CN106498116A - A kind of production technology of circle chain of mine steel - Google Patents
A kind of production technology of circle chain of mine steel Download PDFInfo
- Publication number
- CN106498116A CN106498116A CN201610952185.5A CN201610952185A CN106498116A CN 106498116 A CN106498116 A CN 106498116A CN 201610952185 A CN201610952185 A CN 201610952185A CN 106498116 A CN106498116 A CN 106498116A
- Authority
- CN
- China
- Prior art keywords
- steel
- slag
- refining
- production technology
- rolling
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/06—Product speed
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of production technology of circle chain of mine steel, belongs to vertical bar round-bar pass technical field, including steps such as converter smelting, the refining of LF stoves, billet continuous casting, steel rolling.The technical program passes through above-mentioned processing step, it is achieved that standardized production, and converter slag-making dephosphorization, the refining of LF stoves white slag and the cast of continuous casting full guard make steel clean, good quality of product；Continuous cast mold electromagnetic agitation, alleviates the component segregation at strand center, shrinkage cavity, rarefaction defect, and strand avoids straightening cracks susceptibility temperature range when aligning, it is ensured that slab quality；Steel rolling wind sheltering heap cold a few hours after controlled rolling and controlled cooling, steels strapping, 20MnV, 25MnV round steel of function admirable is produced.
Description
Technical field
The invention belongs to vertical bar round-bar pass technical field, is related to a kind of production technology of hot rolling vertical bar pole, especially
It is related to a kind of production technology of circle chain of mine steel.
Background technology
20MnV, 25MnV pole is the raw material for manufacturing circle chain of mine, and circle chain of mine is mainly used in underground coal mine
The haulage chain of drag conveyor, coal plough, flitting and other machinery, the quality of its quality directly affect coal mine equipment
Service life.In production practices, usually require that chain has enough intensity, load-carrying ability, have certain toughness, prevent crisp
Disconnected, also require to have endurance, the performance such as wear-resistant, corrosion-resistant.Requirement to circle chain of mine steel is：Heat treatment can be quenched in water
Fire；The complete through hardening of the whole section of chain link；Good cold-bending property is suitable to cold chaining；Good weldability.But China is for high intensity
The research of circle chain of mine is started late, and intensity rank is low.
20MnV, 25MnV vertical bar pole of the φ 18mm and φ 20mm of water steel production is the original for manufacturing high-tensile round-link chain
Material, and high-tensile round-link chain is widely used in coal mine machinery.According to the state of development of current winning equipment industry, it is badly in need of obtaining
The ring chain steel of sufficient intensity, to meet the needs of safety in production.
Content of the invention
In order to solve the above problems, the invention provides a kind of production technology of ring chain steel, so as to obtain high intensity
The circle chain of mine steel of rank, the safety in production for mine equipment provide sound assurance.
The present invention is achieved by following technical solution.
A kind of production technology of circle chain of mine steel, comprises the steps：
(1) converter smelting
A. molten iron is blended into in converter, in the molten iron being blended into, composition includes：Si=0.20～0.80mass%, Mn=0.30
～0.80mass%, P≤0.140mass%, S≤0.040mass%；Molten iron temperature >=1250 DEG C；
In the main slag making materials lime added in converting process, composition includes：CaO ＞ 90mass%, SiO2≤
1.5mass%, S ＜ 0.15mass%；Activity of lime ＞ 310ml；
B. according to the content selection operation method of P in molten iron, if P ＜ 0.120mass% in hot metal composition, using single slag process
Operation；If P >=0.120mass% in hot metal composition, operated using double slag process；Finishing slag basicity is controlled 3.2～3.6；
C. re-blow oxygen using highcasting speed, it is to avoid repeatedly after-blow, it is ensured that molten steel not peroxidating, strive a catch carbon success,
Improve the carbon content in molten steel；
D. for ensureing tapping hole in order, using scum rod slag-stopping tapping；Guarantee during tapping C >=0.06mass%, P≤
0.015mass%；
E. ladle is required：Red packet is tapped, that is, empty ladle temperature >=900 DEG C before tapping, ladle bottom blowing brick are unimpeded, and ladle is clean
Only, there must not be bag edge, it is ensured that ladle nozzle is automatically opened up during continuous casting；
F. silicon is matched somebody with somebody using fero-manganesesilicon, not enough manganese ferromanganese polishing, vanadium iron match somebody with somebody vanadium；With SiAlCaBa or SiCaBa complex deoxidizations
Agent carries out final deoxidizing, and addition is 120kg/ stoves.
(2) LF stoves refining
A. white slag is made using calcium carbide, SiFe powder, the consumption for reducing Al as far as possible forms liquid white slag in power supply 8min, and
Kept for the white slag time be not less than 10min；
B. refining terminates, and feeding 30 meters/stove of calcium line carries out molten steel Calcium treatment, and after line feeding, soft argon blowing time is more than 8min, soft blow
During argon, the ladle top of the slag springs up not exposed molten steel slightly；
(3) continuous casting：In casting process, poured into a mould using full guard, it is to avoid steel contacts air, and using crystallizer electricity
Stir；Ensure package operation in the middle of full during continuous casting.
(4) steel rolling
A. furnace temp control before steel rolling：Bringing-up section 1100-1200 DEG C, 1080-1130 DEG C of soaking zone, start rolling temperature
980-1030 DEG C, 1000 DEG C of desired value.
B. roll control：Mill speed 8-15 meter per second, rolled piece enter finishing mill temperature 900-970 DEG C, do not wear water-cooled after rolling
But, overhead cold bed air cooling, temperature during the cold bed in overhead：880-930℃.
(5) bundling is stacked：Timely handling stacking after steels strapping, wind sheltering heap are cold, heap cool time >=8h.
Further, in described (1) converter smelting b step, if selecting double slag operation, during blowing 4-6 minutes, initial stage
Slag.
Further, in described (1) converter smelting Step d, if C ＜ 0.06mass% or after-blow number of times are big during tapping
In 2 times, then change the common steel grade of refining.
Further, in described (1) converter smelting f steps, if endpoint molten steel oxidisability is strong, increase SiAlCaBa or
The consumption of SiCaBa double deoxidizers is to 121～130kg/ stoves.
Further, described (2) LF stoves are refined in a steps, the SiFe Powder Particle Sizes≤3mm for being adopted.
Further, in step (3), Metal in Tundish liquid level be 600-700mm, tundish company pour process liquid
Face must not be less than 400mm；M-EMS Current 200A, frequency 4Hz；Casting speed 1.90m ± 0.02m/min, two is cold
Section specific water is 0.90-1.25L/kg (i.e. every kilogram steel 0.90-1.25 rises water)；Strand straightening temperature >=900 DEG C.
Further, in described (4) steel rolling a steps, should be uniform during heating steel billet, steel billet head, in, the tail temperature difference≤30 DEG C.
The invention has the beneficial effects as follows：
A kind of production technology of circle chain of mine steel of the present invention, by converter smelting, the refining of LF stoves, continuous casting, rolls
The operations such as steel, it is achieved that standardized production, converter slag-making dephosphorization, the refining of LF stoves white slag and the cast of continuous casting full guard make steel clean
Only, good quality of product.Continuous cast mold electromagnetic agitation, alleviates the component segregation at strand center, shrinkage cavity, rarefaction defect, casting
Base avoids straightening cracks susceptibility temperature range when aligning, it is ensured that slab quality.Steel rolling is kept away after controlled rolling and controlled cooling, steels strapping
Wind heap cold a few hours, 20MnV, 25MnV round steel of function admirable is produced.
Specific embodiment
Be described further below technical scheme, but claimed scope be not limited to described.
A kind of production technology of circle chain of mine steel of the present invention, comprises the steps：
(1) converter smelting
A. molten iron is blended into in converter, in the molten iron being blended into, composition includes：Si=0.20～0.80mass%, Mn=0.30
～0.80mass%, P≤0.140mass%, S≤0.040mass%；Molten iron temperature >=1250 DEG C；
In the main slag making materials lime added in converting process, composition includes：CaO ＞ 90mass%, SiO2≤
1.5mass%, S ＜ 0.15mass%；Activity of lime ＞ 310ml；
B. according to the content selection operation method of P in molten iron, if P ＜ 0.120mass% in hot metal composition, using single slag process
Operation；If P >=0.120mass% in hot metal composition, operated using double slag process；Finishing slag basicity is controlled 3.2～3.6；If choosing
Select double slag operation, then during blowing 4-6 minutes, the slag of falling initial stage.
C. re-blow oxygen using highcasting speed, it is to avoid repeatedly after-blow, it is ensured that molten steel not peroxidating, strive a catch carbon success,
Improve the carbon content in molten steel；
D. for ensureing tapping hole in order, using scum rod slag-stopping tapping；Guarantee during tapping C >=0.06mass%, P≤
0.015mass%；If C ＜ 0.06mass% or after-blow number of times are more than 2 times during tapping, change the common steel grade of refining.
E. ladle is required：Red packet is tapped, that is, empty ladle temperature >=900 DEG C before tapping, ladle bottom blowing brick are unimpeded, and ladle is clean
Only, there must not be bag edge, it is ensured that ladle nozzle is automatically opened up during continuous casting；
F. silicon is matched somebody with somebody using fero-manganesesilicon, not enough manganese ferromanganese polishing, vanadium iron match somebody with somebody vanadium；With SiAlCaBa or SiCaBa complex deoxidizations
Agent carries out final deoxidizing, and addition is 120kg/ stoves.If endpoint molten steel oxidisability is strong, suitably increase SiAlCaBa or SiCaBa multiple
The consumption of deoxidier is closed, 121～130kg/ stoves can be increased to.
(2) LF stoves refining
A. white slag is made using calcium carbide, SiFe powder, the consumption for reducing Al as far as possible forms liquid white slag in power supply 8min, and
Kept for the white slag time be not less than 10min；SiFe Powder Particle Sizes≤the 3mm for being adopted.
B. refining terminates, and feeding 30 meters/stove of calcium line carries out molten steel Calcium treatment, and after line feeding, soft argon blowing time is more than 8min, soft blow
During argon, the ladle top of the slag springs up not exposed molten steel slightly；
(3) continuous casting：In casting process, poured into a mould using full guard, it is to avoid steel contacts air, and using crystallizer electricity
Stir；Ensure package operation in the middle of full during continuous casting.Metal in Tundish liquid level be 600-700mm, tundish company pour process liquid
Face must not be less than 400mm；M-EMS Current 200A, frequency 4Hz, with mitigate the component segregation at strand center, shrinkage cavity,
Rarefaction defect；Casting speed 1.90m ± 0.02m/min, secondary cooling zone specific water are 0.90-1.25L/kg, i.e., every kilogram steel 0.90-
1.25 rise water；Strand straightening temperature >=900 DEG C, avoid straightening cracks susceptibility temperature range, after now strand is subject to aligning external force,
It is not easily susceptible to cracking.
(4) steel rolling
A. furnace temp control before steel rolling：Bringing-up section 1100-1200 DEG C, 1080-1130 DEG C of soaking zone, start rolling temperature
980-1030 DEG C, 1000 DEG C of desired value.Should be uniform during heating steel billet, steel billet head, in, the tail temperature difference≤30 DEG C.
B. roll control：Mill speed 8-15 meter per second, rolled piece enter finishing mill temperature 900-970 DEG C, do not wear water-cooled after rolling
But, overhead cold bed air cooling, temperature during the cold bed in overhead：880-930℃.
(5) bundling is stacked：Timely handling stacking after steels strapping, wind sheltering heap are cold, heap cool time >=8h.
Embodiment
Below by taking the production method of water steel 20MnV, 25MnV round steel as an example, technical scheme is further described.Under
The step of not being described in detail in embodiment is stated, is processed using conventional method.
According to GB/T 10560-2008《Tensile round link chain steels for mining》20MnV, 25MnV steel of national Specification
Chemical composition and mechanical property, formulated the internal control target call of chemical composition mechanical property.GB/T 10560-2008 standards
The chemical composition of 20MnV, 25MnV steel specified with internal control target is shown in Table 1, and mechanical property is shown in Table 2.
The size of 20MnV, 25MnV round steel, profile, weight and tolerance should meet GB/T 702-2008《Hot rolled circular steel
With square steel form factor weight and tolerance》Regulation.
The chemical composition of 20MnV, 25MnV steel that 1 GB/T 10560-2008 standards of table and internal control target specify
(mass%)
Note：In steel, residual elements Cu is not more than 0.25mass%, and Cr, Ni are respectively not more than 0.30mass%.
The mechanical property of 20MnV, 25MnV steel that 2 GB/T 702-2008 standards of table and internal control target specify
Note：Mechanical property need to be checked after being heat-treated by the regulation of standard GB/T10560-2008.
Production technology of the water steel colliery with ring chain steel 20MnV, 25MnV, its technological process is：Molten iron, steel scrap 100t
The heating rolling bar cooling of top and bottom combined blown converter smelting slag-stopping tapping deoxidation alloying LF refining continuous casting
Bundling.
Including following operating procedure：
1) converter smelting：Ingredient requirement：
Molten iron includes following component：Si=0.20～0.80mass%, Mn=0.30-0.80mass%, P≤
0.140mass%, S≤0.040mass%, molten iron temperature >=1250 DEG C.
The main slag making materials lime added in converting process：CaO ＞ 90mass%, SiO2≤ 1.5mass%, S ＜
0.15mass%, activity degree ＞ 310ml.
2) smelting operation
(1) according to the content selection operation method of P in molten iron, if P ＜ 0.120mass% in hot metal composition, using single slag
Method is operated, if P >=0.120mass% in hot metal composition, is operated using double slag process；P is early removed in early slugging.Grasp according to double slags
Make, then during 4～6min of blowing, the slag of falling initial stage.Finishing slag basicity is contained by 3.2～3.6 controls, P, the S for reducing endpoint molten steel as far as possible
Amount.
(2) re-blow oxygen using highcasting speed, it is to avoid repeatedly after-blow, it is ensured that molten steel not peroxidating.Strive a catch carbon success,
Improve the carbon content in molten steel.
(3) ensure tapping hole in order, using scum rod slag-stopping tapping；Guarantee during tapping C >=0.06mass%, P≤
0.015mass%；If tapping C ＜ 0.06mass% or after-blow number of times are more than 2 times, change the common steel grade of refining.
(4) ladle is required：Red packet tapping is required, that is, ladle temperature >=900 DEG C before tapping, ladle bottom blowing brick are unimpeded, steel
Bag is clean, must not have bag edge, it is ensured that ladle nozzle is automatically opened up during continuous casting.
(5) deoxidation alloying system
Silicon is matched somebody with somebody using fero-manganesesilicon, not enough manganese ferromanganese polishing, vanadium iron match somebody with somebody vanadium；With SiAlCaBa or SiCaBa double deoxidizers
Final deoxidizing is carried out, addition is 120kg/ stoves, if endpoint molten steel oxidisability is strong, suitably increase the consumption of double deoxidizer extremely
121～130kg/ stoves.
(6) process liquid steel temperature control is shown in Table 3.
3 process liquid steel temperature of table
3) LF stoves refining
(1) LF stoves refinery practice flow process：Molten steel enters refining station → bottom blowing Ar, thermometric, sampling → enter position (entrance refining position
Put) → power transmission, break shell → heat, make white slag → thermometric → temperature regulating, be tuned into point → thermometric → go out position → feed silk, sampling → soft
Blow Ar → plus heat preserving agent → continuous casting.
(2) enter refining station molten steel composition
In the tapping process of converter smelting, by deoxidation alloying, under the composition of molten steel is reached in steel grade regulation
Limit value, reduces the alloy addition in LF stove refining process, and the molten steel composition and temperature target for entering LF refining station is shown in Table 4.
Table 4 enters the molten steel composition and temperature target at LF refining station
(3) refining operation
1. molten steel arrives at a station, strong BOTTOM ARGON BLOWING break shell, thermometric.
2. at a temperature of arriving at a station accordingly, using corresponding electrode gear slugging, first slag charge (lime, refining are added
Slag, bauxite etc.), using fluorite shoddye, liquid white slag is formed in power supply 8min, and is kept for the white slag time be not less than 10min.
White slag is made using calcium carbide, SiFe powder (granularity≤3mm), the consumption of Al is reduced as far as possible.Refining process adjusts argon bottom-blowing flow,
Prevent refining from turning over greatly excessive slag, and adjust dedusting fan air quantity, it is ensured that refining furnace micro-pressure operation.
3. refining terminates, and feeding 30 meters/stove of calcium line carries out molten steel Calcium treatment, and after line feeding, soft argon blowing time is more than 8 minutes, soft
During Argon, the ladle top of the slag springs up not exposed molten steel slightly.
4. refining cycle is controlled by 42 ± 1min.
(4) go out refining station molten steel composition
In refining process, by finely tuning molten steel composition, finished product requirement is made up to, the molten steel composition for going out LF refining station is shown in
Table 5.
Table 5 goes out the molten steel composition at LF refining station
4) continuous casting
(1) in casting process, it is to avoid steel contacts air, i.e. full guard are poured into a mould, and adopt M-EMS.
(2) casting blank section is 150mm × 150mm.
(3) liquidus temperature for calculating：20MnV is 1509 DEG C, and 25MnV is 1507 DEG C.Middle Baogang's coolant-temperature gage control
It is shown in Table 6.
6 molten steel temperature in tundish of table
(4) ensure during continuous casting in the middle of full that package operation, i.e. Metal in Tundish liquid level are 600-700mm, tundish
Company pours process liquid level and must not be less than 400mm.
(5) M-EMS Current 200A, frequency 4Hz.
(6) casting speed 1.90m ± 0.02m/min, secondary cooling zone specific water are 0.90-1.25L/kg (i.e. every kilogram steel
0.90-1.25 rises water).
(7) strand straightening temperature >=900 DEG C, avoid straightening cracks susceptibility temperature range.
(8) taking 1 piece of casting blank sample per stove steel carries out macroscopic examination, and strand macroscopic examination quality objective is required：Center porosity
≤ 1.0 grades, shrinkage cavity≤0.5 grade, non-metallic inclusion≤0.5 grade, centre burst≤1.0 grade, middle crack≤1.0 grade own
The rank sum of assay is less than 3.0 grades.
(9) strand indicates heat (batch) number, steel grade, and, on other hot bases, wind sheltering heap is cold for casting blank stacking, the time >=8h, concentrates tissue
Rolling.Steel billet is identified：20MnV mark 2V, 25MnV mark 5V.
5) steel rolling
(1) heating-up temperature
Furnace temp is controlled：Bringing-up section 1100-1200 DEG C, 1080-1130 DEG C of soaking zone, start rolling temperature 980-1030
DEG C, 1000 DEG C of desired value controls furnace atmosphere, reduces iron scale.Heating steel billet should be uniform, steel billet head, in, the tail temperature difference≤
30 DEG C, in heating process, prevent steel billet from the phenomenons such as overheated, burning occur.
(2) roll control
1. rolling specs：φ18mm、φ20mm.
2. mill speed：8～15 meter per seconds.
3. behaviour in service and water-cooling system that each machine frame rolling mill imports and exports guide and guard, groove and roller-way are checked before rolling
Confirm, it is ensured that meet production technology and product quality is required.
4. rolled piece enters finishing mill temperature：900～970 DEG C.
5. not Water cooling after rolling.
6. temperature during the cold bed in overhead：880～930 DEG C.
7. timely handling stacking after steels strapping, wind sheltering heap are cold, heap cool time >=8h.
6) size Control and examination requirements
Production process should increase sampling time when increasing on-line period and the dimensional measurement frequency, open rolling or the abnormal operation of rolling
Number, appearance and size are required be controlled, check according to standard GB/T 702-2008 standards and user.
Claims (7)
1. a kind of production technology of circle chain of mine steel, it is characterised in that comprise the steps：
(1) converter smelting
A. molten iron is blended into in converter, in the molten iron being blended into, composition includes：Si=0.20～0.80mass%, Mn=0.30～
0.80mass%, P≤0.140mass%, S≤0.040mass%；Molten iron temperature >=1250 DEG C；
In the main slag making materials lime added in converting process, composition includes：CaO ＞ 90mass%, SiO2≤ 1.5mass%, S
＜ 0.15mass%；Activity of lime ＞ 310ml；
B. according to the content selection operation method of P in molten iron, if P ＜ 0.120mass% in hot metal composition, grasped using single slag process
Make；If P >=0.120mass% in hot metal composition, operated using double slag process；Finishing slag basicity is controlled 3.2～3.6；
C. re-blow oxygen using highcasting speed, it is to avoid repeatedly after-blow, it is ensured that molten steel not peroxidating, strive a catch carbon success, improved
Carbon content in molten steel；
D. for ensureing tapping hole in order, using scum rod slag-stopping tapping；Guarantee during tapping C >=0.06mass%, P≤
0.015mass%；
E. ladle is required：Red packet is tapped, that is, empty ladle temperature >=900 DEG C before tapping, ladle bottom blowing brick are unimpeded, and ladle is clean,
There must not be bag edge, it is ensured that ladle nozzle is automatically opened up during continuous casting；
F. silicon is matched somebody with somebody using fero-manganesesilicon, not enough manganese ferromanganese polishing, vanadium iron match somebody with somebody vanadium；Entered with SiAlCaBa or SiCaBa double deoxidizers
Row final deoxidizing, addition are 120kg/ stoves.
(2) LF stoves refining
A. white slag is made using calcium carbide, SiFe powder, the consumption for reducing Al as far as possible forms liquid white slag in power supply 8min, and keeps
The white slag time is not less than 10min；
B. refining terminates, and feeding 30 meters/stove of calcium line carries out molten steel Calcium treatment, and after line feeding, soft argon blowing time is more than 8min, soft blow argon
When, the ladle top of the slag springs up not exposed molten steel slightly；
(3) continuous casting：In casting process, poured into a mould using full guard, it is to avoid steel contacts air, and stirred using crystallizer electricity；Even
Ensure package operation in the middle of full during casting cast.
(4) steel rolling
A. furnace temp control before steel rolling：Bringing-up section 1100-1200 DEG C, 1080-1130 DEG C of soaking zone, start rolling temperature 980-
1030 DEG C, 1000 DEG C of desired value.
B. roll control：Mill speed 8-15 meter per second, rolled piece enter finishing mill temperature 900-970 DEG C, not Water cooling after rolling,
Overhead cold bed air cooling, temperature during the cold bed in overhead：880-930℃.
(5) bundling is stacked：Timely handling stacking after steels strapping, wind sheltering heap are cold, heap cool time >=8h.
2. the production technology of a kind of circle chain of mine steel according to claim 1, it is characterised in that：(1) the converter smelting
In refining b step, if selecting double slag operation, during blowing 4-6 minutes, the slag of falling initial stage.
3. the production technology of a kind of circle chain of mine steel according to claim 1, it is characterised in that：(1) the converter smelting
In refining Step d, if C ＜ 0.06mass% or after-blow number of times are more than 2 times during tapping, change the common steel grade of refining.
4. the production technology of a kind of circle chain of mine steel according to claim 1, it is characterised in that：(1) the converter smelting
In refining f steps, if endpoint molten steel oxidisability is strong, increase the consumption of SiAlCaBa or SiCaBa double deoxidizers to 121～
130kg/ stoves.
5. the production technology of a kind of circle chain of mine steel according to claim 1, it is characterised in that：(2) the LF stoves essence
Refine in a steps, the SiFe Powder Particle Sizes≤3mm for being adopted.
6. the production technology of a kind of circle chain of mine steel according to claim 1, it is characterised in that：In step (3),
Metal in Tundish liquid level is 600-700mm, and tundish company pours process liquid level and must not be less than 400mm；M-EMS
Electric current 200A, frequency 4Hz；Casting speed 1.90m ± 0.02m/min, secondary cooling zone specific water be 0.90-1.25L/kg (i.e. per thousand
Gram steel 0.90-1.25 rises water)；Strand straightening temperature >=900 DEG C.
7. the production technology of a kind of circle chain of mine steel according to claim 1, it is characterised in that：(4) the steel rolling a steps
In rapid, should be uniform during heating steel billet, steel billet head, in, the tail temperature difference≤30 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610952185.5A CN106498116B (en) | 2016-10-27 | 2016-10-27 | A kind of production technology of circle chain of mine steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610952185.5A CN106498116B (en) | 2016-10-27 | 2016-10-27 | A kind of production technology of circle chain of mine steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106498116A true CN106498116A (en) | 2017-03-15 |
| CN106498116B CN106498116B (en) | 2018-09-18 |
Family
ID=58322302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610952185.5A Active CN106498116B (en) | 2016-10-27 | 2016-10-27 | A kind of production technology of circle chain of mine steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106498116B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111349739A (en) * | 2018-12-21 | 2020-06-30 | 新疆八一钢铁股份有限公司 | Refining method for improving qualified rate of AISI3130 hot upsetting test of sucker rod steel |
| CN113293333A (en) * | 2021-05-21 | 2021-08-24 | 石横特钢集团有限公司 | Production method of weather-resistant angle steel billet |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1827822A (en) * | 2006-04-07 | 2006-09-06 | 宣化钢铁集团有限责任公司 | Lo-cost steel for circular chain for mine and production process thereof |
| CN101397636A (en) * | 2007-09-25 | 2009-04-01 | 宝山钢铁股份有限公司 | High toughness ring chain steel for mine and method for producing the same |
| CN103276303A (en) * | 2013-06-07 | 2013-09-04 | 南京钢铁股份有限公司 | High strength chain steel for mine, and preparation method thereof |
| CN105200320A (en) * | 2015-10-26 | 2015-12-30 | 江苏省沙钢钢铁研究院有限公司 | Steel for small-sized round-link chain |
| CN105401070A (en) * | 2015-12-18 | 2016-03-16 | 首钢水城钢铁（集团）有限责任公司 | Production method of finish rolling twisted steel for prestressed concrete |
-
2016
- 2016-10-27 CN CN201610952185.5A patent/CN106498116B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1827822A (en) * | 2006-04-07 | 2006-09-06 | 宣化钢铁集团有限责任公司 | Lo-cost steel for circular chain for mine and production process thereof |
| CN101397636A (en) * | 2007-09-25 | 2009-04-01 | 宝山钢铁股份有限公司 | High toughness ring chain steel for mine and method for producing the same |
| CN103276303A (en) * | 2013-06-07 | 2013-09-04 | 南京钢铁股份有限公司 | High strength chain steel for mine, and preparation method thereof |
| CN105200320A (en) * | 2015-10-26 | 2015-12-30 | 江苏省沙钢钢铁研究院有限公司 | Steel for small-sized round-link chain |
| CN105401070A (en) * | 2015-12-18 | 2016-03-16 | 首钢水城钢铁（集团）有限责任公司 | Production method of finish rolling twisted steel for prestressed concrete |
Non-Patent Citations (1)
| Title |
|---|
| 孙利钘: "《25MnV钢冶炼生产实践》", 《山西冶金》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111349739A (en) * | 2018-12-21 | 2020-06-30 | 新疆八一钢铁股份有限公司 | Refining method for improving qualified rate of AISI3130 hot upsetting test of sucker rod steel |
| CN113293333A (en) * | 2021-05-21 | 2021-08-24 | 石横特钢集团有限公司 | Production method of weather-resistant angle steel billet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106498116B (en) | 2018-09-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106834960B (en) | A kind of automobile using boracic top grade gear steel and its production technology | |
| CN105861951B (en) | Nickel and stainless steel super large-scale continuous casting billet manufacture method | |
| CN101633038B (en) | Method for reducing surface defect of stainless steel continues casting blank | |
| CN103350202B (en) | The high-quality Automobile Gear Steels manufacture methods of SCr420HB | |
| CN110144433B (en) | Deoxidation slagging method of low-carbon aluminum killed steel | |
| CN112481551B (en) | Steel WB36V for power station and smelting and continuous casting production process thereof | |
| CN105441787B (en) | A kind of rope making production method of high-carbon steel gren rod | |
| CN107841687B (en) | A kind of smelting process of ultralow boron steel | |
| CN103642970A (en) | Smelting method of low-carbon aluminum killed steel | |
| CN100562591C (en) | Technology with smelting ferroferrite with sponge iron | |
| CN108004456A (en) | A kind of production method of GCr15 Bearing Steel Billets | |
| CN110343949A (en) | HRB400E high-strength anti-seismic steel bar production method and steel containing niobium vanadium | |
| CN115433809A (en) | Smelting production method of steel for high-strength prestressed steel strand with excellent drawing performance | |
| CN111793772A (en) | High-standard bearing steel efficient production process | |
| CN108486472A (en) | Containing V, Ti, N Micro Alloying pre-hardened plastic mold steel and preparation method thereof | |
| CN105002324A (en) | Heavy rail steel dotted impurity control method | |
| CN106893946A (en) | Using the low-carbon (LC) austenitic stainless steel including molybdenum and its production technology of smelting laterite-nickel ores | |
| CN106498116B (en) | A kind of production technology of circle chain of mine steel | |
| CN114107781A (en) | Method for rolling 635 MPa-grade high-strength steel bars by using billet waste heat in short process | |
| CN108913999A (en) | A kind of production method of 36~40mm of φ HRB500E spiral | |
| CN113528976A (en) | Non-quenched and tempered bar without surface cracks and preparation method thereof | |
| CN108193124A (en) | A kind of high-strength air corrosion-resistant steel muscle and preparation method thereof | |
| CN108193123A (en) | A kind of anti-corrosion reinforcing bar and preparation method thereof | |
| CN108251598B (en) | Carbon increasing and nitrogen controlling production method of medium-carbon high-alloy steel | |
| CN105568178A (en) | New manufacturing process of hot-rolled bar for carburized and quenched gear shaft of automobile transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |