CN109929974A - A kind of liquid bismuth alloy quenching unit and quenching technical - Google Patents
A kind of liquid bismuth alloy quenching unit and quenching technical Download PDFInfo
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- CN109929974A CN109929974A CN201910152407.9A CN201910152407A CN109929974A CN 109929974 A CN109929974 A CN 109929974A CN 201910152407 A CN201910152407 A CN 201910152407A CN 109929974 A CN109929974 A CN 109929974A
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- 238000010791 quenching Methods 0.000 title claims abstract description 127
- 230000000171 quenching effect Effects 0.000 title claims abstract description 126
- 239000007788 liquid Substances 0.000 title claims abstract description 58
- 229910001152 Bi alloy Inorganic materials 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 117
- 239000010959 steel Substances 0.000 claims abstract description 117
- 238000001816 cooling Methods 0.000 claims abstract description 71
- 238000010438 heat treatment Methods 0.000 claims abstract description 45
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 25
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000004804 winding Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000013589 supplement Substances 0.000 claims abstract description 3
- 239000007921 spray Substances 0.000 claims description 31
- 230000017525 heat dissipation Effects 0.000 claims description 30
- 229910002804 graphite Inorganic materials 0.000 claims description 11
- 239000010439 graphite Substances 0.000 claims description 11
- 239000002918 waste heat Substances 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000010935 stainless steel Substances 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 10
- 239000002826 coolant Substances 0.000 claims description 7
- 229910001566 austenite Inorganic materials 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 6
- 239000011490 mineral wool Substances 0.000 claims description 6
- 239000010802 sludge Substances 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000000110 cooling liquid Substances 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000005192 partition Methods 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 229910000734 martensite Inorganic materials 0.000 description 14
- 238000000034 method Methods 0.000 description 8
- 230000009466 transformation Effects 0.000 description 8
- 238000005496 tempering Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 229910001338 liquidmetal Inorganic materials 0.000 description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 235000010333 potassium nitrate Nutrition 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 235000010288 sodium nitrite Nutrition 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 230000003247 decreasing effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
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- 230000007704 transition Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Abstract
The invention belongs to quenching unit technical fields, more particularly to a kind of liquid bismuth alloy quenching unit, including hai roll wheel, winding wheel, steel band, the heating furnace and glowing furnace being heat-treated to steel band are equipped between hai roll wheel and winding wheel, heating furnace and glowing furnace there are high and low fall and are in totally-enclosed shape, glowing furnace is in inverted trapezoidal, and glowing furnace includes the first quenching box and the second quenching box separated by partition；First quenching box includes the liquid bismuth being stored in the first quenching box and is located at outside the first quenching box, the heating plate for adjusting liquid bismuth temperature, and the two sides of the steel band of the first quenching box are separately provided for the hollow top board of supplement heat rejecter steel band and are used to support the lower platen of steel band.A kind of liquid bismuth alloy quenching unit combination water cooling disclosed by the invention and misting cooling realize the quenching to steel band, and non-environmental-pollution, equipment is simple, high production efficiency, surface smoothness and flatness are all good.The invention also discloses a kind of quenching technicals of liquid bismuth alloy quenching unit.
Description
Technical field
The present invention relates to a kind of liquid bismuth alloy quenching unit and quenching technicals.Belong to quenching unit technical field.
Background technique
Quenching is the cooling heat treatment for obtaining martensite or bainite structure in a suitable manner after workpiece heating austenitizing
Technique.It is most common to have water hardening, oil quenchinng, dry quenching etc..The heat treatment process of Q-tempering generallys use steel band
Continuous quenching tempering equipment, the equipment are made of quenching heating furnace, quenching cooler, tempering heating furnace three parts.Steel band exists
In heat resisting pipe, 860~920 DEG C are heated to by quenching heating furnace, tissue is by ferrite+pearlite transformation at Ovshinsky
Body tissue, then the martensitic structure of high rigidity is obtained in the case where the pressure of quenching cooler is cooling, pass through in heat resisting pipe later
420~520 DEG C of tempering heating furnace processing, can be obtained the tempered sorbite tissue of high resiliency and high-wear resistance.
Currently, quenching cooler use Quenching press, steel band from quenching heating furnace come out after, be directly entered Quenching press into
Row cooling, obtains martensitic structure.Quenching press is by fluting and two pressure plates up and down with holes form, and cooling medium is generally
Oil.Enter tempering heating furnace after quenching and carry out tempering, makes steel band A that there is elasticity and certain hardness.In production process, quench
The distance between two pressure plates, the depth of parallelism, the size of oil pressure etc. have a great impact to the deformation of steel band quenching to fiery press up and down.
In order to reduce the quenching distortion of steel band, quenching can only be caused to be difficult to realize certainly by being adjusted at any time to above-mentioned parameter by hand
Dynamicization.
When steel band quenches, cooling velocity has to be larger than critical cooling rate VC, can just avoid the formation of pearlite etc. and not need
Tissue.When cooling temperature is lower than martensite transformation temperature Ms or less, austenite is just changed into martensite, obtains martensite group
It knits.In the process, heat-treatment distortion is mainly generated by structural stress and thermal stress, and thermal stress is by High-temperature cooling to martensite
Caused when certain temperature of transition temperature Ms or less, structural stress is from austenite to generation when martensite transfor mation.If cooling procedure
In, martensite transformation temperature Ms certain temperature below is cooled to the speed greater than VC first, then reduces cooling velocity, then both
Martensite can be obtained, deformation can also be reduced, here it is the principles of double quenching.In production practices, have frequently with two kinds
The liquid of different cooling capacities, such as the fast water of cooling velocity and the slower oil of cooling velocity.But when due to steel band cooling
It is transformed into martensite, therefore the hardness of steel band at this time is very high, it is very crisp, when steel band is slightly bent, will be broken, therefore, it is difficult to
Realize bending necessary to automated production.
Again since the martensite transformation temperature Ms point of steel band is generally at 200~250 DEG C, cooling velocity to be greater than critical
Cooling velocity VC, and it is cooled to certain temperature of martensite transformation temperature Ms or more, it is necessary to use suitable cooling medium.Heat treatment
In common fast cooling medium have water, oil, a low melting point fused salt, when isothermal hardening, also uses liquid metal sometimes.Due to aqueous solution
Low boiling point, temperature is generally within 100 DEG C when use, and the flash-point of oil is lower, even if high temperature is oily, also can only using temperature
At 250 DEG C or so, it still can not meet above-mentioned technique requirement.
In heat treatment technics, also cooling medium can be used as there are two types of liquid, that is, molten salt bath and liquid metal.This two
Kind liquid can stablize use in 120 DEG C~1200 DEG C of wide scope.The molten salt bath composition of previous process requirement can be met
Be:: the NaNO2 sodium nitrite of 45wt% and the potassium nitrate KNO3 of 55wt%, fusing point be 137 DEG C, using temperature 150 DEG C~
500℃.But molten salt bath has certain corrosivity to equipment, therefore better choice is low melting point and inertia while and steel
There is no the liquid metals, such as Pb-Bi alloy of reactions such as metallurgy etc. for iron.Liquid metal has the excellent capacity of heat transmission, can
Temperature of steel strips is cooled to rapidly identical as own temperature, therefore can be more than critical cooling rate VC, thus avoid it is unfavorable
Structural transformation, but lead Pb can cause serious pollution to environment.
In conclusion of the existing technology in order to solve the problems, such as, need to invent a kind of combination water cooling and spraying cold at present
But the quenching to steel band is realized, the first hollow axle roller in liquid bismuth non-environmental-pollution, the second quenching box in the first quenching box
With the liquid bismuth alloy quenching unit that the second hollow axle roller equipment is simple, high production efficiency, surface smoothness and flatness are all good
And quenching technical.
Summary of the invention
The present invention is directed to drawback existing in the prior art, provides a kind of liquid bismuth alloy quenching unit and quenching technical,
The liquid bismuth alloy quenching unit combination water cooling and misting cooling realize the quenching to steel band, the liquid bismuth in the first quenching box without
The first hollow axle roller and the second hollow axle roller equipment in environmental pollution, the second quenching box be simple, high production efficiency, any surface finish
Degree and all good liquid bismuth alloy quenching unit of flatness.
In order to solve the above-mentioned technical problem, the technical solution of the present invention is as follows:
A kind of liquid bismuth alloy quenching unit, including hai roll wheel, winding wheel, the steel band for connecting hai roll wheel and winding wheel, institute
State the heating furnace and glowing furnace for being successively arranged between hai roll wheel and winding wheel and being heat-treated to steel band, the heating furnace and quenching
Furnace is there are high and low fall and is in totally-enclosed shape, and the glowing furnace is in inverted trapezoidal, and the glowing furnace includes the separated by partition
One quenching box and the second quenching box；
First quenching box includes the liquid bismuth being stored in first quenching box and is located at first quenching box
Outside, it for adjusting the heating plate of liquid bismuth temperature, is separately provided for across the two sides of the steel band of first quenching box auxiliary
It helps the hollow top board of cooling steel band and is used to support the lower platen of steel band；
The top board is the metal of good heat conductivity, is provided with multiple high pressures towards the steel band in the top board
Spray head and the import for cooling down liquid for giving high-pressure nozzle；
Second quenching box includes the first hollow axle roller and the second hollow roll for being located at the steel band or more two sides
Axis is stored with a small amount of liquid bismuth in first hollow axle roller, is provided in second hollow axle roller multiple towards described
The cooling spray head of steel band.First hollow axle roller and the second hollow axle roller use copper pipe, and copper is the good conductor of heat, so that it may be passed through
Heat transmitting carries out misting cooling to steel band in cooling spray head, moment fixed point cooling is realized, compared with the more fast quickly cooling of water-cooling pattern
But, the heat of steel band is transmitted to roll shaft and is transmitted to cooling spray again, and cooling spray constantly takes away the heat of steel band, makes the temperature of steel band
Degree reduces rapidly.
The lower platen includes sequentially connected graphite plate from top to bottom, heat dissipation column assembly and rock wool board.
Further, thermal column of the heat dissipation column assembly by three or more, with side connecting plate and lower end connecting plate
Successively there is pressure to be assembled to form, the gap between the two neighboring thermal column forms heat dissipation circulation canal.
Further, the thermal column is hollow structure, and the thermal column uses the lower stainless steel tube of thermal coefficient.
Heat dissipation circulation canal in heat dissipation column assembly is distributed the heat to get off is transmitted on graphite plate, in heat dissipation circulation canal
Drop heat treatment is carried out, using the lower stainless steel tube of thermal coefficient (thermal coefficient of stainless steel is only 16W/mK), and is arranged
Multiple thermal columns increase the length of heat dissipation circulation canal, control the heat transmitted downwards, have good heat sinking function,
The rock wool board of heat dissipation column assembly bottom end setting guarantees the heat of entire lower platen not to the liquid being stored in first quenching box
Transmitting in state bismuth, the graphite plate excellent thermal conductivity of heat dissipation column assembly top setting, skin-friction coefficient is small, fusing point is high, has
The heat of steel band can quickly be passed to heat dissipation column assembly by deformability.
Further, the steel band turns to 4 nodes peace that low level glowing furnace turns again to winding wheel by high-level heating furnace
Equipped with the guide post for being contacted with the steel band and the steel band being driven steadily to operate.
Further, the guide post at each node is set as three.The setting of multiple guide posts guarantees that steel band is flat
Steady operating.
Further, the cooling medium in the high-pressure nozzle and cooling spray head is cooling water and cooling spray respectively.
Further, the top board is connected by a telescopic device with first quenching box upper end.Telescopic device is
Conventional telescopic rod.
Further, the glowing furnace top is provided with a waste heat comb being connected with sludge dryer, the waste heat row
Pipe is connected with air blower, and the waste heat in glowing furnace is used for sludge drying by the discharge of waste heat comb and realizes heat recovery.
A kind of quenching technical of liquid bismuth alloy quenching unit, comprising the following steps:
Step 1: heating in heating furnace to steel band, it is made to be changed into austenite structure；
Step 2: the steel band after heating is passed sequentially through the first quenching box and under the drive of hai roll wheel and winding wheel
Two quenching boxes carry out classification cooling；
Step 3: the first quenching box is stored with liquid bismuth, it will warm up the steel band of austenitizing with certain speed and immerse liquid
In state bismuth, the high-pressure nozzle in the top board of steel band upper end setting carries out cooling of spraying water with high pressure towards steel band, by the heat of steel band
It is taken away by cold water, the heat dissipation column assembly in the lower platen of steel band lower end setting is distributed the heat to get off is transmitted on graphite plate,
Heat dissipation circulation canal carries out drop heat treatment；
Step 4: being located at the first hollow axle roller on the upside of the steel band in the second quenching box passes through the liquid bismuth of storage in it
It realizes cooling, the second hollow axle roller on the downside of the steel band is located in the second hollow axle roller and passes through the cooling spray head being arranged inside
High-pressure fog cooling is carried out towards steel band, the heat of steel band is taken away.
The present invention have the characteristics that it is following and the utility model has the advantages that
A kind of liquid bismuth alloy quenching unit of the present invention has innovated a kind of new quenching mode, and by its with it is existing
Process for quenching combine, realize that mist is cold and water cooling, the heat of steel band passed through into close contact using the principle of solid thermal conduction
High thermal conductivity solid pass to the cooling water and cooling spray of flowing, by the cooling water that flows and cooling spray by the continuous band of heat
It walks, so that the temperature of steel band is rapidly decreased to martensite transformation temperature Ms hereinafter, the tissue of steel band is changed into geneva by austenite
Body achievees the purpose that quenching, is quenched using the device, production cost can be made to reduce；Clean manufacturing can be achieved, without environment
Pollution, is conducive to workers ' health；The first quenching box and second separated by partition that wholly liquid state bismuth alloy quenching unit includes
Quenching box is continuous quenching, i.e. the quenching of Edge of Steel Strip movement side, and compared with slack quenching, production efficiency improves a lot, and first quenches
The hollow lower platen of setting in fire-box also has heat spreading function.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of a kind of liquid bismuth alloy quenching unit of the present invention and quenching technical；
Fig. 2 is the structural schematic diagram of lower platen in a kind of liquid bismuth alloy quenching unit of the present invention and quenching technical.
In figure, 1- hai roll wheel；2- winding wheel；3- steel band；4- heating furnace；5- guide post；6- high-pressure nozzle；7- import；8-
Top board；The first hollow axle roller of 9-；10- liquid bismuth；11- cooling spray head；The second hollow axle roller of 12-；13- glowing furnace；Under 14-
Pressing plate；15- heating plate；16- graphite plate；The side 17- connecting plate；18- heat dissipation column assembly；19- thermal column；The lower end 20- connecting plate；
21- rock wool board.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing.It should be noted that for
The explanation of these embodiments is used to help understand the present invention, but and does not constitute a limitation of the invention.In addition, disclosed below
The each embodiment of the present invention involved in technical characteristic can be combined with each other as long as they do not conflict with each other.
A kind of structural schematic diagram of liquid bismuth alloy quenching unit shown in referring to Figures 1 and 2 and the structure of lower platen are shown
It is intended to.A kind of liquid bismuth alloy quenching unit, including hai roll wheel 1, winding wheel 2, the steel band for connecting hai roll wheel and winding wheel 2, institute
State the heating furnace 4 and glowing furnace 13 for being successively arranged between hai roll wheel 1 and winding wheel 2 and being heat-treated to steel band 3, the heating furnace
4 and glowing furnace 13 there are high and low fall and be in totally-enclosed shape, the glowing furnace 13 is in inverted trapezoidal, and the steel band 3 is by high-level heating
Furnace 4, which turns to low level glowing furnace 13 and turns again to be equipped at 4 nodes of winding wheel 2, to be contacted with the steel band 3 and drives the steel
The guide post 5 steadily operated with 3, the guide post 5 at each node are set as three.The setting of multiple guide posts 5 guarantees
Steel band 3 steadily operates.
The glowing furnace 13 includes the first quenching box and the second quenching box separated by partition；
First quenching box includes the liquid bismuth being stored in first quenching box and is located at first quenching box
Outside, for adjusting the heating plate 14 of liquid bismuth temperature, the two sides across the steel band 3 of first quenching box are separately provided for
The hollow top board 8 of supplement heat rejecter steel band 3 and the hollow lower platen 14 for being used to support steel band；
The top board 8 is the metal of good heat conductivity, is provided with multiple height towards the steel band in the top board 8
Press spray head 6 and the import 7 for giving the cooling liquid of high-pressure nozzle 6；
Second quenching box include be located at about 3 two sides of steel band the first hollow axle roller 9 and second it is hollow
Roll shaft 12 is stored with a small amount of liquid bismuth 10 in first hollow axle roller 9, is provided in second hollow axle roller 12 multiple
Cooling spray head 11 towards the steel band 3.First hollow axle roller 9 and the second hollow axle roller 12 use copper pipe, and copper is the good of heat
Conductor, so that it may logical heat transfer carries out misting cooling towards steel band 3 in cooling spray head 11, realizes moment fixed point cooling, compared with
Water-cooling pattern is more quickly cooled down, and the heat of steel band 3 is transmitted to roll shaft and is transmitted to cooling spray again, and cooling spray is constantly steel band 3
Heat take away, reduce rapidly the temperature of steel band 3.
The lower platen 14 includes sequentially connected graphite plate 16 from top to bottom, heat dissipation column assembly 18 and rock wool board 21.Institute
State heat dissipation column assembly 18 successively has press fitting to match by three or more, the thermal column 19 with side connecting plate 17 and lower end connecting plate 20
It is formed, the gap between the two neighboring thermal column 19 forms heat dissipation circulation canal.
The thermal column 19 is hollow structure, and the thermal column 19 uses the lower stainless steel tube of thermal coefficient.It is described to dissipate
Plume 19 is stainless steel tube, and thermal column 19 is equipped by three stainless steel tube group weldering processing, and three stainless steel tubes assemble
Assembly side connecting plate 17 and lower end connecting plate 20 and the thermal column 19 pass through hot charge practice assembly.The lower end connection
Plate 20 is closed structure.
Heat dissipation circulation canal in heat dissipation column assembly 18 is distributed the heat to get off is transmitted on graphite plate 16, is recycled in heat dissipation
Channel carries out drop heat treatment, using the lower stainless steel tube of thermal coefficient (thermal coefficient of stainless steel is only 16W/mK), and
Multiple thermal columns 19 are set, increases the length of heat dissipation circulation canal, controls the heat transmitted downwards, there is heat dissipation well
Function, the rock wool board 21 of heat dissipation 18 bottom end of column assembly setting guarantee that the heat of entire lower platen 14 is not quenched to being stored in described first
Transmitting in liquid bismuth in fire-box, 16 excellent thermal conductivity of graphite plate of heat dissipation 18 top of column assembly setting, skin-friction coefficient
It is small, fusing point is high, have deformability, the heat of steel band 3 can quickly be passed to heat dissipation column assembly 18.
Cooling medium in the high-pressure nozzle 6 and cooling spray head 11 is cooling water and cooling spray respectively.On described
Pressing plate 8 is connected by a telescopic device with first quenching box upper end.Telescopic device is conventional telescopic rod.The glowing furnace
13 tops are provided with a waste heat comb being connected with sludge dryer, and the waste heat comb is connected with air blower, by glowing furnace 13
Interior waste heat realizes heat recovery for sludge drying by the discharge of waste heat comb.Waste heat comb by 8 3mm × 6cm not
Rust steel square tube arrangement is welded.
Experimentation:
High-pressure nozzle 6 in 1: the first quenching box of experiment is set as 5, and each capacity of sprinkler is 10L/min, the second quenching
The cooling spray head 11 of case is set as 2, and each cooling spray head flow is 4L/min, the specification of steel band 3 be 0.9mm ×
100mm, 3 movement velocity of steel band are 1.86 ms/min, and 3 material of steel band is 65Mn, and 3 heating temperature of steel band is 930 degree, and quenching is hard
Degree reaches 52HRC, and harden ability is good.
High-pressure nozzle 6 in 2: the first quenching boxes of experiment is set as 2, and each capacity of sprinkler is 8L/min, the second quenching
The cooling spray head 11 of case is set as 2, and each 11 flow of cooling spray head is 4L/min, specification and 1 phase of experiment of steel band 3
Together, 3 movement velocity of steel band is 1.86 ms/min, and 3 heating temperature of steel band is 930 degree, and quenching hardness reaches 48HRC, harden ability
It is good.
High-pressure nozzle 6 in 3: the first quenching boxes of experiment is set as 5, and each capacity of sprinkler is 10L/min, the second quenching
The cooling spray head 11 of case is set as 2, and each 1 flow of cooling spray head is 4L/min, 3 specification of steel band be 1.2mm ×
125mm, 3 movement velocity of steel band are 1.86 ms/min, and 3 heating temperature of steel band is 930 degree, quenching hardness 42HRC, harden ability
It is good.
The movement velocity of steel band 3 is faster, and certain production efficiency is higher, but the movement velocity of 3 band of steel will be 6 by high-pressure nozzle
The factors such as the first mild flow of several and capacity of sprinkler, 11 numbers of cooling spray head and capacity of sprinkler, cooling water and cooling spray
Limitation.
A kind of quenching technical of liquid bismuth alloy quenching unit, comprising the following steps:
Step 1: heating in heating furnace 4 to steel band 3, it is made to be changed into austenite structure；
Step 2: under the drive of hai roll wheel 1 and winding wheel 2, by the steel band after heating pass sequentially through the first quenching box and
Second quenching box carries out classification cooling；
Step 3: the first quenching box is stored with liquid bismuth, it will warm up the steel band of austenitizing with certain speed and immerse liquid
In state bismuth, the high-pressure nozzle 6 in the top board 8 of 3 upper end of steel band setting carries out cooling of spraying water with high pressure towards steel band, by steel band 3
Heat is taken away by cold water, and the heat dissipation column assembly 18 in the lower platen 14 of 3 lower end of steel band setting will transmit on graphite plate 16
Heat distributes, and carries out drop heat treatment in heat dissipation circulation canal；
Step 4: the liquid that the first hollow axle roller 9 for being located at 3 upside of steel band in the second quenching box passes through storage in it
Bismuth realizes cooling, and the second hollow axle roller 12 that 3 downside of steel band is located in the second hollow axle roller 11 is cold by being arranged inside
But fog-spray nozzle 11 carries out high-pressure fog cooling towards steel band 3, and the heat of steel band 3 is taken away.
In conjunction with attached drawing, the embodiments of the present invention are described in detail above, but the present invention is not limited to described implementations
Mode.For a person skilled in the art, in the case where not departing from the principle of the invention and spirit, to these embodiments
A variety of change, modification, replacement and modification are carried out, are still fallen in protection scope of the present invention.
Claims (10)
1. a kind of liquid bismuth alloy quenching unit, described including hai roll wheel, winding wheel, the steel band for connecting hai roll wheel and winding wheel
The heating furnace and glowing furnace being heat-treated to steel band are successively arranged between hai roll wheel and winding wheel, it is characterised in that: described to add
Hot stove and glowing furnace are there are high and low fall and are in totally-enclosed shape, and the glowing furnace is in inverted trapezoidal, the glowing furnace include by every
The first quenching box and the second quenching box that plate separates；
First quenching box includes the liquid bismuth being stored in first quenching box and is located at outside first quenching box, uses
In the heating plate for adjusting liquid bismuth temperature, the two sides across the steel band of first quenching box are separately provided for supplement heat rejecter
The hollow top board of steel band and the lower platen for being used to support steel band；
The top board is the metal of good heat conductivity, is provided with multiple high-pressure nozzles towards the steel band in the top board
With the import for giving the cooling liquid of high-pressure nozzle；
Second quenching box includes the first hollow axle roller and the second hollow axle roller for being located at the steel band or more two sides, institute
It states and is stored with a small amount of liquid bismuth in the first hollow axle roller, be provided in second hollow axle roller multiple towards the steel band
Cooling spray head.
2. a kind of liquid bismuth alloy quenching unit according to claim 1, it is characterised in that: the lower platen includes by upper
Sequentially connected graphite plate, heat dissipation column assembly and rock wool board under.
3. a kind of liquid bismuth alloy quenching unit according to claim 2, it is characterised in that: the heat dissipation column assembly is by three
A above, thermal column with side connecting plate and lower end connecting plate successively has pressure to be assembled to form, the two neighboring thermal column
Between gap formed heat dissipation circulation canal.
4. a kind of liquid bismuth alloy quenching unit according to claim 3, it is characterised in that: the thermal column is hollow knot
Structure, the thermal column use the lower stainless steel tube of thermal coefficient.
5. a kind of liquid bismuth alloy quenching unit according to claim 1 or 2 or 3 or 4, it is characterised in that: the steel band
It is equipped with by 4 nodes that high-level heating furnace steering low level glowing furnace turns again to winding wheel and is contacted with the steel band and drive institute
State the guide post that steel band steadily operates.
6. a kind of liquid bismuth alloy quenching unit according to claim 5, it is characterised in that: leading at each node
Three are set as to column.
7. a kind of liquid bismuth alloy quenching unit according to claim 1, it is characterised in that: the high-pressure nozzle and cooling
Cooling medium in fog-spray nozzle is cooling water and cooling spray respectively.
8. a kind of liquid bismuth alloy quenching unit according to claim 1, it is characterised in that: the top board is stretched by one
Compression apparatus is connected with first quenching box upper end.
9. a kind of liquid bismuth alloy quenching unit according to claim 1, it is characterised in that: the glowing furnace top setting
There is a waste heat comb being connected with sludge dryer, the waste heat comb is connected with air blower.
10. a kind of quenching technical of liquid bismuth alloy quenching unit, comprising the following steps:
Step 1: heating in heating furnace to steel band, it is made to be changed into austenite structure；
Step 2: the steel band after heating is passed sequentially through the first quenching box and second and is quenched under the drive of hai roll wheel and winding wheel
Fire-box carries out classification cooling；
Step 3: the first quenching box is stored with liquid bismuth, it will warm up the steel band of austenitizing with certain speed and immerse liquid bismuth
In, the high-pressure nozzle in the top board of steel band upper end setting carries out cooling of spraying water with high pressure towards steel band, by the heat of steel band by cold
Water is taken away, and the heat dissipation column assembly in the lower platen of steel band lower end setting is distributed the heat to get off is transmitted on graphite plate, is radiating
Circulation canal carries out drop heat treatment；
It is realized Step 4: being located at the first hollow axle roller on the upside of the steel band in the second quenching box by the liquid bismuth stored in it
It is cooling, be located in the second hollow axle roller the second hollow axle roller on the downside of the steel band pass through the cooling spray head that are arranged inside to
Steel band carries out high-pressure fog cooling, and the heat of steel band is taken away.
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