CN106048175B - A kind of turnout rail and preparation method thereof - Google Patents
A kind of turnout rail and preparation method thereof Download PDFInfo
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- CN106048175B CN106048175B CN201610543903.3A CN201610543903A CN106048175B CN 106048175 B CN106048175 B CN 106048175B CN 201610543903 A CN201610543903 A CN 201610543903A CN 106048175 B CN106048175 B CN 106048175B
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- rail
- cooling
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- turnout rail
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Classifications
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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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
-
- 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
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- 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
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
-
- 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
- C21D2211/002—Bainite
Abstract
The present invention relates to railway territory, discloses a kind of turnout rail and preparation method thereof, and the steel billet that this method uses contains C：0.2 0.3wt%, Si：1.2 1.8wt%, Mn：1.8 2.5wt%, Cr：1.3 1.6wt% and Fe, wherein, Mn and Cr total content are 3.2 3.7wt%, with reference to specific accelerated cooling process, prepare the turnout rail with excellent strength-toughness energy.In a preferred embodiment, it is low to prepare cost containing a small amount of (below 0.01wt%) or without expensive alloying elements such as Mo, Ni, V and Nb in turnout rail of the invention.
Description
Technical field
The present invention relates to railway territory, in particular it relates to a kind of turnout rail and preparation method thereof.
Background technology
Military service performance of the great-leap-forward development of railway to rail proposes requirements at the higher level, and conventional pearlitic rail is after for many years
Development has been become better and approaching perfection day by day, and circuit, which is on active service, to be shown, pearlite steel rail has an excellent abrasion resistance properties, but contact resistance fatigue behaviour
Relative deficiency, in particular with the increase year by year of China railways freight volume and traffic density, rail fatigue hurt progressively turns into shadow
Ring the primary factor of rail service life.Research shows that bainite structure is applied into rail field can effectively solve rail
Fatigue defect problem.Since the nineties in last century, China has carried out in bainite rail field to be furtherd investigate and achieves rich
Large achievement in research.However, compared to pearlite steel rail, it is obvious poor that bainite rail then exists in terms of cost with economy
Away from.Common pearlite steel rail generally use carbon content 0.65-0.95 weight % high-carbon content design, is aided with appropriate Si, Mn
Element, and choose whether to add the elements such as a small amount of Cr, V, Nb in steel as needed, alloying cost is relatively low, possesses big rule
The basis of mould popularization and application.By contrast, the precious alloy such as alloying element content particularly Mo, Ni, V, Nb in bainite rail
Constituent content is significantly higher, and purpose based on the bainite structure being fined is obtained under conditions of air cooling after rolling to reach, by
In expensive, this popularization and application with premium properties rail are limited.
The content of the invention
The purpose of the present invention is the defects of overcoming prior art to prepare high bainite turnout rail cost and poor performance, there is provided one
Kind turnout rail and preparation method thereof.
The present inventor has found under study for action, using appropriate Controlled cooling process, by strong refined crystalline strengthening
Effect, the tough combination property of turnout rail can not only be greatly improved, moreover it is possible to steel is greatly reduced under conditions of equal performance is obtained
The content of the expensive alloying elements such as middle alloying element, particularly Mo, Ni, V, Nb, i.e., using the rolling waste heat of turnout rail, pass through essence
True Controlled cooling process, the effect of expensive alloying elements performance can be met or exceeded.
Thus, the invention provides a kind of method for preparing turnout rail, wherein, this method comprises the following steps：
(1) hot rolling contains C：0.2-0.3wt%, Si：1.2-1.8wt%, Mn：1.8-2.5wt%, Cr：1.3-1.6wt%
Turnout rail is formed with Fe steel billet and carries out natural cooling, wherein, Mn and Cr total content are 3.2-3.7wt%；
(2) when the rail head skin temperature of the turnout rail is down to 800 DEG C, respectively to the rail head tread center of turnout rail and
Rail head both sides, which apply cooling medium, makes turnout rail carry out first stage acceleration cooling with 10-20 DEG C/s cooling velocity；
(3) when rail head tread central temperature is down to 400-420 DEG C, while the rail head to turnout rail and flange of rail application cooling
Medium makes turnout rail carry out second stage acceleration cooling with 5-8 DEG C/s cooling velocity, accelerates cooling in the second stage
During, the cooling velocity in the long leg siding track rostral face of the turnout rail higher than short-leg siding track rostral face 1-2 DEG C of cooling velocity/
s；
(4) when rail head tread central temperature is down to 200-240 DEG C, stopping second stage acceleration cooling is simultaneously empty by turnout rail
It is cooled to room temperature.
Present invention also offers the turnout rail prepared by methods described.
The present invention prepares the turnout rail with higher comprehensive performance by the content and cooling technique that control alloying element,
The main alloy element of the turnout rail is C, Si, Mn and Cr, according to a kind of preferred embodiment of the present invention, the rail
In without the expensive alloying elements such as Mo, Ni, V, Nb, it is low to prepare cost.Also, turnout rail prepared by the method for the invention is with thin
Change based on bainite, while the heterogeneous structure comprising a small amount of martensite and retained austenite, rail head tunneling boring hardness are evenly distributed,
It is suitable for applying as heavy haul railway track switch after cutting Milling Machining." a small amount of " is contained relative to refining bainite in turnout rail
For amount.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Embodiment
The embodiment of the present invention is described in detail below.It is it should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The end points of disclosed scope and any value are not limited to the accurate scope or value herein, these scopes or
Value should be understood to comprising the value close to these scopes or value.For number range, between the endpoint value of each scope, respectively
It can be combined with each other between the endpoint value of individual scope and single point value, and individually between point value and obtain one or more
New number range, these number ranges should be considered as specific open herein.
The invention provides a kind of preparation method of turnout rail, wherein, this method may comprise steps of：
(1) hot rolling contains C：0.2-0.3wt%, Si：1.2-1.8wt%, Mn：1.8-2.5wt%, Cr：1.3-1.6wt%
Turnout rail is formed with Fe steel billet and carries out natural cooling, wherein, Mn and Cr total content are 3.2-3.7wt%；
(2) when the rail head skin temperature of the turnout rail is down to 800 DEG C, respectively to the rail head tread center of turnout rail and
Rail head both sides, which apply cooling medium, makes turnout rail carry out first stage acceleration cooling with 10-20 DEG C/s cooling velocity；
(3) when rail head tread central temperature is down to 400-420 DEG C, while the rail head to turnout rail and flange of rail application cooling
Medium makes turnout rail carry out second stage acceleration cooling with 5-8 DEG C/s cooling velocity, accelerates cooling in the second stage
During, the cooling velocity in the long leg siding track rostral face of the turnout rail higher than short-leg siding track rostral face 1-2 DEG C of cooling velocity/
s；
(4) when rail head tread central temperature is down to 200-240 DEG C, stopping second stage acceleration cooling is simultaneously empty by turnout rail
It is cooled to room temperature.
The reason for main alloy element content is limited to above range in steel billet described below：
Carbon (C) is to obtain required strong hardness and the most important element of comprehensive mechanical property.When carbon content is less than 0.2wt%
When, strengthening effect can not be given full play to, causes turnout rail strong hardness too low, and then the abrasion resistance properties of turnout rail can not be ensured；
When carbon content is higher than 0.3wt%, after accelerated cooling process, the intensity index of turnout rail is too high and toughness plasticity is too low, no
Beneficial to the service safety of turnout rail.Therefore, carbon content is limited to 0.2-0.3wt%.
Silicon (Si) is generally present in ferrite as the main adding elements in steel with solution, it is possible to increase tissue
Intensity.When silicone content is less than 1.2wt%, can not effectively suppress in steel it is thick, in discontinuously arranged Carbide Precipitation, can not
Obtain non-carbide bainitic steel；When silicone content is higher than 1.8wt%, to the microstructure and property of turnout rail without significantly improving, together
Shi Zengjia track switches track surface produces the probability of defect.Therefore, silicone content is limited to 1.2-1.8wt%.
Manganese (Mn) can significantly reduce bainite structure and start transition temperature, increase the hardness of carbide, particularly this hair
In bright under conditions of Mo is not added, Mn is added to as main alloy element in steel.When manganese content is less than 1.8wt%,
The positive role of bainitic steel is difficult to reach；When manganese content is higher than 2.5wt%, the fatigue behaviour of turnout rail significantly reduces；
Meanwhile the degree of segregation of steel is significantly increased, martensitic structure is easily formed under follow-up cooling condition, is unfavorable for the military service of turnout rail
Security.Therefore, manganese content is limited to 1.8-2.5wt%.
Chromium (Cr) can promote C curve to move to right and increase the quenching degree of turnout rail, equally be the weight in bainite turnout rail
Want addition element.Under conditions of not adding Mo in steel billet, chromium plays simultaneously forces down bainite transformation temperature and raising track switch
The purpose of rail abrasion resistance properties.When chromium content is less than 1.3wt%, its effect in turnout rail is difficult to fully demonstrate；Work as chromium
When content is higher than 1.6wt%, the carbon be advantageous in steel forms complicated carbide, although being beneficial to the raising of polishing machine, together
When can deteriorate the toughness plasticity of turnout rail.Therefore, chromium content is limited to 1.3-1.6wt%.
To ensure that turnout rail of the present invention obtains excellent military service performance, Mn and Cr total content need to meet 3.2-
3.7wt%.Even if reason is using rolling rear accelerated cooling process, to ensure to obtain in continuous cooling process as more as possible and refining
Bainite structure, still need to ensure turnout rail in Mn and Cr constituent contents within the specific limits.When Mn and Cr total content are less than
During 3.2wt%, even if using quick cooling, it can not also completely inhibit pro-eutectoid ferrite in steel and separate out, be unable to reach the present invention
Purpose；When Mn and Cr total content is higher than 3.7wt%, in cooling procedure, a large amount of carbon will be separated out on ferrite matrix
Compound, while more serious segregation will be produced, equally it is unable to reach the purpose of the present invention.Therefore, Mn and Cr total content needs
Meet 3.2-3.7wt%.
According to the present invention, it was found by the inventors of the present invention that being controlled when by the component content of the steel billet in above-mentioned composition model
In enclosing, and the cooling technique combined in the method described in the present invention can obtain tough high comprehensive performance and lower-cost road
Switch track.Wherein it is preferred to C can be contained in the steel billet (on the basis of the gross weight of the steel billet)：0.28-0.3wt%,
Si：1.5-1.6wt%, Mn：2.15-2.4wt%, Cr：1.4-1.5wt%, Mn and Cr total content are 3.6-3.7wt%.
According to the present invention, can also there are P and S in the steel billet.P content can be 0.011-0.014wt%, S's
Content can be 0.002-0.004wt%.Main component in the steel billet is Fe, and the content of the Fe can be 94-
95wt%.
According to the present invention, the total content of the expensive alloying elements in the steel billet is in below 0.01wt%, the valuable conjunction
Gold element includes Mo, Ni, V and Nb.Under preferable case, expensive alloying elements are free of in the steel billet.
According to the present invention, the steel billet of above-mentioned composition can be obtained by the conventional method of this area, for example with converter or
Molten steel of the electric furnace smelting containing mentioned component, through external refining, Fruit storage, continuous casting is bloom, then by the bloom
Heating and thermal insulation in heating furnace is sent into, steel billet of the present invention can be obtained, specific process will not be repeated here.
According to the present invention, to the mode of the hot rolling, there is no particular limitation, can be the conventional hot rolling mode in this area,
Such as it can use pass method or omnipotent method that the hot rolling of steel billet is obtained into turnout rail, you can subsequent cooling procedure is carried out, it is right
The condition of the hot rolling is not particularly limited, and can be the normal condition of this area.
According to the present invention, after the hot rolling, using the hot rolling waste heat of turnout rail, by way of natural cooling, by track switch
The rail head skin temperature of rail is down to 800 DEG C, then carries out first stage acceleration cooling again.
In order to obtain the bainite turnout rail of function admirable, bainite structure is not only obtained, and also need to be use up
May refinement bainite structure (such as bainite ferrite lath of refinement), so just can ensure that obtain it is excellent comprehensive
The turnout rail of energy, this not only there are certain requirements to the composition of steel billet, and also need to strictly control accelerated cooling process.
According to the present invention, it is 10-20 DEG C/s that the first stage, which accelerates the cooling velocity of cooling, by controlling the cooling velocity can
Quickly through ferrite-pearlite transition region and it can suppress the precipitation of pro-eutectoid ferrite during continuous cooling.
Preferably, it is 12-15 DEG C/s that the first stage, which accelerates the cooling velocity of cooling, more preferably 14-15 DEG C/s.
According to the present invention, when rail head tread central temperature is down to 400-420 DEG C, while rail head to the turnout rail and
The flange of rail carries out second stage and accelerates cooling.Under preferable case, in step (3), when rail head tread central temperature is down to 415-419 DEG C
When, while the rail head to the turnout rail and flange of rail progress second stage acceleration cooling.Simultaneously to the rail head of the turnout rail and
The purpose that the flange of rail applies cooling medium is to avoid rail head from making deflection of rail because cooling is too fast, can not meet flatness requirements.
According to a kind of preferred embodiment of the present invention, the second stage accelerate the cooling velocity of cooling for 7-7.5 DEG C/
S, to obtain the more excellent rail of combination property.
According to the present invention, cooling and second stage is accelerated to accelerate the selection of the cooling medium of cooling not have to the first stage
There is special restriction, as long as the required effect of the present invention can be obtained, it is preferable that the first stage accelerates the cold of cooling
But medium is mist mixture, and it is compressed air that the second stage, which accelerates the cooling medium of cooling,.
According to the present invention, when rail head tread central temperature is down to 200-240 DEG C, at preferably 220-230 DEG C, stop the
Two-stage accelerates to cool down and be air-cooled to room temperature.
Present invention also offers the turnout rail prepared by the above method.The turnout rail have excellent tensile property, often
Warm impact property and rail head tread hardness, and wear weight loss amount is small；Meanwhile in turnout rail containing a small amount of (below 0.01wt%) or
It is low without expensive alloying elements Mo, Ni, V and Nb, cost.
The present invention will be described in detail by way of examples below.In following examples, " room temperature " refers to " 25 DEG C ".
The chemical composition that steel billet contains used by following examples is as shown in table 1, and steel billet contains used by comparative example
Some chemical compositions are as shown in table 2, wherein, in addition to the element in Tables 1 and 2, surplus be Fe and inevitably it is miscellaneous
Matter：
Table 1
Table 2
Embodiment 1-6
1# in table 1 to 6# steel billets is rolled into 60AT1 turnout rails under conditions of 1200 DEG C, according to the reference numeral of table 3
Shown accelerated cooling process respectively to the 1# in table 1 to 6# hot rolling of steel billet into 60AT1 turnout rails carry out acceleration cooling, then
Room temperature is air-cooled to, obtains turnout rail A1 to A6.
Table 3
Comparative example 1-6
1# in table 2 to 6# steel billets is rolled into 60AT1 turnout rails under conditions of 1200 DEG C, Direct Air-Cooled to room temperature,
Obtain turnout rail D1 to D6.
Test case 1
Performance inspection is carried out to turnout rail A1-A6 and D1-D6 prepared by embodiment 1-6 and comparative example 1-6 according to following methods
Survey, specifically：
By GB/T228.1-2010《Metal material tensile testing at ambient temperature》The tensile property of turnout rail is determined, is measured
Rm(tensile strength), A% (elongation), as a result as shown in table 4；
The impact property and hardness of turnout rail are determined by the method in current art, as a result as shown in table 4；
Wear test is carried out on MM200 type abrasion testers to determine the average weight loss of abrasion, sample is derived from turnout rail
The upper sample of A1-A6 and D1-D6 rail head, in all wear tests, lower grind away material all same, specific test parameters is such as
Under：
Specimen size：Thickness 10mm, diameter 36mm justify sample；Test load：150kg；Slippage：10%；To grinding lower sample material
Matter：Hardness is 280-310HB U75V hot rolled rails, and hardness is suitable with train wheel hardness；The speed of rotation：200 revs/min；
Total abrasion number：100000 times；
Wear weight loss amount is calculated as follows：The weight of sample after weight-abrasion of wear weight loss amount=sample before wearing.
As a result it is as shown in table 4.
Table 4
From above-described embodiment and the results contrast of comparative example, substep accelerates cooling skill after relying on rolling waste heat and rolling
Art, only containing the conventional inexpensive element such as appropriate C, Si, Mn, Cr in the turnout rail prepared although with the method for the invention,
But turnout rail is tough, and integrated performance index has met or exceeded the bainite track switch of the expensive alloying elements such as addition Ni, Mo
Rail.Therefore, on the premise of similar performance is obtained, expensive alloying elements content is greatly reduced in the present invention, is prepared so as to reduce
Cost, and product has excellent tough combination property, can be applied to heavy haul railway and line condition complicated highway section.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (6)
- A kind of 1. method for preparing turnout rail, it is characterised in that this method comprises the following steps：(1) hot rolling contains C：0.2-0.3wt%, Si：1.2-1.8wt%, Mn：1.8-2.5wt%, Cr：1.3-1.6wt% and Fe Steel billet and form turnout rail and carry out natural cooling, wherein, Mn and Cr total content are 3.2-3.7wt%；(2) when the rail head skin temperature of the turnout rail is down to 800 DEG C, respectively to the rail head tread center of turnout rail and rail head Both sides, which apply cooling medium, makes turnout rail carry out first stage acceleration cooling with 10-20 DEG C/s cooling velocity；(3) when rail head tread central temperature is down to 400-420 DEG C, while rail head and flange of rail application cooling medium to turnout rail Turnout rail is carried out second stage with 5-8 DEG C/s cooling velocity and accelerate cooling, during second stage accelerates cooling, institute The cooling velocity for stating the long leg siding track rostral face of turnout rail is higher than 1-2 DEG C of the cooling velocity/s in short-leg siding track rostral face；(4) when rail head tread central temperature is down to 200-240 DEG C, stop second stage and accelerate to cool down and be air-cooled to turnout rail Room temperature.
- 2. according to the method for claim 1, wherein, contain C in the steel billet：0.28-0.3wt%, Si：1.5- 1.6wt%, Mn：2.15-2.4wt%, Cr：1.4-1.5wt%, Mn and Cr total content are 3.6-3.7wt%.
- 3. method according to claim 1 or 2, wherein, the total content of the expensive alloying elements in the steel billet exists Below 0.01wt%, the expensive alloying elements include Mo, Ni, V and Nb.
- 4. according to the method for claim 3, wherein, expensive alloying elements are free of in the steel billet.
- 5. method according to claim 1 or 2, wherein, the first stage accelerates the cooling medium of cooling to be mixed for water smoke Compound, it is compressed air that second stage, which accelerates the cooling medium of cooling,.
- 6. the turnout rail prepared as the method described in any one in claim 1-5.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610543903.3A CN106048175B (en) | 2016-07-12 | 2016-07-12 | A kind of turnout rail and preparation method thereof |
| AU2017204403A AU2017204403B2 (en) | 2016-07-12 | 2017-06-28 | A turnout rail and preparation method thereof |
| DE102017115472.8A DE102017115472A1 (en) | 2016-07-12 | 2017-07-11 | Switch rail and its production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610543903.3A CN106048175B (en) | 2016-07-12 | 2016-07-12 | A kind of turnout rail and preparation method thereof |
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| CN106048175A CN106048175A (en) | 2016-10-26 |
| CN106048175B true CN106048175B (en) | 2018-03-06 |
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|---|---|
| CN (1) | CN106048175B (en) |
| AU (1) | AU2017204403B2 (en) |
| DE (1) | DE102017115472A1 (en) |
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| CN110358904B (en) * | 2019-05-30 | 2020-11-03 | 邯郸钢铁集团有限责任公司 | Method for controlling rail shape after on-line heat treatment of steel rail |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2297094B (en) * | 1995-01-20 | 1998-09-23 | British Steel Plc | Improvements in and relating to Carbide-Free Bainitic Steels |
| JP4644105B2 (en) * | 2005-11-28 | 2011-03-02 | 新日本製鐵株式会社 | Heat treatment method for bainite steel rail |
| CN103160736B (en) * | 2011-12-14 | 2015-09-02 | 鞍钢股份有限公司 | A kind of high strength bainite steel rail and thermal treatment process thereof |
| CN103993237B (en) * | 2014-05-22 | 2016-07-06 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of anti abrasive bainite turnout rail and production method thereof |
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2016
- 2016-07-12 CN CN201610543903.3A patent/CN106048175B/en active Active
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2017
- 2017-06-28 AU AU2017204403A patent/AU2017204403B2/en active Active
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| AU2017204403A1 (en) | 2018-02-01 |
| AU2017204403B2 (en) | 2018-07-19 |
| DE102017115472A1 (en) | 2018-01-18 |
| CN106048175A (en) | 2016-10-26 |
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