CN208701124U - Dual chamber isothermal normalizing air cooling system - Google Patents
Dual chamber isothermal normalizing air cooling system Download PDFInfo
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- CN208701124U CN208701124U CN201821243196.7U CN201821243196U CN208701124U CN 208701124 U CN208701124 U CN 208701124U CN 201821243196 U CN201821243196 U CN 201821243196U CN 208701124 U CN208701124 U CN 208701124U
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- greenhouse
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- cooling chamber
- equal greenhouse
- quick cooling
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Abstract
A kind of dual chamber isothermal normalizing air cooling system.It includes the quick cooling chamber being disposed side by side between austenite heating furnace and isothermal transformation furnace and equal greenhouse；Quick cooling chamber includes quick cooling chamber cabinet and cooling machice to supply fan；Equal greenhouse includes equal greenhouse body, equal greenhouse partition door, equal greenhouse air supply device, equal greenhouse stirring blower, equal type greenhouse heating apparatus, temperature sensing device and temperature controller.The utility model advantage: two kinds of different process are required to be divided into quick cooling chamber and equal greenhouse controls respectively, in continuous production process, every room temperature keeps lesser fluctuation, simultaneously, quick cooling chamber can greatly improve cooling velocity, equal greenhouse can significantly fast stabilizing temperature, the requirement of rapid cooling and samming is taken into account, therefore different materials can be handled in different four seasons day and night temperatures, different batches, obtain uniform pearlite, it is possible to the significantly stress of constriction hardness scattered error and elimination inside workpiece.
Description
Technical field
The utility model belongs to technical field of heat treatment equipment, more particularly to a kind of dual chamber isothermal normalizing air cooling system
System.
Background technique
Gear a large amount of for industries such as heavy truck, passenger car, engineering machinery, farm machineries, it is universal both at home and abroad at present
Using forging, isothermal normalizing, machining and case-carbonizing heat treatment process.Isothermal normalizing work of the gear blank after forging
Skill is the key that improve the machinability of gear blank, control its final heat treatment aberrant type.Longevity is used to final gear product
Life, running noise etc. play a key role.
Isothermal normalizing process handles well, and rough forging has uniform pearlite, therefore has moderate hardness
And very narrow hardness scattered error, meanwhile, the forging stress of inside workpiece discharges more abundant.Especially machined in current gear
It is a large amount of using cut fastly it is dry cut equipment, for the uniformity of hardness, more stringent requirements are proposed.Meanwhile uniform metallographic group
It knits and less forging stress is beneficial to the aberrant type control that final carburizing is heat-treated reheating, for improving the longevity of gear
Life reduces noise and is of great significance.
According to the main material that gear industry is general, isothermal normalizing technique mostly use greatly first workpiece is heated on Ac3 line,
It is air-cooled after abundant austenitizing, it comes out of the stove down after the completion of perlitic transformation subsequently into about 10000 seconds constant temperature process
Material.
Air-cooled entire isothermal normalizing technique is crucial.According to different material metal metallurgical transformation features, metal is in Ovshinsky
It is a complicated process that body area, which is cooled to phase transition temperature process, is slowly cooled into ferrite, speed fast some formation again
Mixture-pearlite of ferrite and cementite more faster forms bainite even martensite.The transformation of these metallographics is logical
It is often what the very short time within 10-1000 seconds completed, and irreversible.
Isothermal normalizing technique generallys use air-cooled technology at present.Workpiece is in about 10-1000 seconds from 900 degree of austenitic area
600 degree of phase transition temperature or so are down to, above to obtain pearlite.If cooling rate is too fast during this, cementite in pearlite will lead to
Increase, or even forms bainite, it is higher so as to cause hardness；Cooling rate is easy to cause ferrite content in pearlite excessively high slowly excessively,
Lower hardness；
And workpiece will lead to the temperature drop speed difference of workpiece everywhere because of the difference of surface and core and workpiece effective diameter
Difference different, that the ferrite and cementite for inevitably resulting in phase transition process are precipitated.This usual species diversity is right between 200-600 seconds
The hardness of final workpiece influences maximum.
In order to reduce the temperature difference in this section to the maximum extent, continous way isothermal normalizing production line is generally adopted both at home and abroad at present
With single chamber cooling chamber, and it is divided to two sections or multistage control cooling velocity.Leading portion belongs to rapid cooling section, back segment is slow cooling section.In rapid cooling section,
Workpiece temperature is rapidly decreased to phase transition temperature, slow cooling section then reduces each portion's temperature difference of workpiece, to reach workpiece respectively sentence it is identical
Temperature enters phase change transition temperature.
Single chamber cooling chamber completes rapid cooling, annealing process using a cooling chamber, and existing prominent question is: continuously giving birth to
In producing line, each period, interior will complete a rapid cooling, slow cooling this conflicting process.Because air is a kind of ratio
The lesser substance of thermal capacitance requires, adjusts the temperature of air to be a slow process relative to transformation time.Actually single chamber is cold
But, rapid cooling and slow cooling are difficult to take into account.
Meanwhile being influenced by season and day and night temperature and humidity, the specific heat capacity of air changes greatly, therefore in practical life
In production, the air-cooled technology of single chamber is difficult to obtain accurate process results.
Summary of the invention
To solve the above-mentioned problems, the purpose of this utility model is to provide one kind can be quick by workpiece in a short time
Uniformity carries out cooling dual chamber isothermal normalizing air cooling system.
In order to achieve the above object, dual chamber isothermal normalizing air cooling system provided by the utility model includes being disposed side by side on
Quick cooling chamber and equal greenhouse between austenite heating furnace and isothermal transformation furnace；Wherein quick cooling chamber includes being quickly cooled down
Chamber body and cooling machice to supply fan；Divide on the side in austenite heating furnace and equal greenhouse on the quick cooling chamber cabinet
It is not formed with a workpiece and passes through mouth；Cooling machice to supply fan is mounted on quick cooling chamber cabinet；Equal greenhouse includes equal greenhouse
Body, equal greenhouse partition door, equal greenhouse air supply device, equal greenhouse stirring blower, equal type greenhouse heating apparatus, temperature sensing device and temperature
Control instrument；It is logical that a workpiece is respectively formed on the side of quick cooling chamber and isothermal transformation furnace on the equal greenhouse body
Cross mouth；Each workpiece makes equal greenhouse form single thermal field control zone by installing an equal greenhouse partition door respectively on mouth；?
Greenhouse air supply device, equal greenhouse stirring blower, equal type greenhouse heating apparatus and temperature sensing device are mounted on equal greenhouse body；Temperature
Control instrument be arranged outside equal greenhouse body, and by conducting wire respectively with equal greenhouse air supply device, equal type greenhouse heating apparatus and temperature
Sensing device and temperature controller connection.
Each workpiece of the quick cooling chamber cabinet by installing a rapid cooling on mouth in a selectable manner
Room partition door.
Dual chamber isothermal normalizing air cooling system provided by the utility model has the following advantages that and good effect:
There is different metallographic TTT curves for different materials, the cooling rate front half section in 0-1000 seconds requires fast quickly cooling
But, the second half section requires that high-temperature part is reduced temperature by the heat transmitting of metal, and low temperature portion decilitre high-temperature, this is a samming mistake
Journey.The utility model requires to be divided into quick cooling chamber by two kinds of different process and equal greenhouse controls respectively, in continuous production process
In, every room temperature keeps lesser fluctuation, meanwhile, quick cooling chamber can greatly improve cooling velocity, and equal greenhouse can be substantially
Fast stabilizing temperature is spent, has taken into account the requirement of rapid cooling and samming, therefore can be in different four seasons day and night temperatures, different shove charges
Amount handles different material, obtains uniform pearlite, it is possible to significantly constriction hardness scattered error and eliminate in workpiece
The stress in portion.There is good cutting ability by treated workpiece, workpiece becomes after carburizing heat treatment is carried out after cutting
Shape is small, noise when improving service life of gear and considerably reducing gear engaged transmission.
Detailed description of the invention
Consider the detailed description of the following preferred embodiment to the utility model in conjunction with the accompanying drawings, the utility model it is each
Kind target, feature and advantage will become apparent.Attached drawing is only the exemplary diagram of the utility model, is not necessarily
It is drawn to scale.In the accompanying drawings, same appended drawing reference always shows same or similar component.Wherein:
Fig. 1 is the TTT that dual chamber isothermal normalizing air cooling system provided by the utility model is applied to certain common pinion steel
Metallurgical transformation schematic diagram cooling procedure.
Fig. 2 is dual chamber isothermal normalizing air cooling system structural schematic diagram provided by the utility model.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that this is practical new
Type will be full and complete, and the design of example embodiment is comprehensively communicated to those skilled in the art.It is identical in figure
Appended drawing reference indicates same or similar structure, thus the detailed description that will omit them.
It is described below the difference to the utility model is exemplary, is carried out referring to attached drawing, it is practical that the attached drawing forms this
Novel a part, and the exemplary knot of difference of many aspects of achievable the utility model is wherein shown by way of example
Structure, system and step.It should be understood that other specified schemes of component, structure, exemplary means, system and step can be used, and
And structural and functional modification can be carried out without departing from the scope of the utility model.Although moreover, can in this specification
The different example features of the utility model are described using term " top ", " bottom ", " front ", " rear portion ", " side " etc.
And element, but these terms are in this article merely for convenient, for example, with reference to the accompanying drawings described in exemplary direction.This explanation
Any content in book is not necessarily to be construed that the specific three dimensional direction of Structure of need is just fallen into the scope of the utility model.
As shown in Fig. 2, dual chamber isothermal normalizing air cooling system provided by the utility model includes being disposed side by side on austenite
Quick cooling chamber 2 and equal greenhouse 3 between heating furnace 1 and isothermal transformation furnace 4；Wherein quick cooling chamber 2 includes being quickly cooled down
Chamber body 2.3 and cooling machice to supply fan 2.2；Close to austenite heating furnace 1 and equal greenhouse on the quick cooling chamber cabinet 2.3
It is respectively formed with a workpiece on 3 side and passes through mouth；Cooling machice to supply fan 2.2 is mounted on quick cooling chamber cabinet 2.3；?
Greenhouse 3 include equal greenhouse body 3.7, equal greenhouse partition door 3.1, equal greenhouse air supply device 3.2, equal greenhouse stirring blower 3.3,
Type greenhouse heating apparatus 3.4, temperature sensing device 3.5 and temperature controller 3.6；Close to rapid cooling on the equal greenhouse body 3.7
It is respectively formed with a workpiece on room 2 and the side of isothermal transformation furnace 4 and passes through mouth；Each workpiece by installing one on mouth respectively
Equal greenhouse partition door 3.1；Equal greenhouse air supply device 3.2, equal greenhouse stirring blower 3.3, equal type greenhouse heating apparatus 3.4 and temperature sense
Device 3.5 is answered to be mounted on equal greenhouse body 3.7；Temperature controller 3.6 is arranged outside equal greenhouse body 3.7, and passes through conducting wire point
It is not electrically connected with equal greenhouse air supply device 3.2, equal type greenhouse heating apparatus 3.4 and temperature sensing device 3.5.
Each workpiece of the quick cooling chamber cabinet 2.3 by installing a fast quickly cooling on mouth in a selectable manner
But room partition door 2.1.If cooling machice to supply fan 2.2 is capable of providing enough cooling winds, can be not provided with quick cooling chamber every
Disconnected door 2.1, cooling wind can keep apart quick cooling chamber 2 and austenite heating furnace 1 and equal greenhouse 3.
Now the working principle of dual chamber isothermal normalizing air cooling system provided by the utility model is described below:
It is described in detail in the present embodiment using the automobile gear made of Common Steels 22CrMo material as workpiece 5.Such as
Shown in Fig. 2, workpiece 5 is heated to 930 degree in austenitizing heating furnace 1 first, if being equipped with quick cooling chamber partition door
2.1, opening, which is mounted on quick cooling chamber 2, passes through the quick cooling chamber partition door on mouth close to the workpiece of austenite heating furnace 1
2.1, so that workpiece 5 is entered the inside of quick cooling chamber 2 by mouth by the workpiece later, be then shut off the quick cooling chamber every
Disconnected door 2.1 forms independent humidity province to keep apart austenitizing heating furnace 1 and equal greenhouse 3.Start cooling machice to supply fan
2.2, to be rapidly cooled to the workpiece 5 in quick cooling chamber 2.As shown in Figure 1, during rapid cooling, in workpiece 5 compared with
Thin part or surface is cooled rapidly, and thicker portion and core cooling are slower, form the biggish temperature difference.Such as scheming
In horizontal axis shown in 1 during 10 seconds to 100 seconds, temperature drop partially not touches the area martensite M and the area bainite B faster.This
When workpiece 5 there is no phase transformation, be still austenite." cooling section " as shown in figure 1.
Workpiece 5 opens the work being mounted on quick cooling chamber 2 close to equal greenhouse 3 after the rapid cooling of quick cooling chamber 2
Part passes through mouth by the quick cooling chamber partition door 2.1 on mouth and the workpiece being mounted on equal greenhouse 3 close to quick cooling chamber 2
On equal greenhouse partition door 3.1, and workpiece 5 is made to be quickly transferred to equal greenhouse 3 from quick cooling chamber 2, closes equal greenhouse partition door
3.1, to keep apart quick cooling chamber 2 and constant-temperature oven 4, form independent temperature controlled region.Before workpiece 5 enters equal greenhouse 3, samming
The temperature of room 3 has reached the temperature set on temperature controller 3.6, after workpiece 5 enters equal 3 inside of greenhouse, if greenhouse 3
Internal temperature be higher than temperature controller 3.6 set temperature, then open equal greenhouse air supply device 3.2 and be blown into cold wind, while samming
Room heating device 3.4 stops heating；, whereas if the internal temperature in greenhouse 3 is lower than the set temperature of temperature controller 3.6, then close
Equal greenhouse air supply device 3.2 is closed, while starting equal type greenhouse heating apparatus 3.4 and starting to be heated.The purpose of bidirectional modulation exists
It is controlled rapidly in lesser range in by the internal temperature in equal greenhouse 3, and tends to the set temperature close to temperature controller 3.6.Together
When, utilize the air inside the equal greenhouse stirring equal greenhouse 3 of 3.3 forced circulation of blower.It is in addition warm on workpiece 5 by above-mentioned measure
It spends higher region and leads to heat transfer to the lower region transmitting heat of temperature, workpiece 5 can be made to be rapidly achieved in 1000 seconds together
The transition temperature of sample and carry out perlitic transformation.Cementite is precipitated in metal at this time and ferritic ratio reaches unanimity, and hardness is all
Thus control reaches the ideal effect of isothermal normalizing technique in minimum range.
Some preferred embodiment formulas of the utility model are illustrated in conjunction with attached drawing above.The affiliated technology of the utility model
Field it is to be appreciated by one skilled in the art that specific structure shown in above-mentioned specific embodiment part and technical process only
It is exemplary only, and not restrictive.Moreover, the utility model person of an ordinary skill in the technical field can be to the above institute
Various technical characteristics shown in stating are combined to constitute new technical solution according to various possible modes, or are carried out other
Change, and belong within the scope of the utility model.
Claims (2)
1. a kind of dual chamber isothermal normalizing air cooling system, it is characterised in that: the dual chamber isothermal normalizing air cooling system includes
The quick cooling chamber (2) and equal greenhouse (3) being disposed side by side between austenite heating furnace (1) and isothermal transformation furnace (4)；Wherein
Quick cooling chamber (2) includes quick cooling chamber cabinet (2.3) and cooling machice to supply fan (2.2)；The quick cooling chamber cabinet
(2.3) workpiece, which is respectively formed with, on the side in austenite heating furnace (1) and greenhouse (3) on passes through mouth；It is cooling to supply
Wind blower (2.2) is mounted on quick cooling chamber cabinet (2.3)；Equal greenhouse 3 includes equal greenhouse body (3.7), the partition of equal greenhouse
Door (3.1), equal greenhouse air supply device (3.2), equal greenhouse stir blower (3.3), equal type greenhouse heating apparatus (3.4), temperature sense
Device (3.5) and temperature controller (3.6)；Close to quick cooling chamber (2) and isothermal transformation furnace on the equal greenhouse body (3.7)
(4) it is respectively formed with a workpiece on side and passes through mouth；Each workpiece by installing an equal greenhouse partition door on mouth respectively
(3.1)；Equal greenhouse air supply device (3.2), equal greenhouse stirring blower (3.3), equal type greenhouse heating apparatus (3.4) and temperature sense dress
(3.5) are set to be mounted on equal greenhouse body (3.7)；Temperature controller (3.6) setting is external in equal greenhouse body (3.7), and by leading
Line is electrically connected with equal greenhouse air supply device (3.2), equal type greenhouse heating apparatus (3.4) and temperature sensing device (3.5) respectively.
2. dual chamber isothermal normalizing air cooling system according to claim 1, it is characterised in that: the rapid cooling chamber
Each workpiece of body (2.3) by installing a quick cooling chamber partition door (2.1) on mouth in a selectable manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821243196.7U CN208701124U (en) | 2018-08-03 | 2018-08-03 | Dual chamber isothermal normalizing air cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821243196.7U CN208701124U (en) | 2018-08-03 | 2018-08-03 | Dual chamber isothermal normalizing air cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208701124U true CN208701124U (en) | 2019-04-05 |
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ID=65941384
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821243196.7U Withdrawn - After Issue CN208701124U (en) | 2018-08-03 | 2018-08-03 | Dual chamber isothermal normalizing air cooling system |
Country Status (1)
| Country | Link |
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| CN (1) | CN208701124U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108660296A (en) * | 2018-08-03 | 2018-10-16 | 天津鼎元热工工程有限公司 | Dual chamber isothermal normalizing air cooling system |
-
2018
- 2018-08-03 CN CN201821243196.7U patent/CN208701124U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108660296A (en) * | 2018-08-03 | 2018-10-16 | 天津鼎元热工工程有限公司 | Dual chamber isothermal normalizing air cooling system |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190405 Effective date of abandoning: 20190730 |