CN104975136A - Control method for inclusions in heavy rail steel - Google Patents
Control method for inclusions in heavy rail steel Download PDFInfo
- Publication number
- CN104975136A CN104975136A CN201510427458.XA CN201510427458A CN104975136A CN 104975136 A CN104975136 A CN 104975136A CN 201510427458 A CN201510427458 A CN 201510427458A CN 104975136 A CN104975136 A CN 104975136A
- Authority
- CN
- China
- Prior art keywords
- molten steel
- carbide
- add
- calcium
- refining
- Prior art date
- 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.)
- Granted
Links
Abstract
The invention discloses a control method for inclusions in heavy rail steel. The method includes the following steps of converter smelting, ladle furnace (LF) refining, Ruhrstahl Heraeus (RH) vacuum treatment and continuous casting. According to the refining method, active lime is adopted in a converter, and active lime, silicon carbide and quartz sand are used for slagging in the refining process, so that the S content of molten steel is controlled to be reduced to below 0.006%, and it is guaranteed that all grades of the inclusions in the steel are lower than or equal to 2.0. According to the control method for the inclusions in the heavy rail steel, relatively high basicity is adopted, desulphurization efficiency is high and stable, and the method can obviously reduce various inclusions in the molten steel.
Description
Technical field
The present invention relates to a kind of smelting iron and steel technical field, be specifically related to a kind of control method of inclusion in heavy rail thing.
Background technology
Rail is the main building block of railroad track, in railway transport course, provides and effectively supports and guide, need bear the huge lateral pressure from wheel to locomotive.Based on China's capital construction growth requirement, transportation by railroad just with the development of swift and violent speed, and is constantly tending towards high speed, heavy loading.This proposes more harsh requirement to rail quality undoubtedly.Rail, when contacting with wheel, subjects the load that locomotive winding is reciprocal and changeable, and its purity is for fatigue endurance important.
Because steel inclusion is to the successional inhibition of steel matrix, steel is separated with inclusion in rolling processing, thermal treatment and use procedure, causes gap to produce, negative influence is produced to the index such as steel mechanics performance, erosion resistance.Especially, for the production of rail, the grading that the series of influence factors such as its aximal deformation value rolling, complicated thermal treatment process, special stress condition and climatope are mingled with rail is unfavorable, more directly creates detrimentally affect to service life.And for the control of Mechanism of Formation of The Globular Inclusions in Properties of Heavy Rail Steel By, be the object that metallargist studies always.
The patent No. is a kind of method that patent discloses Properties of Heavy Rail Steel By refining desulfurization rapidly of CN102732667A, and the method makes Properties of Heavy Rail Steel By realize reducing MnS inclusion fast in LF stove, but this patent does not consider other inclusiones.The patent No. is a kind of method that patent discloses Properties of Heavy Rail Steel By refining desulfurization rapidly of CN104313245A, while the method makes Properties of Heavy Rail Steel By realize desulfurization rapidly in LF stove, reduce the rank of Properties of Heavy Rail Steel By category-A inclusion, but this patent desulfuration efficiency is lower, only to the effect of category-A inclusion.
Summary of the invention
[technical problem that will solve]
The object of the invention is the problem solving above-mentioned prior art, a kind of control method of inclusion in heavy rail thing is provided.In steel prepared by the method, sulphur content is satisfied is less than or equal to 0.006%, and the method is while control S content, also controls the inclusion of other kinds, is applicable to production high-quality rail steel.
[technical scheme]
In order to reach above-mentioned technique effect, the present invention takes following technical scheme:
The invention provides a kind of control method of inclusion in heavy rail thing.The method flow process is: converter smelting → LF stove refining → RH vacuum-treat → continuous casting.The present invention by adopting quickened lime in converter, adopt quickened lime in refining process, the method for refining of silicon carbide and quartz sand slag making, the mass content controlling S in molten steel is reduced to less than 0.006%, and ensures that the grading of steel inclusion is all less than or equal to 2.0 grades.
A control method for inclusion in heavy rail thing, it comprises the following steps:
A, converter smelting
First, the mass content adding S in converter is less than or equal to the molten iron of 0.02%, carries out converter smelting; After converter smelting terminates, in tapping process, add calsibar alloy carry out deoxidation; After tapping for some time, in ladle, add quickened lime; After tapping terminates, to ladle top of the slag uniform fold one deck carbide of calcium; Then carry out argon bottom-blowing 5min and more than, the flow control of described blowing argon gas is at 50 ~ 80NL/min;
The refining of B, LF stove
After the process of completing steps A, the molten steel in ladle is sent to LF stove and carries out refining; Argon bottom-blowing immediately after molten steel enters the station, the flow control of described blowing argon gas, at 150 ~ 200NL/min, when after argon bottom-blowing 2 ~ 3min, adds quickened lime successively, carbide of calcium, silicon carbide carries out refining in ladle; After refining 10min, the flow of adjustment blowing argon gas is 100 ~ 200NL/min, then adds carbide of calcium successively, silicon carbide continues refining; Again after refining 10min, adjustment blowing argon gas flow is 100 ~ 150NL/min, adds quartz sand and continues refining, and when molten steel temperature is 1570 ~ 1600 DEG C, the flow of adjustment blowing argon gas is 50 ~ 80NL/min, argon bottom-blowing 6 ~ 10min under this flow, and molten steel sets off;
C, RH vacuum-treat
After the molten steel of step B process enters the station, vacuum-treat is carried out to molten steel; In vacuum treated whole process, controlling lift gas flow is 1200 ~ 1500NL/min, and vacuum tightness is less than 300Pa; When after vacuum-treat 15 ~ 18min, keep vacuum tightness, then add alloy and carry out Alloying Treatment; After alloying, more than circular treatment 5min, treats uniform composition, vacuum breaker; Then adjusting blowing argon gas flow is carry out more than argon bottom-blowing 5min under the condition of 50 ~ 80NL/min, and molten steel sets off;
D, continuous casting
Continuous casting is carried out to the molten steel of step C process.
The present invention is technical scheme further, and in step, the add-on of described quickened lime is that molten steel per ton adds 3 ~ 5kg quickened lime; The add-on of described carbide of calcium is that molten steel per ton adds 0.2 ~ 0.4kg carbide of calcium.
The present invention is technical scheme further, and in step, described tapping for some time refers to that when tapping be 90 ton hours.
The present invention is technical scheme further, is that, in steps A and step B, described carbide of calcium is Ca
2the carbide of calcium that C mass content is greater than 98%.
The present invention is technical scheme further, and in stepb, the add-on of described quickened lime is that molten steel per ton adds 2 ~ 3kg quickened lime; The first time add-on of described carbide of calcium is that molten steel per ton adds 0.2 ~ 0.4kg carbide of calcium, second time add-on is that molten steel per ton adds 0.2 ~ 0.4kg carbide of calcium; The first time add-on of described silicon carbide is that molten steel per ton adds 0.2 ~ 0.4kg silicon carbide, second time add-on is that molten steel per ton adds 0.2 ~ 0.4kg silicon carbide; The add-on of described quartz sand is that molten steel per ton adds 0.5 ~ 1kg quartz sand.
The present invention will be explained below.
A control method for inclusion in heavy rail thing, it comprises the following steps:
A, converter smelting
First, the mass content adding S in converter is less than or equal to the molten iron of 0.02%, carries out converter smelting; After converter smelting terminates, in tapping process, add calsibar alloy carry out deoxidation; After tapping for some time, in ladle, add quickened lime; After tapping terminates, to ladle top of the slag uniform fold one deck carbide of calcium; Then carry out argon bottom-blowing 5min and more than, the flow control of described blowing argon gas is at 50 ~ 80NL/min;
The present invention is less than or equal to the molten iron of 0.02% in step by the mass content of S, be to improve rail steel molten steel cleanness, the rank of stability contorting rail inclusion.
The present invention adopts the deoxidation of existing calsibar alloy reductor, and it is a kind of al-free deoxidation technique, can control the inclusion in Properties of Heavy Rail Steel By further.And in step, tapping process need ensure that the flow of argon bottom-blowing controls equally at 50 ~ 80NL/min.The use of quickened lime is the slag former as steel-making, has shortening the heat, improves the features such as molten steel purity and recovery rate.
The refining of B, LF stove
After the process of completing steps A, the molten steel in ladle is sent to LF stove and carries out refining; Argon bottom-blowing immediately after molten steel enters the station, the flow control of described blowing argon gas, at 150 ~ 200NL/min, when after argon bottom-blowing 2 ~ 3min, adds quickened lime successively, carbide of calcium, silicon carbide carries out refining in ladle; After refining 10min, the flow of adjustment blowing argon gas is 100 ~ 200NL/min, then adds carbide of calcium successively, silicon carbide continues refining; Again after refining 10min, adjustment blowing argon gas flow is 100 ~ 150NL/min, adds quartz sand and continues refining, and when molten steel temperature is 1570 ~ 1600 DEG C, the flow of adjustment blowing argon gas is 50 ~ 80NL/min, argon bottom-blowing 6 ~ 10min under this flow, and molten steel sets off;
Step B of the present invention adds silicon carbide in batches can remove inclusion in molten steel as much as possible, increases the purity being prepared into Properties of Heavy Rail Steel By.
C, RH vacuum-treat
After the molten steel of step B process enters the station, vacuum-treat is carried out to molten steel; In vacuum treated whole process, controlling lift gas flow is 1200 ~ 1500NL/min, and vacuum tightness is less than 300Pa; When after vacuum-treat 15 ~ 18min, keep vacuum tightness, then add alloy and carry out Alloying Treatment; After alloying, more than circular treatment 5min, treats uniform composition, vacuum breaker; Then adjusting blowing argon gas flow is carry out more than argon bottom-blowing 5min under the condition of 50 ~ 80NL/min, and molten steel sets off;
D, continuous casting
Continuous casting is carried out to the molten steel of step C process.
The present invention is technical scheme further, and in step, the add-on of described quickened lime is that molten steel per ton adds 3 ~ 5kg quickened lime; The add-on of described carbide of calcium is that molten steel per ton adds 0.2 ~ 0.4kg carbide of calcium.
The object that the present invention adds quickened lime and carbide of calcium is in step that to control molten steel basicity be 3 ~ 4.
The present invention is technical scheme further, and in step, described tapping for some time refers to that when tapping be 90 ton hours.
The present invention is technical scheme further, is that, in steps A and step B, described carbide of calcium is Ca
2the carbide of calcium that C mass content is greater than 98%.Requirement for the purity of carbide of calcium is to better control inclusion.
The present invention is technical scheme further, and in stepb, the add-on of described quickened lime is that molten steel per ton adds 2 ~ 3kg quickened lime; The first time add-on of described carbide of calcium is that molten steel per ton adds 0.2 ~ 0.4kg carbide of calcium, second time add-on is that molten steel per ton adds 0.2 ~ 0.4kg carbide of calcium; The first time add-on of described silicon carbide is that molten steel per ton adds 0.2 ~ 0.4kg silicon carbide, second time add-on is that molten steel per ton adds 0.2 ~ 0.4kg silicon carbide; The add-on of described quartz sand is that molten steel per ton adds 0.5 ~ 1kg quartz sand.
Be 1.5 ~ 2 to control basicity to adding materials in batches in the refining process of step B.
By detecting the rail adopting method provided by the invention to obtain, adopt the rail sulphur content of this explained hereafter to be less than or equal to 0.006%, the every grading of inclusion is all less than or equal to 2.0 grades, and T [O] is all less than or equal to 15 × 10
-6.
[beneficial effect]
The present invention compared with prior art, has following beneficial effect:
The present invention adopts relatively high basicity, and desulfuration efficiency is high and stable, and all serves obvious improvement result for each type impurity of molten steel.
Adopt the method for the invention molten steel S content can be reduced to and be less than or equal to 0.006% and ensure that the grading of steel inclusion is all less than or equal to 2.0 grades.And method of the present invention is applicable to production high-quality rail steel.
Embodiment
Below in conjunction with embodiments of the invention, the invention will be further elaborated.
Embodiment 1:
A, converter smelting
The molten iron entering converter is S content is 0.016%, after converter smelting terminates, start tapping, tapping process adds calsibar alloy and carries out deoxidation in ladle, add-on is that molten steel per ton adds 2.5kg Si-Ca-Ba, adds steel grade other alloys required after Si-Ca-Ba has added immediately.When tapping is 90 ton hours, in ladle, add quickened lime is that molten steel per ton adds 5kg.After tapping terminates, evenly adding carbide of calcium to the ladle top of the slag is that molten steel per ton adds 0.2kg.In above-mentioned tapping process, ladle bottom blowing argon flow amount adopts 60NL/min.After tapping terminates, adopt the BOTTOM ARGON BLOWING flow Argon 6min of 50NL/min, then molten steel is sent to LF refining.
The refining of B, LF stove
Connect BOTTOM ARGON BLOWING after molten steel to LF station and carry out steel ladle bottom argon blowing, argon blowing rate adopts 150NL/min, after Argon 2min, in ladle, add that quickened lime molten steel per ton adds 2.0kg, carbide of calcium molten steel per ton adds 0.2kg, silicon carbide molten steel per ton adds 0.2kg successively, slag charge adds rear continuation heating refining; After refining 10min, ladle bottom blowing argon flow amount is adjusted to 150NL/min, in ladle, then adds carbide of calcium molten steel per ton add 0.4kg, add silicon carbide molten steel per ton again and add 0.2kg, after slag charge adds, proceed refining; Again after refining 10min, ladle bottom blowing argon flow amount is adjusted to 100NL/min, in ladle, add quartz sand molten steel per ton add 1.0kg, then continue to add heat refining, after refining 8min, molten steel temperature reaches 1575 DEG C.Now, ladle bottom blowing argon flow amount is adjusted to 80NL/min, sampling analysis now molten steel S content is 0.006%, and molten steel LF sets off and is sent to RH and carries out vacuum-treat.
C, RH vacuum-treat
After molten steel to RH vacuum station, setting RH tubular stinger lift gas flow is 1500NL/min, start to vacuumize, 3min final vacuum degree reaches 100Pa and is stabilized in this value and carries out vacuum-treat, when being 18min when treated, keep vacuum tightness, add carburelant 50kg, ferromanganese 100kg, after alloy adds, circular treatment 7min, make uniform composition, vacuum breaker.Then blowing argon gas 6min;
D, continuous casting
Molten steel is sent to continuous casting working procedure, is produced into 280 × 380mm bloom continuous casting base product, and continuously cast bloom product, by rolling technology, is produced into the rail steel of 60kg/m.
By detecting this rail adopting method provided by the invention to obtain, adopt sulphur content in the rail of this explained hereafter to be 0.006%, inclusion is every is rated category-A 1.5 grades, and category-B, C class, D class are 0.5 grade, T [O] average out to 11.7 × 10
-6.
Embodiment 2
A, converter smelting
The molten iron entering converter is S content is 0.020%, after converter smelting terminates, start tapping, tapping process adds calsibar alloy and carries out deoxidation in ladle, add-on is molten steel 3.5kg Si-Ca-Ba per ton, adds steel grade other alloys required after Si-Ca-Ba has added immediately.When tapping is 90 ton hours, in ladle, add quickened lime molten steel 5kg per ton.After tapping terminates, evenly add carbide of calcium molten steel 0.4kg per ton to the ladle top of the slag.In above-mentioned tapping process, ladle bottom blowing argon flow amount adopts 60NL/min.After tapping terminates, adopt the BOTTOM ARGON BLOWING flow Argon 6min of 50NL/min, then molten steel is sent to LF refining.
The refining of B, LF stove
Connect BOTTOM ARGON BLOWING after molten steel to LF station and carry out steel ladle bottom argon blowing, argon blowing rate adopts 150NL/min, after Argon 2min, add quickened lime molten steel per ton 3.0kg, carbide of calcium molten steel per ton 0.4kg, silicon carbide molten steel 0.4kg per ton successively in ladle, slag charge adds rear continuation heating refining; After refining 10min, ladle bottom blowing argon flow amount is adjusted to 150NL/min, in ladle, then adds carbide of calcium molten steel per ton 0.2kg, add silicon carbide molten steel 0.2kg per ton, after slag charge adds, proceed refining; Again after refining 10min, ladle bottom blowing argon flow amount is adjusted to 100NL/min, in ladle, add quartz sand molten steel 1.0kg per ton, then continue to add heat refining, after refining 8min, molten steel temperature reaches 1580 DEG C.Now, ladle bottom blowing argon flow amount is adjusted to 80NL/min, sampling analysis now molten steel S content is 0.005%, and molten steel LF sets off and is sent to RH and carries out vacuum-treat.
C, RH vacuum-treat
After molten steel to RH vacuum station, setting RH tubular stinger lift gas flow is 1500NL/min, start to vacuumize, 3min final vacuum degree reaches 100Pa and is stabilized in this value and carries out vacuum-treat, when being 17min when treated, keep vacuum tightness, add carburelant 70kg, ferromanganese 120kg, after alloy adds, circular treatment 7min, make uniform composition, vacuum breaker.Then blowing argon gas 6min;
D, continuous casting
Molten steel is sent to continuous casting working procedure, is produced into 280 × 380mm bloom continuous casting base product, and continuously cast bloom product, by rolling technology, is produced into the rail steel of 60kg/m.
By detecting this rail adopting method provided by the invention to obtain, adopt sulphur content in the rail of this explained hereafter to be 0.005%, inclusion is every is rated category-A 1.0 grades, and category-B, C class, D class are 0.5 grade, T [O] average out to 10.2 × 10
-6.
Embodiment 3
A, converter smelting
The molten iron entering converter is S content is 0.010%, after converter smelting terminates, and start tapping, tapping process adds calsibar alloy and carries out deoxidation in ladle, and add-on is molten steel 3.0kg per ton, adds steel grade other alloys required after Si-Ca-Ba has added immediately.When tapping is 90 ton hours, in ladle, add quickened lime molten steel 3kg per ton.After tapping terminates, evenly add carbide of calcium molten steel 0.3kg per ton to the ladle top of the slag.In above-mentioned tapping process, ladle bottom blowing argon flow amount adopts 60NL/min.After tapping terminates, adopt the BOTTOM ARGON BLOWING flow Argon 6min of 50NL/min, then molten steel is sent to LF refining.
The refining of B, LF stove
Connect BOTTOM ARGON BLOWING after molten steel to LF station and carry out steel ladle bottom argon blowing, argon blowing rate adopts 150NL/min, after Argon 2min, add quickened lime molten steel per ton 3.0kg, carbide of calcium molten steel per ton 0.3kg successively, add silicon carbide molten steel 0.3kg per ton in ladle, slag charge adds rear continuation heating refining; After refining 10min, ladle bottom blowing argon flow amount is adjusted to 150NL/min, in ladle, then adds carbide of calcium molten steel per ton 0.3kg, silicon carbide molten steel 0.3kg per ton, after slag charge adds, proceed refining; Again after refining 10min, ladle bottom blowing argon flow amount is adjusted to 100NL/min, in ladle, add quartz sand molten steel 0.5kg per ton, then continue to add heat refining, after refining 8min, molten steel temperature reaches 1577 DEG C.Now, ladle bottom blowing argon flow amount is adjusted to 80NL/min, sampling analysis now molten steel S content is 0.005%, and molten steel LF sets off and is sent to RH and carries out vacuum-treat.
C, RH vacuum-treat
After molten steel to RH vacuum station, setting RH tubular stinger lift gas flow is 1500NL/min, start to vacuumize, 3min final vacuum degree reaches 100Pa and is stabilized in this value and carries out vacuum-treat, when being 18min when treated, keep vacuum tightness, add carburelant 30kg, ferromanganese 80kg, after alloy adds, circular treatment 8min, make uniform composition, vacuum breaker.Then blowing argon gas 6min;
D, continuous casting
Molten steel is sent to continuous casting working procedure, is produced into 280 × 380mm bloom continuous casting base product, and continuously cast bloom product, by rolling technology, is produced into the rail steel of 60kg/m.
By detecting this rail adopting method provided by the invention to obtain, adopt sulphur content in the rail of this explained hereafter to be 0.005%, inclusion is every is rated category-A 1.5 grades, and category-B, C class, D class are 0.5 grade, T [O] average out to 10.3 × 10
-6.
Although with reference to explanatory embodiment of the present invention, invention has been described here, above-described embodiment is only the present invention's preferably embodiment, embodiments of the present invention are not restricted to the described embodiments, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.
Claims (5)
1. a control method for inclusion in heavy rail thing, is characterized in that it comprises the following steps:
A, converter smelting
First, the mass content adding S in converter is less than or equal to the molten iron of 0.02%, carries out converter smelting; After converter smelting terminates, in tapping process, add calsibar alloy carry out deoxidation; After tapping for some time, in ladle, add quickened lime; After tapping terminates, to ladle top of the slag uniform fold one deck carbide of calcium; Then carry out argon bottom-blowing 5min and more than, the flow control of described blowing argon gas is at 50 ~ 80NL/min;
The refining of B, LF stove
After the process of completing steps A, the molten steel in ladle is sent to LF stove and carries out refining; Argon bottom-blowing immediately after molten steel enters the station, the flow control of described blowing argon gas, at 150 ~ 200NL/min, when after argon bottom-blowing 2 ~ 3min, adds quickened lime successively, carbide of calcium, silicon carbide carries out refining in ladle; After refining 10min, the flow of adjustment blowing argon gas is 100 ~ 200NL/min, then adds carbide of calcium successively, silicon carbide continues refining; Again after refining 10min, adjustment blowing argon gas flow is 100 ~ 150NL/min, adds quartz sand and continues refining, and when molten steel temperature is 1570 ~ 1600 DEG C, the flow of adjustment blowing argon gas is 50 ~ 80NL/min, argon bottom-blowing 6 ~ 10min under this flow, and molten steel sets off;
C, RH vacuum-treat
After the molten steel of step B process enters the station, vacuum-treat is carried out to molten steel; In vacuum treated whole process, controlling lift gas flow is 1200 ~ 1500NL/min, and vacuum tightness is less than 300Pa; When after vacuum-treat 15 ~ 18min, keep vacuum tightness, then add alloy and carry out Alloying Treatment; After alloying, more than circular treatment 5min, treats uniform composition, vacuum breaker; Then adjusting blowing argon gas flow is carry out more than argon bottom-blowing 5min under the condition of 50 ~ 80NL/min, and molten steel sets off;
D, continuous casting
Continuous casting is carried out to the molten steel of step C process.
2. the control method of inclusion in heavy rail thing according to claim 1, is characterized in that in step, and the add-on of described quickened lime is that molten steel per ton adds 3 ~ 5kg quickened lime; The add-on of described carbide of calcium is that molten steel per ton adds 0.2 ~ 0.4kg carbide of calcium.
3. the control method of inclusion in heavy rail thing according to claim 1, is characterized in that in step, and described tapping for some time refers to that when tapping be 90 ton hours.
4. the control method of inclusion in heavy rail thing according to claim 1, is characterized in that, in steps A and step B, described carbide of calcium is Ca
2the carbide of calcium that C mass content is greater than 98%.
5. the control method of inclusion in heavy rail thing according to claim 1, is characterized in that in stepb, and the add-on of described quickened lime is that molten steel per ton adds 2 ~ 3kg quickened lime; The first time add-on of described carbide of calcium is that molten steel per ton adds 0.2 ~ 0.4kg carbide of calcium, second time add-on is that molten steel per ton adds 0.2 ~ 0.4kg carbide of calcium; The first time add-on of described silicon carbide is that molten steel per ton adds 0.2 ~ 0.4kg silicon carbide, second time add-on is that molten steel per ton adds 0.2 ~ 0.4kg silicon carbide; The add-on of described quartz sand is that molten steel per ton adds 0.5 ~ 1kg quartz sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510427458.XA CN104975136B (en) | 2015-07-20 | 2015-07-20 | A kind of control method of inclusion in heavy rail thing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510427458.XA CN104975136B (en) | 2015-07-20 | 2015-07-20 | A kind of control method of inclusion in heavy rail thing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104975136A true CN104975136A (en) | 2015-10-14 |
| CN104975136B CN104975136B (en) | 2017-01-04 |
Family
ID=54272098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510427458.XA Active CN104975136B (en) | 2015-07-20 | 2015-07-20 | A kind of control method of inclusion in heavy rail thing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104975136B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108796172A (en) * | 2018-07-26 | 2018-11-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Improve the smelting process of heavy rail steel cleanness |
| CN108796173A (en) * | 2018-07-26 | 2018-11-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Improve the smelting process of heavy rail steel cleanness |
| CN108950119A (en) * | 2018-07-26 | 2018-12-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Improve the smelting process of heavy rail steel cleanness |
| CN113999951A (en) * | 2021-11-11 | 2022-02-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Magnesium-containing cored wire for steel rail production, steel rail and production method thereof |
| CN114058932A (en) * | 2021-11-19 | 2022-02-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Heavy rail steel and method for controlling silicate inclusions in production of heavy rail steel |
| CN115418443A (en) * | 2022-08-08 | 2022-12-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for controlling cleanliness of high manganese steel |
| CN115491457A (en) * | 2022-10-17 | 2022-12-20 | 山东钢铁股份有限公司 | Converter slagging process applied to production of deformed steel bars |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242241A (en) * | 2011-06-02 | 2011-11-16 | 内蒙古包钢钢联股份有限公司 | Method for controlling excessive impurity in heavy rail steel with operation speed of 350 kilometer/hour and over |
| CN102864275A (en) * | 2012-09-25 | 2013-01-09 | 鞍钢股份有限公司 | Control method of aluminum content of heavy rail steel |
-
2015
- 2015-07-20 CN CN201510427458.XA patent/CN104975136B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242241A (en) * | 2011-06-02 | 2011-11-16 | 内蒙古包钢钢联股份有限公司 | Method for controlling excessive impurity in heavy rail steel with operation speed of 350 kilometer/hour and over |
| CN102864275A (en) * | 2012-09-25 | 2013-01-09 | 鞍钢股份有限公司 | Control method of aluminum content of heavy rail steel |
Non-Patent Citations (3)
| Title |
|---|
| 卿家胜等: "重轨钢转炉炼钢工艺的研究", 《四川冶金》 * |
| 王玉昌等: "高速重轨钢洁净度与均质性控制关键技术", 《中国冶金》 * |
| 臧绍双等: "鞍钢高速重轨钢纯净化工艺实践", 《鞍钢技术》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108796172A (en) * | 2018-07-26 | 2018-11-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Improve the smelting process of heavy rail steel cleanness |
| CN108796173A (en) * | 2018-07-26 | 2018-11-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Improve the smelting process of heavy rail steel cleanness |
| CN108950119A (en) * | 2018-07-26 | 2018-12-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Improve the smelting process of heavy rail steel cleanness |
| CN113999951A (en) * | 2021-11-11 | 2022-02-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Magnesium-containing cored wire for steel rail production, steel rail and production method thereof |
| CN114058932A (en) * | 2021-11-19 | 2022-02-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Heavy rail steel and method for controlling silicate inclusions in production of heavy rail steel |
| CN114058932B (en) * | 2021-11-19 | 2023-02-21 | 攀钢集团攀枝花钢铁研究院有限公司 | Heavy rail steel and method for controlling silicate inclusions in production of heavy rail steel |
| CN115418443A (en) * | 2022-08-08 | 2022-12-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for controlling cleanliness of high manganese steel |
| CN115491457A (en) * | 2022-10-17 | 2022-12-20 | 山东钢铁股份有限公司 | Converter slagging process applied to production of deformed steel bars |
| CN115491457B (en) * | 2022-10-17 | 2024-04-02 | 山东钢铁股份有限公司 | Converter slagging process applied to deformed steel bar production |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104975136B (en) | 2017-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104975130A (en) | Method for controlling purity of heavy rail steel | |
| CN104975136A (en) | Control method for inclusions in heavy rail steel | |
| CN106521293B (en) | Rare earth metal is added in a kind of steel and puies forward high performance method | |
| CN105839015B (en) | A kind of production method of Mn-Cr series high-performances pinion steel | |
| WO2020093710A1 (en) | High-purity acid-resistant pipeline steel smelting process | |
| CN101550475B (en) | Method for producing ultra-low-carbon steel | |
| CN111172351B (en) | Control method for medium-carbon sulfur-containing aluminum deoxidized non-quenched and tempered steel Ds inclusion | |
| CN108330245A (en) | A kind of high-purity smelting process of stainless steel | |
| CN111910045B (en) | Smelting method of high-purity austenitic stainless steel | |
| CN102071287A (en) | Method for melting high-temperature-resistance and high-pressure-resistance alloy steel | |
| CN114318154B (en) | High-cleanliness welding wire steel L-S3 and preparation method thereof | |
| CN105177427A (en) | Steel for 30CrMo gas cylinders and production method thereof | |
| CN103468866B (en) | Refining technology for molten medium-high carbon steel | |
| CN114574770B (en) | Preparation method of high-strength fatigue-resistant 60Si2MnA spring steel | |
| CN105063269B (en) | The Slag modification method of rail steel | |
| CN105002324B (en) | A kind of method for controlling Properties of Heavy Rail Steel point-like inclusion | |
| CN104946844B (en) | The method of refining of rail steel | |
| CN108866276A (en) | Improve the smelting process of heavy rail steel cleanness | |
| CN104946852B (en) | Efficient desulfuration method for heavy rail steel | |
| CN113388710A (en) | Smelting control method of ultrahigh-strength cord steel | |
| CN108796173A (en) | Improve the smelting process of heavy rail steel cleanness | |
| CN108251598B (en) | Carbon increasing and nitrogen controlling production method of medium-carbon high-alloy steel | |
| CN111349797A (en) | Method for extracting vanadium from ultra-low silicon vanadium-titanium molten iron by converter | |
| CN108486454B (en) | Smelting method of ultra-low phosphorus steel | |
| CN103205522A (en) | Method for smelting plain carbon steel from semi-steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |