CN107988464A - A kind of online sensing heating control method of rail - Google Patents
A kind of online sensing heating control method of rail Download PDFInfo
- Publication number
- CN107988464A CN107988464A CN201711403811.6A CN201711403811A CN107988464A CN 107988464 A CN107988464 A CN 107988464A CN 201711403811 A CN201711403811 A CN 201711403811A CN 107988464 A CN107988464 A CN 107988464A
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- Prior art keywords
- rail
- sensing heating
- web
- control method
- heating control
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of online sensing heating control method of rail, including sensing heating is implemented at the steel rail web position to going out heat-treatment lines, and web of the rail position heating-up temperature is 600~680 DEG C.The online sensing heating control method of rail provided by the invention carries out the production of rail, and the degree of supercooling after rail burning optimization on line is inhibited by web of the rail compensation heating, extends rail in the residence time in perlitic transformation area, avoids the generation of abnormal martensitic structure；Web of the rail computer heating control can coordinate the temperature difference between rail head and the flange of rail, so as to reduce rail internal stress, and then reduce steel rail straightening cracking risk, also reduce the internal stress after rail is rectified.This method simple possible, suitable for industrialized production.
Description
Technical field
The present invention relates to metallurgical technology field, more particularly to a kind of rail burning optimization on line control method.
Background technology
As railway transportation is to high speed, heavy duty development, the intensity and hardness of rail in railway transportation are proposed increasingly
High requirement.At present, the obdurability of rail is generally improved by heat-treating methods.During heat-treated rail, to obtain
Good obdurability, it is necessary to heat-treatment of rail hardened layer is obtained whole fine pearlite tissues, meanwhile, in the tunneling boring of rail
On must not have a martensitic structure, the presence of martensitic structure will influence the stability of heat-treated rail product quality and making for rail
Use the service life.
Carbon content is higher in pearlite steel rail, and the alloying element such as generally use manganese, chromium increases its quenching degree, causes in rail
It is easy to abnormal martensitic structure occur during heat treatment pressure cooling, easily makes rail crack initiation, induce and split in early days
Line, influences the service life of rail；And the internal stress of rail rail in irregular shape is also larger.Therefore, abnormal geneva is eliminated
Body tissue and reduction rail internal stress become the controlling difficulties in heat-treatment of rail cooling procedure.At present, heat-treatment of rail cools down
Method is usually that rail is cooled down with the cooling medium such as wind, water mist, wind+water mist, and cooling control technique is different, purpose
All it is rail is obtained fine pearlite metallographic structure by heat treatment.Existing disclosed patent CN106086370A,
In CN86100209A, there is provided the method for reducing and reducing rail residual stress.It is not directed in the prior art and publication
How the abnormal structure being likely to occur to be controlled by by being heat-treated cooling technique means.
In view of the intensity and hardness to rail in railway transportation also need further to improve, and to eliminating rail exception group
Knit, reducing rail thermal stress aspect, there are raising demand；Therefore, those skilled in the art is directed to developing a kind of rail online
Sensing heating control method, to improve above-mentioned deficiency of the prior art.
The content of the invention
In view of the drawbacks described above of the prior art, the technical problems to be solved by the invention be eliminate rail abnormal structure,
Reduce rail thermal stress.
To achieve the above object, the present invention provides a kind of online sensing heating control method of rail, including to going out Re Chu
Sensing heating is implemented at the steel rail web position of lineation, and web of the rail position heating-up temperature is 600~680 DEG C.
Further, during the sensing heating, continuously transmit and heat, hot transfer rate is 0.2~1.5m/s；
Further, the sensing heating time is 0~40 second；
In the better embodiment of the present invention, the hot transfer rate is 0.5~1.2m/s；
In another better embodiment of the present invention, the hot transfer rate is 0.5m/s；
In another better embodiment of the present invention, the hot transfer rate is 1.2m/s；
In another better embodiment of the present invention, the hot transfer rate is 1m/s；
In another better embodiment of the present invention, web of the rail position heating-up temperature is 600 DEG C；
In another better embodiment of the present invention, web of the rail position heating-up temperature is 650 DEG C；
In another better embodiment of the present invention, web of the rail position heating-up temperature is 680 DEG C；
In another better embodiment of the present invention, the sensing heating time is 20~40 seconds；
In another better embodiment of the present invention, the sensing heating time is 20 seconds；
In another better embodiment of the present invention, the sensing heating time is 40 seconds；
In another better embodiment of the present invention, the main chemical of the rail is：By weight percentage,
Including 0.65~1.05%C, 0.50~0.90%Si, 0.80~1.50%Mn, 0~1.00%Cr, remaining for iron, Nb, V, Ti,
Other microalloy elements such as RE and impurity.
Using above scheme, a kind of online sensing heating control method of rail disclosed by the invention, has following technology effect
Fruit：
The online sensing heating control method of rail provided by the invention, is damaged by compensating temperature of the rail in transmitting procedure
Lose, therefore the head to rail or head and bottom progress sensing heating so that the rail temperature into heat-treatment lines maintains
The temperature range (austenitic temperature section) needed, and make the being consistent property of temperature of rail longitudinal direction, therefore, sensing heating
Device is located at the entrance front end of heat-treatment of rail line.The technical solution adopted by the present invention to solve the technical problems is：Online sense
Answer heating unit to be located at the exit site of heat-treatment of rail line, by the web of the rail position of sensing heating rail, eliminate steel rail web
And the abnormal structure of upper and lower trigonum, while reduce rail internal stress.；
The online sensing heating control method of rail provided by the invention, avoids the web of the rail and upper and lower trigonum from producing abnormal group
Knit, meanwhile, the present inventor, which studies, to be found to heat the thermal stress that can also coordinate between rail head and the flange of rail by the web of the rail, reduces rail
Internal stress, avoids steel rail straightening from cracking；
The online sensing heating control method of rail provided by the invention, the remnants reduced after heat-treated rail aligning should
Power, can reduce the residual stress of 50~150MPa, avoid the aligning of heat-treated rail from cracking, meanwhile, improve heat-treated rail
Service safety；
The online sensing heating control method of rail provided by the invention, is applicable to the production of the rail of Multiple components, easily
In the popularization of method；
In conclusion the online sensing heating control method of rail provided by the invention carries out the production of rail, pass through the web of the rail
Compensation heating inhibits the degree of supercooling after rail burning optimization on line, extends rail in the residence time in perlitic transformation area, avoids
The generation of abnormal martensitic structure；Web of the rail computer heating control can coordinate the temperature difference between rail head and the flange of rail, so as to reduce steel
Rail internal stress, and then steel rail straightening cracking risk is reduced, also reduce the internal stress after rail is rectified；The method of the present invention is suitable for being easy to
Generating region segregation contains manganese, chromium steel rail, thus the heat-treated rail for developing high intensity levels has directive significance.The party
Method simple possible, suitable for industrialized production.
A kind of online sensing heating control method of rail, is national project disclosed in technical solution of the present invention, by country's weight
Point research and development programme support, 2017YFB0304500 (National Key R＆D Program of China,
2017YFB0304500)。
It is described further below with reference to the technique effect of design of the attached drawing to the present invention, concrete structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
Brief description of the drawings
Fig. 1 is the web of the rail and upper and lower trigonum tissue micrograph of the embodiment of the present invention 1 and comparative example 1；
Fig. 2 is the web of the rail and upper and lower trigonum tissue micrograph of the embodiment of the present invention 2 and comparative example 2；
Embodiment
Multiple preferred embodiments of the present invention are introduced below with reference to Figure of description, make its technology contents more clear and just
In understanding.The present invention can be emerged from by many various forms of embodiments, and protection scope of the present invention not only limits
The embodiment that Yu Wenzhong is mentioned.
Embodiment 1,
The online sensing heating control method of rail using the present invention, is to main chemical：By weight percentage,
Including 0.65~1.05%C, 0.50~0.90%Si, 0.80~1.50%Mn, 0~1.00%Cr, remaining for iron, Nb, V, Ti,
The rail of other microalloy elements such as RE and impurity carries out online sensing heating production rail.
Concrete operations are：After rail accelerates cooling online, to implementing when going out heat-treatment lines to steel rail web position
Continuous quick sensing heating, heating-up temperature are 600 DEG C, and heating time is 40 seconds, rate of heat addition 1m/s.
Embodiment 2,
The online sensing heating control method of rail using the present invention, is to main chemical：By weight percentage,
Including 0.65~1.05%C, 0.50~0.90%Si, 0.80~1.50%Mn, 0~1.00%Cr, remaining for iron, Nb, V, Ti,
The rail of other microalloy elements such as RE and impurity carries out online sensing heating production rail.
Concrete operations are：After rail accelerates cooling online, to implementing when going out heat-treatment lines to steel rail web position
Continuous quick sensing heating, heating-up temperature are 680 DEG C, and heating time is 20 seconds, rate of heat addition 0.5m/s.
Embodiment 3,
The online sensing heating control method of rail using the present invention, is to main chemical：By weight percentage,
Including 0.65~1.05%C, 0.50~0.90%Si, 0.80~1.50%Mn, 0~1.00%Cr, remaining for iron, Nb, V, Ti,
The rail of other microalloy elements such as RE and impurity carries out online sensing heating production rail.
Concrete operations are：After rail accelerates cooling online, to implementing when going out heat-treatment lines to steel rail web position
Continuous quick sensing heating, heating-up temperature are 650 DEG C, and heating time is 25 seconds, rate of heat addition 1.2m/s.
Comparative example 4,
Using the identical heat treatment process of embodiment 1, do not controlled using to the online sensing heating of steel rail web, produce steel
Rail.
Comparative example 5,
Using the identical heat treatment process of embodiment 2, do not controlled using to the online sensing heating of steel rail web, produce steel
Rail.
Comparative example 6,
Using the identical heat treatment process of embodiment 3, do not controlled using to the online sensing heating of steel rail web, produce steel
Rail.
Test example 7,
(1) to embodiment 1, embodiment 2, and the production of corresponding comparative example 4, comparative example 5 rail upper trigonum, under
Trigonum and steel rail web area carry out microstructure observation's detection respectively；
As depicted in figs. 1 and 2, comparative example 1,2 be do not use online sensing heating control method steel rail web and up and down
The part of the metallographic structure photo at trigonum position, the web of the rail and upper and lower trigonum has abnormal martensitic structure；
Embodiment 1,2 is that steel rail web and up and down is employed after line sensing heating control method under identical heat treatment process
The metallographic structure photo at trigonum position, it is original in comparative example 1,2 abnormal group occur that the deeper position of color is corresponding in figure
The position knitted, amplifying observation show that abnormal structure has had turned to pearlitic structrure；
(2) sensing heating production is implemented to steel rail web position using online sensing heating control method to embodiment 1~3
When, temperature is monitored to rail；
It is real after in line sensing heating control method to steel rail web position implementation sensing heating as shown in table 1~3
The temperature between rail head and the flange of rail can have been coordinated by the web of the rail to two side diffusion of rail head and the flange of rail by applying the rail temperature of example 1~3
Difference, is conducive to reduce rail internal stress and reduces steel rail straightening cracking risk；
The web of the rail sensing heating experiment temperature measurement data of table 1, embodiment 1
The web of the rail sensing heating experiment temperature measurement data of table 2, embodiment 2
The web of the rail sensing heating experiment temperature measurement data of table 3, embodiment 3
(3) sensing heating production is implemented to steel rail web position using online sensing heating control method to embodiment 1~3
Rail and comparative example 4~6 not using to steel rail web online sensing heating control production rail, carry out mechanical property
Detection contrast；
As shown in table 4, using line sensing heating control method to steel rail web position implement sensing heating after, with contrast
Example 4~5 is compared, and the properties at the rail head of rail position that embodiment 1~3 produces are satisfied by standard requirement, flange of rail residual stress
50~150MPa can be reduced.
Table 4, mechanics properties testing
In conclusion the online sensing heating control method of the embodiment of the present invention, avoids the generation of abnormal martensitic structure,
Coordinate the temperature difference between rail head and the flange of rail, reduce the internal stress after rail is rectified, be conducive to improve rail product quality
The service life of stability and rail.
The online sensing heating control method of other embodiment of the present invention has beneficial effect similar to above.
Preferred embodiment of the invention described in detail above.It should be appreciated that the ordinary skill of this area is without wound
The property made work can conceive according to the present invention makes many modifications and variations.Therefore, all technician in the art
Pass through the available technology of logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Scheme, all should be in the protection domain being defined in the patent claims.
Claims (6)
1. a kind of online sensing heating control method of rail, it is characterised in that including the steel rail web position to going out heat-treatment lines
Implement sensing heating, web of the rail position heating-up temperature is 600~680 DEG C.
2. control method as claimed in claim 1, it is characterised in that during the sensing heating, hot transfer rate for 0.2~
1.5m/s。
3. control method as claimed in claim 1, it is characterised in that the sensing heating time is 0~40 second.
4. control method as claimed in claim 2, it is characterised in that the hot transfer rate is 0.5~1.2m/s.
5. control method as claimed in claim 3, it is characterised in that the sensing heating time is 20~40 seconds.
6. control method as claimed in claim 1, it is characterised in that the main chemical of the rail is：Percentage by weight
Than meter, including 0.65~1.05%C, 0.50~0.90%Si, 0.80~1.50%Mn, 0~1.00%Cr, remaining for iron, Nb,
V, other microalloy elements such as Ti, RE and impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711403811.6A CN107988464A (en) | 2017-12-22 | 2017-12-22 | A kind of online sensing heating control method of rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711403811.6A CN107988464A (en) | 2017-12-22 | 2017-12-22 | A kind of online sensing heating control method of rail |
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Family
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| CN201711403811.6A Pending CN107988464A (en) | 2017-12-22 | 2017-12-22 | A kind of online sensing heating control method of rail |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110093481A (en) * | 2019-05-24 | 2019-08-06 | 上海工程技术大学 | A kind of track process for quenching based on induction heating |
| CN111558682A (en) * | 2020-03-31 | 2020-08-21 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Induction heating and pressing molding device for special-shaped steel rail with symmetrical section and quality monitoring system |
| CN115505713A (en) * | 2022-09-16 | 2022-12-23 | 包头钢铁（集团）有限责任公司 | Heat treatment process for reducing residual stress of Baimi online heat treatment bainite steel rail |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100209A (en) * | 1985-01-18 | 1986-07-16 | 克鲁普·斯塔尔股份公司 | Reduce the method for roll-in straightening of kinked rail internal stress |
| CN1154413A (en) * | 1995-09-20 | 1997-07-16 | 索格拉伊公司 | Process for heat treatment of steel rail |
| CN102444058A (en) * | 2011-08-30 | 2012-05-09 | 孙健 | Radiant railway switch de-icing/snow removing system |
| CN105256673A (en) * | 2015-09-23 | 2016-01-20 | 北京东奥工贸有限公司 | Rail heating and thermal insulating device |
-
2017
- 2017-12-22 CN CN201711403811.6A patent/CN107988464A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100209A (en) * | 1985-01-18 | 1986-07-16 | 克鲁普·斯塔尔股份公司 | Reduce the method for roll-in straightening of kinked rail internal stress |
| CN1154413A (en) * | 1995-09-20 | 1997-07-16 | 索格拉伊公司 | Process for heat treatment of steel rail |
| CN102444058A (en) * | 2011-08-30 | 2012-05-09 | 孙健 | Radiant railway switch de-icing/snow removing system |
| CN105256673A (en) * | 2015-09-23 | 2016-01-20 | 北京东奥工贸有限公司 | Rail heating and thermal insulating device |
Non-Patent Citations (1)
| Title |
|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110093481A (en) * | 2019-05-24 | 2019-08-06 | 上海工程技术大学 | A kind of track process for quenching based on induction heating |
| CN111558682A (en) * | 2020-03-31 | 2020-08-21 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Induction heating and pressing molding device for special-shaped steel rail with symmetrical section and quality monitoring system |
| CN115505713A (en) * | 2022-09-16 | 2022-12-23 | 包头钢铁（集团）有限责任公司 | Heat treatment process for reducing residual stress of Baimi online heat treatment bainite steel rail |
| CN115505713B (en) * | 2022-09-16 | 2023-09-26 | 包头钢铁（集团）有限责任公司 | Heat treatment process for reducing residual stress of hundred-meter online heat-treated bainitic steel rail |
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