CN106498143A - A kind of burning optimization on line method and burning optimization on line system for rail - Google Patents
A kind of burning optimization on line method and burning optimization on line system for rail Download PDFInfo
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- CN106498143A CN106498143A CN201610914511.3A CN201610914511A CN106498143A CN 106498143 A CN106498143 A CN 106498143A CN 201610914511 A CN201610914511 A CN 201610914511A CN 106498143 A CN106498143 A CN 106498143A
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- rail
- mixed aerosol
- cooling
- air
- chiller
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/04—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails
-
- 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
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
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- Chemical & Material Sciences (AREA)
- 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)
- Control Of Heat Treatment Processes (AREA)
Abstract
The invention discloses a kind of burning optimization on line method for rail, first by detecting whether rail temperature meets preset temperature range；If, the rail is delivered to Heat treating machine set, in conjunction with air and the advantage of water-cooling process, using the cooling technique under supersaturation mixed aerosol gaseous environment, the Heat treating machine set is made using the mixed aerosol gas formed after water and air mixed aerosol, will be low in the speed that the rail is cooled to 450 550 DEG C of coolings with 25 DEG C/s rate of cooling for cooldown rate control, and then do not result in makes rail generate harmful substance as rate of cooling is too fast, and then affect product quality, in addition, the present invention is cooled down using the mixture of water and air, air or polymer process need not be compressed, and then low production cost, convenient to carry out, being capable of large area use.
Description
Technical field
The application is related to metallurgical technology field Steel-rolling Industry, more particularly to a kind of burning optimization on line method for rail and
Burning optimization on line system.
Background technology
At a high speed, rise and development of the heavy haul railway in countries in the world, the travel speed and axle weight for making train are all greatly improved.
The increase of axle weight necessarily causes the increase of shear stress inside wheel Rail Contact Stresses and rail head, causes rail contact fatigue to damage and increases
Plus, particularly the abrasion of curve and steep gradient location rail, peel off block, conquassation, core wound etc. increase year by year.And China railways are bent
Line bend accounts for the 1/3 of total line, develops wear-resisting, resisting fatigue heat-treated rail and has a extensive future, and is the direction of China's rail development.
At present, full length rail heat treatment is divided into offline and two kinds of techniques of on-line and full-length, offline process high energy consumption, high cost,
Do not recommend, and on-line and full-length Technology for Heating Processing has the advantage that：
(1) energy saving.Online compared with heat-treated offline technique, production process simplifies, and cycle is short, after being rolled using rail
Waste heat carries out rail intensive treatment, it is possible to decrease energy consumption and production cost.
(2) rail service life is improved.Compared with common rail, service life is at least doubled burning optimization on line rail
More than, greatly reduce the replacing amount of rail, and then saved manpower and materials, reduce the impact to environment.
(3) steady quality reliability.Burning optimization on line rail improves its usability compared with offline and common rail
Can, enhance the safety of railway operation.
So, current rail whole audience heat treatment is mainly processed using burning optimization on line technique such as water smoke technique.
And the speed of water smoke cooling is too high, wayward, easily make rail produce adverse tissue.
Content of the invention
Invention provides a kind of burning optimization on line method for rail, cold with the water smoke processing method for solving current
But speed is too fast, wayward, is also easy to produce the problem of adverse tissue.
For solving above-mentioned technical problem, the invention provides a kind of the invention discloses burning optimization on line side for rail
Method, including：
Whether detection rail temperature meets preset temperature range；
If so, the rail is delivered to Heat treating machine set, makes the Heat treating machine set utilize water and air mixed aerosol
The rail is cooled to 450-550 DEG C with 2-5 DEG C/s rate of cooling by the mixed aerosol gas for being formed afterwards.
Preferably, whether the detection rail temperature meets preset temperature range, including：
Whether detection rail temperature meets 760-820 DEG C.
Preferably, the Heat treating machine set includes tandem chiller, each chiller include mixed aerosol device,
Supersaturation humidity measurement instrument, nozzle；
Described the rail is delivered to Heat treating machine set, make the Heat treating machine set using water and air mixed aerosol it
The rail is cooled to 450-550 DEG C with 2-5 DEG C/s rate of cooling by the mixed aerosol gas for being formed afterwards, including：
The mixed aerosol device of each chiller will form mixed aerosol gas, profit after water and air mixed aerosol
The mixed aerosol gas injection is gone out the mixed aerosol device with nozzle, makes the air in the chiller reach satiety
With the air detected in each chiller described by respective supersaturation humidity measurement instrument reaches the saturation of requirement
Afterwards, the rail is made to be cooled to 450-550 DEG C with 2-5 DEG C/s rate of cooling.
Preferably, the chiller is body structure, is respectively provided with the top of the body structure, both sides, bottom
There is mixed aerosol device, each mixed aerosol device is both provided with the supersaturation humidity measurement instrument, the nozzle.
Preferably, the mixing fog activating QI for making the Heat treating machine set using formation after water and air mixed aerosol
The rail is cooled to 450-550 DEG C with 2-5 DEG C/s rate of cooling by body, including：
The Heat treating machine set conveys the rail with 1-1.8 meter per seconds speed, and using the mixed aerosol gas with 2-
The rail is cooled to 450-550 DEG C by 5 DEG C/s rate of cooling.
Preferably, described with 2-5 DEG C/s rate of cooling by the rail cooling after, including：
Detect the temperature of the rail whether in 450-550 DEG C.
Preferably, described the rail is cooled to 450-550 DEG C afterwards with 2-5 DEG C/s rate of cooling, including：
Cold bed is delivered to traversing for the rail to return roller table using traversing stand.
The invention discloses a kind of burning optimization on line system for rail, including：
Temperature-detecting device, for detecting whether rail temperature meets preset temperature range；
Heat treating machine set, meets the preset temperature model for detecting the rail temperature in the temperature-detecting device
After enclosing, using the mixed aerosol gas formed after water and air mixed aerosol, with 2-5 °C/s rate of cooling by the rail
It is cooled to 450-550 DEG C.
Preferably, the Heat treating machine set includes tandem chiller, each chiller include mixed aerosol device,
Supersaturation humidity measurement instrument, nozzle；
The mixed aerosol device of each chiller will form mixed aerosol gas, profit after water and air mixed aerosol
The mixed aerosol gas injection is gone out the mixed aerosol device with nozzle, makes the air in the chiller reach satiety
With the air detected in each chiller described by respective supersaturation humidity measurement instrument reaches the saturation of requirement
Afterwards, the rail is cooled to 450-550 DEG C with 2-5 DEG C/s rate of cooling.
Preferably, the chiller is body structure, is respectively provided with the top of the body structure, both sides, bottom
There is mixed aerosol device, each mixed aerosol device is both provided with the supersaturation humidity measurement instrument, the nozzle.
By one or more technical scheme of the present invention, the invention has the advantages that or advantage：
The invention discloses a kind of burning optimization on line method for rail, first by detecting whether rail temperature meets
Preset temperature range；If so, the rail is delivered to Heat treating machine set, in conjunction with air and the advantage of water-cooling process, is adopted
Cooling technique under supersaturation (water and air) mixed aerosol gaseous environment, makes the Heat treating machine set mixed using water and air
The mixed aerosol gas formed after closing atomization, the rail is being cooled down by cooldown rate control with 2-5 DEG C/s rate of cooling
To 450-550 DEG C.The speed of cooling is low, and then do not result in makes rail generate harmful substance as rate of cooling is too fast, can
Improve product quality.
Further, the technique that the present invention is adopted only needs to common equipment and water smoke is mixed, without to now
There is the water smoke equipment in technology to need compressed air and air compressor machine etc. to compress to form High Voltage water smoke by water smoke, can economize on water
Economize on electricity, saves production cost, is easy to large area to implement and use.
Description of the drawings
Fig. 1 is the burning optimization on line method implementation process figure in the embodiment of the present invention for rail；
Fig. 2 is the structural representation of chiller in the embodiment of the present invention；
Fig. 3 is U71Mn steel schematic diagrams in the embodiment of the present invention；
Fig. 4 is U75V steel schematic diagrams in the embodiment of the present invention.
Specific embodiment
In order that the application the technical staff in the technical field is more clearly understood that the application, below in conjunction with the accompanying drawings,
Technical scheme is described in detail by specific embodiment.
The invention discloses a kind of burning optimization on line method for rail, in conjunction with air and the advantage of water-cooling process, adopts
The cooling technique being used under supersaturation (water and air) mixed aerosol gaseous environment, cooldown rate is controlled with 2-5 DEG C/s
The rail is cooled to 450-550 DEG C by rate of cooling.The speed of cooling is low, and then does not result in and make as rate of cooling is too fast
Rail generates harmful substance, it is possible to increase product quality, in addition, the present invention is cooled down using the mixture of water and air, no
Needs are compressed or are formed polymer etc. technique, and then low production cost, convenient to carry out, being capable of large area use.
Referring to Fig. 1, method of the present invention implementation process is as follows：
Whether S11, detection rail temperature meet preset temperature range.
In specific implementation process, high temperature rail after hot rolling before Heat treating machine set is delivered to by cold bed,
First can detect whether rail temperature meets 760-820 DEG C.Heat treating machine set is sent into if meeting, if being unsatisfactory for, is delivered to which
He.
The rail, if rail temperature meets preset temperature range, is delivered to Heat treating machine set by S12, is made at the heat
Reason unit using the mixed aerosol gas formed after water and air mixed aerosol, with 2-5 DEG C/s rate of cooling by the rail
It is cooled to 450-550 DEG C.
In specific implementation process, the Heat treating machine set includes tandem chiller, and each chiller includes
Mixed aerosol device, supersaturation humidity measurement instrument, nozzle.
More specifically, referring to Fig. 2, the chiller be body structure, the top of the body structure, both sides,
Bottom is respectively arranged with mixed aerosol device 1, and each mixed aerosol device 1 is both provided with the supersaturation humidity measurement instrument, institute
State nozzle 2.
Therefore, the mixed aerosol device of each chiller will form mixing fog activating QI after water and air mixed aerosol
The mixed aerosol gas injection is gone out the mixed aerosol device using nozzle by body, reaches the air in the chiller
Supersaturation is arrived, the air detected in each chiller described by respective supersaturation humidity measurement instrument reaches the full of requirement
After degree, the rail is cooled to 450-550 DEG C with 2-5 DEG C/s rate of cooling.
In actual applications, rail initial temperature, the speed of Heat treating machine set, cool time etc. impact can be considered
The factor, rail are cooled down in 2-5 DEG C/s by the control of Heat treating machine set rate of cooling, until being cooled to 450-550 DEG C.
As the length of chiller, cool time etc. are all fixed, and then the present invention can utilize the heat treatment
Unit conveys the rail with 1-1.8 meter per seconds speed, and using the mixed aerosol gas with 2-5 DEG C/s rate of cooling by institute
State rail and be cooled to 450-550 DEG C.
Preferably, the preferred process speed of Heat treating machine set is：1 meter per second or 1.2 meter per seconds or 1.5 meter per seconds.
In actual applications, the speed of Heat treating machine set, the length of each chiller, cool time etc. are being provided with
After factor of influence, actually rail finally should be cooled to 450-550 DEG C.
But, in order to further accurately confirm the chilling temperature of rail, described will be described with 2-5 DEG C/s rate of cooling
After rail cooling, can also further detect the temperature of the rail whether in 450-550 DEG C.
As a kind of optional embodiment, the rail is cooled to 450-550 DEG C described with 2-5 DEG C/s rate of cooling
Afterwards, can also utilize traversing stand by traversing for the rail to return roller table, be delivered to cold bed.
Same inventive concept is based on, the invention also discloses a kind of burning optimization on line system for rail, including：
Temperature-detecting device, for detecting whether rail temperature meets preset temperature range；
Heat treating machine set, meets the preset temperature model for detecting the rail temperature in the temperature-detecting device
After enclosing, using the mixed aerosol gas formed after water and air mixed aerosol, with 2-5 DEG C/s rate of cooling by the rail
It is cooled to 450-550 DEG C.
The Heat treating machine set includes tandem chiller, and each chiller includes mixed aerosol device, supersaturation
Humidity measurement instrument, nozzle；
More specifically, the chiller is body structure, in the top of the body structure, both sides, bottom difference
Mixed aerosol device is provided with, each mixed aerosol device is both provided with the supersaturation humidity measurement instrument, the nozzle.
The mixed aerosol device of each chiller will form mixed aerosol gas, profit after water and air mixed aerosol
The mixed aerosol gas injection is gone out device with nozzle, makes the air in the chiller reach supersaturation, by respective
The air that detects in each chiller described of supersaturation humidity measurement instrument reach the saturation of requirement after, rail is with 2-5
DEG C/s rate of cooling is cooled to 450-550 DEG C.
As shown in the above, implementation principle of the invention, first by water and air mixed aerosol after, make air in casing
Supersaturation, after air reaches requirement degree of supersaturation in the supersaturation humidity measurement instrument detection case body, hot rail passes through casing
Cooled down, form phase transformation, obtain fine metallographic structure.
For example, the rail property after this technology heat treatment：
U71Mn steel is referring to table 1, and specific schematic diagram is referring to Fig. 3.
In fig. 3 it can be seen that the second row is to obtain product test index, the third line is standard, it can be seen that
By the heat treatment method, the product for obtaining is functional.
| Numbering | Tread hardness (HB) | Tensile strength (MPa_) | Elongation percentage |
| 1 | 341,337,332,338,340 | 1175 | 12% |
| Standard is required | 320～380 | ≥1080 | >=10% |
Table 1
U75V steel is referring to table 2, and specific schematic diagram is referring to Fig. 4.
In figure 4, it can be seen that the second row is to obtain product test index, the third line is standard, it can be seen that
By the heat treatment method, the product for obtaining is functional.
| Numbering | Tread hardness (HB) | Tensile strength (MPa_) | Elongation percentage |
| 1 | 373,370,375,376,371 | 1233 | 13% |
| Standard is required | 340～400 | ≥1180 | >=10% |
Table 2
By one or more embodiment of the present invention, the invention has the advantages that or advantage：
The invention discloses a kind of burning optimization on line method for rail, first by detecting whether rail temperature meets
Preset temperature range；If so, the rail is delivered to Heat treating machine set, in conjunction with air and the advantage of water-cooling process, is adopted
Cooling technique under supersaturation (water and air) mixed aerosol gaseous environment, makes the Heat treating machine set mixed using water and air
The mixed aerosol gas formed after closing atomization, the rail is being cooled down by cooldown rate control with 2-5 DEG C/s rate of cooling
To 450-550 DEG C.The speed of cooling is low, and then do not result in makes rail generate harmful substance as rate of cooling is too fast, and then
Product quality is affected, in addition, the present invention is cooled down using the mixture of water and air, it is not necessary to be compressed or formed and be poly-
Compound etc. technique, and then low production cost, convenient to carry out, being capable of large area use.
Although having been described for the preferred embodiment of the application, one of ordinary skilled in the art once knows substantially
Creative concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to wrap
Include preferred embodiment and fall into the had altered of the application scope and change.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the application to the application
God and scope.So, if these modifications of the application and modification belong to the scope of the application claim and its equivalent technologies
Within, then the application is also intended to comprising these changes and modification.
Claims (10)
1. a kind of burning optimization on line method for rail, it is characterised in that include：
Whether detection rail temperature meets preset temperature range；
If so, the rail is delivered to Heat treating machine set, the Heat treating machine set is made using after water and air mixed aerosol
The rail is cooled to 450-550 DEG C with 2-5 DEG C/s rate of cooling by the mixed aerosol gas of formation.
2. the method for claim 1, it is characterised in that whether the detection rail temperature meets preset temperature range,
Including：
Whether detection rail temperature meets 760-820 DEG C.
3. the method for claim 1, it is characterised in that the Heat treating machine set includes tandem chiller, each
Chiller includes mixed aerosol device, supersaturation humidity measurement instrument, nozzle；
Described the rail is delivered to Heat treating machine set, make the Heat treating machine set using shape after water and air mixed aerosol
Into mixed aerosol gas, the rail is cooled to 450-550 DEG C with 2-5 DEG C/s rate of cooling, including：
The mixed aerosol device of each chiller will form mixed aerosol gas after water and air mixed aerosol, using spray
The mixed aerosol gas injection is gone out the mixed aerosol device by mouth, makes the air in the chiller reach supersaturation,
After air in each chiller described in being detected by respective supersaturation humidity measurement instrument reaches the saturation of requirement, institute
State rail 450-550 DEG C is cooled to 2-5 DEG C/s rate of cooling.
4. method as claimed in claim 3, it is characterised in that the chiller is body structure, in the body structure
Top, both sides, bottom be respectively arranged with mixed aerosol device, each mixed aerosol device is both provided with the supersaturation humidity
Detector, the nozzle.
5. the method for claim 1, it is characterised in that described make the Heat treating machine set utilize water and air mixing fog
The rail is cooled to 450-550 DEG C with 2-5 DEG C/s rate of cooling by the mixed aerosol gas formed after change, including：
The Heat treating machine set conveys the rail with 1-1.8 meter per seconds speed, and using the mixed aerosol gas with 2-5 DEG C/
The rail is cooled to 450-550 DEG C by s rate of cooling.
6. the method for claim 1, it is characterised in that described the rail is cooled down by it with 2-5 DEG C/s rate of cooling
Afterwards, including：
Detect the temperature of the rail whether in 450-550 DEG C.
7. the method for claim 1, it is characterised in that described the rail is cooled to 2-5 DEG C/s rate of cooling
450-550 DEG C is afterwards, including：
Cold bed is delivered to traversing for the rail to return roller table using traversing stand.
8. a kind of burning optimization on line system for rail, it is characterised in that include：
Temperature-detecting device, for detecting whether rail temperature meets preset temperature range；
Heat treating machine set, for the temperature-detecting device detect the rail temperature meet the preset temperature range it
Afterwards, using the mixed aerosol gas formed after water and air mixed aerosol, the rail is cooled down with 2-5 °C/s rate of cooling
To 450-550 DEG C.
9. system as claimed in claim 8, it is characterised in that the Heat treating machine set includes tandem chiller, each
Chiller includes mixed aerosol device, supersaturation humidity measurement instrument, nozzle；
The mixed aerosol device of each chiller will form mixed aerosol gas after water and air mixed aerosol, using spray
The mixed aerosol gas injection is gone out the mixed aerosol device by mouth, makes the air in the chiller reach supersaturation,
After air in each chiller described in being detected by respective supersaturation humidity measurement instrument reaches the saturation of requirement, institute
State rail 450-550 DEG C is cooled to 2-5 DEG C/s rate of cooling.
10. system as claimed in claim 8, it is characterised in that the chiller is body structure, in the body structure
Top, both sides, bottom be respectively arranged with mixed aerosol device, each mixed aerosol device is both provided with the supersaturation humidity
Detector, the nozzle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610914511.3A CN106498143B (en) | 2016-10-20 | 2016-10-20 | A kind of burning optimization on line method and burning optimization on line system for rail |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610914511.3A CN106498143B (en) | 2016-10-20 | 2016-10-20 | A kind of burning optimization on line method and burning optimization on line system for rail |
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| CN106498143B CN106498143B (en) | 2018-10-02 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107541596A (en) * | 2017-08-28 | 2018-01-05 | 芜湖中铁科吉富轨道有限公司 | A kind of burning optimization on line technique of U75V rail |
| CN108411089A (en) * | 2018-03-20 | 2018-08-17 | 包头钢铁（集团）有限责任公司 | A kind of production method of European standard R350HT burning optimization on line rail |
| CN108504838A (en) * | 2018-03-20 | 2018-09-07 | 包头钢铁（集团）有限责任公司 | A kind of production method of European standard R350LHT burning optimization on line rail |
| CN109182715A (en) * | 2018-09-19 | 2019-01-11 | 武汉钢铁有限公司 | Rail burning optimization on line method for controlling planeness |
| CN109402352A (en) * | 2018-12-18 | 2019-03-01 | 四川省广汉华夏铁路器材有限公司 | A kind of technique of press quenching manufacture guard rail U-steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107541596A (en) * | 2017-08-28 | 2018-01-05 | 芜湖中铁科吉富轨道有限公司 | A kind of burning optimization on line technique of U75V rail |
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| CN108411089A (en) * | 2018-03-20 | 2018-08-17 | 包头钢铁（集团）有限责任公司 | A kind of production method of European standard R350HT burning optimization on line rail |
| CN108504838A (en) * | 2018-03-20 | 2018-09-07 | 包头钢铁（集团）有限责任公司 | A kind of production method of European standard R350LHT burning optimization on line rail |
| CN109182715A (en) * | 2018-09-19 | 2019-01-11 | 武汉钢铁有限公司 | Rail burning optimization on line method for controlling planeness |
| CN109402352A (en) * | 2018-12-18 | 2019-03-01 | 四川省广汉华夏铁路器材有限公司 | A kind of technique of press quenching manufacture guard rail U-steel |
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| Publication number | Publication date |
|---|---|
| CN106498143B (en) | 2018-10-02 |
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