CN107779729A - A kind of method that the titanium alloy production anti-corrosion rail of high speed is sprayed in casting process - Google Patents
A kind of method that the titanium alloy production anti-corrosion rail of high speed is sprayed in casting process Download PDFInfo
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- CN107779729A CN107779729A CN201711054234.4A CN201711054234A CN107779729A CN 107779729 A CN107779729 A CN 107779729A CN 201711054234 A CN201711054234 A CN 201711054234A CN 107779729 A CN107779729 A CN 107779729A
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- Prior art keywords
- rail
- titanium alloy
- steel
- corrosion
- steel billet
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/085—Rail sections
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0025—Adding carbon material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
-
- 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
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
It is disclosed by the invention be Rail Production technical field a kind of casting process in spray titanium alloy production the anti-corrosion rail of high speed method, comprise the following steps：Stove molten iron and high alkalinity refining slag are entered using low S to rail steel first, carburant uses anthracite, uses foaming agent in LF heating processes, prevent molten steel and air contact；Cast is whole to carry out molding casting, and the strand after cast enters burial pit slow cooling；Then strand steel billet temperature after to be cast between 800 1200 DEG C when, titanium alloy is sprayed to steel billet tunneling boring using plasma cladding mode；Finally there is the steel billet of titanium alloy to be rolled again using roll mill after carrying out heating stove heat to cladding, obtain the rail for high-speed railway with anti-corrosion function.The beneficial effects of the invention are as follows：Titanium alloy is sprayed to steel billet tunneling boring using plasma cladding mode before the rolling, avoids billet surface and decarburization caused by air contact in heating process, while good corrosion protection effect can be played.
Description
Technical field
The present invention relates to being sprayed in Rail Production technical field, more particularly to a kind of casting process, titanium alloy production high speed is resistance to
Lose the method for rail.
Background technology
With the development of domestic and international high ferro, high ferro construction and high ferro line upkeep in rail and surface quality propose
Higher requirement.In tunnel or coastal environments, rail corrosion has turned into one and more prominent asked rail for high-speed railway
Topic, also as under rail defects and failures the main reason for road.Due to safety and economy that rail uses, excessive anti-corrosion can not be added
Alloying element, can only carry out the production supply of material with carbon or microalloy rail, and effective anti-corrosion can not be carried out using rail matrix.
At present, domestic and international Rail Production producer mainly carries out anti-corrosion, but rail corrosion resisting property or ring with Rail Surface spraying interleaving agent
Guarantor's problem is undesirable.
Rail for high-speed railway need to carry out pre- grinding process during use is laid to rail tread, both reconditioning steel
Track surface, thinning surface decarburized layer is also wanted, to reduce rail corrugation phenomenon.The too deep decarburized layer in rail top layer, what is brought is to beat
The difficulty and cost of mill.To reduce steel rail grinding depth, railway parent company once required that rail dispatched from the factory decarburized layer deepness≤0.3mm,
But domestic Rail Production producer lumber recovery is relatively low, finally still checked and accepted with dispatch from the factory decarburized layer deepness≤0.5mm of rail.Therefore, reduce
Decarburized layer turns into another rail for high-speed railway problem.
Due to high ferro train axle heavy and light, the speed of service is very fast, therefore rail for high-speed railway requirement is with intensity decreases
U71Mn rolleds are supplied, and rail strength is that existing steel grade is minimum, but requires that toughness plasticity is higher.
The content of the invention
To overcome existing rail for high-speed railway above shortcomings in terms of anti-corrosion and anti-decarburization, the present invention to be solved
Technical problem certainly is：One kind is provided titanium alloy material is sprayed with steel billet, and composite rolling is carried out to rail steel billet, to improve steel
The method that rail top layer is anti-corrosion and reduces decarburized layer deepness.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of method that the titanium alloy production anti-corrosion rail of high speed is sprayed in casting process, comprises the following steps：
A, make steel, stove molten iron and high alkalinity refining slag are entered using low S to rail steel, carburant uses anthracite, LF heating
During use foaming agent, prevent molten steel and air contact；
B, pour into a mould, pour into a mould whole progress molding casting, the strand after cast enters burial pit slow cooling；
C, plasma cladding, it is to be cast after strand steel billet temperature between 800-1200 DEG C when, using plasma cladding side
Formula sprays titanium alloy to steel billet tunneling boring；
D, roll, there is the steel billet of titanium alloy to be rolled again using roll mill after carrying out heating stove heat to cladding, obtain
Rail for high-speed railway with anti-corrosion function.
It is further that the content for ensureing S in steelmaking process is less than 0.015%.
It is further to take anticreep carbon coating to be coated billet surface before the rolling, protects steel billet top layer cladding
Layer.
The beneficial effects of the invention are as follows：The degree of purity of molten steel is improved in steel-making and cast link first, is avoided simultaneously
With air contact, the spilling of carbon is reduced, titanium alloy is secondly sprayed to steel billet tunneling boring using plasma cladding mode before the rolling,
On the one hand billet surface and decarburization caused by air contact in heating process are avoided, on the other hand can play good corrosion protection
Effect, the rail decarburized layer deepness finally given substantially reduce, and corrosion resisting property improves, suitable for domestic and international high ferro circuit.
Embodiment
With reference to embodiment, the present invention is further described.
A kind of method that the titanium alloy production anti-corrosion rail of high speed is sprayed in casting process, comprises the following steps：
A, make steel, stove molten iron and high alkalinity refining slag are entered using low S to rail steel, carburant uses anthracite, LF heating
During use foaming agent, prevent molten steel and air contact；
B, pour into a mould, pour into a mould whole progress molding casting, the strand after cast enters burial pit slow cooling；
C, plasma cladding, it is to be cast after strand steel billet temperature between 800-1200 DEG C when, using plasma cladding side
Formula sprays titanium alloy to steel billet tunneling boring；
D, roll, there is the steel billet of titanium alloy to be rolled again using roll mill after carrying out heating stove heat to cladding, obtain
Rail for high-speed railway with anti-corrosion function.
Traditional rail decarburized layer is thicker, mainly due in cast and the operation of rolling, the carbon of Rail Surface with it is empty
Oxygen in gas reacts, and to generate the gases such as carbon dioxide excessive.The present invention is improved from many aspects, is reduced first
S in molten steel, and high alkalinity refining slag is used, the ductility and toughness of steel can be effectively improved, it is easy to subsequently roll, in LF
Foaming agent is used in heating process, makes molten steel and air insulated, avoids the harmful element in air from entering molten steel, is also prevented from molten steel
In element it is excessive；Then molding casting is used in cast link, also for preventing from reacting with air contact, protection is poured
The concrete mode of note can use vacuum or gas-shield pouring；Finally, the most key is to use plasma cladding mode pair
Steel billet tunneling boring sprays titanium alloy, in order to reach optimal cladding effect, it should wait the temperature of steel billet between 800-1200 DEG C when
Carry out, the titanium alloy layer of spraying effectively can isolate steel billet with outside air, reduce steel billet during heating rolling
Carbon it is excessive, also just reduce the thickness of decarburized layer, while the titanium alloy layer property of cladding is relatively stable, has resistance to well
Effect is lost, improves the performance of rail.
Contrasted according to test of many times, with reference to requirement of the rail for high-speed railway to intensity, when the S contents in molten steel are less than
When 0.015%, rail can reach required ductility and toughness.
Further, before the rolling anticreep carbon coating can be taken to be coated billet surface, protects steel billet top layer cladding
Layer.On the one hand the anticreep carbon coating of coating can play certain inhibitory action to the appearance of decarburized layer, on the other hand to titanium alloy
Cladding layer plays a protective role, and avoids the cladding layer in the operation of rolling from coming off.
The rail top layer manufactured using this method is rich in anti-corrosion element and rich carbon, improves rail top layer corrosion resisting property and drop
The low decarburized layer deepness on rail top layer.Rail steel carbon content is 0.3-0.7%, tensile strength 500-900MPa, elongation percentage >=
10%, decarburized layer deepness≤0.3mm, excellent anti-corrosion performance.
The invention will be further described with comparative example by the following examples.
Embodiment one：
The embodiment of the present invention and corresponding comparative example select following rail chemical composition.
The embodiment of table 1 and comparative example rail chemical composition/%
Comparative example in the present invention uses and embodiment identical chemical composition, heating, rolling and burning optimization on line technique.
Plasma cladding processing is carried out to steel billet using the method for the present invention, wherein 1# to 5# is different coating layer thickness,
6# is comparative example, does not carry out plasma treatment.Then, 6 samples are using identical heating, rolling and the life of burning optimization on line technique
Production,
The embodiment of table 2 and comparative example steel billet cladding thickness
According to TB/T 2344-2012 requirements, rail head decarburized layer deepness inspection is carried out to 6 rail samples respectively, examines knot
Fruit is as shown in table 3.
The embodiment of table 3 and comparative example rail decarburized layer deepness
Period soaking corrosion is carried out in embodiment and comparative example rail according to GB/T 19746 and the standards of TB/T 2375 respectively to add
Fast corrosion test, corrosive agent are 2% NaCl solution, and etching time 200h, result of the test is shown in Table 4.
The embodiment of the present invention of table 4 and the abrasion of comparative example rail head of rail
The rail that the present invention have chosen identical chemical composition simultaneously is contrasted, in embodiment, at used five kinds
Reason mode is the method in the present invention.The comparing result of table 1 to table 4 shows, by carrying out plasma cladding processing to steel billet,
Rail decarburized layer deepness substantially reduces, and corrosion resisting property improves.
In summary, the production method of corrosion-resistant rail for high-speed railway provides one kind and had for improving steel in the present invention
While rail corrosion resisting property, the effective ways of rail head of rail decarburized layer deepness are reduced, product is applied to domestic and international high ferro circuit.
Claims (3)
1. the method for the titanium alloy production anti-corrosion rail of high speed is sprayed in a kind of casting process, it is characterized in that, comprise the following steps：
A, make steel, stove molten iron and high alkalinity refining slag are entered using low S to rail steel, carburant uses anthracite, LF heating processes
It is middle to use foaming agent, prevent molten steel and air contact；
B, pour into a mould, pour into a mould whole progress molding casting, the strand after cast enters burial pit slow cooling；
C, plasma cladding, it is to be cast after strand steel billet temperature between 800-1200 DEG C when, using plasma cladding mode pair
Steel billet tunneling boring sprays titanium alloy；
D, roll, there is the steel billet of titanium alloy to be rolled again using roll mill after carrying out heating stove heat to cladding, had
The rail for high-speed railway of anti-corrosion function.
2. the method for the titanium alloy production anti-corrosion rail of high speed, its feature are sprayed in a kind of casting process as claimed in claim 1
It is：Ensure that S content is less than 0.015% in steelmaking process.
3. the method for the titanium alloy production anti-corrosion rail of high speed, its feature are sprayed in a kind of casting process as claimed in claim 1
It is：Anticreep carbon coating is taken to be coated billet surface before rolling, protection steel billet top layer cladding layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711054234.4A CN107779729A (en) | 2017-10-31 | 2017-10-31 | A kind of method that the titanium alloy production anti-corrosion rail of high speed is sprayed in casting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711054234.4A CN107779729A (en) | 2017-10-31 | 2017-10-31 | A kind of method that the titanium alloy production anti-corrosion rail of high speed is sprayed in casting process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107779729A true CN107779729A (en) | 2018-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711054234.4A Pending CN107779729A (en) | 2017-10-31 | 2017-10-31 | A kind of method that the titanium alloy production anti-corrosion rail of high speed is sprayed in casting process |
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| Country | Link |
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| CN (1) | CN107779729A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113260467A (en) * | 2018-11-27 | 2021-08-13 | 株式会社Posco | Apparatus and method for treating rolled material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480390A (en) * | 2015-01-07 | 2015-04-01 | 攀钢集团攀枝花钢铁研究院有限公司 | High-impact-toughness steel rail and production method thereof |
| CN104962717A (en) * | 2015-07-16 | 2015-10-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Cooler for steel rails |
| CN106544933A (en) * | 2016-10-19 | 2017-03-29 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method that post weld heat treatment is carried out to steel rail weld joint |
-
2017
- 2017-10-31 CN CN201711054234.4A patent/CN107779729A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480390A (en) * | 2015-01-07 | 2015-04-01 | 攀钢集团攀枝花钢铁研究院有限公司 | High-impact-toughness steel rail and production method thereof |
| CN104962717A (en) * | 2015-07-16 | 2015-10-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Cooler for steel rails |
| CN106544933A (en) * | 2016-10-19 | 2017-03-29 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method that post weld heat treatment is carried out to steel rail weld joint |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113260467A (en) * | 2018-11-27 | 2021-08-13 | 株式会社Posco | Apparatus and method for treating rolled material |
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Application publication date: 20180309 |
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