CN107739775A - The anti-corrosion Rail Production method of high speed of evanohm is sprayed in casting process - Google Patents
The anti-corrosion Rail Production method of high speed of evanohm is sprayed in casting process Download PDFInfo
- Publication number
- CN107739775A CN107739775A CN201711046278.2A CN201711046278A CN107739775A CN 107739775 A CN107739775 A CN 107739775A CN 201711046278 A CN201711046278 A CN 201711046278A CN 107739775 A CN107739775 A CN 107739775A
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- CN
- China
- Prior art keywords
- rail
- steel
- corrosion
- cladding
- evanohm
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
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- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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- 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)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Coating By Spraying Or Casting (AREA)
- Metal Rolling (AREA)
Abstract
It is disclosed by the invention be Rail Production technical field a kind of casting process in spray evanohm high speed it is anti-corrosion use Rail Production method, stove molten iron is entered using low S and high alkalinity refining slag is made steel, using anthracite as carburant, foaming agent is used in LF heating processes；The molten steel that steel-making obtains is poured into a mould, pours into a mould whole progress molding casting, the strand after cast enters burial pit slow cooling；Plasma cladding is carried out to the steel billet after continuous casting by the use of high-carbon chrome alloy as cladding powder, and heating steel billet after cladding is combined closely cladding alloy material and rail steel as matrix material using composite rolling method to after 1,100 1300 DEG C.The beneficial effects of the invention are as follows：It is normal segregation to make rail case carbon, decarburized layer deepness is shallower and top layer is rich in the excellent ferrochrome material of corrosion resisting property, so as to significantly improve the anti-corrosion anti-corrosion Rail Production method of high speed with spraying evanohm in the casting process for reducing decarburized layer deepness in rail top layer.
Description
Technical field
The present invention relates to the high speed that evanohm is sprayed in Rail Production technical field, more particularly to a kind of casting process is anti-corrosion
With Rail Production method.
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
The technical problems to be solved by the invention are：There is provided one kind can make rail case carbon be normal segregation, decarburization
Layer depth is shallower and top layer is rich in the excellent ferrochrome material of corrosion resisting property, anti-corrosion and reduce so as to significantly improve rail top layer
The anti-corrosion Rail Production method of high speed of evanohm is sprayed in the casting process of decarburized layer deepness.
The high speed of spraying evanohm is anti-corrosion in casting process used by its technical problem of present invention solution uses Rail Production
Method, stove molten iron is entered using low S and high alkalinity refining slag is made steel, using anthracite as carburant, in LF heating processes
Use foaming agent；The molten steel that steel-making obtains is poured into a mould, pours into a mould whole progress molding casting, the strand after cast enters slow cooling
Cheat slow cooling；Plasma cladding is carried out to the steel billet after continuous casting by the use of high-carbon chrome alloy as cladding powder, the steel billet after cladding adds
After hot to 1100-1300 DEG C, cladding alloy material and rail steel as matrix material are combined closely using composite rolling method.
It is further to take anticreep carbon coating to be coated billet surface before rolling.
It is further that the content that low S enters S in stove molten iron is less than 0.015%.
The beneficial effects of the invention are as follows：The application is used as carburant by anthracite, and foaming agent is used in LF heating processes
Improve molten steel and making steel and pouring into a mould the degree of purity of link, while avoid and air contact, reduce the spilling of carbon, secondly rolling
High-carbon chrome alloy is sprayed to steel billet using plasma cladding mode before system, on the one hand avoid in heating process billet surface with
Decarburization caused by air contact, on the other hand can play good corrosion protection effect, and the rail decarburized layer deepness finally given is bright
Aobvious to reduce, corrosion resisting property improves, strong applicability.
Embodiment
With reference to embodiment, the present invention is further described.
The anti-corrosion Rail Production method of high speed of evanohm is sprayed in casting process of the present invention, is entered using low S
Stove molten iron and high alkalinity refining slag are made steel, and using anthracite as carburant, foaming agent is used in LF heating processes；Will refining
The molten steel that steel obtains is poured into a mould, pour into a mould it is whole carry out molding casting, prevent and air contact, suck excessive N；After cast
Strand enters burial pit slow cooling；Strand steel billet temperature after cast between 800-1200 DEG C when, by the use of high-carbon chrome alloy as molten
Steel billet after whiting foot couple continuous casting carries out plasma cladding, and the heating steel billet after cladding is to after 1100 DEG C to 1300 DEG C, using multiple
Close milling method cladding alloy material and rail steel as matrix material are combined closely.
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 uses high alkalinity by reducing the S in molten steel
Refining slag, the ductility and toughness of steel can be effectively improved, be easy to subsequently roll, foaming agent is used in LF heating processes, is made
Molten steel and air insulated, the harmful element in air is avoided to enter molten steel, the element being also prevented from molten steel is excessive；In cast link
Using molding casting, also for preventing from reacting with air contact, the concrete mode of molding casting can use vacuum or
Gas-shield pouring；Plasma cladding is carried out to the steel billet after continuous casting by the use of high-carbon chrome alloy as cladding powder, in order to reach
Optimal cladding effect, it should wait the temperature of steel billet between 800-1200 DEG C when carry out, the high-carbon chrome alloy layer of spraying can
Effectively steel billet is isolated 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 good anti-corrosion effect, improves the property of rail
Energy.
Anticreep carbon coating is taken to be coated billet surface before rolling, protection steel billet top layer cladding layer.Deposited is anti-
On the one hand decarburization coating can play certain inhibitory action to the appearance of decarburized layer, on the other hand play guarantor to titanium alloy cladding layer
Shield acts on, and avoids the cladding layer in the operation of rolling from coming off.
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.
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)
- Rail Production method is used 1. the high speed that evanohm is sprayed in casting process is anti-corrosion, it is characterised in that：Stove molten iron is entered using low S Made steel with high alkalinity refining slag, using anthracite as carburant, foaming agent is used in LF heating processes；Steel-making is obtained Molten steel poured into a mould, pour into a mould it is whole carry out molding casting, the strand after cast enters burial pit slow cooling；Use high-carbon chrome alloy Plasma cladding is carried out to the steel billet after continuous casting as cladding powder, and heating steel billet after cladding uses to after 1100-1300 DEG C Composite rolling method combines closely cladding alloy material and rail steel as matrix material.
- Rail Production method is used 2. the high speed that evanohm is sprayed in casting process as claimed in claim 1 is anti-corrosion, it is characterized in that： Anticreep carbon coating is taken to be coated billet surface before rolling.
- Rail Production method is used 3. the high speed that evanohm is sprayed in casting process as claimed in claim 1 is anti-corrosion, it is characterized in that： The content that low S enters S in stove molten iron is less than 0.015%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711046278.2A CN107739775A (en) | 2017-10-31 | 2017-10-31 | The anti-corrosion Rail Production method of high speed of evanohm is sprayed in casting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711046278.2A CN107739775A (en) | 2017-10-31 | 2017-10-31 | The anti-corrosion Rail Production method of high speed of evanohm is sprayed in casting process |
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| Publication Number | Publication Date |
|---|---|
| CN107739775A true CN107739775A (en) | 2018-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711046278.2A Pending CN107739775A (en) | 2017-10-31 | 2017-10-31 | The anti-corrosion Rail Production method of high speed of evanohm is sprayed in casting process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110653350A (en) * | 2019-09-30 | 2020-01-07 | 鞍钢股份有限公司 | Manufacturing method of casting blank with high carbon content on surface layer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654768A (en) * | 2009-08-24 | 2010-02-24 | 刘均波 | alloy powder for plasma cladding |
| 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 |
-
2017
- 2017-10-31 CN CN201711046278.2A patent/CN107739775A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654768A (en) * | 2009-08-24 | 2010-02-24 | 刘均波 | alloy powder for plasma cladding |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110653350A (en) * | 2019-09-30 | 2020-01-07 | 鞍钢股份有限公司 | Manufacturing method of casting blank with high carbon content on surface layer |
| CN110653350B (en) * | 2019-09-30 | 2021-05-28 | 鞍钢股份有限公司 | Manufacturing method of casting blank with high carbon content on surface layer |
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Application publication date: 20180227 |