CN205763873U - Fe-Ni soft magnetic alloy powder tundish is prepared in water atomization - Google Patents
Fe-Ni soft magnetic alloy powder tundish is prepared in water atomization Download PDFInfo
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Abstract
The utility model discloses a kind of water atomization and prepare fe-Ni soft magnetic alloy powder tundish.Described tundish includes: tundish body, for accommodating melted aluminium alloy；Protective coating, is arranged on the inwall of described tundish body, is used for preventing described tundish body and aluminium alloy generation chemical reaction.Protective coating of the present utility model is magnesium oxide, smears magnesium oxide coating on the inwall of bottom pour ladle, it is to avoid molten steel directly contacts with graphite clay material, reduces and eliminates the generation of molten steel foam, make atomization stable processing technique smooth；Can also improve the service life of tundish, tundish, by the service life of 1 to 2 heats before, can extend to 10 heats, thus greatly reduce production cost simultaneously.
Description
Technical field
This utility model relates to a kind of atomization tundish, prepares in fe-Ni soft magnetic alloy powder particularly to a kind of water atomization
Between wrap, belong to field of powder metallurgy.
Background technology
Fe-Ni Alloy Powder is the custom catalysts material of diamond synthesizing, generally uses melting atomization to prepare.Preparation
During, first by alloy melting, then molten steel is poured into bottom pour ladle (i.e. tundish).Generally bottom pour ladle uses graphite clay material system
Become, see Fig. 1, only include the tundish body 1 being made up of graphite clay, when, after high-temperature molten steel 2 and bottom pour ladle contact internal walls, producing
Raw substantial amounts of bubble 3, forms blister steel, hinders the flowing of molten steel, and technique produces impact, and the making of bottom pour ladle under this operating mode
Drastically reduce with the life-span.
In the technical process of powder by atomization, molten steel pours into bottom pour ladle, from the leakage eye device stream being arranged at liquid-leaking nozzle bottom bottom pour ladle
Go out.When molten steel is iron-nickel alloy, when using graphite clay bottom pour ladle, pour the molten steel of bottom pour ladle into owing to there is reaction between carbon and oxygen under high temperature,
Generate a large amount of CO and CO2Bubble, hinders molten steel to the proper flow of leakage eye, even causes splash, blocking package to make atomization process eventually
Only.The result of this technique is often the discarded of bottom pour ladle, it is impossible to reuses, increases production cost.
Summary of the invention
Not enough for prior art, the purpose of this utility model is to provide a kind of water atomization and prepares fe-Ni soft magnetic alloy powder use
Tundish, this tundish inwall (including sidewall and diapire) is attached with one layer of protective coating, is avoided that molten steel and graphite clay material
The directly contact of matter, reduces and eliminates the generation of molten steel foam；The service life of bottom pour ladle can be improved simultaneously, reduce the one-tenth produced
This, little steel ladle is used in the atomization of particularly suitable iron-based high temp molten steel.
For achieving the above object, this utility model is by the following technical solutions:
Fe-Ni soft magnetic alloy powder tundish is prepared in a kind of water atomization, and described tundish includes:
Tundish body, is formed with aluminium alloy receiving portion, for accommodating melted aluminium alloy；The end of described tundish body
Face is provided with liquid-leaking nozzle, is used for making the intrinsic aluminium alloy of tundish naturally fall；
Protective coating, is arranged on the inwall of described tundish body, is used for preventing described tundish body and aluminium alloy
Chemical reaction occurs, and the thickness of described protective coating is 5-10mm (such as 6mm, 7mm, 8mm, 9mm or 10mm), if the thinnest,
Easily decortication breakages etc., the thickest, the change that can cause bottom pour ladle volume is too big, will cause producing in tundish warm simultaneously
Raw crackle, impact uses.
In fe-Ni soft magnetic alloy powder tundish is prepared in above-mentioned water atomization, as a kind of preferred implementation, described in
Between the material of bag body be graphite clay.Graphite clay belongs to the tundish used when water atomization prepares fe-Ni soft magnetic alloy powder
Conventional material, be commercially available prod.
In fe-Ni soft magnetic alloy powder tundish is prepared in above-mentioned water atomization, described aluminium alloy is iron-nickel alloy liquid, such as
The trade mark is the iron-nickel alloy liquid of 1J46,1J50,1J54.
In fe-Ni soft magnetic alloy powder tundish is prepared in above-mentioned water atomization, as a kind of preferred implementation, described in
Between wrap and also include leaking eye device, described leakage eye device is removable installed at described liquid-leaking nozzle, and this is the most internal to be used for making tundish
Aluminium alloy fall by fixing speed.
In fe-Ni soft magnetic alloy powder tundish is prepared in above-mentioned water atomization, as a kind of preferred implementation, described leakage
Inwall at fluid apertures is also equipped with protective coating.So can strengthen the intensity at the liquid-leaking nozzle of tundish, reduce and change leakage eye
Destruction to tundish bottom during device.
In fe-Ni soft magnetic alloy powder tundish is prepared in above-mentioned water atomization, as a kind of preferred implementation, described anti-
The material protecting coating is magnesium oxide, magnesium aluminate spinel or boron nitride；It is further preferred that the material of described protective coating is oxidation
Magnesium；Magnesium aluminate spinel manufacturing process is more complicated, and needs through high-temperature process；And boron nitride coating is the most resistance to
Less than 1000 DEG C in temperature, easy scaling loss is fallen thus is lost defencive function.Magnesium oxide coating is cheap and easy to get, uses simple, is to water
The first-selected coating that steel is on-the-spot.
The manufacture method of fe-Ni soft magnetic alloy powder tundish is prepared in above-mentioned water atomization, comprises the steps:
Step one, carries out being mixed to get coating by material powder and water.Can manually carry out mixing when mixing in a small amount to stir
Mix, then need when a large amount of mixing to use batch mixer, preferably with the batch mixer of agitating function.
Step 2, by described coating material on the inwall of described tundish body, obtains tundish base substrate；
Step 3, tundish base substrate step 2 obtained carries out nature and dries, carries out baking process afterwards, finally give
Described tundish.
In above-mentioned manufacture method, as a kind of preferred implementation, in step one, described material powder is magnesia powder
End, magnesium aluminate spinel powder or boron nitride powder；It is highly preferred that described material powder is magnesium oxide powder, described magnesia powder
Granularity be 0.5-30 μm (such as 0.5-1 μm, 1-10 μm, 10-20 μm, 20-30 μm, 25-30 μm, 5-15 μm, 20-25 μm),
It is further preferred that the granularity meso-position radius D50 of described magnesia powder be 10-20 μm (such as 11 μm, 13 μm, 15 μm, 16 μm, 17 μm,
18μm、19μm).The selection of magnesia ceramics Powder Particle Size is critically important, and the thickest powder particle is easily caused coating and falls grain, surface
Unsmooth, the problem such as easily crack；The most tiny powder then brings difficulty in processing preparation process, is such as difficult to mix
Even, mixture coating easily produces the problems such as bubble parcel.
Manufacturing process of the present utility model without using binding agent, environmental protection and low cost.
In above-mentioned manufacture method, as a kind of preferred implementation, in step one, described magnesia powder and the matter of described water
Amount ratio is 1:0.6 to 1:2 (such as 1:0.7,1:0.8,1:0.9,1:1,1:1.2,1:1.3,1:1.5,1:1.7,1:1.9).
In above-mentioned manufacture method, as a kind of preferred implementation, in step 2, described in the thickness smeared be 5-10mm
(such as 6mm, 7mm, 8mm, 9mm or 10mm).The thickness smeared is the most uniformly.
In above-mentioned manufacture method, as a kind of preferred implementation, in step 3, the temperature that described baking processes is 800-
1100 DEG C (such as 820 DEG C, 850 DEG C, 880 DEG C, 920 DEG C, 950 DEG C, 980 DEG C, 1020 DEG C, 1030 DEG C, 1050 DEG C, 1080 DEG C,
1090 DEG C), temperature retention time is 15-30min (such as 16min, 18min, 20min, 22min, 25min, 28min)；It is highly preferred that
The temperature that described baking processes is 900-1000 DEG C, and temperature retention time is 30min；Further, described baking processes and uses flame
Rifle, specifically, is controlled to be 5-10min by the time of room temperature to 500 DEG C, and is incubated 10-15min at 500 DEG C, be used for sloughing
Moisture in coating；Controlled to be 8-12min by 500 DEG C of times being warming up to 700 DEG C afterwards, and be incubated 5-8min at 700 DEG C, with
Reach to remove the purpose of water of crystallization in coating, under the baking treatment temperature of 900-1000 DEG C, be then incubated 15-30min,
Toast a period of time at a temperature of 900-1000 DEG C and will improve coating hardness and consistency, be beneficial to resist the impact of molten steel.
Coating prepared by this utility model method is not the coating of sintered state, compares the coating of fully sintered state, is using
In coating of the present utility model there is not the unmatched problem of the coefficient of expansion, this patent uses low-temperature bake, and coating is in does not burns
, will there is portion void in knot state between matrix and coating, compensate the stress that coefficient of expansion difference is brought during use, so
Service life extends.
Compared with prior art, the beneficial effects of the utility model are:
This utility model uses magnesium oxide slurry coating material to form magnesium oxide protective coating in tundish inner body wall, it is to avoid
Molten steel directly contacts with graphite clay material, reduces and eliminates the generation of molten steel foam, make atomization stable processing technique suitable
Profit；Can also improve the service life of tundish, tundish, by the service life of 1 to 2 heats before, can extend to 10 simultaneously
More than heat, thus greatly reduce production cost；It addition, coating of the present utility model also prevents graphite clay tundish material
Come off and in aluminium alloy, form the function that is mingled with.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of traditional tundish equipped with molten steel；
Fig. 2 is the schematic diagram of the tundish equipped with molten steel that this utility model provides.
Wherein, 1-tundish body；2-molten steel (i.e. aluminium alloy)；3-bubble；4-protective coating；5, liquid-leaking nozzle；6-alloy
Liquid receiving portion.
Detailed description of the invention
The technical solution of the utility model is described in further detail by example below in conjunction with accompanying drawing.
Embodiment 1
The tundish of this embodiment includes: tundish body 1, is formed with aluminium alloy receiving portion 6, for accommodating melted conjunction
Gold liquid 2；The bottom surface of described tundish body 1 is provided with liquid-leaking nozzle 5, is used for arranging leakage eye device.Tundish body 1 glues for graphite
Soil material；Protective coating 4, is arranged on the inwall (described inwall includes sidewall and diapire) of tundish body 1, is used for preventing from melting
The inwall generation chemical reaction of the aluminium alloy 2 melted and tundish body 1 and erosion, protective coating 4 is magnesium oxide coating, thick coating
Degree is about 6mm.Tundish body 1 also includes the leakage eye device (not shown) being arranged at liquid-leaking nozzle 5, so that tundish
Intrinsic aluminium alloy is fallen by fixing speed, and leakage eye device can on-demand be bought from market, and it can control the flow velocity of aluminium alloy.
There is the preparation of the tundish of protective coating, specifically comprise the following steps that
(1) (purity is more than 95%, and granularity is 0.5-30 μm to weigh 1kg magnesia ceramics powder；Granularity D50=20 μm),
Add water 1000g, after mix homogeneously, obtain coating；
(2) the tundish body (the most existing tundish) that coating material material is graphite clay step (1) obtained
Inwall, smears as far as possible uniform, and the thickness smeared is 6mm；
(3) by flame gun, the tundish base substrate that step (2) obtains is carried out baking process, particularly as follows: by room temperature extremely
The time of 500 DEG C controls to be 8min, and is incubated 15min at 500 DEG C；Then being warming up to 700 DEG C by 500 DEG C, it is total that this section heats up
Time controls to be 10min, and is incubated 5min at 700 DEG C, to reach to remove the purpose of water of crystallization in coating；Risen by 700 DEG C afterwards
Temperature is to 950 DEG C, and programming rate need not control especially, and is incubated 20min under the baking temperature of about 950 DEG C, finally gives this
The tundish of utility model.
Molten steel pours into tundish prepared by the present embodiment, and in atomization process, molten steel calmness is without obvious bubble, can be repeatedly
Using more than 10 heats, for not having cated tundish, service life of the present utility model improves 10 times.
Embodiment 2
The tundish of this embodiment includes: tundish body 1, is formed with aluminium alloy receiving portion 6, for accommodating melted conjunction
Gold liquid 2；The bottom surface of described tundish body 1 is provided with liquid-leaking nozzle 5, is used for arranging leakage eye device.Tundish body 1 glues for graphite
Soil material；Protective coating 4, is arranged on the inwall (described inwall includes sidewall and diapire) of tundish body 1, is used for preventing from melting
The inwall generation chemical reaction of the aluminium alloy 2 melted and tundish body 1 and erosion, protective coating 4 is magnesium oxide coating, thick coating
Degree is about 3mm.Tundish body 1 also includes the leakage eye device (not shown) being arranged at liquid-leaking nozzle 5, so that tundish
Intrinsic aluminium alloy is fallen by fixing speed, and leakage eye device can on-demand be bought from market, and it can control the flow velocity of aluminium alloy.
Concrete manufacturing step is as follows:
(1) (purity is more than 95%, and granularity is 0.5-30 μm to weigh 1kg magnesia ceramics powder；Granularity D50=20 μm),
Add water 1000g, after mix homogeneously, obtain coating；
(2) coating material step (1) obtained is graphite clay tundish body (the most existing tundish) to material
Inwall, smears as far as possible uniform, and the thickness smeared is 3mm；
(3) the tundish base substrate that step (2) obtains is carried out baking process, specifically, by room temperature extremely by flame gun
The time of 500 DEG C controls to be 8min, and is incubated 15min at 500 DEG C；Then being warming up to 700 DEG C by 500 DEG C, it is total that this section heats up
Time controls to be 10min, and is incubated 5min at 700 DEG C, to reach to remove the purpose of water of crystallization in coating；Risen by 700 DEG C afterwards
Temperature is to 1000 DEG C, and programming rate need not control especially, and is incubated 20min under the baking temperature of about 1000 DEG C, finally gives
Composite coating tundish.
Molten steel pours into coating tundish prepared by the present embodiment, and in atomization process, molten steel calmness is without obvious bubble, permissible
More than Reusability 5 heat, for not having cated tundish, improve 5 times service life of the present utility model, but
It is to compare with embodiment 1, thickness of coating decreasing half, cause actual life to shorten half.
Embodiment 3
The tundish of this embodiment includes: tundish body 1, is formed with aluminium alloy receiving portion 6, for accommodating melted conjunction
Gold liquid 2；The bottom surface of described tundish body 1 is provided with liquid-leaking nozzle 5, is used for arranging leakage eye device.Tundish body 1 glues for graphite
Soil material；Protective coating 4, is arranged on the inwall (described inwall includes sidewall and diapire) of tundish body 1, is used for preventing from melting
The inwall generation chemical reaction of the aluminium alloy 2 melted and tundish body 1 and erosion, protective coating 4 is magnesium oxide coating, thick coating
Degree is about 6mm.Tundish body 1 also includes the leakage eye device (not shown) being arranged at liquid-leaking nozzle 5, so that tundish
Intrinsic aluminium alloy is fallen by fixing speed, and leakage eye device can on-demand be bought from market, and it can control the flow velocity of aluminium alloy.
Concrete manufacturing step is as follows:
(1) weigh 1kg magnesia ceramics powder (purity is more than 95%, and granularity D50=50 μm, granularity is 5-100 μm), add
Enter water 1000g, after mix homogeneously, obtain coating；
(2) coating material step (1) obtained is graphite clay tundish body (the most existing tundish) to material
Inwall, smears as far as possible uniform, and smearing thickness is 6mm；
(3) tundish that step (2) obtains is carried out baking process, specifically, by room temperature to 500 DEG C by flame gun
Time control as 8min, and be incubated 15min at 500 DEG C；Then it is warming up to 700 DEG C by 500 DEG C, the total time control that this section heats up
It is made as 10min, and is incubated 5min at 700 DEG C, to reach to remove the purpose of water of crystallization in coating；It is warming up to 950 afterwards by 700 DEG C
DEG C, programming rate need not control especially, and is incubated 20min under the baking temperature of about 1100 DEG C, finally gives composite coating
Tundish.
Molten steel pours into coating tundish prepared by the present embodiment, and in atomization process, molten steel calmness is without obvious bubble, permissible
More than Reusability 3 heat, detection coating service condition finds that bottom pour ladle rough inner surface causes substantial amounts of extension steel phenomenon, part
Coating granule comes off, and blocks molten steel outlet, makes bottom pour ladle not reuse.For not having cated tundish, this reality
With improve 3 times novel service life, but bring the ill situation of technique.
Embodiment 4
The tundish of this embodiment includes: tundish body 1, is formed with aluminium alloy receiving portion 6, for accommodating melted conjunction
Gold liquid 2；The bottom surface of described tundish body 1 is provided with liquid-leaking nozzle 5, is used for arranging leakage eye device.Tundish body 1 glues for graphite
Soil material；Protective coating 4, is arranged on the inwall (described inwall includes sidewall and diapire) of tundish body 1, is used for preventing from melting
The inwall generation chemical reaction of the aluminium alloy 2 melted and tundish body 1 and erosion, protective coating 4 is magnesium oxide coating, thick coating
Degree is about 6mm.Tundish body 1 also includes the leakage eye device (not shown) being arranged at liquid-leaking nozzle 5, so that tundish
Intrinsic aluminium alloy is fallen by fixing speed, and leakage eye device can on-demand be bought from market, and it can control the flow velocity of aluminium alloy.
Concrete manufacturing step is as follows:
(1) weigh 1kg magnesia ceramics powder (purity is more than 95%, granularity D50=10 μm), add water 1000g, mixing
Coating is obtained after Jun Yun；
(2) coating material step (1) obtained is graphite clay tundish body (the most existing tundish) to material
Inwall, smears as far as possible uniform, and smearing thickness is 6mm；
(3) the tundish base substrate that step (2) obtains is carried out baking process, specifically, by room temperature extremely by flame gun
The time of 500 DEG C controls to be 8min, and is incubated 15min at 500 DEG C；Then being warming up to 700 DEG C by 500 DEG C, it is total that this section heats up
Time controls to be 10min, and is incubated 5min at 700 DEG C, to reach to remove the purpose of water of crystallization in coating；Risen by 700 DEG C afterwards
Temperature is to 950 DEG C, and programming rate need not control especially, and is incubated 20min under the baking temperature of about 950 DEG C, finally gives multiple
Close coating tundish.
Molten steel pours into coating tundish prepared by the present embodiment, and in atomization process, molten steel calmness is without obvious bubble, permissible
More than Reusability 15 heat, for not having cated tundish, service life of the present utility model improves 15 times.
Owing to this example have employed more tiny powder size, prepared coating is the most smooth, and after having crossed molten steel, coating surface is basic
Do not change much.
Embodiment 5
In the present embodiment in addition to the mass ratio of magnesium oxide Yu water is different from embodiment 1, other preparation technologies all with implement
Example 1 is identical.The present embodiment magnesium oxide is 1:0.6 with the mass ratio of water.
Molten steel pours into tundish prepared by the present embodiment, and in atomization process, molten steel calmness is without obvious bubble, can be repeatedly
Using more than 4 heats, for not having cated tundish, service life of the present utility model improves 4 times.
Embodiment 6
In the present embodiment in addition to the mass ratio of magnesium oxide Yu water is different from embodiment 1, other preparation technologies all with implement
Example 1 is identical.The present embodiment magnesium oxide is 1:2 with the mass ratio of water.
Molten steel pours into tundish prepared by the present embodiment, and in atomization process, molten steel calmness is without obvious bubble, can be repeatedly
Using more than 8 heats, for not having cated tundish, service life of the present utility model improves 8 times.
Embodiment 7
In the present embodiment in addition to baking condition is different from embodiment 1, other preparation technologies are the most same as in Example 1.This
The baking condition of embodiment is: from room temperature, tundish base substrate is directly heated to 1100 DEG C, and is incubated 30min.
Molten steel pours into tundish prepared by the present embodiment, and in atomization process, molten steel calmness is without obvious bubble, can be repeatedly
Using more than 5 heats, for not having cated tundish, service life of the present utility model improves 5 times.
Technological parameter interval of the present utility model bound value and interval value can realize this law, and differ string at this
For embodiment.
Claims (5)
1. fe-Ni soft magnetic alloy powder tundish is prepared in a water atomization, it is characterised in that described tundish includes:
Tundish body, is formed with aluminium alloy receiving portion, for accommodating melted aluminium alloy；On the bottom surface of described tundish body
It is provided with liquid-leaking nozzle, is used for making the intrinsic aluminium alloy of tundish naturally fall；
Protective coating, is arranged on the inwall of described tundish body, is used for preventing described tundish body from occurring with aluminium alloy
Chemical reaction, the thickness of described protective coating is 5-10mm.
Fe-Ni soft magnetic alloy powder tundish is prepared in water atomization the most according to claim 1, it is characterised in that described centre
The material of bag body is graphite clay.
Fe-Ni soft magnetic alloy powder tundish is prepared in water atomization the most according to claim 1, it is characterised in that described centre
Bag also includes leaking eye device, and described leakage eye device is removable installed at described liquid-leaking nozzle, is used for making tundish intrinsic
Aluminium alloy is fallen by fixing speed.
Fe-Ni soft magnetic alloy powder tundish is prepared in water atomization the most according to claim 1, it is characterised in that described leakage
Inwall at hole is also equipped with protective coating.
Fe-Ni soft magnetic alloy powder tundish is prepared in water atomization the most according to claim 1, it is characterised in that described protection
The material of coating is magnesium oxide, magnesium aluminate spinel or boron nitride.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106180670A (en) * | 2016-06-30 | 2016-12-07 | 安泰科技股份有限公司 | Fe-Ni soft magnetic alloy powder tundish and manufacture method thereof are prepared in water atomization |
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2016
- 2016-06-30 CN CN201620683750.8U patent/CN205763873U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106180670A (en) * | 2016-06-30 | 2016-12-07 | 安泰科技股份有限公司 | Fe-Ni soft magnetic alloy powder tundish and manufacture method thereof are prepared in water atomization |
| CN106180670B (en) * | 2016-06-30 | 2019-11-12 | 安泰（霸州）特种粉业有限公司 | Water atomization prepares fe-Ni soft magnetic alloy powder tundish and its manufacturing method |
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Effective date of registration: 20171227 Address after: 065701 Langfang city of Hebei province Bazhou city Shengfang town Wuping Road North Co-patentee after: Antai Science and Technology Co., Ltd. Patentee after: An Tai (Bazhou) special flour Co., Ltd. Address before: 100081 Haidian District Institute of South Road, Beijing, No. 76 Patentee before: Antai Science and Technology Co., Ltd. |