CN109266960B - Using the tensile strength >=800MPa thin gauge weathering steel and method of short route production - Google Patents
Using the tensile strength >=800MPa thin gauge weathering steel and method of short route production Download PDFInfo
- Publication number
- CN109266960B CN109266960B CN201811122091.0A CN201811122091A CN109266960B CN 109266960 B CN109266960 B CN 109266960B CN 201811122091 A CN201811122091 A CN 201811122091A CN 109266960 B CN109266960 B CN 109266960B
- Authority
- CN
- China
- Prior art keywords
- control
- steel
- 800mpa
- tensile strength
- thin gauge
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
Abstract
Tensile strength >=800MPa thin gauge the weathering steel produced using short route, its component and wt% are as follows: C:0.04~0.09%, Si:0.20~0.40%, Mn:1.45~1.75%, Cu:0.05 ~ 0.30%, Cr:0.35 ~ 0.50%, V:0.02 ~ 0.05%, Ti:0.11 ~ 0.14%, Als:0.010~0.050%, P≤0.020%, S≤0.006%, N≤0.006%；Production method: sheet billet is casting continuously to form after routinely smelting；To sheet billet soaking；Two passage de-scalings；Seven passage finish rolling；Section cooling is to coiling temperature；It batches；It is smooth.The present invention keeps strip overall length thickness uniform, and plate shape and scroll are excellent, and the operation of rolling is stablized, and original kind lumber recovery is improved to 92% or more, achievees the purpose that batch substitutes cold-rolled products, meets the light-weighted demand of container.
Description
Technical field
The present invention relates to a kind of steel for container and production methods, definitely belong to tensile strength >=800MPa thin gauge collection
Vanning steel and production method, specially using the tensile strength >=800MPa thin gauge weathering steel and method of short route production.
Background technique
Weathering steel is widely used in railway transportation Production Container, and weathering steel used at present is mainly SPA-H, and surrender is strong
Spend rank in 350MPa, and use tensile strength >=800MPa high-strength weathering steel one side can reduce rolled steel dosage 12% with
On, reduce 5% or more Production Container cost.On the other hand, considerable economic benefit can be brought for steel mill, ton steel profit reaches
1200 yuan or more.Therefore, the development and application of high-strength weathering steel will generate significant economic and social benefit.
In addition, the lightweight of container is paid attention to increasingly, container industry pair under the overall situation background of national energy conservation and emission reduction
It is eager that weathering steel improves intensity, thinned specification demands.Thickness≤1.6mm high-strength weathering steel product relies primarily on the cold rolling of import
The cold-rolled products of material, domestic only only a few steel mill are able to satisfy the demand of high-end user.And it can directly be rolled using abbreviated system
System production tensile strength >=800MPa, thickness≤1.6mm weathering steel are realized " with hot Dai Leng ", are answered for substituting import cold rolling material
For the manufacture of railway transportation container, possess vast market prospect.
Through retrieving, application No. is 201410307408.3 Chinese invention patent, to disclose a kind of high molding high durable very thin
Format hot rolled steel plate and its CSP production technology.Its component and wt% are as follows: C:0.035~0.065%, Si:0.15~0.3%,
Mn:1.3~1.6%, Cu:0.12~0.2%, Cr:0.2~0.6%, Ni:0.1~0.2%, Ti:0.1~0.13%, Mo:
0.1~0.2%, Als:0.025~0.045%, P:0~0.018%, S:0~0.005%, N:0~0.006%, remaining is Fe
And inevitable impurity.Controlling of production process converter smelting tapping P is 0~0.012%；Crystallizer hot-fluid be 2.45~
2.55mw/m2, the specific water of continuous casting secondary cooling water is 1.77~1.83L/Kg, and opening and pouring thickness of strand is 65~75mm, through multiple
Wick-containing depresses to 55~60mm；Slab tapping temperature is 1230~1250 DEG C；Finishing temperature is 880~920 DEG C；Through section cooling
After batched, using the head ladder type of cooling, batch it is offline after be cooled to 280~320 DEG C with the cooling rate of≤10 DEG C/s after
It is rapidly cooled again.Thin specification steel plate obtained has high-mouldability while stablizing and obtaining high-intensitive and high-weatherability,
Product thickness is 1.2~2.0mm.A kind of sheet billet is disclosed application No. is 201710397940.2 Chinese invention patent to connect
Cast rolling production tensile strength >=800MPa railway container steel and method.Its component and wt% are as follows: C:0.08-0.12%,
Si:0.15~0.25%, Mn:1.3~1.5%, P :≤0.010%, S :≤0.008%, Cu:0.30~0.60%, Cr:0.50
~0.80%, Nb:0.010~0.025%, Ti:0.141~0.162%, Als:0.015~0.020%, N :≤0.005%.
Production stage: smelting, continuous casting simultaneously heat；Finish rolling；Conventional laminar flow is cooled to coiling temperature；It batches.It is compound micro- using Nb, Ti
Alloying process, and being combined with continuous casting and rolling technique of sheet bar matching is steel plate in yield strength >=700MPa, tensile strength >=
800MPa, elongation percentage A >=10%；Also have good cold-bending property and corrosion resisting property good, is able to satisfy and requires higher railway
The service performance demand of container high-strength weathering steel, product thickness are≤3.2mm.
Foregoing invention patent mainly for product mechanical property and application performance, in process of production for product
Stability contorting be related to it is less, actually using abbreviated system production tensile strength >=800MPa thin gauge weathering steel when, exist
Mill speed and the rolling load proximity device limit, strip steel head thickness is partially thin, and plate shape, coil shape control difficulty are big, the operation of rolling
Unstable equal professionals technical problem.Therefore, realize that tensile strength >=800MPa thin gauge weathering steel batch, stable rolling are
This field one of technological difficulties urgently to be resolved.
Summary of the invention
The invention reside in overcoming strip steel head thickness of the existing technology partially thin, plate shape, scroll are bad, and the operation of rolling is not
Stablize, causes original kind lumber recovery to be no more than 83% deficiency, it is uniform to provide a kind of strip overall length thickness, and plate shape and scroll are excellent
Good, the operation of rolling is stablized, make original kind lumber recovery improve to 92% or more using short route production tensile strength >=
800MPa thin gauge weathering steel and method.
Realize the measure of above-mentioned purpose:
Tensile strength >=800MPa thin gauge weathering steel, component and the weight percent content produced using short route
Are as follows: C:0.04~0.09%, Si:0.20~0.40%, Mn:1.45~1.75%, Cu:0.05~0.30%, Cr:0.35~
0.50%, V:0.02~0.05%, Ti:0.11~0.14%, Als:0.010~0.050%, P≤0.020%, S≤
0.006%, N≤0.006%, remaining is Fe and inevitable impurity.
Preferably: its component and weight percent content are as follows: C:0.052~0.073%, Si:0.20~0.35%,
Mn:1.52~1.75%, Cu:0.12~0.26%, Cr:0.35~0.46%, V:0.02~0.043%, Ti:0.11~
0.132%, Als:0.016~0.042%, P≤0.018%, S≤0.004%, N≤0.005%, remaining is Fe and can not keep away
The impurity exempted from.
Tensile strength >=800MPa thin gauge weathering steel method of the production using short route production, step:
1) sheet blank continuous casting is carried out after routinely smelting, and is controlled molten steel temperature in tundish at 1539~1549 DEG C, is controlled thin
Slab thickness is in 52~70mm, and casting machine pulling rate is in 3.5-5.5m/min；
2) soaking is carried out to sheet billet, for control tapping temperature at 1210~1280 DEG C, time inside furnace is not less than 30min；
3) continuous two passages de-scaling, the distance of the first and second passage de-scaling upper header nozzle of control to sheet billet surface are carried out
Respectively in 55~70mm；
4) carry out seven passage finish rolling: control finishing temperature is at 860~930 DEG C；And it performs the following operation and controls:
And it comes into operation tail part of band steel roll gap automatic control function in mm finishing mill unit；
F7 rack head forecast roll-force correction factor is adjusted to 0.50~0.90, amendment delay is in 100~200 millis
Second；It controls finish rolling F1~F4 frame side guide plate head short stroke and is decreased to positive 10 in positive 45~55mm, middle part and tail portion short stroke
~15mm；
F7 rack rolling reduction ratio is controlled 9~11%；
5) section cooling is to coiling temperature, and using carrying out in such a way that a collector opens a collector, sparse upper spray is cold
But；Control each side nozzle of laminar flow is then turned on after strip steel head runs more than 3 meters carries out jet flow cooling；Therebetween:
First group of roller-way lag rate of laminar flow is controlled 45%, it is subsequent, according to etc. rates to be gradually decremented to last group of roller-way stagnant
Rate is 25% afterwards；
6) it is batched, control coiling temperature is 600~660 DEG C；Coiling Tension Control is divided into three phases progress:
First stage uses constant tensile control, i.e., in 45~68N/mm2A fixed tension value is selected in range to be batched；
Second stage is controlled using constant moment of force, and control sequential is that coil diameter reaches after 1.2m to second stage knot in coiling process
Tension is decreased to 35-40N/mm by Shu Shi2；
Phase III subtracts control when control sequential is throws steel to F7 after F3 throwing steel using tail portion and gradually reduces to tension
25~30N/mm2；
7) it carries out smooth.
Preferably: during finish rolling, F7 rack head forecast roll-force correction factor is adjusted to 0.60~0.75, and amendment is prolonged
When at 120~160 milliseconds.
Preferably: in the finish rolling stage, controlling F7 rack rolling reduction ratio 9.6~10.5%.
The effect and mechanism of each element and master operation in the present invention:
C: being to improve the most economical effective element of hardness of steel, but the excessively high welding performance that can deteriorate steel of C content, the present invention are resistance to
Good welding performance will be had by waiting steel plate, and C content is designed as 0.04~0.09%.
Si: being conducive to improve intensity, the yield point of steel, while being also the important element for influencing Surfaces of Hot Rolled Strip quality,
To guarantee that the good surface quality of steel plate, Si content of the present invention are designed as 0.20~0.40%.
Mn: the intensity of steel can be improved by solution strengthening, but too high levels can weaken the resistance to corrosion of steel, reduce weldering
Performance is connect, Mn content of the present invention is designed as 1.45~1.75%.
Cu, Cr: being to improve the effective element of steel corrosion resistance, but when Cu content is higher, be easy to produce " copper brittleness " phenomenon,
So that the surface of steel is generated cracking, increases the brittleness and molding cracking probability of steel.The present invention is made by the Proper Match to Cu, Cr
Its with good corrosion resistance, Cu content control of the present invention the control of 0.05~0.30%, Cr content 0.35~
0.50%.
V: being Qiang Tan ﹑ nitride forming element, the intensity and toughness that steel can be improved in trace V in steel in cooling procedure can
Play the role of precipitation strength.V content of the present invention is designed as 0.02~0.05%.
Ti: being the cheapest microalloy element of cost, for the strengthening effect for reducing cost and having reached, strengthening mechanism
Mainly refined crystalline strengthening and precipitation strength, but Ti element is oxidizable, it can be because of the denaturation of covering slag in sheet blank continuous casting process
And generate bleed-out.Ti content is designed as 0.11~0.14% in steel of the present invention.
Als: having deoxidation in steel, refines crystal grain, improves the effect of toughness, but Als too high levels will affect the table of steel
Face quality, Als content of the present invention are designed as 0.010~0.050%.
P: being harmful element in steel, increase the cold brittleness of steel, welding performance is made to be deteriorated, and reduces plasticity.The present invention considers
The processability of weathering steel controls P≤0.020%.
S: being harmful element, so that steel is generated red brittleness, reduces the ductility and toughness of steel, to the corrosion resistance of steel also pole
To be unfavorable, therefore the S content in steel should be reduced as far as possible, control S≤0.006%.
N: easily generating TiN with Ti in molten steel and solidification of molten steel cooling procedure and be mingled with, to reduce in subsequent rolling and cold
But the amount of precipitation of TiC during, to influence the final mechanical property of steel plate, N content of the present invention is designed as≤0.006%.
Why the present invention controls molten steel temperature in tundish at 1539~1549 DEG C, is will lead to since liquid steel temperature is excessively high
The increase of sheet billet crackle will cause bleed-out accident under the conditions of casting machine pulling rate 3.5-5.5m/min；And the too low stream of liquid steel temperature
Dynamic property is poor, is unfavorable for inclusion floating, also results in the mouth of a river and freezes in turn result in and disconnected pours accident.
The present invention why control the first and second passage de-scaling upper header nozzle to sheet billet surface distance 55~
70mm.It is since the distance on collector nozzle to sheet billet surface is too small, will lead to fan-shaped surface that nozzle ejects can not all standing
The non-de-scaling in part is caused on entire sheet billet surface；The distance on collector nozzle to sheet billet surface is too big, can weaken de-scaling water to thin
The hitting power of steel slab surface, and then influence scale removal effect.
The present invention why control F7 rack rolling reduction ratio 9~11%, be since reduction ratio is too small, bending roller force without
Method compensates the variation of roll-force, and strip is easy to produce bilateral shape wave；Reduction ratio is excessive, is also unfavorable for Strip Shape Control, holds
Logical plate easily occurs and rolls brokenly even steel scrap accident.
Why the present invention controls finish rolling F1~F4 frame side guide plate head short stroke in positive 45~55mm, middle part and tail portion
Short stroke is decreased to positive 10~15mm.It is since thin gauge strip rolling has sideslip end to end, the short row in flipper guide head
Journey setting is larger to can be improved logical plate stability, effectively avoids not biting steel scrap accident because of head sideslip bring；Middle part and tail portion
Short stroke reduces the clamping action that can play flipper guide to greatest extent, reduces tail deviation whipping accident.
Why the present invention controls first group of roller-way lag rate of laminar flow 45%, subsequent, according to etc. rates be gradually decremented to most
Later group roller-way lag rate is 25%；When being due to rolling, unit tension is larger, and strip is in after finish rolling end rack throwing steel
A state is lost, tail part of band steel can swing in laminar flow roller-way, and then generate tail portion misalignment.Increased by increasing roller-way lag rate
The backward pull that strong roller-way provides, after strip throws steel from finish rolling end rack, reduction tail part of band steel, can in laminar flow roller-way amplitude of fluctuation
Tail portion misalignment is effectively avoided, scroll quality is improved.
Why the present invention takes Coiling Tension Control be divided into three phases progress in coil ing one:
First stage uses constant tensile control, i.e., in 45~68N/mm2A fixed tension value is selected in range to be batched；
Second stage is controlled using constant moment of force, and control sequential is that coil diameter reaches after 1.2m to second stage knot in coiling process
Tension is decreased to 35-40N/mm by Shu Shi2；
Phase III subtracts control when control sequential is throws steel to F7 after F3 throwing steel using tail portion and gradually reduces to tension
25~30N/mm2；It is there are problems that flat volume and tail portion misalignment since tensile strength >=800MPa thin gauge weathering steel batches, first
Stage is to ensure that coil of strip internal layer rolls tightly, and tension suitably increases, and the support force of inner ring of steel coil can be improved, and avoids the occurrence of flat volume；Second
Stage is to ensure winding machinery equipment safety, and tension reduces with the increase of coil of strip coil diameter, and torque is kept constant；Phase III
To avoid tail portion overtension from generating misalignment, tension suitably reduces.Coiling tension can effectively solve to resist using above-mentioned control method
The bad problem of scroll in tensile strength >=800MPa thin gauge weathering steel coiling process.
Compared with prior art, it is inclined to solve tensile strength >=800MPa thin gauge weathering steel strip steel head thickness by the present invention
Thin, plate shape, scroll are bad, and the operation of rolling is unstable, cause original kind lumber recovery to be no more than 83% technical problem, realize short
Process rolls tensile strength >=high quality of 800MPa thin gauge weathering steel, high stability large-scale production, keeps strip overall length thick
Uniformly, plate shape and scroll are excellent for degree, and the operation of rolling is stablized, and original kind lumber recovery is improved to 92% or more, reach batch substitute it is cold
The purpose for rolling product meets the light-weighted demand of container.
Specific embodiment
The present invention is described in detail below:
Table 1 is the chemical component list of various embodiments of the present invention and comparative example；
Table 2 is the main technologic parameters list of various embodiments of the present invention and comparative example；
Table 3 is mechanics properties testing and the quality condition list of various embodiments of the present invention and comparative example.
Various embodiments of the present invention follow the steps below production:
1) sheet blank continuous casting is carried out after routinely smelting, and is controlled molten steel temperature in tundish at 1539~1549 DEG C, is controlled thin
Slab thickness is in 52~70mm, and casting machine pulling rate is in 3.5-5.5m/min；
2) soaking is carried out to sheet billet, for control tapping temperature at 1210~1280 DEG C, time inside furnace is not less than 30min；
3) continuous two passages de-scaling, the distance of the first and second passage de-scaling upper header nozzle of control to sheet billet surface are carried out
Respectively in 55~70mm；
4) carry out seven passage finish rolling: control finishing temperature is at 860~930 DEG C；And it performs the following operation and controls:
And it comes into operation tail part of band steel roll gap automatic control function in mm finishing mill unit；
F7 rack head forecast roll-force correction factor is adjusted to 0.50~0.90, amendment delay is in 100~200 millis
Second；It controls finish rolling F1~F4 frame side guide plate head short stroke and is decreased to positive 10 in positive 45~55mm, middle part and tail portion short stroke
~15mm；
F7 rack rolling reduction ratio is controlled 9~11%；
5) section cooling is to coiling temperature, and using carrying out in such a way that a collector opens a collector, sparse upper spray is cold
But；Control each side nozzle of laminar flow is then turned on after strip steel head runs more than 3 meters carries out jet flow cooling；Therebetween:
First group of roller-way lag rate of laminar flow is controlled 45%, it is subsequent, according to etc. rates to be gradually decremented to last group of roller-way stagnant
Rate is 25% afterwards；
6) it is batched, control coiling temperature is 600~660 DEG C；Coiling Tension Control is divided into three phases progress:
First stage uses constant tensile control, i.e., in 45~68N/mm2A fixed tension value is selected in range to be batched；
Second stage is controlled using constant moment of force, and control sequential is that coil diameter reaches after 1.2m to second stage knot in coiling process
Tension is decreased to 35-40N/mm by Shu Shi2；
Phase III subtracts control when control sequential is throws steel to F7 after F3 throwing steel using tail portion and gradually reduces to tension
25~30N/mm2；
7) it carries out smooth.
The chemical component (wt.%) of 1 various embodiments of the present invention of table and comparative example
The main technologic parameters comparative example of 2 various embodiments of the present invention of table and comparative example
The mechanics properties testing and quality condition list of 3 various embodiments of the present invention of table and comparative example
Illustrate: in each comparative example, F7 rack head forecast roll-force not being modified.In each embodiment, control layer
It flows each side nozzle to be then turned on after strip steel head passes through, blows afloat strip steel head to avoid side spray；Control first group of roller-way of laminar flow
For lag rate 45%, subsequent echelon is decremented to last group of roller-way lag rate 25%.Enhanced by increasing roller-way lag rate
The backward pull that roller-way provides can effectively avoid tail portion misalignment, improve scroll quality.
From table 3 it can be seen that the production board shape and scroll of comparative example 1 and 2 are bad, there are shape wave and flat volume, original kind at
Material rate is no more than 83%.Short route of the present invention rolls tensile strength >=800MPa thin gauge weathering steel, and thickness specification is 1.0~
4.0mm, and the operation of rolling is stablized, it is not easy to it is partially thin strip steel head thickness occur, and threading nose throws the phenomenon that steel whipping, original
Kind lumber recovery is 92% or more.Product has the characteristics that intensity is high, specification is thin, plate shape and scroll are excellent, forming property and same
Rank cold-rolled products are suitable, and when curved diameter d=1.5a, 180 ° of qualifications of wide clod wash achieve the purpose that batch substitutes cold-rolled products.In sea
It can be used for manufacturing side plate, bottom plate, top plate and corner post etc. in fortune Production Container.
Present embodiment is only the best example, not to the restricted implementation of technical solution of the present invention.
Claims (3)
1. tensile strength >=800MPa thin gauge weathering steel method that production is produced using short route, step:
1) sheet blank continuous casting is carried out after routinely smelting, and controls molten steel temperature in tundish at 1539 ~ 1549 DEG C, control sheet billet is thick
Degree is in 52 ~ 70mm, and casting machine pulling rate is in 3.5-5.5m/min；
2) soaking is carried out to sheet billet, for control tapping temperature at 1210 ~ 1280 DEG C, time inside furnace is not less than 30min；
3) continuous two passages de-scaling is carried out, the distance on the first and second passage de-scaling upper header nozzle to sheet billet surface of control respectively exists
55~70mm；
4) carry out seven passage finish rolling: control finishing temperature is at 860 ~ 930 DEG C；And it performs the following operation and controls:
And it comes into operation tail part of band steel roll gap automatic control function in mm finishing mill unit；
F7 rack head forecast roll-force correction factor is adjusted to 0.50 ~ 0.90, amendment delay is at 100 ~ 200 milliseconds；Control
Finish rolling F1 ~ F4 frame side guide plate head short stroke is decreased to positive 10 ~ 15mm in positive 45 ~ 55mm, middle part and tail portion short stroke；
F7 rack rolling reduction ratio is controlled 9 ~ 11%；
5) section cooling is cooled down to coiling temperature using carrying out sparse upper spray in such a way that a collector opens a collector；Control
Each side nozzle of preparative layer stream is then turned on after strip steel head runs more than 3 meters carries out jet flow cooling；Therebetween:
First group of roller-way lag rate of laminar flow is controlled 45%, it is subsequent, according to etc. rates be gradually decremented to last group of roller-way lag rate
25%；
6) it is batched, control coiling temperature is 600 ~ 660 DEG C；Coiling Tension Control is divided into three phases progress:
First stage uses constant tensile control, i.e., in 45 ~ 68N/mm2A fixed tension value is selected in range to be batched；
Second stage is controlled using constant moment of force, and control sequential is that coil diameter reaches and terminates after 1.2m to second stage in coiling process
When, tension is decreased to 35-40N/mm2；
Phase III subtracts control using tail portion, and control sequential is that F3 is thrown when throwing steel to F7 after steel, tension is gradually reduced to 25 ~
30N/mm2；
7) it carries out smooth；
Tensile strength >=800MPa thin gauge weathering steel, component and the weight percent content produced using short route
Are as follows: C:0.04~0.09%, Si:0.20~0.40%, Mn:1.45~1.75%, Cu:0.05 ~ 0.30%, Cr:0.35 ~ 0.50%, V:
0.02 ~ 0.05%, Ti:0.11 ~ 0.14%, Als:0.010~0.050%, P≤0.020%, S≤0.006%, N≤0.006%, remaining
For Fe and inevitable impurity.
2. production as described in claim 1 is using tensile strength >=800MPa thin gauge weathering steel side of short route production
Method, it is characterised in that: during finish rolling, F7 rack head forecast roll-force correction factor is adjusted to 0.60 ~ 0.75, amendment delay
At 120 ~ 160 milliseconds.
3. production as described in claim 1 is using tensile strength >=800MPa thin gauge weathering steel side of short route production
Method, it is characterised in that: in the finish rolling stage, control F7 rack rolling reduction ratio 9.6 ~ 10.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811122091.0A CN109266960B (en) | 2018-09-26 | 2018-09-26 | Using the tensile strength >=800MPa thin gauge weathering steel and method of short route production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811122091.0A CN109266960B (en) | 2018-09-26 | 2018-09-26 | Using the tensile strength >=800MPa thin gauge weathering steel and method of short route production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109266960A CN109266960A (en) | 2019-01-25 |
| CN109266960B true CN109266960B (en) | 2019-11-26 |
Family
ID=65198954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811122091.0A Active CN109266960B (en) | 2018-09-26 | 2018-09-26 | Using the tensile strength >=800MPa thin gauge weathering steel and method of short route production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109266960B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112063920B (en) * | 2020-08-06 | 2021-12-24 | 湖南华菱涟钢特种新材料有限公司 | Thin container plate and preparation method thereof |
| CN112111690B (en) * | 2020-08-06 | 2022-03-25 | 湖南华菱涟钢特种新材料有限公司 | Thin-specification high-strength container plate and preparation method thereof |
| CN112044956B (en) * | 2020-08-31 | 2022-07-15 | 武汉钢铁有限公司 | Method for eliminating short-process production of 1.175mm high-strength steel coiled oval coil |
| CN114535294A (en) * | 2022-03-14 | 2022-05-27 | 武汉钢铁有限公司 | Method for producing hot-rolled strip steel with thickness of 1.0mm by CSP production line |
| CN114602973B (en) * | 2022-03-14 | 2024-01-26 | 湖南华菱涟源钢铁有限公司 | Method for producing ultrathin checkered plates with tensile strength of 800MPa in CSP short process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106734201A (en) * | 2016-12-27 | 2017-05-31 | 中冶南方工程技术有限公司 | A kind of method that application continuous casting and rolling technique of sheet bar produces Thin Specs low-alloy high-strength steel |
| CN106734200A (en) * | 2016-12-27 | 2017-05-31 | 中冶南方工程技术有限公司 | A kind of method that application continuous casting and rolling technique of sheet bar produces Thin Specs dual phase steel |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100507055C (en) * | 2006-08-31 | 2009-07-01 | 宝山钢铁股份有限公司 | Yield strength 700MPa grade atmospheric corrosion resistant steel and method for manufacturing same |
| CN100435987C (en) * | 2006-11-10 | 2008-11-26 | 广州珠江钢铁有限责任公司 | Method for manufacturing 700MPa high-strength weathering steel based on thin slab continuous casting and rolling flow by use of Ti microalloying process |
| CN101550520A (en) * | 2008-03-31 | 2009-10-07 | 鞍钢股份有限公司 | 600MPa level hot rolling thin steel plate and manufacturing method thereof |
| CN102011060A (en) * | 2010-09-30 | 2011-04-13 | 广州珠江钢铁有限责任公司 | 700MPa-grade cold rolled steel plate with high weather resistance and preparation method thereof |
| CN107557678B (en) * | 2016-06-30 | 2019-02-26 | 鞍钢股份有限公司 | Inexpensive 550MPa grades of hot rolling container weathering steel and its manufacturing method |
| CN107779740B (en) * | 2016-08-26 | 2019-02-26 | 鞍钢股份有限公司 | Yield strength 700MPa grade atmospheric corrosion resistant hot rolled strip and manufacturing method |
| CN106756563A (en) * | 2017-01-10 | 2017-05-31 | 河钢股份有限公司承德分公司 | Tensile strength 800MPa grades of Ultra-thin broad hot strip and production method |
| CN106947913B (en) * | 2017-03-21 | 2019-03-19 | 马钢(集团)控股有限公司 | A kind of high-strength high-toughness hot rolls weather-resistant steel plate and preparation method thereof |
| CN107190202B (en) * | 2017-05-31 | 2019-05-24 | 武汉钢铁有限公司 | Tensile strength >=800MPa railway container steel and method are produced with thin slab continuous casting and rolling |
| CN107460413B (en) * | 2017-08-16 | 2019-05-17 | 北京科技大学 | A kind of preparation method and application of 550MPa grades of Ultra-fine Grained high-strength weathering steel |
| CN107475624A (en) * | 2017-08-16 | 2017-12-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Titaniferous think gauge weathering steel and its production method |
| CN107641759B (en) * | 2017-09-13 | 2021-08-13 | 武汉钢铁有限公司 | Method for producing thin-specification hot forming steel based on CSP (cast Steel plate) process |
| CN107695099B (en) * | 2017-09-20 | 2019-07-09 | 武汉钢铁有限公司 | Method based on CSP process production thin gauge hot rolling DP600 steel |
| CN107641699B (en) * | 2017-09-20 | 2019-06-18 | 武汉钢铁有限公司 | Method based on CSP process production thin gauge hot rolling DP780 steel |
| CN107641700B (en) * | 2017-09-20 | 2019-01-25 | 武汉钢铁有限公司 | Method based on CSP process production thin gauge hot rolling DP1180 steel |
| CN107716551B (en) * | 2017-09-20 | 2019-07-09 | 武汉钢铁有限公司 | Method based on CSP process production thin gauge hot rolling DP980 steel |
| CN107829024A (en) * | 2017-10-16 | 2018-03-23 | 首钢京唐钢铁联合有限责任公司 | A kind of 700MPa levels above superhigh intensity weather-resistant steel plate and its hot continuous rolling process |
| CN108130488A (en) * | 2017-12-21 | 2018-06-08 | 南京钢铁股份有限公司 | Anti-corrosion steel plate, the method that the steel plate is prepared using steekle mill and its application in rolling stock |
| CN108342662B (en) * | 2018-02-23 | 2020-03-10 | 柳州钢铁股份有限公司 | High-strength weathering steel with yield strength of 550MPa |
| CN108251737B (en) * | 2018-02-23 | 2019-12-17 | 柳州钢铁股份有限公司 | Manufacturing method of high-strength weathering steel with yield strength of 550MPa |
| CN108239722B (en) * | 2018-03-02 | 2019-10-22 | 山东钢铁股份有限公司 | A kind of the Weather-resistance bridge steel plate and its production method of yield strength >=420MPa |
| CN108486466B (en) * | 2018-04-23 | 2019-11-19 | 马钢(集团)控股有限公司 | A kind of yield strength 550MPa grade high ductility weather-resistant steel plate and preparation method thereof |
-
2018
- 2018-09-26 CN CN201811122091.0A patent/CN109266960B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106734201A (en) * | 2016-12-27 | 2017-05-31 | 中冶南方工程技术有限公司 | A kind of method that application continuous casting and rolling technique of sheet bar produces Thin Specs low-alloy high-strength steel |
| CN106734200A (en) * | 2016-12-27 | 2017-05-31 | 中冶南方工程技术有限公司 | A kind of method that application continuous casting and rolling technique of sheet bar produces Thin Specs dual phase steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109266960A (en) | 2019-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109338212B (en) | Using the yield strength >=550MPa thin gauge weathering steel and method of short route production | |
| CN109266960B (en) | Using the tensile strength >=800MPa thin gauge weathering steel and method of short route production | |
| CN109266961B (en) | Using the 600MPa grade thin gauge Hot Rolling Automobile structural steel and method of short route production | |
| CN102352469A (en) | Ultrahigh-strength vanadium-titanium composite microalloyed high carbon steel wire rod and preparation method thereof | |
| CN100540708C (en) | High strength ship hull structure use steel and coiled sheet production method thereof | |
| CN1970811B (en) | High-strength cold-roll-forming structural steel and method for producing same | |
| CN112522581B (en) | Method for producing 30CrMo hot rolled steel plate/strip by strip continuous casting | |
| CN110735085A (en) | Manufacturing method of thin Q345qE and Q370qE steel plates | |
| CN107245656A (en) | The fin steel and its CSP production technologies of a kind of excellent surface quality | |
| CN112522579B (en) | 30CrMo hot rolled steel plate/strip made of scrap steel and production method thereof | |
| CN114875339A (en) | Low-density cold-rolled thin steel strip with short process, low energy consumption and high tensile strength and manufacturing method thereof | |
| CN113751679B (en) | Manufacturing method of cobalt-free maraging steel cold-rolled thin strip | |
| JP2022549175A (en) | Thin high corrosion resistant steel and its manufacturing method | |
| CN103147005B (en) | A kind of TMCP type E36 deck of boat and manufacture method thereof with good low-temperature toughness | |
| CN112522593B (en) | Thin 30CrMo hot rolled steel plate/strip and production method thereof | |
| CN109023109B (en) | Using the 700MPa grade thin gauge Hot Rolling Automobile structural steel and method of short route production | |
| CN114395736B (en) | Vanadium microalloying production method for Q355B section steel | |
| CN115216710B (en) | Production method of low-density steel with tensile strength more than or equal to 2000MPa based on strip continuous casting | |
| CN112522599A (en) | Hot-rolled steel plate/strip for resisting sulfuric acid dew point corrosion and manufacturing method thereof | |
| CN109023110A (en) | Using the 500MPa grade thin gauge Hot Rolling Automobile structural steel and method of short route production | |
| CN112522585B (en) | Production method of thin hot rolled steel plate/strip for resisting sulfuric acid dew point corrosion | |
| CN111041369B (en) | Nb-Ti-N microalloyed hot-rolled ribbed steel bar and production method thereof | |
| CN113502430A (en) | Production method of low-alloy high-toughness F36 super-thick steel plate | |
| CN112522637B (en) | B-containing thin 30CrMo hot rolled steel plate/strip and manufacturing method thereof | |
| CN115233080B (en) | Production method of low-density steel with tensile strength of more than or equal to 1800MPa based on strip continuous casting |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |