CN108705050A - The method that bloom continuous casting produces 34CrMo4 oxygen cylinder steel - Google Patents
The method that bloom continuous casting produces 34CrMo4 oxygen cylinder steel Download PDFInfo
- Publication number
- CN108705050A CN108705050A CN201810698477.XA CN201810698477A CN108705050A CN 108705050 A CN108705050 A CN 108705050A CN 201810698477 A CN201810698477 A CN 201810698477A CN 108705050 A CN108705050 A CN 108705050A
- Authority
- CN
- China
- Prior art keywords
- 34crmo4
- continuous casting
- steel
- oxygen cylinder
- bloom
- 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.)
- Withdrawn
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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/0406—Moulds with special profile
-
- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/055—Cooling the moulds
-
- 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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/122—Accessories for subsequent treating or working cast stock in situ 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
- B22D11/18—Controlling or regulating processes or operations for pouring
-
- 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
Abstract
The present invention relates to a kind of methods that bloom continuous casting produces 34CrMo4 oxygen cylinder steel, are suitable for 360mm × 450mm section bloom 34CrMo4 oxygen cylinder steel continuous casting billets, belong to bloom continuous casting production technical field.The present invention is on the basis of M-EMS, electromagnetic agitation equipment is additionally arranged between two cold-zones and solidification end, and the installation site and running parameter of the two are rationally designed, in conjunction with control cast superheat of liquid steel, poring rate, cooling parameter etc., the compactness and homogenieity of bloom 34CrMo4 oxygen cylinder steel continuous casting billets are improved, in addition, passing through the fillet parameter designing to tube type mold, optimize the cooling of strand corner, improves the control of strand corner defect.By the improvement to cooling water channel, to ensure uniformity of conducting heat so that crystallizer exit casting blank shell thickness is uniform.Present invention can ensure that bloom 34CrMo4 oxygen cylinder steel continuous casting billet comprehensive quality high levels control.
Description
Technical field
The present invention relates to a kind of methods that bloom continuous casting produces 34CrMo4 oxygen cylinder steel, are suitable for 360mm × 450mm
Section bloom 34CrMo4 oxygen cylinder steel strands, belong to bloom 34CrMo4 oxygen cylinder steel production technical fields.
Background technology
The steel for oil well pipes that 34CrMo tube blank steels use mainly for the production of oil-gas mining, transport, steel grade chemical constituent are pressed
Weight percent is：C：0.31%~0.36%, Si：0.20%~0.35%, Mn：0.65%~0.85%, P≤0.015%,
S≤0.010%, Cr:0.95%~1.15%, Mo：0.17%~0.24%, Cu≤0.15%, Ni≤0.20%, residual elements
It is required that：Nb≤0.010%, Ti≤0.010%, B≤0.005%, and V+Nb+Ti+B+Zr≤0.15%；As≤0.015%, Sn
≤ 0.010%, As+Sn+Pb+Sb+Bi≤0.045%, surplus Fe.Product is using stress and hydrogen sulfide gas when in use
Collective effect under, brittle failure often occurs suddenly when stress is far below itself yield strength and (it is rotten to be known as hydrogen sulfide stress
Erosion), raw the problems such as revealing is often resulted in, production and environmental protection are adversely affected.With the development of the social economy, oil gas transports
The development trends such as efficiency requirements higher, exploitation difficulty increase constantly propose slab quality harsher requirement.Especially as cast
Base solidified structure ratio and distribution --- equiaxial crystal ratio are much researched and analysed and are pointed out, round billet equiaxial crystal ratio to poling lumber recovery and
Final product quality has a major impact.Therefore, strand strand equiaxial crystal ratio is improved, Center Equiaxial Crystal area is expanded, optimizes casting blank solidification group
It knits uniformity and just shows particularly important.
For 34CrMo tube blank steels, the Gao Ge, molybdenum content itself in steel grades determine that strand column crystal is flourishing
Trend bigger；Furthermore since casting blank section is relatively large and is round billet, specific surface area smaller strand heat transfer efficiency is lower, coagulates
Gu cooling slow, the control of crystalline structure is more difficult.Strand column crystal is flourishing in continuous casting production process, and equiaxial crystal ratio is relatively low,
It often leads to column crystal interdendritic to be bonded, formation confined space, molten steel continuation cooled and solidified, volume contraction, and outside space
Portion's molten steel can not in time feeding and formed it is loose, segregation the defects of.Loose and center segregation is formed by subsequent rolling process
It cannot all effectively eliminate in the process, influence product quality.As metallurgical work sutdy, 34CrMo oxygen cylinder steel slab qualities carry
It is the emphasis studied to rise with control.
Such as：
CN102021488A discloses a kind of steel for nuclear-island seamless steel tube and its production method.The nuclear island seamless steel of the present invention
Tube steel, chemical composition comprises the following components in percentage by weight are：0 < C≤0.20%, 0.10%≤Si≤0.35%, 0.80%≤Mn
≤ 1.60%, 0 < P≤0.020%, 0 < S≤0.015%, 0 < Cr≤0.25%, 0 < Ni≤0.50%, 0 < Cu≤
0.18%, 0 < Mo≤0.10%, the 0 < < of V≤0.06%, 0.020%≤Al≤0.050%, 0 Sn≤0.030%, Fe is remaining
Amount.The steel for nuclear-island seamless steel tube of the invention meet carbon equivalent (Ceq=C+Mn/6+ (Cr+Mo+V)/5+ (Ni+Cu)/15)≤
0.48 condition controls the essential element carbon and manganese content of steel, and stabilized steel pipe die intends the tensile property after hidden lino removal,
Ensure tube body and simulation hidden lino removal sample tensile property while meeting technical standard requirement.Using residual elements nickel as
Alloying element is added, and improves steel for nuclear-island seamless steel tube low-temperature impact toughness, meets its 0 DEG C, -20 DEG C of impact flexibility requirements.
But the specific method that 34CrMo4 oxygen cylinder steel is produced for 360mm × 450mm section bloom continuous castings is not directed to.
CN101984093A discloses a kind of hot-rolled steel pipe continuous casting round billet hot charging method and system, and method includes step：Essence
Molten steel after refining is cast into continuous cast round billets；Continuous cast round billets are cut into multiple lengths on continuous cast round billets production line with flame gun, and
At hot continuous cast round billets；The hot continuous cast round billets of multiple lengths at least have there are two flow direction, and the hot continuous cast round billets of first part pass through first
Round billet rollgang enters preheating furnace preheating or heat preservation, is then sent to high temperature stove heat by the second round billet rollgang；The
The hot continuous cast round billets in two parts are directly sent to high temperature stove heat by the second round billet rollgang；The heat of high temperature stove heat will be sent to even
Casting round billet is cut into cut lengths by hot saw equipment hot saw；The continuous cast round billets that hot saw is cut into cut lengths are sent to heat centering, are worn
Hole, tube rolling；Subsequently enter next procedure.The invention makes full use of the heat of hot continuous cast round billets, saves a large amount of fuel；It reduces simultaneously
Required equipment and workshop reduce investment and the maintenance of equipment expense of founding the factory.But for 360mm × 450mm section bloom continuous castings
The specific method of production 34CrMo4 oxygen cylinder steel is not directed to.
CN103537642A discloses a kind of new method of control continuous cast round billets machine Casting speed, by the control of continuous casting billet pulling rate
Method processed is divided into two stages.First stage, continuous casting billet disengage before dummy bar head (more than about 10-30 minute), the pulling rate control of strand
System is by traditional method formulation-depending on the practical degree of superheat of Metal in Tundish.Second stage, after strand disengages dummy bar head,
The Actual Casting Speed of strand should be determined by strand in the casting billet surface actual temperature of straightening section, i.e., according to the table of strand at straightening section
Face real data adjusts strand Actual Casting Speed data so that strand is as early as possible detached from 723 DEG C -912 DEG C of theoretical brittleness temperature region
This dangerous temperature section is greatly decreased strand casting billet surface caused by the tissue inter-variable of itself and easy tos produce crackle
Probability, next takes into account molten steel temperature in tundish.It is split convenient for being effectively improved or solving substantially arc great circle billet continuous casting machine billet surface
Line easy tos produce phenomenon, under the premise of ensureing slab quality, greatly improves conticaster entirety production efficiency, further
Strand lumber recovery is improved, great circle surface quality of continuously cast slab is preferably improved.But 360mm × 450mm section blooms are connected
The specific method of casting production 34CrMo4 oxygen cylinder steel is not directed to.
Invention content
The technical problem to be solved by the present invention is to：A kind of side of bloom continuous casting production 34CrMo4 oxygen cylinder steel is provided
Method is suitable for 360mm × 450mm section blooms, can promote bloom 34CrMo4 oxygen cylinder steel continuous casting billets compactness, homogeneous
Property, it is ensured that bloom 34CrMo4 oxygen cylinder steel continuous casting billet comprehensive quality high levels control.
The technical solution adopted in the present invention is to solve above-mentioned technical problem：Bloom continuous casting produces 34CrMo4 oxygen
The method of bottle steel, using tube type mold, the process parameter control of the cooling water of crystallizer be water flow 3100L/min~
3250L/min, hydraulic pressure 0.75MPa~0.85MPa；
M-EMS is that the low level in crystallizer exit is installed, and M-EMS equipment cover height is
350mm, lower end are flushed with mouth under crystallizer；M-EMS true field gaussian intensity is measured, magnetic field is stirred with practical
Gaussian intensity is that 240 ± 15Gs is stirred electric current setting, stir current frequency 2.4Hz；
Electromagnetic agitation equipment is installed between two cold-zones and solidification end, it is solidification which, which equips installation site,
The region that linear ratio is 0.45~0.47；Actual measurement stirring magnetic field gaussian intensity, by true field gaussian intensity for 250 ± 25Gs into
Row stir current intensity is arranged, and stir current frequency is 7.0Hz；Water Rate for Secondary Cooling Water presses 0.311Lkg-1 Steel~0.333Lkg-1 SteelIt is configured；
For the 1st heat of middle packet casting, cast superheat of liquid steel control is at 35 DEG C~45 DEG C；For the of middle packet casting
2~N heats, cast superheat of liquid steel control is at 20 DEG C~35 DEG C；
Casting speed control can according to target pulling rate 0.50m/min constant speed be poured into a mould in 0.45m/min~0.55m/min.
It is further：The corner fillet size of tube type mold is R20mm.The cooling of strand corner can be optimized in this way, changed
Kind strand corner defect control.
It is further：The cooling water channel of tube type mold is two into two times, and there are two water inlet and two water outlets for tool.
It can guarantee heat transfer uniformity in this way；Ensure that crystallizer exit casting blank shell thickness is uniform, shell thickness size is preferably controlled in
17mm~20mm.DN250 regulating valves can be installed to fine-tune crystallizer cooling water, with more preferable in crystallizer water inlet when implementation
Ground ensures crystallizer exit casting blank shell thickness.
It is further：Electromagnetic agitation equipment installation site between two cold-zones and solidification end also can be by following parameter
Control：Mounted on apart from the sections crystallizer molten steel surface 10.0m~11.0m.
The beneficial effects of the invention are as follows：On the basis of M-EMS, increase between two cold-zones and solidification end
If electromagnetic agitation equipment, and the installation site and running parameter of the two rationally designed, pour into a mould steel in conjunction with control
The liquid degree of superheat, poring rate, cooling parameter etc. improve the compactness and homogeneous of bloom 34CrMo4 oxygen cylinder steel continuous casting billets
Property, in addition, by the fillet parameter designing to tube type mold, the cooling of optimization strand corner improves strand corner defect control
System.By the improvement to cooling water channel, to ensure uniformity of conducting heat so that crystallizer exit casting blank shell thickness is uniform.This
Invention can ensure that bloom 34CrMo4 oxygen cylinder steel continuous casting billet comprehensive quality high levels control.
Specific implementation mode
With reference to embodiment, the invention will be further described.
In embodiment, the electromagnetic agitation equipment installed between two cold-zones and solidification end, referred to as " between two cold and solidifications
End electromagnetic agitation " (S~F-EMS).
Embodiment 1
The embodiment is certain steel mill method using the present invention, the 34CrMo4 of continuous casting 360mm × 450mm sections
Oxygen cylinder steel bloom.The present invention specific implementation mode be：Using tube type mold, corner fillet size is R20mm；Design
Tube type mold water route is two into two times, ensures heat transfer uniformity；It is 3100L/min~3250L/ that crystallizer, which is equipped with cooling water inflow,
Min, hydraulic pressure 0.75MPa~0.85MPa fine-tune crystallizer cooling water using DN250 regulating valves；M-EMS is
The low level in crystallizer exit is installed, and M-EMS equips cover height 350mm, and lower end is flushed with mouth under crystallizer；
M-EMS true field 240 ± 15Gs of gaussian intensity, stir current are set as 400A~450A, stir current frequency
2.4Hz.Installation " between two cold and solidification end electromagnetic agitations " position (S~F-EMS) is that solidification linear ratio is 0.45~0.47
Region, specially apart from the sections crystallizer molten steel surface 10.0m~11.0m, stirring magnetic field gaussian intensity is 250 ± 25Gs, is stirred
It is 270A~320A to mix current strength, and stir current frequency is 7.0Hz；Water Rate for Secondary Cooling Water is 0.311Lkg-1 Steel~0.333L
kg-1 Steel。
In addition, control is at 25 DEG C~35 DEG C, the first heat of middle packet, degree of superheat control for cast superheat of liquid steel (middle packet casting)
At 35 DEG C~45 DEG C；By casting speed control in 0.45m/min~0.55m/min, target pull rate 0.50m/min constant speed duration of pouring ratios
Example is 92.7%.
Casting process Mold liquid level stabilizing, covering slag thickness distribution are uniform.Low power is carried out to continuous casting blooms
Detection；Corroded using cold sour dendrite, detection strand cross section shell thickness distribution situation, the results show that the technology was produced
34CrMo4 oxygen cylinders steel continuous casting blooms shell thickness is circumferentially distributed uniformly along section, and whole control is in 17mm~20mm；Strand
Corner quality is good, to continuous casting billet tunneling boring carry out in-situ metal Scanning Detction, strand tunneling boring homogeneity be 0.921~
0.930, center portion consistency is 0.910~0.937, and corresponding bite low power grading center segregation, center porosity are ≤0.5
Grade, non-stop layer shrinkage cavity.
Embodiment 2
The embodiment is certain steel mill method production 360mm × 450mm section 34CrMo4 oxygen cylinder steel using the present invention
Continuous casting blooms.The present invention specific implementation mode be：Using tube type mold, corner fillet size is R20mm；Design tubular type
Crystallizer water route is two into two times, ensures heat transfer uniformity；It is 3105L/min~3200L/min that crystallizer, which is equipped with cooling water inflow,
Hydraulic pressure 0.75MPa~0.81MPa fine-tunes crystallizer cooling water using DN250 regulating valves；M-EMS is crystallization
The low level in device exit is installed, and M-EMS equips cover height 350mm, and lower end is flushed with mouth under crystallizer；Crystallization
Device electromagnetic agitation true field 250 ± 5Gs of gaussian intensity, stir current are set as 410A~500A, stir current frequency
2.4Hz.Installation " between two cold and solidification end electromagnetic agitations " position (S~F-EMS) is that solidification linear ratio is 0.45~0.47
Region, specially apart from the sections crystallizer molten steel surface 10.0m~11.0m, stirring magnetic field gaussian intensity is 250 ± 15Gs, is stirred
It is 245A~275A to mix current strength, and stir current frequency is 7.0Hz；Water Rate for Secondary Cooling Water is 0.316Lkg-1 Steel~0.330L
kg-1 Steel。
In addition, control is at 25 DEG C~35 DEG C, the first heat of middle packet, degree of superheat control for cast superheat of liquid steel (middle packet casting)
At 35 DEG C~43 DEG C；By casting speed control in 0.47m/min~0.53m/min, target pull rate 0.50m/min constant speed duration of pouring ratios
Example is 95.4%.
Casting process Mold liquid level stabilizing, covering slag thickness distribution are uniform.Low power is carried out to continuous casting blooms
Detection；Corroded using cold sour dendrite, detection strand cross section shell thickness distribution situation, the results show that the technology was produced
34CrMo4 oxygen cylinders steel continuous casting blooms shell thickness is circumferentially distributed uniformly along section, and whole control is in 17mm~18.9mm；Casting
Base corner quality is good, to continuous casting billet tunneling boring carry out in-situ metal Scanning Detction, strand tunneling boring homogeneity be 0.914~
0.931, center portion consistency is 0.912~0.936, and corresponding bite low power grading center segregation, center porosity are ≤0.5
Grade, non-stop layer shrinkage cavity.
Embodiment 3
The embodiment is certain steel mill method production 360mm × 450mm section 34CrMo4 oxygen cylinder steel using the present invention
Continuous casting blooms.The present invention specific implementation mode be：Using tube type mold, corner fillet size is R20mm；Design tubular type
Crystallizer water route is two into two times, ensures heat transfer uniformity；It is 3200L/min~3250L/min that crystallizer, which is equipped with cooling water inflow,
Hydraulic pressure 0.87MPa~0.90MPa fine-tunes crystallizer cooling water using DN250 regulating valves；M-EMS is crystallization
The low level in device exit is installed, and M-EMS equips cover height 350mm, and lower end is flushed with mouth under crystallizer；Crystallization
Device electromagnetic agitation true field 240 ± 10Gs of gaussian intensity, stir current are set as 495A~520A, stir current frequency
2.4Hz.Installation " between two cold and solidification end electromagnetic agitations " position (S~F-EMS) is that solidification linear ratio is 0.45~0.47
Region, specially apart from the sections crystallizer molten steel surface 10.0m~11.0m, stirring magnetic field gaussian intensity is 240 ± 15Gs, is stirred
It is 200A~220A to mix current strength, and stir current frequency is 7.0Hz；Water Rate for Secondary Cooling Water is 0.315Lkg-1 Steel~0.329L
kg-1 Steel。
In addition, control is at 27 DEG C~35 DEG C, the first heat of middle packet, degree of superheat control for cast superheat of liquid steel (middle packet casting)
At 35 DEG C~45 DEG C；By casting speed control in 0.46m/min~0.55m/min, target pull rate 0.50m/min constant speed duration of pouring ratios
Example is 91.5%.
Casting process Mold liquid level stabilizing, covering slag thickness distribution are uniform.Low power is carried out to continuous casting blooms
Detection；Corroded using cold sour dendrite, detection strand cross section shell thickness distribution situation, the results show that the technology was produced
34CrMo4 oxygen cylinders steel continuous casting blooms shell thickness is circumferentially distributed uniformly along section, and whole control is in 17.8mm~20mm；Casting
Base corner quality is good, to continuous casting billet tunneling boring carry out in-situ metal Scanning Detction, strand tunneling boring homogeneity be 0.909~
0.931, center portion consistency is 0.920~0.933, and corresponding bite low power grading center segregation, center porosity are ≤0.5
Grade, non-stop layer shrinkage cavity.
Above-described embodiment illustrates, after technical scheme of the present invention, 360mm × 450mm section 34CrMo4 oxygen
Bottle steel bloom slab quality control is good, and strand corner zero-fault, shell thickness is uniformly distributed circumferentially, and strand tunneling boring is equal
Matter is preferable, and internal rarefaction and shrinkage cavity are effectively controlled, the high-caliber control of strand center portion consistency, center porosity, center
It is more excellent to be segregated the control of low multiple quality standard diagrams, other capability and performances are whole qualified.
Claims (5)
1. the method that bloom continuous casting produces 34CrMo4 oxygen cylinder steel, it is characterised in that：Using tube type mold, crystallizer
The process parameter control of cooling water is water flow 3100L/min~3250L/min, hydraulic pressure 0.75MPa~0.85MPa；
M-EMS is that the low level in crystallizer exit is installed, and it is 350mm that M-EMS, which equips cover height,
Lower end is flushed with mouth under crystallizer；M-EMS true field gaussian intensity is measured, it is strong with practical stirring magnetic field Gauss
Degree is that 240 ± 15Gs is stirred electric current setting, stir current frequency 2.4Hz；
Electromagnetic agitation equipment is installed between two cold-zones and solidification end, it is that solidification is linear which, which equips installation site,
Than the region for 0.45~0.47；Actual measurement stirring magnetic field gaussian intensity is that 250 ± 25Gs is stirred by true field gaussian intensity
Current strength setting is mixed, stir current frequency is 7.0Hz；Water Rate for Secondary Cooling Water presses 0.311Lkg-1 Steel~0.333Lkg-1 SteelInto
Row setting；
For the 1st heat of middle packet casting, cast superheat of liquid steel control is at 35 DEG C~45 DEG C；For 2~N of middle packet casting
Heat, cast superheat of liquid steel control is at 20 DEG C~35 DEG C；
Casting speed control is in 0.45m/min~0.55m/min.
2. the method for bloom continuous casting production 34CrMo4 oxygen cylinder steel as described in claim 1, it is characterised in that：Tubular type knot
The corner fillet size of brilliant device is R20mm.
3. the method for bloom continuous casting production 34CrMo4 oxygen cylinder steel as described in claim 1, it is characterised in that：Tubular type knot
The cooling water channel of brilliant device is two into two times, and there are two water inlet and two water outlets for tool.
4. the method for the bloom continuous casting production 34CrMo4 oxygen cylinder steel as described in any one of claims 1 to 3, special
Sign is：Shell thickness size Control is in 17mm~20mm.
5. the method for the bloom continuous casting production 34CrMo4 oxygen cylinder steel as described in any one of claims 1 to 3, special
Sign is：Between two cold-zones and solidification end electromagnetic agitation equipment installation site be apart from crystallizer molten steel surface 10.0m~
The sections 11.0m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810698477.XA CN108705050A (en) | 2018-06-29 | 2018-06-29 | The method that bloom continuous casting produces 34CrMo4 oxygen cylinder steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810698477.XA CN108705050A (en) | 2018-06-29 | 2018-06-29 | The method that bloom continuous casting produces 34CrMo4 oxygen cylinder steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108705050A true CN108705050A (en) | 2018-10-26 |
Family
ID=63872339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810698477.XA Withdrawn CN108705050A (en) | 2018-06-29 | 2018-06-29 | The method that bloom continuous casting produces 34CrMo4 oxygen cylinder steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108705050A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111534742A (en) * | 2020-04-30 | 2020-08-14 | 天津钢管制造有限公司 | Pipe blank for preventing internal cracks of steel pipe blank of gas cylinder, manufacturing method and application |
| CN113953477A (en) * | 2021-10-27 | 2022-01-21 | 张家港宏昌钢板有限公司 | Core high-density continuous casting thick plate blank and production method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803150A (en) * | 2016-03-23 | 2016-07-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for controlling blank casting quality of phi-280mm Cr-Mo series circular tube blank |
| CN105803149A (en) * | 2016-03-23 | 2016-07-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Equiaxial crystal ratio control method for 35CrMo round pipe billet with phi 280 mm |
| CN106475542A (en) * | 2016-11-16 | 2017-03-08 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of axle steel and its continuous cast method |
| CN107457379A (en) * | 2017-07-26 | 2017-12-12 | 山东钢铁股份有限公司 | A kind of production method of high-carbon high-alloy bearing steel large round billet |
| CN107790666A (en) * | 2017-10-27 | 2018-03-13 | 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 control method |
-
2018
- 2018-06-29 CN CN201810698477.XA patent/CN108705050A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803150A (en) * | 2016-03-23 | 2016-07-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for controlling blank casting quality of phi-280mm Cr-Mo series circular tube blank |
| CN105803149A (en) * | 2016-03-23 | 2016-07-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Equiaxial crystal ratio control method for 35CrMo round pipe billet with phi 280 mm |
| CN106475542A (en) * | 2016-11-16 | 2017-03-08 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of axle steel and its continuous cast method |
| CN107457379A (en) * | 2017-07-26 | 2017-12-12 | 山东钢铁股份有限公司 | A kind of production method of high-carbon high-alloy bearing steel large round billet |
| CN107790666A (en) * | 2017-10-27 | 2018-03-13 | 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 control method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111534742A (en) * | 2020-04-30 | 2020-08-14 | 天津钢管制造有限公司 | Pipe blank for preventing internal cracks of steel pipe blank of gas cylinder, manufacturing method and application |
| CN113953477A (en) * | 2021-10-27 | 2022-01-21 | 张家港宏昌钢板有限公司 | Core high-density continuous casting thick plate blank and production method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105803152B (en) | The center porosity control method of 30CrMo circular pipe blank steel strands | |
| CN105568122B (en) | φ 280mm 30CrMo circular pipe blank center segregation control methods | |
| CN102527956A (en) | Continuous-cast P91-steel round pipe billet and production process thereof | |
| CN111101065B (en) | High-strength corrosion-resistant high-temperature-resistant welding wire steel and production method thereof | |
| CN105458205B (en) | The production method of high nickel steel Gr.8 continuous cast round billets | |
| CN105586531B (en) | A kind of production method that can effectively control 37Mn circular pipe blank steel slab qualities | |
| CN114012055B (en) | Continuous casting process of rectangular bloom of high-homogeneity high-carbon chromium bearing steel | |
| CN105772666B (en) | The center segregation control method of 30CrMo circular pipe blank steel strands | |
| CN105803150B (en) | The chrome molybdenum series circular pipe blank slab quality control method of φ 280mm | |
| CN105803149B (en) | The 35CrMo circular pipe blank equiaxial crystal ratio control methods of φ 280mm | |
| CN105695659B (en) | The 37Mn circular pipe blank slab quality control method of φ 280mm | |
| CN111715858A (en) | Production method for realizing low-superheat-degree continuous casting | |
| CN108705050A (en) | The method that bloom continuous casting produces 34CrMo4 oxygen cylinder steel | |
| CN105624540A (en) | Control method of equiaxial crystal ratio of 30CrMo round pipe billet and steel casting blank | |
| CN106825463A (en) | A kind of method that billet caster produces low-carbon (LC) Ni Mo steel alloys | |
| CN111363972A (en) | Production method of weathering resistant steel Q355NHD | |
| CN109898020A (en) | A kind of titanium microalloying seamless line pipe and preparation method thereof | |
| CN109317628A (en) | YQ450NQR1 Yi shape steel bloom corner crack control method | |
| CN105772665B (en) | The 34CrMo pipes steel billet and its method for refining of 350 ㎜ diameters | |
| CN105568166B (en) | The 34CrMo pipes steel billet and its casting method of 350 ㎜ diameters | |
| CN108330379A (en) | The production method of petroleum natural gas pipeline steel L485 (X70) | |
| CN105779869A (en) | Internal quality control method of 30Mn tube bloom steel cast blanks | |
| CN105603301A (en) | 30CrMo circular tube billet steel casting blank internal quality control method | |
| CN105603302A (en) | Phi350mm 34CrMo circular tube steel blank and smelting method thereof | |
| CN105803151B (en) | The 35CrMo circular pipe blank center porosity control methods of φ 280mm |
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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181026 |
|
| WW01 | Invention patent application withdrawn after publication |