CN205747998U - Sintering furnace - Google Patents
Sintering furnace Download PDFInfo
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- CN205747998U CN205747998U CN201620497770.6U CN201620497770U CN205747998U CN 205747998 U CN205747998 U CN 205747998U CN 201620497770 U CN201620497770 U CN 201620497770U CN 205747998 U CN205747998 U CN 205747998U
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Abstract
The utility model discloses a kind of sintering furnace, including body of heater, chiller, body of heater includes charging chamber, the moist closet being positioned at outside charging chamber, the shell that is positioned at outside moist closet, described cooling system includes the gas storage units storing inertia cooling gas, described charging chamber is provided with the gas handling system connected with gas storage units, described body of heater is additionally provided with and the inertia in charging chamber is cooled down the gas extraction system that gas is discharged, and its production efficiency improves, and decreases the waste of the energy.
Description
Technical field
This utility model relates to material sintering art, more specifically, it relates to a kind of sintering furnace.
Background technology
Sintering furnace is the stove utilizing sensing heating that heated article carry out protectiveness sintering, can be divided into power frequency, intermediate frequency,
The types such as high frequency, can belong to the subclass of sintering furnace.Vacuum induction sintering furnace is under the conditions of vacuum or protective atmosphere, utilizes
The principle of Frequency Induction Heating makes carbide bit and various metal dust press body realize the complete set of equipments of sintering, is for firmly
Matter alloy, metal dysprosium, the commercial production of ceramic material and design.
As a example by steel, Steel material wants to obtain some characteristic, needs it is carried out heat treatment so that it is crystal structure is sent out
Changing, reaches the physical property needed.And Steel material is after sintering through sintering furnace, due to sintering furnace in prior art
The cooldown rate of cooling technology is limited, it is impossible to realizes quickly cooling, is therefore unable to reach in heat treatment the requirement of cooling rapidly,
Therefore, after Steel material completes sintering process, in needing to transfer them to heat-treatment furnace, heat treatment is carried out.As Fig. 1 a represents
Steel material process curve in sintering furnace in prior art, what Fig. 1 b represented is in prior art Steel material is in heat-treatment furnace
Process curve.Owing to sintering furnace is after sintering completes, needs to wait the cooling of material, add the time required for production,
Cool down complete after transfer to heat-treatment furnace, add the operation of production, cause production efficiency low.Additionally in sintering furnace
Material, from high temperature cooling, is transferred to re-start again in heat-treatment furnace heating, be result in the waste of energy.
Utility model content
The deficiency existed for prior art, the purpose of this utility model is to provide a kind of sintering furnace, its production efficiency
Improve, decrease the waste of the energy.
For achieving the above object, this utility model provides following technical scheme: a kind of sintering furnace, including body of heater, cooling
Device, body of heater includes charging chamber, the moist closet being positioned at outside charging chamber, the shell that is positioned at outside moist closet, described cooling system bag
Including the gas storage units of storage inertia cooling gas, described charging chamber is provided with the air inlet system connected with gas storage units
System, described body of heater is additionally provided with and the inertia in charging chamber is cooled down the gas extraction system that gas is discharged.
By using upper technique scheme, the inertia in gas storage units is cooled down gas and is passed directly into sintering furnace
Charging chamber in, after gasifying due to nitrogen and the argon of liquid, temperature is extremely low, the nitrogen of low temperature or argon in charging chamber and
Material carries out heat exchange, owing to inertia cooling gas directly contacts with material, carries out heat exchange in the most efficient manner, will
Temperature on material is taken away, it is achieved cooling rapidly of material, and the constant interval of cooldown rate is bigger, such that it is able to by not
Same cooling condition produces after making material sintering and produces different products, completes the technique to material heat treatment, by single sintering
Stove completes sintering and two technical processs of heat treatment, eliminates process and the heat treatment of Slow cooling in sintering furnace in prior art
The process heated up in stove, has gone the process being transferred to heat-treatment furnace from sintering furnace simultaneously less, and the production efficiency made improves, subtracts
Lack the waste of the energy.
This utility model is further arranged to: the bottom of described gas handling system connection charging chamber, the top of described charging chamber
Portion is provided with and inertia cools down the steam vent that gas is discharged, described steam vent connection gas extraction system.
By using technique scheme, the principle risen according to hot-air, gas handling system, warp are connected in the bottom of charging chamber
Inertia cooling gas after Overheating Treatment is discharged from top, improves cooling effectiveness.
This utility model is further arranged to: described steam vent connection moist closet, described gas extraction system and moist closet
Connection.
By using technique scheme, the steam vent connection moist closet of charging chamber, the inertia discharged from charging chamber cooling
Its temperature of gas is still handed over low, and cooling down gas thus into the inertia in moist closet can also enter again with the outer wall of charging chamber
Row heat exchange, improves the service efficiency of inertia cooling gas.By the material in charging chamber is directly cooled down and to charging chamber
The cooling of outer wall, the rate of cooling that the dual type of cooling makes is exceedingly fast.
This utility model is further arranged to: be provided with heat dissipation chamber between described moist closet and shell, and described moist closet sets
There is the circulation air inlet communicated with heat dissipation chamber, recycle QI KOU and drive gas at the centrifugal wind of heat dissipation chamber with charging chamber's circulation
Machine.
By use technique scheme, enter in moist closet inertia cooling gas circulating fan effect it
Under, the inertia cooling gas in charging chamber is discharged by the QI KOU that recycles of moist closet, and circulation air inlet returns to, in moist closet, enter one
The service efficiency of the increase inertia cooling gas of step, makes the gas between moist closet and heat dissipation chamber carry out by gas-circulating system
Gas circulates, and makes to be fully contacted between inertia cooling gas and material, increases the material in charging chamber and inertia further
Cooling gas carries out heat exchange, improves cooling effectiveness, increases the utilization ratio of inertia cooling gas.
This utility model is further arranged to: described circulation air inlet is positioned at the two ends of moist closet with recycling QI KOU,
The described QI KOU that recycles is equipped with open and close door with recycling QI KOU.
By using technique scheme, the inertia cooling gas in charging chamber is made to flow by centrifugal blower, from
The air-flow of the generation of heart-wind syndrome machine, from one end of charging chamber to the other end, improves cycle efficieny.
This utility model is further arranged to: described gas-circulating system also includes the water wind heat radiation being positioned at heat dissipation chamber
Device, described water wind radiator connects recirculating cooling water system.
By using technique scheme, use water wind radiator that the inertia in heat dissipation chamber is cooled down gas and dispel the heat,
So can reduce the use of inertia cooling gas, reduce cost, use water wind radiator can increase material cooling simultaneously
Efficiency.
This utility model is further arranged to: described shell two ends are provided with fire door, and described circulating fan is fixed on stove
Men Shang, described fire door is additionally provided with the mechanism for opening/closing controlling open and close door switch.
By using technique scheme, gas-circulating system is isolated by open and close door with moist closet, thus avoids gas to follow
Loop systems is damaged because of the high temperature of moist closet, is closed by circulation air inlet simultaneously, makes the gas being passed in charging chamber concentrate
The material in charging chamber is cooled down, improve cooling efficiency, the keying of open and close door is entered by the mechanism for opening/closing on fire door
Row controls, it is achieved automatization.
Accompanying drawing explanation
Fig. 1 a is the temperatur-timel curve of sintering furnace in prior art；
Fig. 1 b is the temperatur-timel curve of heat-treatment furnace in prior art；
Fig. 2 is the temperatur-timel curve of the sintering process of the first sintering furnace；
Fig. 3 is the temperatur-timel curve of the sintering process of the second sintering furnace；
Fig. 4 is the CCT figure of eutectoid steel；
Fig. 5 by Different Cooling Conditions lower the temperatur-timel curve of generation product；
Fig. 6 is the structural representation of this sintering furnace.
Reference: 1, body of heater；11, fire door；12, open and close door；13, mechanism for opening/closing；15, circulating fan；15, water wind heat radiation
Device；2, shell；21, cooling sandwith layer；22, heat dissipation chamber；3, heat-insulation layer；31, moist closet；32, circulation air inlet；33, circulation is given vent to anger
Mouthful；4, charging chamber；41, steam vent；5, gas handling system；6, gas extraction system；7, gas storage units.
Detailed description of the invention
For defect present in prior art, process curve of the present utility model is as shown in Fig. 2,3,6, by contrast,
In this utility model process curve, the process before I point is identical with the process curve of prior art Fig. 1；After I point, have employed
Cooling technology rapidly, cools down inertia gas and (such as nitrogen, argon etc., the most also includes that other refuse material generation chemical reaction
Gas) be passed through to sintering furnace charging chamber 4 with in moist closet 31, temperature pole after vaporizing with argon due to the nitrogen of liquid
Low.Heat exchange is carried out, the inertia cooling after heat exchange in the nitrogen of low temperature or argon are passed through charging chamber 4 and moist closet 31
Gas discharges sintering furnace, controls inertia cooling gas and is passed through sintering furnace and discharges the speed of sintering furnace, controls in sintering furnace stove
Air pressure.
Owing to inertia cooling gas directly contacts with material, carry out heat exchange in the most efficient manner, by material
Temperature take away, it is achieved cooling rapidly of material.While being passed through inertia cooling gas, gas can be cooled down in inertia
Inside being mixed into additive, for reacting with Steel material, make new element increase in Steel material, such as material surface needs to ooze
Carbon nitriding, thus can increase carbon dioxide or nitrogen in inertia cooling gas.
Inertia cooling gas comes from external cooling system, and cooling system includes the gas storage units 7 in Fig. 6, will
In gas storage units 7, inertia cooling gas connects sintering furnace by gas handling system 5.Inertia cooling gas in this utility model
Can be to recycle, the high-temperature gas got rid of in sintering furnace re-enters into cooling system and carries out cooling recycling；Also
Can single use, i.e. inertia cooling gas be discharged directly to air with heat in sintering furnace, it is ensured that enter into sintering
Inertia cooling gas in stove is all low temperature, thus realizes material cooling rapidly.
The process that the inertia cooling gas of low temperature is passed through to sintering furnace is divided into the fast aeration stage and inflates at a slow speed
In the stage, the high-temperature material in charging chamber 4 that can make of fast aeration carries out quick heat exchange with inertia cryogenic gas, it is achieved fast
The cooling of speed, after the speed dropped at temperature reaches requirement, carries out inflation at a slow speed, makes between material and inertia cooling gas
Carry out sufficient heat exchange, reduce the use of inertia cooling gas, reduce production cost.
As it is shown in figure 5, what it mainly represented is the product changed under Different Cooling Conditions, by this utility model institute
The cooling means provided, can make the cooling rapidly of the material in sintering furnace, make the condition of cooling reach such as the limit that keeps left in Fig. 5
X1 curve, can produce the product of M+A ' (martensite+austenite) under this cooling condition, and due to cooldown rate in prior art
Cannot be bigger than the cooldown rate of X1 curve, the most existing sintering furnace is to be unable to reach the bar of left side X1, X2 curve in Fig. 5
Part, the most just cannot generate M+A '.According to the curvilinear motion condition in Fig. 5, this utility model provides two kinds and obtains M+A ' product
The sintering process of sintering furnace:
The sintering process of the first sintering furnace, temperatur-timel curve as shown in Figure 2:
(1) negative pressure dewaxing；Air pressure in reduction sintering furnace is to the air pressure that dewaxes, and is passed through inertia cooling gas, to sintering furnace
Inside carry out heating and keeping dewaxing temperature until cured gasification is discharged with inertia cooling gas；
(2) vacuum-sintering；To being warming up to vacuum-sintering temperature in sintering furnace, control the air pressure in sintering furnace to vacuum-sintering
Air pressure, and complete vacuum-sintering；
(3) dividing potential drop sintering；Temperature in control sintering furnace, to dividing potential drop sintering temperature, controls the air pressure in sintering furnace to dividing potential drop
Sintering air pressure, and complete dividing potential drop sintering；
(4) heat treatment；Cooling in heat treatment uses the cooling means of sintering furnace as claimed in claim 1.
(5) technique terminates
I.e. material is after sintering completes, and is directly cooled down by the cooling means of sintering furnace, the process of its heat treatment
In, owing to have employed the cooling means of sintering furnace, the speed of its cooling can reach the curve shown in Far Left X1 in Fig. 5, real
Quenching in existing heat treatment, obtains the product of M+A ', it is adaptable to thickness is thicker, the workpiece that structure is relatively simple.
The sintering process of the second sintering furnace, temperature time curve as shown in Figure 3:
(1) negative pressure dewaxing；Air pressure in reduction sintering furnace is to the air pressure that dewaxes, and is passed through inertia cooling gas, to sintering furnace
Inside carry out heating and keeping dewaxing temperature until cured gasification is discharged with inertia cooling gas；
(2) vacuum-sintering；To being warming up to vacuum-sintering temperature in sintering furnace, control the air pressure in sintering furnace to vacuum-sintering
Air pressure, and complete vacuum-sintering；
(3) dividing potential drop sintering；Temperature in control sintering furnace, to dividing potential drop sintering temperature, controls the air pressure in sintering furnace to dividing potential drop
Sintering air pressure, and complete dividing potential drop sintering；
(4) the coldest；Inertia cools down gas be passed through to charging chamber 4, in making inertia cooling gas and charging chamber 4
Material carries out heat exchange, the inertia in charging chamber 4 is cooled down gas and discharges in charging chamber 4.
(5) dividing potential drop holds temperature；Control the temperature in sintering furnace and hold temperature temperature, and the air pressure controlled in sintering furnace holds temperature to dividing potential drop
Air pressure, completes dividing potential drop and keeps steady.
(6) negative pressure is cold；Lower the air pressure in sintering furnace, and sintering furnace is quickly cooled down.
(7) technique terminates.
Wherein (4), (5), (6) are the technique of grade quench in heat treatment, as shown in Figure 3 shown in X2 curve, equally may be used
To obtain the product of M+A ', but (austenite is face-centred cubic structure, and martensite is owing to austenite is bigger than the density of martensite
Oversaturated body-centered structure of the quartet), therefore austenite can produce thermal stress during martensite transfor mation and transformation stress is (difficult to understand
The internal stress that family name's body produces to the change in volume of martensite transfor mation is transformation stress), cause workpiece to produce cracking, crackle,
For complex-shaped workpieces the most serious.Use aus-bay quenching can efficiently reduce the product of crackle in transition process
Raw.
Owing to the continuous transition curve of the overcooling austenite of eutectoid steel is the simplest, he only has pearlite and martensite range,
Not having bainite transformation district, therefore this utility model is as a example by eutectoid steel, is the CCT curve of eutectoid steel as shown in Figure 4, Qi Zhongzhu
To be martensite range by Ms and cooling speed below line Vc；Perlitic transformation district is made up of 3 curves, the left side for supercool Austria
Family name's body change initial, the right is Cooling Austenite Transformation end of a period line, below write the two or more syllables of a word together be Cooling Austenite Transformation terminated line；
Overcooling austenite with V1 speed cool down, when cooling curve intersects with perlitic transformation initial, austenite start to
Perlitic transformation, obtains 100% pearlite when ending first intersect with perlitic transformation；
The when that overcooling austenite rate of cooling increasing to Vc ', transition process is identical with during V1, also to 100% pearly-lustre
Body, but change the temperature started and end and reduce, changing interval and increase, fringe time shortens, and obtains the pearlite spread and strengthens；
Overcooling austenite cools down with V2 speed, and cooling curve intersects with perlitic transformation initial, and perlitic transformation occurs,
But when being cooled to change termination line, perlitic transformation stops, continuing to be cooled to below Ms point, do not change austenite generation martensite and turn
Become；
Overcooling austenite is with cooldown rate more than Vc, and austenite is subcooled to Ms point and occurs below martensite transfor mation, and cooling is eventually
Martensite+austenite (remaining) is obtained after Zhi；
Prior art being, its rate of cooling is slower, it is impossible to make the speed of cooling be more than Vc at the beginning of the limitation of sintering furnace,
And the cooling effect of the cooling means of the sintering furnace provided in this utility model is splendid, cooldown rate can be made to be more than Vc, the most just
The product of martensite+austenite (remaining) can be obtained.Speed in the sintering furnace that the gas of inertia cooling simultaneously is filled with, pressure can
Control, the control interval of the cooldown rate made is bigger, it is possible to achieve the cooling of multiple condition, such that it is able to the bar cooled down by change
Part obtains the product of the various heat treatments in Fig. 4, makes heat treatment be completed without additionally being transferred to heat-treatment furnace in sintering furnace
Inside carry out heat treatment.
As shown in Figure 6, outermost layer is the shell 2 of sintering furnace, and shell 2 is internal is provided with cooling sandwith layer 21, at cooling sandwith layer 21
Inside it is connected with cooling water, may be used for dispelling the heat to body of heater 1 is internal, keep the temperature of shell 2 outer wall to be unlikely too high, outward simultaneously
Inside shell 2 one layer is heat-insulation layer 3, is heat dissipation chamber 22 between heat-insulation layer 3 and shell 2, and the inside of heat-insulation layer 3 is moist closet 31,
The two ends of moist closet 31 are through, opened and closed by open and close door 12, and open and close door 12 is installed on the fire door 11 of shell 2, passes through stove
Mechanism for opening/closing 13 on door 11 controls opening and closing of open and close door 12；Charging chamber 4, charging chamber 4 it is provided with inside moist closet 31
For loading sintered material.
The bottom of charging chamber 4 is provided with gas handling system 5, and gas handling system 5 connects with gas storage units 7, and gas storage is single
Unit's 7 storage inside have the inertia cooling gas of compression, needing to cool down the material within charging chamber 4 when, pass through
Gas in gas storage units 7 is introduced charging chamber 4 by gas handling system 5, the inertia cooling gas of liquid in gas storage units 7
Liquefaction, can absorb substantial amounts of heat, is passed through and cools down gas and material to inertia charging chamber 4 within and directly carry out heat exchange, cold
But efficiency is high, and in charging chamber 4, the cooldown rate of material reaches the requirement of heat treatment, and complete in above-mentioned process engineering is heat treated
Journey.
Inertia through heat exchange cools down gas and enters in moist closet 31 by the steam vent 41 at top, charging chamber 4, warp
Inertia cooling its temperature of gas crossing a heat exchange is the most relatively low, the outer wall of charging chamber 4 can carry out heat exchange again, increase
Add the service efficiency of inertia cooling gas, reduce cost.Moist closet 31 connects and has gas extraction system 6, lazy through heat exchange
Property cooling gas discharge moist closet 31 by gas extraction system 6；By controlling feed rate and the control gas extraction system of gas handling system 5
The deflation rate of 6, can be controlled the air pressure in charging chamber 4, makes the air pressure in charging chamber 4 meet the requirement of heat treatment.
In order to further increase the service efficiency of inertia cooling gas, open and close door can be opened by mechanism for opening/closing 13
12, wherein mechanism for opening/closing 13 can use oil cylinder, cylinder or click on to realize, after opening open and close door 12, can make moist closet 31 with
Heat dissipation chamber 22 connects, and under the effect of circulating fan 14, makes gas circulate between moist closet 31 and heat dissipation chamber 22, its
The path of the flowing of middle gas as illustrated by the arrows in fig. 1, wherein moist closet near circulating fan one end for recycling QI KOU 33,
The other end is circulation air inlet 32.Water wind radiator 15 it is provided with in the front end of circulating fan 14, logical in water wind radiator 15
When entering circulating cooling, it is achieved the gas in body of heater 1 is cooled down.When gas is at heat dissipation chamber 22 and moist closet 31 internal circulation flow
When, gas also carries out heat exchange with shell 2, by the cooling water in shell 2 cooling sandwith layer 21 by the heat band in gas
Walking, so that the heat of gas reduces, in heat dissipation chamber 22, the gas through cooling is passed through again to moist closet 31, to moist closet 31
Interior material cools down, and circulates and so forth, increases the speed of heat radiation.Inertia cooling gas can also be increased by this structure
The utilization ratio of body, because after inertia cools down gas and material, its temperature still ratio is relatively low, enters by the way of above-mentioned
Row circulation, can make inertia cooling gas and the sufficient heat exchange of material in charging chamber 4.
The above is only preferred implementation of the present utility model, and protection domain of the present utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under this utility model thinking belong to protection domain of the present utility model.Should refer to
Go out, for those skilled in the art, without departing from the some improvement under this utility model principle premise and
Retouching, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (7)
1. a sintering furnace, including body of heater, chiller, body of heater includes charging chamber, the moist closet being positioned at outside charging chamber, is positioned at guarantor
Shell outside greenhouse, is characterized in that: described cooling system includes the gas storage units storing inertia cooling gas, described
Charging chamber is provided with the gas handling system connected with gas storage units, and described body of heater is additionally provided with and the inertia in charging chamber is cooled down gas
The gas extraction system that body is discharged.
Sintering furnace the most according to claim 1, is characterized in that: the bottom of described gas handling system connection charging chamber, described
The top of charging chamber is provided with and inertia cools down the steam vent that gas is discharged, described steam vent connection gas extraction system.
Sintering furnace the most according to claim 1, is characterized in that: described steam vent connection moist closet, described exhaust system
System connects with moist closet.
Sintering furnace the most according to claim 3, is characterized in that: be provided with heat dissipation chamber between described moist closet and shell, described
Moist closet be provided with communicate with heat dissipation chamber circulation air inlet, recycle QI KOU and drive gas follow with charging chamber in heat dissipation chamber
The centrifugal blower of ring.
Sintering furnace the most according to claim 4, is characterized in that: described circulation air inlet is positioned at insulation with recycling QI KOU
The two ends of room, the described QI KOU that recycles is equipped with open and close door with recycling QI KOU.
Sintering furnace the most according to claim 5, is characterized in that: described gas-circulating system also includes being positioned at heat dissipation chamber
Water wind radiator, described water wind radiator connects recirculating cooling water system.
Sintering furnace the most according to claim 5, is characterized in that: described shell two ends are provided with fire door, described circulated air
Machine is fixed on fire door, and described fire door is additionally provided with the mechanism for opening/closing controlling open and close door switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620497770.6U CN205747998U (en) | 2016-05-26 | 2016-05-26 | Sintering furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620497770.6U CN205747998U (en) | 2016-05-26 | 2016-05-26 | Sintering furnace |
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| Publication Number | Publication Date |
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| CN205747998U true CN205747998U (en) | 2016-11-30 |
Family
ID=57362103
Family Applications (1)
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| CN201620497770.6U Active CN205747998U (en) | 2016-05-26 | 2016-05-26 | Sintering furnace |
Country Status (1)
| Country | Link |
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| CN (1) | CN205747998U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436097A (en) * | 2016-05-26 | 2017-12-05 | 东庚实业股份有限公司 | Cooling means, sintering process and the sintering furnace of sintering furnace |
| CN109420759A (en) * | 2017-08-28 | 2019-03-05 | 深圳市富优驰科技有限公司 | The technique for promoting the 17-4PH mechanical property of materials using vacuum sintering furnace |
-
2016
- 2016-05-26 CN CN201620497770.6U patent/CN205747998U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436097A (en) * | 2016-05-26 | 2017-12-05 | 东庚实业股份有限公司 | Cooling means, sintering process and the sintering furnace of sintering furnace |
| CN109420759A (en) * | 2017-08-28 | 2019-03-05 | 深圳市富优驰科技有限公司 | The technique for promoting the 17-4PH mechanical property of materials using vacuum sintering furnace |
| CN109420759B (en) * | 2017-08-28 | 2021-05-18 | 深圳市富优驰科技有限公司 | Process for improving mechanical property of 17-4PH material by using vacuum sintering furnace |
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