CN110216253A - Bloom Properties of Heavy Rail Steel disperse is segregated control method - Google Patents
Bloom Properties of Heavy Rail Steel disperse is segregated control method Download PDFInfo
- Publication number
- CN110216253A CN110216253A CN201910660560.2A CN201910660560A CN110216253A CN 110216253 A CN110216253 A CN 110216253A CN 201910660560 A CN201910660560 A CN 201910660560A CN 110216253 A CN110216253 A CN 110216253A
- Authority
- CN
- China
- Prior art keywords
- steel
- continuous casting
- heavy rail
- cold
- disperse
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
- B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Disclosed by the invention is a kind of bloom Properties of Heavy Rail Steel disperse segregation control method of field of steel metallurgy, focusing on the continuous casting stage is controlled using following steps: Stirring During Continuous Casting uses two cold electromagnetic agitations, wherein the two cold specific installation sites of electromagnetic agitation are apart from the section 5.0~6.0m of crystallizer molten steel surface, stir current frequency is 6.0~8.0Hz, and magnetic field strength is 250 × 10‑4~300 × 10‑ 4T；Middle packet casting superheat of liquid steel is by 30~40 DEG C of execution；Continuous casting two cold stage cooling water inflow presses 0.33~0.34L/kg of specific waterSteelIt executes.It is controlled according to above-mentioned parameter, realize large section Properties of Heavy Rail Steel slab center molten steel forming core cerium sulphate crystal, improve Local cooling solidification, promote local solidification time, so that casting blank solidification tissue, which forms to obtain, improves control, equiax crystal grain form changes, crystalline style is thin and fine and close and clear, and Models For Secondary Dendrite Arm spacing reduces, and rail solidified structure transition is gentle, solidified structure and homogeneity of ingredients improve significantly, and disperse segregation zones are substantially reduced.
Description
Technical field
The present invention relates to field of steel metallurgy more particularly to a kind of bloom Properties of Heavy Rail Steel disperse to be segregated control method.
Background technique
Rail is the main building block of railroad track, in railway transport course, provides locomotive and effectively supports and draw
It leads, is subjected to the huge lateral pressure from wheel.Based on China's infrastructure growth requirement, railway transportation is just with swift and violent speed
Degree development, and constantly tend to high speed, heavy loading.This undoubtedly proposes more harsh requirement to rail quality.Rail quality
Promotion be embodied in steel quality control level itself to a certain extent, such as high homogenieity, high-cleanness, Gao Chengfen precision.Its
The homogenieity (degree of segregation is smaller, and rail homogenieity is higher) of middle rail influences the uniformity of steel tissue, serious segregation meeting
The welding performance of rail base material and rail is influenced, and then influences rail and is on active service and uses.
In metallurgy industry, slab segregation is studied in detail in a large amount of experts and scholars, and research is pointed out: solidification of molten steel
In the process, the reallocation due to solute element in solid liquid phase forms the uneven of Chemical Composition in Cast Billet.Meanwhile research refers to
Out, during solidification of molten steel, the solid-phase component successively crystallized out from liquid is different, as a result makes an intra-die chemistry
Uneven components, this phenomenon are known as microsegregation.In addition, the differentiation distribution of research discovery slab segregation and solidified structure form
Significant corresponding relationship is presented in distribution；The study found that it is due to intensive equiax crystal crystal grain why equiax crystal, which improves center segregation,
Originally the normal segregation region for concentrating on the larger area at center is divided, after dividing under the conditions of identical detection scale
The more developed slab of equiax crystal is since crystal grain (negative segregation) accounting in test sample increases, therefore normal segregation value reduces.But with
Research go deep into, discovery when detection scale it is small to a certain extent, the intercrystalline normal segregation of equiax crystal is obvious, and equiax crystal area
Ratio is bigger, and disperse segregation distribution is wider, more serious.Thus, it is believed that improve equiaxial crystal ratio there is no fundamentally uniform steel,
But divide the normal segregation molten steel that script is concentrated, as a result the distribution of dispersion tinyization causes serious disperse to be segregated.It is right
In Properties of Heavy Rail Steel, rail head is main stress area, and the homogenieity control of rail head has important and complicated influence to rail military service performance,
Therefore control disperse segregation promotes rail quality significant.
Summary of the invention
The deficiencies of to overcome existing bloom Properties of Heavy Rail Steel disperse segregation serious, the technical problems to be solved by the present invention are:
A kind of control method that steel homogenieity level can be improved, reduces steel disperse degree of segregation is provided.
The technical solution adopted by the present invention to solve the technical problems is:
Bloom Properties of Heavy Rail Steel disperse is segregated control method, including successively carries out following technique, converter smelting, the refining of LF furnace,
RH vacuum, continuous casting, heating and rolling are controlled in the continuous casting stage using following steps:
A, Stirring During Continuous Casting: using two cold electromagnetic agitations, wherein the two cold specific installation sites of electromagnetic agitation are distance knot
The brilliant device molten steel face section 5.0~6.0m, the stir current frequency of two cold electromagnetic agitations is 6.0~8.0Hz, strong by adjusting electric current
Degree is to control stirring magnetic field strength as 250 × 10-4~300 × 10-4T；
B, middle packet casting superheat of liquid steel: Baogang's liquid is cast using high degree of superheat technique in continuous casting process, degree of superheat control
It is specific to be executed by 30~40 DEG C；
C, continuous casting two cold: for the intensity of secondary cooling used for Qiang Leng, specific cooling water inflow presses 0.33~0.34L/kg of specific waterSteelIt holds
Row, secondary cooling zone domain is covered to apart from crystallizer molten steel surface 15.0m；
D, solidification end is depressed: solidification end uses slighter compress mode, and overall reduction is executed by 8~10mm.
Further, the section of the bloom Properties of Heavy Rail Steel be 280mm × 380mm, be suitable for including at least U71Mn,
The Properties of Heavy Rail Steel of U78CrV and U75V kind produces.
Further, pulling speed of continuous casting is cooperated by 0.67~0.70m/min in continuous casting process, casting speed control fluctuates pole
Difference≤0.02m/min.
Further, being carried out when carrying out solidification end pressure using 6 groups of pressure rollers, the control of each group drafts exists
0mm, 1.5mm, 1.0~1.2mm, 2.0~3.0mm, 2mm, 1.5~2.0mm.
The beneficial effects of the present invention are: reducing the control requirement of disperse segregation for bloom Properties of Heavy Rail Steel, by rationally setting
It counts large section Properties of Heavy Rail Steel continuous casting and equips process system, cancel traditional M-EMS, using two cold electromagnetic agitations, and
The technical datas systems such as suitable mixing position and region are studied and defined, and accurately executes and is related in technical system of the invention
And every technical data, realize large section Properties of Heavy Rail Steel slab center molten steel forming core cerium sulphate crystal, it is cold to improve part
But it solidifies, promotes local solidification time, so that casting blank solidification tissue, which forms to obtain, improves control, column crystal is more flourishing, crystalline style
Thin and fine and close, equiax crystal grain form changes, and crystalline style is thin and fine and close and clear, and Models For Secondary Dendrite Arm spacing reduces, rail solidification group
It is gentle to knit transition, solidified structure and homogeneity of ingredients improve significantly, and disperse segregation zones are substantially reduced.
Specific embodiment
Below with reference to embodiment, the present invention is further described.
Bloom Properties of Heavy Rail Steel described herein refers to that section is the square billet of 280mm × 380mm, is applicable to generate
The heavy rail of U71Mn, U78CrV or U75V model.
Though Properties of Heavy Rail Steel conventional production process tends to be mature at present, with world-class enterprise there are obvious quality gap, with
Rail Service Environment condition is increasingly harsh and various complication, rail property require it is more harsh, with rail homogenieity and solidifying
Gu the relevant series of problems of tissue Precise control gradually exposes, the present invention reduces disperse segregation control for bloom Properties of Heavy Rail Steel
Needs, scientific and reasonable and effective technical system is provided, be related to critical equipment be equipped with and process matched therewith system,
The technical parameter system to match with quality control requirements is studied and defined on the basis of this.Bloom Properties of Heavy Rail Steel disperse of the invention is inclined
Control method is analysed, including successively carries out following technique, converter smelting, the refining of LF furnace, RH vacuum, continuous casting, heating and rolling, mainly
Improvement is controlled in the continuous casting stage using following steps in the continuous casting stage:
A, Stirring During Continuous Casting: using two cold electromagnetic agitations, wherein the two cold specific installation sites of electromagnetic agitation are distance knot
The brilliant device molten steel face section 5.0~6.0m, the stir current frequency of two cold electromagnetic agitations is 6.0~8.0Hz, strong by adjusting electric current
Degree is to control stirring magnetic field strength as 250 × 10-4~300 × 10-4T；
B, middle packet casting superheat of liquid steel: Baogang's liquid is cast using high degree of superheat technique in continuous casting process, degree of superheat control
It is specific to be executed by 30~40 DEG C；
C, continuous casting two cold: for the intensity of secondary cooling used for Qiang Leng, specific cooling water inflow presses 0.33~0.34L/kg of specific waterSteelIt holds
Row, secondary cooling zone domain is covered to apart from crystallizer molten steel surface 15.0m.
D, solidification end is depressed: solidification end uses slighter compress mode, and overall reduction is executed by 8~10mm.
The entire technical process of Rail Production has been comparative maturity, and the main distinction is the key in technical process
Equipment is equipped with, on critical process system and process parameter control.The application is mainly for M-EMS in traditional handicraft
Brought disperse segregation defects substitute M-EMS, and the cold electricity of structure adjusting two by using two cold electromagnetic agitations
Specific location, magnetic field strength, power frequency, the degree of superheat, Water Rate for Secondary Cooling Water and the solidification end pressure of magnetic stirring and secondary cooling zone domain
The parameters such as lower amount obtain according to a large number of experiments comparison, are controlled according to the parameter, can make bloom Properties of Heavy Rail Steel slab center
Solidified structure becomes thin and fine and close, and slab homogenieity significantly improves.
Other than above-mentioned core technology, to reach better continuous casting effect, it is also necessary to pulling speed of continuous casting and reduction distribution amount
Cooperation control, specifically, pulling speed of continuous casting is cooperated by 0.67~0.70m/min in continuous casting process, casting speed control fluctuates pole
Difference≤0.02m/min.When carrying out solidification end pressure, carried out using 6 groups of pressure rollers, the control of each group drafts 0mm,
1.5mm, 1.0~1.2mm, 2.0~3.0mm, 2mm, 1.5~2.0mm.
It is further illustrated below by three specific embodiments.
Embodiment 1
Certain domestic steel mill produces U71Mn series Properties of Heavy Rail Steel using the technology of the present invention, and rolling rail type is 60kg/m.The present invention is closed
Key technology point actual process executive condition are as follows: (1) Stirring During Continuous Casting: the two cold specific installation sites of electromagnetic agitation are distance crystallization
The device molten steel face section 5.0~6.0m.The stir current frequency of two cold electromagnetic agitations is 8.0Hz, by adjusting current strength to control
System stirring magnetic field strength is 250 × 10-4The cold electromagnetic agitation of the two of T.(2) packet casting superheat of liquid steel in: Baogang in continuous casting process
Liquid is cast using high degree of superheat technique, and degree of superheat control is specifically by 30~36 DEG C of execution.(3) continuous casting two cold: what the present invention used
Intensity of secondary cooling is Qiang Leng, and specific cooling water inflow presses specific water 0.33L/kgSteelIt executes, secondary cooling zone domain is covered to apart from crystallizer molten steel
Face 15.0m.(4) solidification end slighter compress, pressure originate in 2# withdrawal straightening machine, terminate at 6# withdrawal straightening machine, and each group depresses the practical pressure of roller
Lower amount is respectively as follows: 1.5mm, 1.0mm, 2.0~3.0mm, 2mm, 1.5mm, 8.0~9.0mm of overall reduction.
In addition, with the coordinated company of above-mentioned three core technologies (technical system and technological parameter group) of the present invention
Casting pulling rate is cooperated by 0.68~0.69m/min: very poor value≤0.02m/min is fluctuated in the control of continuous casting process Actual Casting Speed.
Solidified structure inspection is carried out to test slab, from slab leptoprosopy to slab center position, slab column crystal is ended in
Apart from 82~89mm of leptoprosopy, isometric crystalline region grain form change (under normal condition equiax crystal crystal grain in the form of short and thick,
Crystalline style is in cluster-shaped, and crystalline style is unintelligible), isometric crystalline region crystal grain is in tiny shape, and the crystalline style of crystal grain is clear, Models For Secondary Dendrite Arm spacing
Small, crystalline style tissue is thin and fine and close；Solidified structure corrosion check is carried out to rail, solidified structure crystalline style is clear, solidified structure transition
Gently (under normal condition, bloom Properties of Heavy Rail Steel casting blank solidification tissue subregion is obvious, mixed in chill --- column crystal ---
It is brilliant --- equiax crystal distribution).(it is larger to be derived from proportion of equiaxed grain without disperse segregation zones in rail head of rail region, extends after rolling
To rail head region).
Embodiment 2
Certain domestic steel mill produces U78CrV series Properties of Heavy Rail Steel using the technology of the present invention, and rolling rail type is 75kg/m.The present invention
Key technology point actual process executive condition are as follows: (1) Stirring During Continuous Casting: the two cold specific installation sites of electromagnetic agitation are distance knot
The brilliant device molten steel face section 5.0~6.0m.The stir current frequency of two cold electromagnetic agitations be 7.2Hz, by adjust current strength with
Control stirring magnetic field strength is 275 × 10-4The cold electromagnetic agitation of the two of T.(2) it packet casting superheat of liquid steel in: is wrapped in continuous casting process
Molten steel is cast using high degree of superheat technique, and degree of superheat control is specifically by 35~40 DEG C of execution.(3) continuous casting two cold: the present invention uses
Intensity of secondary cooling be Qiang Leng, specific cooling water inflow press specific water 0.34L/kgSteelIt executes, secondary cooling zone domain is covered to apart from crystallizer steel
Liquid level 15.0m.(4) solidification end slighter compress, pressure originate in 2# withdrawal straightening machine, terminate at 6# withdrawal straightening machine, it is practical that each group depresses roller
Drafts is respectively as follows: 1.5mm, 1.2mm, 2.0~3.0mm, 2mm, 1.8mm, 8.5~9.5mm of overall reduction.
In addition, with the coordinated company of above-mentioned three core technologies (technical system and technological parameter group) of the present invention
Casting pulling rate is cooperated by 0.67~0.68m/min: very poor value≤0.02m/min is fluctuated in the control of continuous casting process Actual Casting Speed.
Solidified structure inspection is carried out to test slab, from slab leptoprosopy to slab center position, slab column crystal is ended in
Apart from 84~89mm of leptoprosopy, isometric crystalline region grain form change (under normal condition equiax crystal crystal grain in the form of short and thick,
Crystalline style is in cluster-shaped, and crystalline style is unintelligible), isometric crystalline region crystal grain is in tiny shape, and the crystalline style of crystal grain is clear, Models For Secondary Dendrite Arm spacing
Small, crystalline style tissue is thin and fine and close；Solidified structure corrosion check is carried out to rail, solidified structure crystalline style is clear, solidified structure transition
Gently (under normal condition, bloom Properties of Heavy Rail Steel casting blank solidification tissue subregion is obvious, mixed in chill --- column crystal ---
It is brilliant --- equiax crystal distribution).(it is larger to be derived from proportion of equiaxed grain without disperse segregation zones in rail head of rail region, extends after rolling
To rail head region).
Embodiment 3
Certain domestic steel mill produces U75V series Properties of Heavy Rail Steel using the technology of the present invention, and rolling rail type is 60kg/m.The present invention is closed
Key technology point actual process executive condition are as follows: (1) Stirring During Continuous Casting: the two cold specific installation sites of electromagnetic agitation are distance crystallization
The device molten steel face section 5.0~6.0m.The stir current frequency of two cold electromagnetic agitations is 6.0Hz, by adjusting current strength to control
System stirring magnetic field strength is 300 × 10-4The cold electromagnetic agitation of the two of T.(2) packet casting superheat of liquid steel in: Baogang in continuous casting process
Liquid is cast using high degree of superheat technique, and degree of superheat control is specifically by 33~38 DEG C of execution.(3) continuous casting two cold: what the present invention used
Intensity of secondary cooling is Qiang Leng, and specific cooling water inflow presses specific water 0.333L/kgSteelIt executes, secondary cooling zone domain is covered to apart from crystallizer steel
Liquid level 15.0m.(4) solidification end slighter compress, pressure originate in 2# withdrawal straightening machine, terminate at 6# withdrawal straightening machine, it is practical that each group depresses roller
Drafts is respectively as follows: 1.5mm, 1.0mm, 2.5~3.5mm, 2.0mm, 2.0mm, 9.0~10.0mm of overall reduction.
In addition, with the coordinated company of above-mentioned three core technologies (technical system and technological parameter group) of the present invention
Casting pulling rate is cooperated by 0.68~0.70m/min: very poor value≤0.02m/min is fluctuated in the control of continuous casting process Actual Casting Speed.
Solidified structure inspection is carried out to test slab, from slab leptoprosopy to slab center position, slab column crystal is ended in
Apart from 83~86mm of leptoprosopy, isometric crystalline region grain form change (under normal condition equiax crystal crystal grain in the form of short and thick,
Crystalline style is in cluster-shaped, and crystalline style is unintelligible), isometric crystalline region crystal grain is in tiny shape, and the crystalline style of crystal grain is clear, Models For Secondary Dendrite Arm spacing
Small, crystalline style tissue is thin and fine and close；Solidified structure corrosion check is carried out to rail, solidified structure crystalline style is clear, solidified structure transition
Gently (under normal condition, bloom Properties of Heavy Rail Steel casting blank solidification tissue subregion is obvious, mixed in chill --- column crystal ---
It is brilliant --- equiax crystal distribution).(it is larger to be derived from proportion of equiaxed grain without disperse segregation zones in rail head of rail region, extends after rolling
To rail head region).
Above-described embodiment illustrates the Properties of Heavy Rail Steel using the technology of the present invention production, and casting blank solidification tissue forms to obtain improvement control
System, column crystal is more flourishing, and crystalline style is thin and fine and close, and equiax crystal grain form changes, and crystalline style is thin and fine and close and clear, secondary dendrite
Arm spacing reduces；Rail solidified structure transition is gentle, and solidified structure and homogeneity of ingredients improve significantly；Disperse segregation zones are significant
Reduce, rail head of rail is segregated without disperse.
Claims (4)
1. bloom Properties of Heavy Rail Steel disperse is segregated control method, including successively carries out following technique, converter smelting, the refining of LF furnace, RH
Vacuum, continuous casting, heating and rolling, characterized in that controlled in the continuous casting stage using following steps:
A, Stirring During Continuous Casting: using two cold electromagnetic agitations, wherein the two cold specific installation sites of electromagnetic agitation are apart from crystallizer
The molten steel face section 5.0~6.0m, the stir current frequencies of two cold electromagnetic agitations are 6.0~8.0Hz, by adjust current strength with
Control stirring magnetic field strength is 250 × 10-4~300 × 10-4T；
B, middle packet casting superheat of liquid steel: Baogang's liquid is cast using high degree of superheat technique in continuous casting process, and degree of superheat control is specific
It is executed by 30~40 DEG C；
C, continuous casting two cold: for the intensity of secondary cooling used for Qiang Leng, specific cooling water inflow presses 0.33~0.34L/kg of specific waterSteelIt executes,
Secondary cooling zone domain is covered to apart from crystallizer molten steel surface 15.0m；
D, solidification end is depressed: solidification end uses slighter compress mode, and overall reduction is executed by 8~10mm.
2. bloom Properties of Heavy Rail Steel disperse as described in claim 1 is segregated control method, it is characterized in that: the bloom Properties of Heavy Rail Steel
Section be 280mm × 380mm, suitable for include at least U71Mn, U78CrV and U75V kind Properties of Heavy Rail Steel produce.
3. bloom Properties of Heavy Rail Steel disperse as described in claim 1 is segregated control method, it is characterized in that: continuous casting is drawn in continuous casting process
Speed is cooperated by 0.67~0.70m/min, and casting speed control fluctuates very poor value≤0.02m/min.
4. bloom Properties of Heavy Rail Steel disperse as described in claim 1 is segregated control method, it is characterized in that: carrying out solidification end pressure
When lower, carried out using 6 groups of pressure rollers, the control of each group drafts 0mm, 1.5mm, 1.0~1.2mm, 2.0~3.0mm, 2mm,
1.5~2.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910660560.2A CN110216253A (en) | 2019-07-22 | 2019-07-22 | Bloom Properties of Heavy Rail Steel disperse is segregated control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910660560.2A CN110216253A (en) | 2019-07-22 | 2019-07-22 | Bloom Properties of Heavy Rail Steel disperse is segregated control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110216253A true CN110216253A (en) | 2019-09-10 |
Family
ID=67812593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910660560.2A Pending CN110216253A (en) | 2019-07-22 | 2019-07-22 | Bloom Properties of Heavy Rail Steel disperse is segregated control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110216253A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112355264A (en) * | 2020-10-23 | 2021-02-12 | 攀钢集团研究院有限公司 | Method for controlling center porosity of heavy rail steel bloom |
| CN113680982A (en) * | 2021-09-10 | 2021-11-23 | 北京科技大学 | Method for improving carbon segregation index of high-carbon steel with C content higher than 0.60% |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60238069A (en) * | 1984-05-11 | 1985-11-26 | Kawasaki Steel Corp | Continuous casting method of steel |
| CN104942252A (en) * | 2015-07-23 | 2015-09-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for improving internal quality of heavy-rail steel blooms |
| CN104959562A (en) * | 2015-07-23 | 2015-10-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Large billet heavy rail steel continuous casting method |
| CN105215309A (en) * | 2015-11-11 | 2016-01-06 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method that big cross section Properties of Heavy Rail Steel center segregation of casting blank controls |
| CN107737899A (en) * | 2017-10-27 | 2018-02-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Large section Properties of Heavy Rail Steel continuous casting producing method |
| CN108746526A (en) * | 2018-06-29 | 2018-11-06 | 攀钢集团攀枝花钢铁研究院有限公司 | The continuous cast method of bloom Properties of Heavy Rail Steel corner quality control |
-
2019
- 2019-07-22 CN CN201910660560.2A patent/CN110216253A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60238069A (en) * | 1984-05-11 | 1985-11-26 | Kawasaki Steel Corp | Continuous casting method of steel |
| CN104942252A (en) * | 2015-07-23 | 2015-09-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for improving internal quality of heavy-rail steel blooms |
| CN104959562A (en) * | 2015-07-23 | 2015-10-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Large billet heavy rail steel continuous casting method |
| CN105215309A (en) * | 2015-11-11 | 2016-01-06 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method that big cross section Properties of Heavy Rail Steel center segregation of casting blank controls |
| CN107737899A (en) * | 2017-10-27 | 2018-02-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Large section Properties of Heavy Rail Steel continuous casting producing method |
| CN108746526A (en) * | 2018-06-29 | 2018-11-06 | 攀钢集团攀枝花钢铁研究院有限公司 | The continuous cast method of bloom Properties of Heavy Rail Steel corner quality control |
Non-Patent Citations (2)
| Title |
|---|
| 周琳: "《中国长材轧制技术与装备》", 30 June 2014, 冶金工业出版社 * |
| 孙立根: "《连铸设计原理》", 31 August 2017, 冶金工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112355264A (en) * | 2020-10-23 | 2021-02-12 | 攀钢集团研究院有限公司 | Method for controlling center porosity of heavy rail steel bloom |
| CN113680982A (en) * | 2021-09-10 | 2021-11-23 | 北京科技大学 | Method for improving carbon segregation index of high-carbon steel with C content higher than 0.60% |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110303124A (en) | Large section Properties of Heavy Rail Steel casting blank solidification tissue improves control method | |
| CN105215310A (en) | A kind of method that big cross section Properties of Heavy Rail Steel strand center porosity controls | |
| CN109940140A (en) | A method of improving hypo-peritectic steel center segregation of casting blank quality | |
| CN105215309A (en) | A kind of method that big cross section Properties of Heavy Rail Steel center segregation of casting blank controls | |
| CN101480709B (en) | Method for improving continuous casting plate blank central segregation based on growth morphology analysis of coagulating shell | |
| CN105364042A (en) | Method for controlling crystalline structure uniformity of large-section heavy rail steel cast blank | |
| WO2024037063A1 (en) | High-carbon steel wire rod and production method therefor | |
| CN103121092A (en) | Continuous casting bloom soft press technology based on tail end electromagnetic stirring | |
| CN110216253A (en) | Bloom Properties of Heavy Rail Steel disperse is segregated control method | |
| CN110303131A (en) | Large section Properties of Heavy Rail Steel disperse is segregated control method | |
| CN102527975B (en) | Method for improving segregation and shrinkage of center of square and round billet | |
| CN110303125A (en) | Bloom Properties of Heavy Rail Steel homogenieity cooperates with lifting control method with compactness | |
| CN111715858A (en) | Production method for realizing low-superheat-degree continuous casting | |
| CN113118400B (en) | Homogenized slab continuous casting production method under outfield cooperative control action | |
| CN113084110B (en) | Method for reducing carbon segregation of alloy steel | |
| CN101596590B (en) | Method for inhibiting large steel ingot from macrosegregation by mechanical stirring | |
| CN110508763A (en) | Large section Properties of Heavy Rail Steel microsegregation control method | |
| CN110280732A (en) | Large section Properties of Heavy Rail Steel homogenieity cooperates with lifting control method with compactness | |
| CN110216252A (en) | Bloom heavy rail rail head region homogenieity method for improving | |
| CN110303130A (en) | Properties of Heavy Rail Steel homogenieity lifting control method | |
| CN110280733A (en) | Large section heavy rail rail head region homogenieity lifting control method | |
| CN110216254A (en) | Properties of Heavy Rail Steel homogenieity improves control method | |
| CN110280731A (en) | Large section Properties of Heavy Rail Steel center solidified structure thinning method | |
| CN110216255A (en) | Bloom Properties of Heavy Rail Steel casting blank solidification tissue improves control method | |
| CN110216258A (en) | Bloom Properties of Heavy Rail Steel center solidified structure thinning method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190910 |