ingot casting of crystal grain refinement.
Optionally, the method also includes:
After being passed through Pulse High Voltage to the coil, cooling water is passed through at the cooling water inlet of the coil.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For system disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
Specific case used herein is expounded the principles of the present invention and embodiment, above embodiments
Explanation be merely used to help understand the method and its core concept of the utility model；Meanwhile for the general technology of this field
Personnel, based on the idea of the present invention, there will be changes in the specific implementation manner and application range.In conclusion
The content of the present specification should not be construed as a limitation of the present invention.
Claims (5)
1. a kind of magnesium alloy semicontinuous casting crystal grain fining device, which is characterized in that the crystal grain refinement device is applied to partly connect
Continuous Casting Equipment, is fixed at the top of the Casting Equipment crystallizer, and the crystal grain refinement device includes: silicon steel laminations sky
Heart iron core, coil, insulating ceramic fiber；
The hollow iron core sleeve of silicon steel laminations is located at the outer surface of the liquid inlet conduit of the Casting Equipment, the appearance with the conduit
With the gap of set distance between face；
The coil is around the hollow iron core winding of the silicon steel laminations；
The insulating ceramic fiber is arranged between the coil and the hollow iron core of the silicon steel laminations, the insulating ceramic fiber
By the coil and the hollow core insulation of the silicon steel laminations.
2. a kind of magnesium alloy semicontinuous casting crystal grain fining device according to claim 1, which is characterized in that the coil
For the copper conductor of inner hollow, the hollow parts of the copper conductor are cooling water cavity, and one end of the copper conductor is that coil is cold
But water inlet, the other end of the copper conductor are coil cooling water outlet.
3. a kind of magnesium alloy semicontinuous casting crystal grain fining device according to claim 1, which is characterized in that the crystal grain
Device for thinning further include: bracket, the coil and the hollow iron core of the silicon steel laminations are fixed on the bracket, and the bracket will
The coil and the hollow iron core of the silicon steel laminations are fixed on the crystallizer of the Casting Equipment.
4. a kind of magnesium alloy semicontinuous casting crystal grain fining device according to claim 1, which is characterized in that the silicon steel
Between the lower surface of the hollow iron core of lamination and the upper surface of the magnesium alloy melt in the crystallizer of the Casting Equipment it is absolute away from
From less than 10mm.
5. a kind of magnesium alloy semicontinuous casting crystal grain fining device according to claim 1, which is characterized in that the crystal grain
Device for thinning further include: the pulse power, the pulse power are connect with the coil, provide pulse current for the coil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820338208.8U CN208811049U (en) | 2018-03-13 | 2018-03-13 | A kind of magnesium alloy semicontinuous casting crystal grain fining device |
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| CN201820338208.8U CN208811049U (en) | 2018-03-13 | 2018-03-13 | A kind of magnesium alloy semicontinuous casting crystal grain fining device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108188366A (en) * | 2018-03-13 | 2018-06-22 | 内蒙古科技大学 | A kind of magnesium alloy semicontinuous casting crystal grain fining device and method |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108188366A (en) * | 2018-03-13 | 2018-06-22 | 内蒙古科技大学 | A kind of magnesium alloy semicontinuous casting crystal grain fining device and method |
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