CN107988468A - A kind of device suitable for isothermal hardening - Google Patents
A kind of device suitable for isothermal hardening Download PDFInfo
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- CN107988468A CN107988468A CN201810067205.XA CN201810067205A CN107988468A CN 107988468 A CN107988468 A CN 107988468A CN 201810067205 A CN201810067205 A CN 201810067205A CN 107988468 A CN107988468 A CN 107988468A
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- quenching
- salt bath
- work nest
- spiral propeller
- salt
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/44—Methods of heating in heat-treatment baths
- C21D1/46—Salt baths
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention provides a kind of device suitable for isothermal hardening, it is related to technical field of heat treatment equipment, solves current industry during nitrate quenching and oil hardening, salt bath designs the problem of complicated, quality control on the surface difficulty is big.The isothermal quenching unit includes salt bath, quenching work nest, flow-guiding channel, spiral propeller and conveying device, hardening media is gushed out by the pressure of spiral propeller by certain height, the hardening media be filled with actively completes heat exchange with high-temperature heat treatment material, control the speed of spiral propeller, control spring flow velocity and spring height, the cooling velocity of whole every section of quenching process can not only be adjusted, and can realize that quenching technical is combined in flexibility, using the control roller transmission speed control cool time.The problems such as present invention solves tradition quenching part and actively immerses quenching tank, goes out in the technical process of quenching tank, equipment design complexity, fluctuation of service, product surface scratch.
Description
Technical field
The present invention relates to technical field of heat treatment equipment, more particularly, to a kind of heat-treatment part or high temperature metallic material
With the device suitable for isothermal hardening that hardening media is contact heat exchange.
Background technology
Process for stabilizing of the same temperature hardening heat treatment as control material structure performance uniformity, quenches in bearing collar bainite
Fire, rolling element quenching, gear quenching, the quenching of wire rod sorbite, steel wire sorbite quenching industry have been a concern.For raising etc.
The effect of temperature quenching, each heat treatment factory and Equipment for Heating Processing manufacturing enterprise are all enterprising in the design of quenching technical and salt bath
Row system research, or even meet quenching effect by improveing hardening media.All the time, the quenching effect of heat treatment is reached
Fruit, part and high temperature metallic material are all to immerse salt bath by Transmission system, wait it is to be quenched after, then pass through transmission structure
Go out salt bath salt bath.This traditional quenching mode is very high to transmission mechanism requirement, and particularly with salt bath quenching, it is driven
Axis, gear, bearing are immersed in high temperature salt made from earth containing a comparatively high percentage of sodium chloride, and the precision of selection and making to its material proposes very high requirement,
It is always the problem of salt bath heat treatment producer is most urgent that the burn into of salt bath inner drive shafts, which is replaced,.External ground difficult to understand in this respect
Li Aixie woodss company, by designing a kind of fixture, controls the stroke of robotic arm and action, most by complicated automatically controlled program
Quenching part is passed in and out by salt bath by fixture clamping afterwards, bearing ring heat treatment industry has using case at home for this design
Example, but cost is very high, and once go wrong, maintenance is extremely difficult, and this design of most critical is for length and width
The bigger part of size is difficult to realize, and is only applied at present in miniature parts heat treatment.In addition in steel wire or wire rod
Heat-treatment quenching industry, by the way of monofilament single control and submergence roller, passes through putting before the take-up behind salt bath and heating furnace
Line forms certain tension force, and steel wire is pressed into salt bath by submergence roller inside salt bath, and the traction for passing through take-up is completed
Steel wire passes in and out salt bath, and this mode is easy to galled spots occur, and later stage drawing of the surface defect for wire rod and steel wire
It is very harmful, or even broken string just occurs in the take-up stage, bring great difficulty to production run.
The content of the invention
It is an object of the invention to provide a kind of device suitable for isothermal hardening of spring formula, by controlling hardening media
With the contact heat exchange method of heat-treatment part, during solving nitrate quenching existing in the prior art and oil hardening
The technical problem that salt bath design is complicated, surface quality of workpieces control difficulty is big, the suitable salt bath heat treatment department of the present invention or
The improvement of oil hardening workshop quenching technical, quenching equipment, and lift the heat treatment performance of quenching effect and material.
To achieve the above object, the present invention provides following technical scheme：
A kind of device suitable for isothermal hardening provided by the invention, including salt bath, quenching work nest, flow-guiding channel,
Spiral propeller and conveying device, wherein：
The salt bath and the quenching work nest are enclosed type trough body structure, and the quenching work trench bottom is opening
Structure；
The flow-guiding channel is mountain font passage, including two perpendicular accesses and one it is perpendicular engage in this profession, two perpendicular access bottoms
Connected between portion and the perpendicular bottom of engaging in this profession；
The quenching work nest is arranged in directly over the salt bath, and two perpendicular accesses are located at the quencher respectively
Make at left and right sides of groove, and at the top of the perpendicular access below the salt bath liquid level, the perpendicular top exit face institute that engages in this profession
State the open setting of quenching work trench bottom；
The spiral propeller is installed at the top of the salt bath, and the helical blade of the spiral propeller is positioned at described
In perpendicular access inner cavity, the spiral propeller can be such that the nitrate solution in the flow-guiding channel is quenched to described in work nest
Gush out；
The front and rear sides relative position of the quenching work nest is respectively arranged with workpiece entrance and workpiece outlet, the conveying
Device is arranged in the quenching work nest, and the conveying device both ends are exported from the workpiece entrance and the workpiece respectively
Place extends to outside；Reflux is both provided with the top of the salt bath of the workpiece entrance and workpiece outlet lower section
Mouthful.
Hardening media is rushed to certain altitude by the present invention by spring mode, and heat exchange occurs with high temperature metallic material, reaches
To the purpose of quick Cooling Quenching；In quenching process, pending part, wire rod, steel wire etc. are without being actively immersed in salt bath
Or quenched in oil groove, the complicated drive mechanism and immersion mechanism needed without traditional quenching technical；By in salt
Design spiral propeller in bath, since flow-guiding channel is W types, two perpendicular access Parallel Symmetrics are arranged in the both sides of salt bath,
Spiral propeller is driven using motor, thrust is produced to hardening media salt made from earth containing a comparatively high percentage of sodium chloride, hardening media is pressed under the action of thrust
In fixed flow-guiding channel, the quenching work nest that hardening media is subsequently flowed into above salt bath is interior warm with part to be heated generation
Exchange and carry out quenching treatment, quenching process is completed in quenching work nest, after hardening media pours in quenching work nest, with overflow
Mode is recycled back in the salt bath of lower section from workpiece entrance and workpiece outlet, and the hardening media flowed back to plays whole salt bath
The effect of stirring, will be above lower section salt bath temperature hardening media sufficiently stir, samming, so ensure that whole salt
The temperature uniformity of bath.
As a further improvement on the present invention, the quantity of the flow-guiding channel is multiple, all flow-guiding channel edges
The salt bath length direction is arranged side by side successively, and all perpendicular outlets engaged in this profession quench work slot bottom described in face successively
Portion is open to be set.Flow-guiding channel can arrange as needed it is several, ten, more than ten.
As a further improvement on the present invention, its width is provided with polylith partition plate, institute in the quenching work nest
State partition plate and the quenching work nest is separated into multiple quenching areas, being respectively provided with a water conservancy diversion in each quenching area leads to
Road, all partition plate bottoms are respectively positioned on above pending workpiece.
Spring formula salt bath quenching device can realize the quenching technical of flexibility, traditional salt bath quencher in the present invention
In skill only have hardening heat, two key parameters of cool time, the present invention in salt bath due to using spring formula quenching side
Formula, can be divided into several quenching areas by quenching work nest in roller-way transmission direction, can be by controlling each quenching area respectively
Each quenching area of folding form control of interior spring pump or spiral propeller is spring quenching or air-cooled, can so be realized point
Section salt bath quenching；Between every section of salt bath quenching, before, afterwards, can realize it is air-cooled, formed salt bath quenching-air-cooled-salt bath
Quenching-... quenching, or air-cooled-salt bath quenching-air-cooled-salt bath quenching-..., several quenching areas can be according to actual need
Ask and be designed；
Use salt bath quenching-air-cooled-salt bath quenching-air-cooled level Four type of cooling substantially for high-carbon steel wire：First order salt
Bath quenching is to be cooled to the temperature that pearlitic transformation occurs before phase change；Air-cooled below is the gentle incubation time of steel wire；Second
Level salt bath quenching is phase transformation section, at the same control steel wire undergo phase transition after temperature rise, complete the pearlitic transformation of steel wire；Last sky
Cold is to go out salt bath after completing phase transformation using steel wire.
Either need to realize the technique of dual phase steel quenching or QP quenching partitions for mild steel steel wire, sky can be used
Cold-salt bath quenching-air-cooled-salt bath quenching：The air-cooled first order is to ensure to separate out a certain amount of ferrite；First order salt bath quenching is
Ensure remaining paralympic generation bainite or martensite transfor mation；The air-cooled second level is tissue stabilization；Second level salt bath quenching
It is that quenching partition and performance optimization occurs.
The salt bath can also control inverter current size, adjust the flow velocity of salt bath medium to control following for high temperature salt made from earth containing a comparatively high percentage of sodium chloride
Ring multiplying power and quenching cooling rate, this point are also the places different from conventional salt bath.In addition the salt bath can be according to warm
The demand of quenching technical is handled, the adjustment of cool time is realized, realizes that control is quenched by each quenching area inside spin propeller of folding
The length of fiery section, realizes the control of cool time length.
As a further improvement on the present invention, the spiral propeller passes through height adjustment device and salt bath top
It is flexibly connected.
As a further improvement on the present invention, the spiral propeller includes driving motor, connecting rod and helical blade, described
Helical blade is arranged on the connecting rod lower end, and the driving motor is connected with the link transmission.
As a further improvement on the present invention, it is belt transmission, chain gear transmission between the driving motor and the connecting rod
Or axis transmission.The connecting rod of spiral propeller is lubricated with salt bath junction using multistage sealing ring, will not flow into lubricating oil
In salt bath.
As a further improvement on the present invention, the spiral propeller, which further includes, can adjust the helical blade rotation speed
The frequency converter of degree.By adjusting the electric current of spiral propeller upconverter, flow velocity or the circulation times of hardening media can be controlled
Rate；The motor of spiral propeller is arranged in beyond salt bath, facilitates start-stop and maintenance.
By adjusting inverter current size, the transfer rate of salt bath high-temperature medium or the spring section of salt bath are controlled
Length control quenching isothermal time, cooldown rate is controlled by controlling the flow velocity of spring hardening media, high-carbon steel steel wire or
The processing time of wire rod is within 10-60s；
As a further improvement on the present invention, the quantity of the quenching work nest is at least one, all quenching
Work nest is set gradually along the salt bath length direction, and the conveying device sequentially passes through all quenching work nests,
Each quenching work nest front and rear sides are both provided with the workpiece entrance and workpiece outlet, corresponding each workpiece
The refluxing opening is both provided with entrance and the salt bath of workpiece outlet lower section.
Conveying device is arranged in more than salt bath liquid level in the present invention, with traditional quenching unit it is maximum difference lies in,
Quenching part is not that being immersed in salt bath for active is cooled down and isothermal, but by the transfer roller above salt bath,
Guipure or steel wire tension, high temperature quenching part is conveyed into the quenching work nest on salt bath liquid level, passes through salt bath
Salt made from earth containing a comparatively high percentage of sodium chloride medium, is filled with certain height by the pressure that the spiral propeller carried produces, and can directly be carried out with quenching part cold
But heat exchange；The altitude range that high temperature salt made from earth containing a comparatively high percentage of sodium chloride is filled with is 200-500mm.Live-roller gear is through quenching work nest, in quenching work
There is no the transmission mechanism such as bearing and gear, belt in groove, the bearing of transmission shaft falls outside quenching work nest, whole salt bath
On except on refluxing opening, quenching work nest except workpiece entrance and workpiece outlet are outer, be integrally a steel construction closed.
As a further improvement on the present invention, the cooling system being arranged on the salt bath lateral wall is further included, it is described
Cooling system is air-cooled coil pipe or water cooling coil pipe.Salt bath is designed with cooling system, by the carrying heat derives of heat-treatment part,
In terms of control quenches work bath temperature degree uniformity, controlled, protected using pouring in hardening media and gushing out the flow of hardening media
Card pours in, the hardening media temperature difference that flows back is at ± 5 DEG C.
By installing cooling system on the outside of salt bath, for controlling the hardening heat of high temperature salt made from earth containing a comparatively high percentage of sodium chloride, heating power is handled zero
The heat derives salt bath that part, steel wire, wire rod carry.Cooling system can arrange air hose or water pipe in salt bath both sides, will
Heat derives, for the bigger burning optimization on line salt bath of production capacity, can design exterior cooling device, by salt pump by high temperature
Salt made from earth containing a comparatively high percentage of sodium chloride is extracted out, and the temperature control of salt bath is realized in exterior design drainer or cooling tower.
As a further improvement on the present invention, the workpiece inlet is provided with separated time comb.
When specifically used, the isothermal quenching unit is when realizing the quenching demand of high-carbon steel steel wire or wire rod, salt bath
Temperature be 450-600 DEG C, obtain shred layer sorbite tissue, by resistance wire radiant tube mode of heating inside salt bath, add
Thermal power is according to actual production capacity demand, in the case of Production for Steel Wire enterprise DV values 72, its heating power can in 300KW, for
Its heating power of 50,000 tons of the production capacity offline salt bath quenching of wire rod is 800KW, heats and is added using fused salt for the burning optimization on line of wire rod
Hot device, after salt made from earth containing a comparatively high percentage of sodium chloride fusing, salt bath, salt bath heating power 800-1000KW are transported to by salt pump by high temperature salt made from earth containing a comparatively high percentage of sodium chloride.
Hardening media is gushed out certain height by the present invention by the pressure of spiral propeller, and heat-treatment part is flowed in heating
After journey, can by conventional roller-way or other transmission modes in salt bath liquid level above by the quenching be filled with is situated between
Matter actively and high-temperature heat treatment material, completes heat exchange, by controlling the speed of spiral propeller, control spring flow velocity and
Spring height, can not only adjust the cooling velocity of whole every section of quenching process, but also can realize quenching-air-cooled-quenching, sky
The flexibility combination quenching technical such as cold-quenching-quenching, air-cooled-to quench-air-cooled, while using control roller transmission speed control
Cool time.The tradition quenching part of the invention that successfully solves actively immerses salt bath, goes out in the technical process of salt bath, if
The problems such as standby design complexity, fluctuation of service, product surface scratch, it is well suited for heat treatment department and iron and steel enterprise's burning optimization on line
The exploitation of kind and increased quality.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the cross-sectional view that the present invention is suitable for nitrate quenching or the quenching unit of oil hardening.
1, salt bath in figure；2nd, work nest is quenched；21st, workpiece entrance；3rd, flow-guiding channel；31st, access is erected；32nd, erect and engage in this profession；
4th, spiral propeller；41st, motor is driven；42nd, connecting rod；43rd, helical blade；5th, conveying device.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical scheme will be carried out below
Detailed description.Obviously, described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all on the premise of creative work is not made
Other embodiment, belongs to the scope that the present invention is protected.
In the description of the present invention, it is to be understood that term " " center ", " lateral ", " length ", " width ", " height ",
The instruction such as " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " side "
Orientation or position relationship are based on the orientation or position relationship shown in attached drawing 1, are for only for ease of the description present invention and simplification is retouched
State, rather than instruction or imply signified equipment or element there must be specific orientation, with specific azimuth configuration and operation,
Therefore it is not considered as limiting the invention.
As shown in Figure 1, it is suitable for nitrate quenching or the quenching unit of oil hardening, including salt bath the present invention provides a kind of
1st, work nest 2, flow-guiding channel 3, spiral propeller 4 and conveying device 5 are quenched, salt bath 1 and quenching work nest 2 are enclosed type
Trough body structure, 2 bottom of quenching work nest is uncovered structure；Flow-guiding channel 3 is mountain font passage, including two perpendicular accesses 31 and one
It is a it is perpendicular engage in this profession 32, connected between two perpendicular 31 bottoms of access and perpendicular 32 bottoms of engaging in this profession；Quenching work nest 2 is arranged in salt bath 1
Surface, two perpendicular accesses 31 are respectively positioned at 2 left and right sides of quenching work nest, and the perpendicular top of access 31 is located at 1 liquid level of salt bath
Hereinafter, the open setting in 32 top exit faces quenching work nest, 2 bottom of engaging in this profession is erected；Spiral propeller 4 is pushed up installed in salt bath 1
Portion, and the helical blade 43 of spiral propeller 4 is located in perpendicular 31 inner cavity of access, spiral propeller 4 can make in flow-guiding channel 3
Nitrate solution to quenching work nest 2 in gush out；The front and rear sides relative position of quenching work nest 3 is respectively arranged with workpiece entrance
21 and workpiece outlet, conveying device 5 be arranged in quenching work nest 2, and 5 both ends of conveying device are respectively from workpiece entrance 21 and work
Part exit extends to outside；Refluxing opening is both provided with positioned at the top of salt bath 1 of workpiece entrance 21 and workpiece outlet lower section.
Hardening media is rushed to certain altitude by the present invention by spring mode, and heat exchange occurs with high temperature metallic material, reaches
To the purpose of quick Cooling Quenching；In quenching process, pending part, wire rod, steel wire etc. are without being actively immersed in salt bath 1
Or quenched in oil groove, the complicated drive mechanism and immersion mechanism needed without traditional quenching technical；By in salt
Design spiral propeller 4 in bath 1, since flow-guiding channel 3 is W types, two perpendicular 31 Parallel Symmetrics of access are arranged in salt bath 1
Both sides, spiral propeller 4 is driven using motor, and thrust, the hardening media quilt under the action of thrust are produced to hardening media salt made from earth containing a comparatively high percentage of sodium chloride
Be pressed into fixed flow-guiding channel 3, hardening media subsequently flow into the quenching work nest 2 of the top of salt bath 1 with it is to be heated
Part occurs heat exchange and carries out quenching treatment, and quenching process is completed in quenching work nest 2, and hardening media pours in quenching work nest
After 2, it is recycled back in a manner of overflow from workpiece entrance 21 and workpiece outlet in the salt bath 1 of lower section, the hardening media flowed back to
Play the role of stirring to whole salt bath 1, will be above lower section 1 temperature of salt bath hardening media sufficiently stir, samming, this
Sample ensures that the temperature uniformity of whole salt bath 1.
Fig. 1 is the cross-sectional view that is looked over from left side of quenching unit, the quantity of flow-guiding channel 3 be it is multiple, it is all
Flow-guiding channel 3 is arranged side by side successively along 1 length direction of salt bath, it is all it is perpendicular engage in this profession 32 outlet face quenching work nest successively
2 bottoms are open to be set.Flow-guiding channel 3 can arrange as needed it is several, ten, more than ten.
In order to realize the quenching technical of flexibility, quenching work nest 2 is interior to be provided with polylith partition plate, partition plate along its width
Quenching work nest 2 is separated into multiple quenching areas, a flow-guiding channel 3, all partition plate bottoms are respectively provided with each quenching area
It is respectively positioned on above pending workpiece.Spring formula salt bath quenching device can realize the quenching technical of flexibility in the present invention, tradition
1 quenching technical of salt bath on only hardening heat, two key parameters of cool time, the present invention in salt bath 1 due to adopting
With the quenching mode of spring formula, quenching work nest 2 can be divided into several quenching areas in roller-way transmission direction, can passed through
It is spring quenching or sky to control each quenching area of folding form control of spring pump or spiral propeller 4 in each quenching area respectively
It is cold, it can so realize segmentation salt bath quenching；Between every section of salt bath quenching, before, afterwards, can realize it is air-cooled, formed
Salt bath quenching-air-cooled-salt bath quenching-... quenching, or air-cooled-salt bath quenching-air-cooled-salt bath quenching-..., several are quenched
Flame range can be designed according to the actual requirements；
Use salt bath quenching-air-cooled-salt bath quenching-air-cooled level Four type of cooling substantially for high-carbon steel wire：First order salt
Bath quenching is to be cooled to the temperature that pearlitic transformation occurs before phase change；Air-cooled below is the gentle incubation time of steel wire；Second
Level salt bath quenching is phase transformation section, at the same control steel wire undergo phase transition after temperature rise, complete the pearlitic transformation of steel wire；Last sky
Cold is to go out salt bath after completing phase transformation using steel wire.
Either need to realize the technique of dual phase steel quenching or QP quenching partitions for mild steel steel wire, sky can be used
Cold-salt bath quenching-air-cooled-salt bath quenching：The air-cooled first order is to ensure to separate out a certain amount of ferrite；First order salt bath quenching is
Ensure remaining paralympic generation bainite or martensite transfor mation；The air-cooled second level is tissue stabilization；Second level salt bath quenching
It is that quenching partition and performance optimization occurs.
The quenching unit by controlling inverter current size, can adjust the flow velocity of salt bath medium to control high temperature salt made from earth containing a comparatively high percentage of sodium chloride
Circulating ratio and quenching cooling rate, this point is also the places different from conventional salt bath 1.In addition the salt bath 1 can be with
According to the demand of heat treatment quenching process, the adjustment of cool time is realized, realized by each quenching area inside spin propeller 4 of folding
The length of control quenching section, realizes the control of cool time length.
Spiral propeller 4 is connected by height adjustment device with 1 top movable of salt bath.Height adjustment device is using existing
Product in technology, can realize that the height of spiral propeller 4 is adjusted, such as telescoping hydraulic cylinder.
Preferably, spiral propeller 4 includes driving motor 41, connecting rod 42 and helical blade 43, helical blade 43 to be arranged on
42 lower end of connecting rod, driving motor 41 are sequentially connected with connecting rod 42.Drive and passed between motor 41 and connecting rod 42 for belt transmission, sprocket wheel
The transmission of dynamic or axis.The connecting rod 42 of spiral propeller 4 is lubricated with 1 junction of salt bath using multistage sealing ring, will will not be lubricated
Oil stream enters in salt bath 1.Spiral propeller 4 further includes the frequency converter that can adjust 43 rotary speed of helical blade.Pass through adjusting
The electric current of 4 upconverter of spiral propeller, can control the flow velocity or circulating ratio of hardening media；The electricity of spiral propeller 4
Machine is arranged in beyond salt bath 1, facilitates start-stop and maintenance.By adjusting inverter current size, 1 high-temperature medium of salt bath is controlled
Transfer rate or salt bath 1 spring segment length control quenching isothermal time, by the flow velocity for controlling spring hardening media
To control cooldown rate, the processing time of high-carbon steel steel wire or wire rod is within 10-60s；
As optional embodiment, the quantity of quenching work nest 2 is at least one, all quenching work nest 2 along salt
1 length direction of bath is set gradually, and conveying device 5 sequentially passes through all quenching work nests 2, before and after each quenching work nest 2
Both sides are both provided with workpiece entrance 21 and workpiece outlet, and corresponding each workpiece entrance 21 and workpiece are exported on the salt bath 1 of lower section
It is both provided with refluxing opening.Conveying device 5 is arranged in more than 1 liquid level of salt bath in the present invention, with traditional quenching unit maximum
Difference lies in quenching part is not that being immersed in salt bath 1 for active is cooled down and isothermal, but passes through the top of salt bath 1
Transfer roller, guipure or steel wire tension, by high temperature quenching part convey into the quenching work nest 2 on 1 liquid level of salt bath
Salt made from earth containing a comparatively high percentage of sodium chloride medium, is filled with certain height by pressure interior, that the spiral propeller 4 carried by salt bath 1 produces, can directly with
Quenching part carries out cooling heat exchange；The altitude range that high temperature salt made from earth containing a comparatively high percentage of sodium chloride is filled with is 200-500mm.Live-roller gear passes through quenching work
Groove 2, does not have the transmission mechanism such as bearing and gear, belt in quenching work nest 2, and the bearing of transmission shaft falls in quenching work nest
Outside 2, except in addition to workpiece entrance 21 and workpiece export, being integrally on refluxing opening, quenching work nest 2 on whole salt bath 1
The steel construction of one closing.
In order to ensure temperature uniformity in salt bath 1, the cooling system being arranged on 1 lateral wall of salt bath is further included, it is cold
But system is air-cooled coil pipe or water cooling coil pipe.Salt bath 1 is designed with cooling system, by the carrying heat derives of heat-treatment part,
In terms of control quenches 2 temperature uniformity of work nest, controlled, protected using pouring in hardening media and gushing out the flow of hardening media
Card pours in, the hardening media temperature difference that flows back is at ± 5 DEG C.
By installing cooling system in the outside of salt bath 1, for controlling the hardening heat of high temperature salt made from earth containing a comparatively high percentage of sodium chloride, heating power is handled zero
The heat derives salt bath 1 that part, steel wire, wire rod carry.Cooling system can arrange air hose or water pipe in 1 both sides of salt bath,
By heat derives, for the bigger burning optimization on line salt bath 1 of production capacity, exterior cooling device can be designed, will by salt pump
High temperature salt made from earth containing a comparatively high percentage of sodium chloride is extracted out, and the temperature control of salt bath 1 is realized in exterior design drainer or cooling tower.
Quenching treatment is carried out to steel wire or wire rod for convenience, separated time comb is provided with workpiece entrance 21.In steel wire or
During the salt bath quenching of sub-thread wire rod, the design of the submergence roller of traditional lead bath heat treatment process is eliminated, solves lead bath due to close
The shortcomings that degree is high, and poor fluidity can not realize spring contact heat-exchanging.The heat treatment of the salt bath of steel wire or sub-thread wire rod uses unwrapping wire
End and the tension force at take-up end, set separated time to comb, load-bearing wires is simultaneously each stock steel wire wire rod in the workpiece entrance 21 of salt bath 1
Realize separation, steel wire can be designed within 56 that wire rod can be within 24 strands.Each steel wire or wire rod are parallel through salt
High temperature salt made from earth containing a comparatively high percentage of sodium chloride is filled with the quenching work full of the whole top of salt bath 1 by bath quenching work nest 2, the spiral propeller 4 of salt bath 1
Groove 2, and submerge each steel wire or wire rod, at the same the high temperature salt made from earth containing a comparatively high percentage of sodium chloride after exchanging heat from workpiece entrance 21 and workpiece outlet return under
The salt bath 1 of side, while also achieve stirring and the temperature equal control of high temperature salt made from earth containing a comparatively high percentage of sodium chloride.Separated time comb uses production of the prior art
Product.
When specifically used, the isothermal quenching unit is when realizing the quenching demand of high-carbon steel steel wire or wire rod, salt bath 1
Temperature be 450-600 DEG C, obtain shred layer sorbite tissue, by resistance wire radiant tube mode of heating inside salt bath 1, add
Thermal power is according to actual production capacity demand, in the case of Production for Steel Wire enterprise DV values 72, its heating power can in 300KW, for
Its heating power of 50,000 tons of the production capacity offline salt bath quenching of wire rod is 800KW, heats and is added using fused salt for the burning optimization on line of wire rod
Hot device, after salt made from earth containing a comparatively high percentage of sodium chloride fusing, salt bath 1,1 heating power 800-1000KW of salt bath are transported to by salt pump by high temperature salt made from earth containing a comparatively high percentage of sodium chloride.
Hardening media after spring enters the quenching work nest 2 of the top of salt bath 1, the axis of the transmission shaft in conveying device 5
Seat and bearing, gear are all disposed within outside salt bath 1, are not contacted with high temperature salt made from earth containing a comparatively high percentage of sodium chloride, transmission shaft uses heat-resistance stainless steel, transmission shaft
Inside can be with ventilating and cooling；Be heat-treated for individual wire and wire rod, transmission shaft can not be used to convey, directly by unwrapping wire and
Takeup tension, the carrying that the separated time axis and separated time exported by the workpiece entrance 21 and workpiece that quench work nest 2 is combed realize each
Steel wire and wire rod, which come in and go out, quenches work nest 2.
The hardening media be filled with, after being quenched with hot parts, passes through 2 liang of the quenching work nest of the top of salt bath 1
The opening at end, overflows back salt bath 1, while the hardening media and the spring of spiral propeller 4 to flow back realizes the circulation of salt made from earth containing a comparatively high percentage of sodium chloride, rises
To the effect of stirring, 1 temperature of salt bath keeps uniform；On the roller transmission direction of conveying device 5, the cooling of whole spring by every
Plate is divided into several spring cooling section i.e. quenching areas, passes through folding spring cooling section spiral propeller 4, it is possible to achieve single formula salt
Quenching technical mode is bathed, can also realize the intermittent stage-hardening control of quenching-air-cooled-quenching.
Hardening media is gushed out certain height by the present invention by the pressure of spiral propeller, and heat-treatment part is flowed in heating
After journey, can by conventional roller-way or other transmission modes in salt bath liquid level above by the quenching be filled with is situated between
Matter actively and high-temperature heat treatment material, completes heat exchange, by controlling the speed of spiral propeller, control spring flow velocity and
Spring height, can not only adjust the cooling velocity of whole every section of quenching process, but also can realize quenching-air-cooled-quenching, sky
The flexibility combination quenching technical such as cold-quenching-quenching, air-cooled-to quench-air-cooled, while using control roller transmission speed control
Cool time.The tradition quenching part of the invention that successfully solves actively immerses salt bath, goes out in the technical process of salt bath, if
The problems such as standby design complexity, fluctuation of service, product surface scratch, it is well suited for heat treatment department and iron and steel enterprise's burning optimization on line
The exploitation of kind and increased quality.
Embodiment 1：
The present invention is used in deep processing heat treatment industry, using the quenching unit, using offline sorbite salt bath quenching
Production, completes the middle silk sorbite quenching of high-quality bridge rope steel wire gren rod and cutting steel wire, its sorbite rate reaches 95%,
The tensile strength fluctuation of wire rod reaches ± 20Mpa, and sorbite piece interlamellar spacing is controlled in 80-120nm, and meets deep processing user's
It is required that the quenching unit consists of：
A, spring formula salt bath is closed steel construction, is provided with 12 groups of spiral propellers and guiding device, salt bath flute length
Spend 10m, width 2.7m, depth 1.5m；
B, spiral propeller produces pressure, and hardening media is pressed into flow-guiding channel, gushes out quenching tank liquid level 500mm；
C, the hardening media be filled with more than salt bath liquid level quenching work nest in roller-way on hot parts, metal
Material, and complete quenching process；
Spiral propeller is provided with frequency converter, adjust high temperature salt made from earth containing a comparatively high percentage of sodium chloride flow velocity and spring height, salt made from earth containing a comparatively high percentage of sodium chloride temperature 500 DEG C it
It is interior；
Hardening media after spring enters the quenching work nest above salt bath, quenches work well width 1.3m, height
Outside 500mm, output and drive mechanism arrangement salt bath；
Salt bath transfer rate 3.5m/min, the cool time is in 180s.The hardening media be filled with, carries out with hot parts
After quenching, exported by the workpiece entrance and workpiece at the quenching work nest both ends above salt bath, overflow returns to salt bath, at the same time
The circulation that the hardening media of reflux and the high temperature salt made from earth containing a comparatively high percentage of sodium chloride of spring are formed, plays the role of stirring, keeps salt bath temperature uniform, salt
Bath temperature undulated control is at ± 3 DEG C；In wire rod transmission direction, using single formula salt bath quenching mode.
Embodiment 2：
The present invention is used in high line burning optimization on line production, is arranged in after Laying head, using the quenching unit, is replaced
For traditional stelmor air cooling equipment, exploitation bridge rope steel wire gren rod, prestressed wire rod, spring steel wire rod, cord steel
Wire rod, its sorbite rate reach 95%, and the tensile strength fluctuation of wire rod reaches ± 20Mpa, sorbite lamella spacing undulated control
In ± 20nm, and meet the requirement of deep processing user, which consists of：
A, artesian spring type hardening bath is closed steel construction, is provided with 12 groups of spiral propellers and guiding device, salt bath flute length
Spend 40m, width 2.7m, depth 2m；
B, spiral propeller produces pressure, and hardening media is pressed into flow-guiding channel, gushes out salt bath liquid level 500mm；
C, the hardening media be filled with quenched more than salt bath liquid level in work nest on roller-way with hot parts, metal material
Contact, and complete quenching process；
Spiral propeller is provided with frequency converter, adjust high temperature salt made from earth containing a comparatively high percentage of sodium chloride flow velocity and spring height, salt made from earth containing a comparatively high percentage of sodium chloride temperature 550 DEG C it
It is interior；
Hardening media after spring enters the quenching work nest above salt bath, quenches work well width 1.4m, height
Outside 600mm, output and drive mechanism arrangement salt bath；
Salt bath transfer rate 0.7m/s, the cool time is in 50s.The hardening media be filled with, quenches with hot parts
After fire, exported by the workpiece entrance and workpiece at the quenching work nest both ends above salt bath, overflow returns to salt bath, returns at the same time
The circulation that the hardening media of stream and the high temperature salt made from earth containing a comparatively high percentage of sodium chloride of spring are formed, plays the role of stirring, keeps salt bath temperature uniform, salt bath
Bath temperature degree undulated control is at ± 3 DEG C；In wire rod transmission direction, using single formula salt bath quenching mode.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (8)
- A kind of 1. device suitable for isothermal hardening, it is characterised in that：Lead to including salt bath (1), quenching work nest (2), water conservancy diversion Road (3), spiral propeller (4) and conveying device (5), wherein：The salt bath (1) and the quenching work nest (2) are enclosed type trough body structure, described quenching work nest (2) bottom For uncovered structure；The flow-guiding channel (3) is mountain font passage, including two perpendicular accesses (31) and one perpendicular engage in this profession (32)；The quenching work nest (2) is arranged in directly over the salt bath (1), and two perpendicular accesses (31) are respectively positioned at described Quench at left and right sides of work nest (2), and at the top of the perpendicular access (31) below the salt bath (1) liquid level, it is described to erect out The open setting in work nest (2) bottom is quenched described in road (32) top exit face；The spiral propeller (4) is installed at the top of the salt bath (1), and the helical blade of the spiral propeller (4) (43) it is located in perpendicular access (31) inner cavity, the spiral propeller (4) can make the salt made from earth containing a comparatively high percentage of sodium chloride in the flow-guiding channel (3) Solution is gushed out into the quenching work nest (2)；The front and rear sides relative position of the quenching work nest (2) is respectively arranged with workpiece entrance (21) and workpiece outlet, described Conveying device (5) is arranged in the quenching work nest (2), and the conveying device (5) both ends are respectively from the workpiece entrance (21) and the workpiece exit extends to outside；The salt positioned at the workpiece entrance (21) and workpiece outlet lower section Refluxing opening is both provided with the top of bath (1).
- 2. the device according to claim 1 suitable for isothermal hardening, it is characterised in that：The number of the flow-guiding channel (3) Measure to be multiple, all flow-guiding channels (3) are arranged side by side successively along the salt bath (1) length direction, and all is described The perpendicular outlet for engaging in this profession (32) quenches that work nest (2) bottom is open to be set described in face successively.
- 3. the device according to claim 1 suitable for isothermal hardening, it is characterised in that：The spiral propeller (4) is logical Height adjustment device is crossed to be connected with the salt bath (1) top movable.
- 4. the device according to claim 3 suitable for isothermal hardening, it is characterised in that：Spiral propeller (4) bag Include driving motor (41), connecting rod (42) and helical blade (43), the helical blade (43) and be arranged on the connecting rod (42) lower end, The driving motor (41) is sequentially connected with the connecting rod (42).
- 5. the device according to claim 4 suitable for isothermal hardening, it is characterised in that：The driving motor (41) and institute State between connecting rod (42) as belt transmission, chain gear transmission or axis transmission.
- 6. the device according to claim 5 suitable for isothermal hardening, it is characterised in that：The spiral propeller (4) is also Frequency converter including the helical blade (43) rotary speed can be adjusted.
- 7. the device suitable for isothermal hardening according to any one of claim 1-6, it is characterised in that：The quencher The quantity for making groove (2) is at least one, and all quenching work nests (2) set successively along the salt bath (1) length direction Put, the conveying device (5) sequentially passes through all quenching work nests (2), two before and after each quenching work nest (2) Side is both provided with the workpiece entrance (21) and workpiece outlet, and corresponding each workpiece entrance (21) and the workpiece go out The refluxing opening is both provided with the salt bath (1) below mouthful.
- 8. the device according to claim 7 suitable for isothermal hardening, it is characterised in that：Further include and be arranged on the salt bath Cooling system on groove (1) lateral wall, the cooling system are air-cooled coil pipe or water cooling coil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810067205.XA CN107988468A (en) | 2018-01-23 | 2018-01-23 | A kind of device suitable for isothermal hardening |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810067205.XA CN107988468A (en) | 2018-01-23 | 2018-01-23 | A kind of device suitable for isothermal hardening |
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| CN201810067205.XA Pending CN107988468A (en) | 2018-01-23 | 2018-01-23 | A kind of device suitable for isothermal hardening |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111440940A (en) * | 2020-04-10 | 2020-07-24 | 中国重型机械研究院股份公司 | Wire rod fused salt roll table box body large deformation self-adaptation sealing device |
| CN111440939A (en) * | 2020-04-10 | 2020-07-24 | 中国重型机械研究院股份公司 | High-temperature large-deformation elastic sealing device for wire rod molten salt roller way box body |
| CN114959243A (en) * | 2022-05-31 | 2022-08-30 | 张家港宏昌钢板有限公司 | Wire rod heat treatment device |
| CN115287432A (en) * | 2022-06-15 | 2022-11-04 | 北京勤泽鸿翔冶金科技有限公司 | Off-line molten fluid isothermal quenching production process method |
| CN117488030A (en) * | 2023-12-21 | 2024-02-02 | 盐城市鑫纬嘉新能源科技有限公司 | Ductile iron isothermal quenching cooling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111440940A (en) * | 2020-04-10 | 2020-07-24 | 中国重型机械研究院股份公司 | Wire rod fused salt roll table box body large deformation self-adaptation sealing device |
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| CN115287432A (en) * | 2022-06-15 | 2022-11-04 | 北京勤泽鸿翔冶金科技有限公司 | Off-line molten fluid isothermal quenching production process method |
| CN117488030A (en) * | 2023-12-21 | 2024-02-02 | 盐城市鑫纬嘉新能源科技有限公司 | Ductile iron isothermal quenching cooling device |
| CN117488030B (en) * | 2023-12-21 | 2024-03-19 | 盐城市鑫纬嘉新能源科技有限公司 | Ductile iron isothermal quenching cooling device |
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