CN106917062B - A method of nitriding salt bath clinker is removed using magnetic absorption principle - Google Patents
A method of nitriding salt bath clinker is removed using magnetic absorption principle Download PDFInfo
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- CN106917062B CN106917062B CN201710093302.1A CN201710093302A CN106917062B CN 106917062 B CN106917062 B CN 106917062B CN 201710093302 A CN201710093302 A CN 201710093302A CN 106917062 B CN106917062 B CN 106917062B
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- salt bath
- magnetic
- clinker
- nitriding
- iron core
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
- C23C8/42—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
- C23C8/48—Nitriding
- C23C8/50—Nitriding of ferrous surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
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- Chemical Kinetics & Catalysis (AREA)
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- Organic Chemistry (AREA)
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Abstract
A method of nitriding salt bath clinker being removed using magnetic absorption principle, this method acts on salt bath using applied magnet, adsorbs clinker.The principle of the present invention is: the Curie temperature of iron is at 700 DEG C or more, therefore in the operating temperature range of nitridation salt bath (500-600 DEG C), ferromagnetism may exist, but due to being influenced by high temperature environment, magnetic force decline, as long as therefore providing externally-applied magnetic field i.e. certifiable magnetic efficiency.Most of ingredient of clinker is ferromagnetic material in nitriding salt bath, therefore, guarantees magnetism, that is, adsorbable clinker of clinker near magnetic pole and magnetic pole by externally-applied magnetic field.This method can also remove the fine slag in salt bath to salt-bath nitriding process with crucial effect while removing thick slag, reach the thorough effect of slagging-off, meanwhile, this method does not need to block production in slagging-off, so that production efficiency greatly improves.
Description
Technical field
The invention belongs to salt bath nitriding technical field, the deslagging process being related in salt bath nitriding field, and in particular to one
The method that kind removes nitriding salt bath clinker using magnetic absorption principle.
Background technique
Salt-bath nitriding process is a kind of chemical heat treatment process, which is provided by the cyanic acid ion in salt bath
Activated nitrogen atom, and it is allowed to penetrate into fe-based surface, the iron nitride of hard and compact is formed, to increase substantially iron-based material
Wearability and corrosion stability.In salt bath nitriding technology, how to ensure that the cleaning of salt bath is the key that the technology, it is reliable and thorough
Deslagging process, then be to ensure that the critical process of salt bath cleaning.
The clinker of nitriding salt bath can macroscopically be divided into thick slag and fine slag.Thick slag is easy to sink to the bottom, in nitriding production process
It will not suspend and flow with salt bath, will not be contacted with workpiece, while thick slag is easy to dispose by the commonly means of removing the gred, therefore right
Directly affecting for nitriding quality is very little.And fine slag can then be suspended in salt bath and flow, meeting and work with the flowing of salt bath
The various positions of part are in contact, and when there is contact, the various free gas often discharged in salt bath just in contact point, release by aggregation
It puts to form microbubble, and then forms " solid-liquid-gas " three-phase structure of " metal-saline solution-microbubble " in contact position.This three
Phase structure once being formed, just will affect nitridation quality, such as forms etch pit, generate piebald, generate nitriding and the nitrogen such as unevenly put
Change defect.Therefore, fine slag is to influence the key substance of salt bath nitriding quality.
The ingredient of fine slag is mainly ferromagnetic material and a small amount of graphite particle.Ferromagnetic material has suspension iron ion, suspends
Iron-nitride, suspension ferriferous oxide etc..These suspension ferromagnetic materials are because extremely subtle, it is easy to it is flowed with salt bath, because
This is difficult to remove by general slagging-off means.
The deslagging process of salt bath nitriding has much at present, and earliest is to utilize filter screen filtration clinker, this method operation side
Just, quickly, but thick slag can only be filtered, to fine slag without positive effect.Then sediment disk sediment is developed, this method can filter big portion
Divide clinker, including fine slag, but need the sediment time of a few hours, clinker can be revealed again when pulling sediment disk out, secondary pollution
Salt bath, and need to block production when sediment, it must stop producing when fishing out slag, inefficiency.Therefore, it finds a kind of efficient, thorough
The deslagging process at bottom is necessary.
The operating temperature of nitridation salt bath is at 500-600 DEG C, in this temperature range, common magnetisable material, such as commonly forever
Magnet etc., magnetism can all decline or even be demagnetized.Therefore, magnetic absorption method is not successfully applied since high temperature demagnetizes.
Summary of the invention
It is an object of the invention to: it is not thorough above-mentioned existing nitriding salt bath slagging-off and aiming at the problem that inefficiency, this
Invention provides a kind of method using magnetic absorption principle removal nitriding salt bath clinker, and this method acts on salt using applied magnet
Bath, while thick slag and fine slag are adsorbed, achieve the purpose that thoroughly to remove the gred, while also solving existing salt-bath nitriding process due to slagging-off
The problem of blocking inefficiency caused by production.
The technical solution adopted by the invention is as follows:
A method of nitriding salt bath clinker being removed using magnetic absorption principle, this method acts on salt using applied magnet
Clinker is adsorbed in bath.The principle of the present invention is: the Curie temperature of iron is at 700 DEG C or more, so in the operating temperature model of nitridation salt bath
In enclosing (500-600 DEG C), ferromagnetism may exist, but due to being influenced by high temperature environment, magnetic force decline, as long as therefore mentioning
It can guarantee magnetic efficiency for externally-applied magnetic field.Most of ingredient of clinker is ferromagnetic material in nitriding salt bath, therefore, by outer
Magnetic field is added to guarantee the i.e. adsorbable clinker of magnetism of clinker near magnetic pole and magnetic pole.This method can be with while removing thick slag
The fine slag in salt bath to salt-bath nitriding process with crucial effect is removed, the thorough effect of slagging-off is reached, meanwhile, this method is being removed
It does not need to block production when slag, so that production efficiency greatly improves.
The applied magnet is by ungulate iron core and is arranged on ungulate iron core and makes the magnetized magnetic devices structure of ungulate iron core
At.Using ungulate iron core, and on ungulate iron core, setting can make its magnetized magnetic devices, so that guaranteeing ungulate core magnetism performance
While, magnetic devices do not contact directly with high-temperature salt bath, so that avoiding the high temperature demagnetization of salt bath influences, and ungulate iron core can be
More uniform magnetic field is formed between magnetic pole, the magnetic line of force can also be made to form access, enhances suction.
The magnetic devices are permanent magnet or coil.Permanent magnet can be such that ungulate iron core remains to be magnetic, and coil is then
The size of magnetic field strength can be adjusted as needed.
The mode that applied magnet acts on salt bath is to protrude into salt bath the magnetic pole of ungulate iron core or extract salt bath out cocurrent
Magnetic pole through ungulate iron core.Directly the magnetic pole of ungulate iron core is put into salt bath, after magnetizing ungulate iron core by magnetic devices
It can reach the effect of absorption clinker, structure is simple, is convenient for operation, and at low cost.Salt bath is extracted out and flows through ungulate iron core
Magnetic pole, can make the clinker in salt bath when following salt bath to flow can close to magnetic pole and be adsorbed, be conducive to thoroughly remove furnace
Slag.
Ungulate iron core between the magnetic pole and magnetic devices is equipped with cooling down packet, can avoid salt bath high temperature and is conducted into
At magnetic devices, the magnetic efficiency of ungulate iron core is influenced.
By the way of salt bath is extracted out and flows through the magnetic pole of ungulate iron core method particularly includes: by salt bath from containing salt bath
Nitridation salt bath in extract out and make salt bath flow through one be arranged in nitridation salt bath above flow guiding inclined plate, make salt bath and setting exist
Magnetic pole contact on flow guiding inclined plate.Make salt bath circulation by the way that flow guiding inclined plate is arranged, remove the gred more thorough, and is recycled in salt bath
During slagging-off, production can be carried out continuously.
It is provided with filter screen on flow guiding inclined plate below magnetic pole, can be further ensured that slagging-off effect, avoids being adsorbed by magnetic pole
Clinker afterwards is fallen into again in nitridation salt bath, causes secondary pollution.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1. providing a kind of method using magnetic absorption principle removal nitriding salt bath clinker, this method uses applied magnet
Salt bath is acted on, while adsorbing thick slag and fine slag, achievees the purpose that thoroughly to remove the gred, while also solving existing salt-bath nitriding process
The problem of inefficiency caused by production is blocked because of slagging-off；
2. the applied magnet that the present invention uses is by ungulate iron core and is arranged on ungulate iron core and keeps ungulate iron core magnetized
Magnetic devices are constituted, so that magnetic devices do not contact directly with high-temperature salt bath while guaranteeing ungulate core magnetism performance, to keep away
The high temperature demagnetization for opening salt bath influences, and ungulate iron core can form more uniform magnetic field between magnetic pole, can also the magnetic line of force be made to be formed
Access enhances suction；
3. directly the magnetic pole of ungulate iron core is put into salt bath, can reach after magnetizing ungulate iron core by magnetic devices
The effect of clinker is adsorbed, structure is simple, is convenient for operation, and at low cost；
4. making salt bath circulation by the way that flow guiding inclined plate is arranged, remove the gred more thorough, and in the process of salt bath circulation slagging-off
In, production can be carried out continuously；
5. can be further ensured that slagging-off effect by the way that filter screen is arranged on the flow guiding inclined plate below magnetic pole, avoid by magnetic
Clinker after the absorption of pole is fallen into again in nitridation salt bath, causes secondary pollution.
Detailed description of the invention
Fig. 1 is the schematic diagram of embodiment 1；
Fig. 2 is the schematic diagram of embodiment 2.
Marked in the figure: 1- nitrogenizes salt bath, 2- magnetic pole, 3- salt bath, the ungulate iron core of 4-, 5- cooling down packet, 6- magnetism dress
It sets, 7- filter screen, 8- flow guiding inclined plate, 9- takes out salt pipeline, 10- circulating pump.
Specific embodiment
All features disclosed in this specification can be with any other than mutually exclusive feature and/or step
Mode combines.
It elaborates below with reference to Fig. 1, Fig. 2 to the present invention.
A method of nitriding salt bath clinker being removed using magnetic absorption principle, this method acts on salt using applied magnet
Clinker is adsorbed in bath.The principle of the present invention is: the Curie temperature of iron is at 700 DEG C or more, so in the operating temperature model of nitridation salt bath
In enclosing (500-600 DEG C), ferromagnetism may exist, but due to being influenced by high temperature environment, magnetic force decline, as long as therefore mentioning
It can guarantee magnetic efficiency for externally-applied magnetic field.Most of ingredient of clinker is ferromagnetic material in nitriding salt bath, therefore, by outer
Magnetic field is added to guarantee the i.e. adsorbable clinker of magnetism of clinker near magnetic pole and magnetic pole.This method can be with while removing thick slag
The fine slag in salt bath to salt-bath nitriding process with crucial effect is removed, the thorough effect of slagging-off is reached, meanwhile, this method is being removed
It does not need to block production when slag, so that production efficiency greatly improves.
Applied magnet is by ungulate iron core 4 and is arranged on ungulate iron core 4 and makes magnetized 6 structure of magnetic devices of ungulate iron core 4
At.Using ungulate iron core 4, and on ungulate iron core 4, setting can make its magnetized magnetic devices 6, so that guaranteeing ungulate iron core 4
While magnetic, magnetic devices 6 do not contact directly with high-temperature salt bath, so that avoiding the high temperature demagnetization of salt bath influences, and ungulate iron
Core 4 can form more uniform magnetic field between magnetic pole 2, and the magnetic line of force can also be made to form access, enhance suction.The magnetic devices 6
For permanent magnet or coil, permanent magnet can be such that ungulate iron core remains to be magnetic, and then can to adjust as needed magnetic field strong for coil
The size of degree.
Embodiment 1
The mode that applied magnet acts on salt bath is to protrude into the magnetic pole 2 of ungulate iron core 4 in salt bath 3, directly by ungulate iron
The magnetic pole 2 of core 4 is put into salt bath 3, can reach the effect of absorption clinker, knot after magnetizing ungulate iron core 4 by magnetic devices 6
Structure is simple, is convenient for operation, and at low cost.
Embodiment 2
The mode that applied magnet acts on salt bath is that salt bath is extracted out to and flowed through the magnetic pole 2 of ungulate iron core 4, specifically: it will
Salt bath 3 from contain salt bath 3 nitridation salt bath 1 in extract out and make salt bath 3 flow through one be arranged in nitrogenize salt bath 1 above water conservancy diversion
Inclined plate 8 contacts salt bath 3 with the magnetic pole 2 being arranged on flow guiding inclined plate 8.Settable pumping salt pipeline 9 is taken out 9 one end of salt pipeline and is placed in
It nitrogenizes in salt bath 1, the other end is placed in the top of flow guiding inclined plate 8, and circulating pump 10 is arranged on taking out salt pipeline 9, by salt bath from nitrogen
It is extracted out in salt dissolving bath 1 and is taken out salt pipeline 9 and flow to the removal clinker of flow guiding inclined plate 8, the salt bath for removing clinker finally flows back to nitridation
Salt bath 1, realizes the circulation of salt bath, removes the gred more thorough, and during salt bath is recycled and removed the gred, production can continuously into
Row.
It is provided with filter screen 7 on the flow guiding inclined plate 8 of 2 lower section of magnetic pole, filter screen 7 can be further ensured that slagging-off effect, avoid
Clinker after being adsorbed by magnetic pole 2 is fallen into again in nitridation salt bath 1, causes secondary pollution.
Embodiment 3
Based on the above embodiment, the ungulate iron core 4 between the magnetic pole 2 and magnetic devices 6 is equipped with cooling down packet 5,
It can avoid salt bath high temperature to be conducted at magnetic devices 6, influence the magnetic efficiency of ungulate iron core 4.
It is as described above the embodiment of the present invention.The present invention is not limited to the above-described embodiments, anyone should learn that
The structure change made under the inspiration of the present invention, the technical schemes that are same or similar to the present invention each fall within this
Within the protection scope of invention.
Claims (5)
1. a kind of method using magnetic absorption principle removal nitriding salt bath clinker, which is characterized in that acted on using applied magnet
In salt bath, clinker is adsorbed；The applied magnet is by ungulate iron core and is arranged on ungulate iron core and makes the magnetized magnetic of ungulate iron core
Property device constitute；The mode that applied magnet acts on salt bath is that salt bath is extracted out to and flowed through the magnetic pole of ungulate iron core.
2. a kind of method using magnetic absorption principle removal nitriding salt bath clinker according to claim 1, feature exist
In the magnetic devices are permanent magnet or coil.
3. a kind of method using magnetic absorption principle removal nitriding salt bath clinker according to claim 1, feature exist
In the ungulate iron core between the magnetic pole and magnetic devices is equipped with cooling down packet.
4. a kind of method using magnetic absorption principle removal nitriding salt bath clinker according to claim 1, feature exist
In by the way of salt bath is extracted out and flows through the magnetic pole of ungulate iron core method particularly includes: by salt bath from the nitrogen for containing salt bath
It is extracted out in salt dissolving bath and salt bath is made to flow through a flow guiding inclined plate being arranged in above nitridation salt bath, made salt bath and be arranged in water conservancy diversion
Magnetic pole contact on inclined plate.
5. a kind of method using magnetic absorption principle removal nitriding salt bath clinker according to claim 4, feature exist
In being provided with filter screen on the flow guiding inclined plate below magnetic pole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710093302.1A CN106917062B (en) | 2017-02-21 | 2017-02-21 | A method of nitriding salt bath clinker is removed using magnetic absorption principle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710093302.1A CN106917062B (en) | 2017-02-21 | 2017-02-21 | A method of nitriding salt bath clinker is removed using magnetic absorption principle |
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| CN106917062A CN106917062A (en) | 2017-07-04 |
| CN106917062B true CN106917062B (en) | 2019-10-08 |
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| CN112007754B (en) * | 2020-08-27 | 2022-11-11 | 合肥维信诺科技有限公司 | Pickup device |
| CN113061836A (en) * | 2021-03-15 | 2021-07-02 | 无锡双马钻探工具有限公司 | Nitriding furnace for threaded surface of drill rod head |
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| US4436627A (en) * | 1982-05-10 | 1984-03-13 | Aluminum Company Of America | Magnetic removal of impurities from molten salt baths |
| CN2079087U (en) * | 1990-02-14 | 1991-06-19 | 武汉金属压延厂 | High temp. magnetic iron removing device |
| GB9508726D0 (en) * | 1995-04-28 | 1995-06-14 | Jewess Philip J | Separation device for magnetisable particles |
| CN202909522U (en) * | 2012-11-27 | 2013-05-01 | 成都晟翔科技有限公司 | Automatic residue filtering device |
| CN203108650U (en) * | 2013-02-26 | 2013-08-07 | 浙江采云间茶业有限公司 | Device for removing tea-leaf metallic impurities by high magnets |
| CN205056207U (en) * | 2015-09-16 | 2016-03-02 | 湖北水之翼科技有限公司 | A electric magnetic shelf for getting rid of impurity in plastics |
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2017
- 2017-02-21 CN CN201710093302.1A patent/CN106917062B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4436627A (en) * | 1982-05-10 | 1984-03-13 | Aluminum Company Of America | Magnetic removal of impurities from molten salt baths |
| CN2079087U (en) * | 1990-02-14 | 1991-06-19 | 武汉金属压延厂 | High temp. magnetic iron removing device |
| GB9508726D0 (en) * | 1995-04-28 | 1995-06-14 | Jewess Philip J | Separation device for magnetisable particles |
| CN202909522U (en) * | 2012-11-27 | 2013-05-01 | 成都晟翔科技有限公司 | Automatic residue filtering device |
| CN203108650U (en) * | 2013-02-26 | 2013-08-07 | 浙江采云间茶业有限公司 | Device for removing tea-leaf metallic impurities by high magnets |
| CN205056207U (en) * | 2015-09-16 | 2016-03-02 | 湖北水之翼科技有限公司 | A electric magnetic shelf for getting rid of impurity in plastics |
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