CN107245656B - A kind of the fin steel and its CSP production technology of excellent surface quality - Google Patents
A kind of the fin steel and its CSP production technology of excellent surface quality Download PDFInfo
- Publication number
- CN107245656B CN107245656B CN201710455371.2A CN201710455371A CN107245656B CN 107245656 B CN107245656 B CN 107245656B CN 201710455371 A CN201710455371 A CN 201710455371A CN 107245656 B CN107245656 B CN 107245656B
- Authority
- CN
- China
- Prior art keywords
- steel
- section
- rolling
- fin
- surface quality
- 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
- 239000010959 steel Substances 0.000 title claims abstract description 47
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 238000005516 engineering process Methods 0.000 title claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000005096 rolling process Methods 0.000 claims abstract description 25
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- 238000002791 soaking Methods 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 241000277275 Oncorhynchus mykiss Species 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000498 cooling water Substances 0.000 claims abstract description 8
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 7
- 230000003647 oxidation Effects 0.000 claims abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 5
- 238000003723 Smelting Methods 0.000 claims abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 3
- 239000000446 fuel Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 21
- 238000000034 method Methods 0.000 abstract description 17
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000007812 deficiency Effects 0.000 abstract description 4
- 238000007670 refining Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 11
- 238000005098 hot rolling Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000002131 composite material Substances 0.000 description 5
- 238000009749 continuous casting Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 235000013372 meat Nutrition 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- -1 oxonium ion Chemical class 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
A kind of fin steel of excellent surface quality, component and wt% are as follows: C: it is no more than 0.01%, Mn:0.18~0.30%, Si:0~0.02%, Als: is no more than 0.005%, P:0~0.03%, S:0~0.01%, N:0.002~0.007%.Its technique: converter smelting；The refining of LF furnace；Slab enters soaking pit soaking；Using high-pressure water descaling；Before the rolling of each rack, first starts gap cooling water, carry out finish rolling using seven rack units afterwards；Section cooling；It batches.It is on the high side that the present invention solves fin steel oxidation iron sheet defect, and strip steel head and tail portion hit coiling clamp roller in the case where losing a state and generate the deficiency of roll marks defect, and the advantage of abbreviated system is given full play to, the coil of strip entire volume thickness and precision produced is fluctuated in 30 μm, entire volume length direction strength fluctuation within 20Mpa.
Description
Technical field
The present invention relates to a kind of ultra-low-carbon steel and its CSP production technologies, particularly belong to a kind of fin of excellent surface quality
Steel and its CSP manufacturing technique method.
Background technique
Fin steel is the raw material of finned heat exchanger.The one kind of finned heat exchanger as heat-exchange device, is changed by it
Hot cell is similar to fin and gains the name, and is mainly used for air in drying system and heats, is the capital equipment in hot air apparatus.Thermal medium
It can be steam or hot water, it is also possible to which conduction oil is passed because, around piece, radiating fin and heat-dissipating pipe contact surface are big and tight using machinery
Hot property is good, stablizes, and air is small by preventing, and heat exchange efficiency is high.For energy-saving and environment-friendly demand, fin output of steel in recent years
Steady-state growth at home.Fin steel belongs to ultra-low-carbon steel, subsequent to carry out pickling, slitting and composite rolling, special use
Way and manufacturing process, Surface Quality, plate shape, thickness and precision etc. require harsh.Surface is not allow for iron scale, greasy dirt, roller
The defects of print, the problems such as bubble, peeling are otherwise easily generated in subsequent clad-rolling process, seriously affect composite rolling effect
Fruit.
Before making the present invention, fin steel is produced mainly using traditional hot rolling producing line production using heavy slab.Using
Traditional heavy slab and conventional hot rolling producing line are produced, and existing deficiency is: (1) product thickness precision is low: after fin steel
Continuous process flow is pickling, slitting, composite rolling, and transverse direction and longitudinal direction thickness difference is no more than 30 μm after customer requirement slitting, institute
It is very high to require hot rolling stock roll thickness and precision, it is desirable that convexity is no more than 50 μm, and wedge shape is no more than 20 μm, and longitudinal thickness is poor
It must control within 30 μm, conventional hot rolling producing line is difficult to fully meet；(2) properties of product uniformity is poor: wanting when composite rolling
Long rolling load fluctuation of demanding perfection is small, it is desirable that hot rolling stock roll overall length strength fluctuation is within 30MPa, and conventional hot rolling producing line is because rising
The reason of speed rolling, cause strip end to end and middle portion temperature there are certain deviations, therefore overall length performance inconsistency is larger；(3) exist
Edge upwarping defect: when conventional hot rolling producing line produces, within edge 15-30mm there are edge upwarping defect, on the one hand
Lumber recovery is lower, on the other hand also results in more quality objection and complains and compensate；(4) production cycle is long: connecing and orders from contract
Coil of strip delivery generally needs 1 month time, hands over phase more urgent contract for customer requirement, it is difficult to which punctual delivery meets visitor
Family requires.
CSP production line is the sheet billet continuous casting and rolling production line of a new generation, and, pulling rate short with process be fast, steel-making steel rolling
Rigid connection, the features such as constant speed rolling temperature uniformity is good.It produces under this process condition, product thickness precision is high, performance wave
Move small, plate shape is excellent, while entering furnace to hot rolled coil offline only several hours time, specific condition lower delivery cycle from molten iron
It is short, it can preferably meet customer need.To give full play to thin slab continuous casting and rolling producing line advantage, preferably meet customer need,
Fin steel is transplanted to the production of CSP producing line.But when using CSP technique production fin steel, there are following deficiencies: (1) iron scale
Defect: the heating method and rolling mill practice of CSP producing line soaking pit are different from conventional hot rolling producing line, while dephosphorization equipment ability is again not
And conventional hot rolling producing line, scale defect control are always the weak link of continuous casting and rolling technique of sheet bar.On the one hand it influences
Fin steel coil pickled surface quality；On the other hand, many defect frames are formed on CSP surface quality detection instrument, influence is mingled with,
Checking and identifying for the other defects such as greasy dirt, easily leads to defect and fails to judge, and generates corrresponding quality objection.(2) coiling clamp roller roll marks
Defect: since fin steel steel is partially soft, strip steel head is easy to form coiler pinch-roll and hit, cause in high-speed wind-up
The fractionlet etc. that strip steel head is peeled off is adhered to plus send roller surface, in subsequent coiling process, is pressed into belt steel surface, forms roller
Print defect.Iron scale and coiling clamp roller roll marks defect problem seriously constrain opening for the such high value added product of CSP producing line
Hair and propulsion.
Through retrieving, at present seldom there are above-mentioned surface quality problems, especially coiling clamp roller roll marks in routine hot rolling producing line
Defect.And similar CSP producing line is without the knowhow of similar fin steel, the solution that can not refer to and learn from.
Summary of the invention
It is an object of the invention to overcome the shortcomings of the prior art, solution fin steel oxidation iron sheet defect is on the high side, with
And strip steel head and tail portion hit coiling clamp roller in the case where losing a state and generate the deficiency of roll marks defect, and give full play to short stream
The advantage of journey technique, provide plate shape is excellent, thickness and precision fluctuation 30 μm, performance uniformity it is good, entire volume length direction intensity wave
Move the fin steel and its CSP manufacturing technique method of the excellent surface quality for meeting downstream Customer Quality requirement within 20Mpa.
Realize the measure of above-mentioned purpose:
A kind of fin steel of excellent surface quality, component and weight percent content are as follows: C: it is no more than 0.01%, Mn:
0.18~0.30%, Si:0~0.02%, Als: be no more than 0.005%, P:0~0.03%, S:0~0.01%, N:0.002~
0.007%, remaining is Fe and inevitable impurity.
Preferably: the weight percent content of C are as follows: 0.003 ~ 0.01%.
Preferably: the weight percent content of Mn are as follows: 0.20 ~ 0.30%.
Preferably: the weight percent content of N are as follows: 0.003~0.007%.
A kind of CSP production technology of the fin steel of excellent surface quality, step:
1) converter smelting is carried out, and controls P≤0.0015% in endpoint molten steel；
2) it is refined in LF furnace, and carries out RH application of vacuum, be cast into base in CSP conticaster later, control slab is thick
Degree is 70mm；
3) slab enters soaking pit progress soaking, controls slab tapping temperature at 1110~1140 DEG C；Time inside furnace does not surpass
Cross 35min；
Soaking pit takes " two-part " heating, it may be assumed that 1 ~ 5 section be bringing-up section, heating rate in 15 ~ 25 DEG C/min, and
Each section of air-fuel ratio is controlled in this stage 1.2 ~ 1.3；6 ~ 10 sections are soaking zone, control in this stage each section of air-fuel ratio 1.3 ~
1.4；
4) it using high-pressure water descaling to casting billet surface non-oxidation iron sheet, and controls de-scaling water inlet pressure and is not less than
200bar, outlet pressure are not less than 240bar；
5) before the rolling of each rack, first start gap cooling water；And finish rolling is carried out using seven rack units, control its end
Temperature is rolled at 880 ~ 920 DEG C；Strip steel head plate speed is controlled within 8.0m/s；
It is that 17, F3 setting value is that F1 setting value is 12, F2 setting value by adjustment F1-F4 rack roll gap cooling water timing
21.5, F4 setting values are 26；
6) section cooling is carried out, therebetween, leading portion opens the mode that a valve closes a valve using the interval type of cooling；And in steel
The length direction of band takes both ends low, the high coiling temperature mode of rest part, that is, take the lead and each 10m length of tail in, it is cold
But coiling temperature extremely is at 570 ~ 590 DEG C, and the cooling coiling temperature of rest part is at 610 ~ 630 DEG C.
7) it is batched.
The mechanism and effect of each element and main technique in the present invention:
C: in the present invention, the purpose for selecting Ultra-low carbon design is ferritic structure as much as possible in order to obtain, to subtract
Fe in few structure of steel3C phase, the excellent ferritic structure of plasticity and toughness are conducive to subsequent composite rolling.Meanwhile by C content control
The solid solution C content hereinafter, as far as possible in reduction ferrite is made 0.01%, so that ferritic structure is obtained profound purification, favorably
It is rolled in the subsequent metal composite good with ductility.
Mn: increasing the relative quantity of steel medium pearlite, and tissue made to attenuate, and improves intensity.In this steel grade, suitably reduction Mn
Content, guarantee suitable intensity.Meanwhile suitable Mn can eliminate the adverse effect of S, from this point of view, Mn is beneficial
Element, but when content is low, effect is not significant.Mn/S >=20 ~ 25 are generally required, control S in crystallization in the precipitation of crystal boundary, thus
Reduce hot-short sensibility of the steel billet in hot rolling.Accordingly, control Mn content is 0.18 ~ 0.30%.
Si: increasing the intensity of steel, reduces the ductility of steel, is unfavorable for the follow-up cold deformation performance of strip, thus it is more low more
It is good.Si content is controlled in the present invention 0~0.02%.
P: phosphorus is residual elements in steel, and maximum harm is that segregation is serious, increases temper brittleness, significantly reduces the modeling of steel
Property and toughness, cause steel to be easy embrittlement namely so-called " cold short " phenomenon in cold working.Phosphorus also has adverse effect to weldability,
It should strictly control, control P content is 0~0.03% in the present invention.
S: sulphur is segregated seriously in steel, deteriorates the quality of steel.At high temperature, the plasticity for reducing steel is a kind of harmful element,
Easily lead to the hot-short phenomenon of steel.Therefore sulphur should be controlled strictly, control S content is 0~0.01% in the present invention.
Als: in the present invention, there is balance in Als content and O, according to the practical control situation of field trash, control in the present invention
Als content is being no more than 0.005%.
Why the present invention controls 1 ~ 5 section of soaking pit as weak oxide atmosphere, and each section of air-fuel ratio is 1.2 ~ 1.3, soaking pit 6
~ 10 sections are strong oxidizing property atmosphere, control each section of air-fuel ratio 1.3 ~ 1.4.It is, since the steel alloy content is seldom, in furnace
Interior Mn, Si etc. are smaller to the structure and thickness effect of iron scale.So soaking pit leading portion uses weak oxide atmosphere, in bringing-up section
Generate imperfect combustion product, CO and H2Concentration increase, inhibit H2O and CO2Oxidation to slab, while avoiding depositing in furnace gas
In free oxonium ion, the iron scale based on FeO is formed in billet surface, and suitably reduce iron scale thickness.In back segment
Using strong oxidizing property atmosphere, make the O in furnace gas2, CO2And H2O carries out Strong oxdiative to FeO, and FeO is converted into Fe2O3Based on
The more loose iron scale of structure is easily removed convenient for subsequent de-scaling process.
Why the present invention uses leading portion interval cooling means (valve is opened, and a valve closes), is on the one hand to inhibit
Thickness of the iron sheet in layer-cold roller way increases；On the other hand it is to cause thermal stress uneven in order to avoid continuously cold by force, is changed with reaching
The purpose of kind plate shape.When back segment is cooling, more thicker iron scale three times can be formed in section cooling leading portion high temperature, and leading portion
The cooling thickness for advantageously reducing iron scale.
Why the present invention opens F1-F4 rack roll gap cooling water in advance, is to reduce strip steel head temperature, Jin Erzeng
Add strip steel head intensity, the probability of happening of meat is glued when reducing head impact coiling clamp roller.
Why in laminar flow, using ladder refrigerating mode, (namely the both ends temperature of steel band is low, rest part temperature by the present invention
High mode), it controls in steel coil head and tail portion 10m length, at 570 ~ 590 DEG C, rest part temperature exists cooling temperature
610-630 DEG C, lost and hit under a state to reduce super low carbon soft steel head and tail portion to improve strip steel head and tail portion intensity
It hits coiling clamp roller and causes viscous meat, reduce roll marks defect and change the original sentence to.
The present invention is compared with prior art:
First, the present invention is by shortening the reasonable of time inside furnace, low-temperature heat, furnace atmosphere optimization and the type of cooling
Matching, obtains the strip that surface iron sheet is easy to pickling.
Second, the present invention solves super low carbon soft steel head by limitation strip steel head plate speed and head and tail temperature control
The problem of hitting pinch roller under portion and tail portion mistake state, and being easy to generate viscous meat, lead to roll marks defect.
Third, the present invention plays the advantage of thin slab continuous casting and rolling abbreviated system, make full use of constant speed rolling temperature equal
The good feature of even property keeps thickness and precision high, and performance uniformity is good, i.e. fluctuation is no more than 30 μm, entire volume length direction strength fluctuation
Within 20Mpa, excellent surface quality, and it can be widely applied to finned heat exchanger with good thermally conductive, forming property
Field.
Fourth, present invention process, production process control is stablized, and overcomes thin slab continuous casting and rolling producing line quality control on the surface
The big disadvantage of difficulty solves the big technical bottleneck for restricting CSP producing line production super low carbon soft steel.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, convenient for more clearly understanding the present invention, but it
Limiting the invention.
Table 1 is various embodiments of the present invention and comparative example chemical component comparative example；
Table 2 is the main technologic parameters list of various embodiments of the present invention and comparative example；
Table 3 is various embodiments of the present invention and comparative example thickness and precision, mechanics properties testing situation.
Various embodiments of the present invention are produced according to following technique:
1) converter smelting is carried out, and controls P≤0.0015% in endpoint molten steel；
2) it is refined in LF furnace, and carries out RH application of vacuum, be cast into base in CSP conticaster later, control slab is thick
Degree is 70mm；
3) slab enters soaking pit progress soaking, controls slab tapping temperature at 1110~1140 DEG C；Time inside furnace does not surpass
Cross 35min；
Soaking pit takes " two-part " heating, it may be assumed that 1 ~ 5 section be bringing-up section, heating rate in 15 ~ 25 DEG C/min, and
Each section of air-fuel ratio is controlled in this stage 1.2 ~ 1.3；6 ~ 10 sections are soaking zone, control in this stage each section of air-fuel ratio 1.3 ~
1.4；
4) it using high-pressure water descaling to casting billet surface non-oxidation iron sheet, and controls de-scaling water inlet pressure and is not less than
200bar, outlet pressure are not less than 240bar；
5) before the rolling of each rack, first start gap cooling water；And finish rolling is carried out using seven rack units, control its end
Temperature is rolled at 880 ~ 920 DEG C；Strip steel head plate speed is controlled within 8.0m/s；
It is that 17, F3 setting value is that F1 setting value is 12, F2 setting value by adjustment F1-F4 rack roll gap cooling water timing
21.5, F4 setting values are 26；
6) section cooling is carried out, therebetween, leading portion opens the mode that a valve closes a valve using the interval type of cooling；And in steel
The length direction of band takes both ends low, the high coiling temperature mode of rest part, that is, take the lead and each 10m length of tail in, it is cold
But coiling temperature extremely is at 570 ~ 590 DEG C, and the cooling coiling temperature of rest part is at 610-630 DEG C.
7) it is batched.
Table 1 is the chemical component and its weight of Ultra-low carbon fin steel in invention Examples 1 to 10 and comparative example
Percentage, surplus are Fe and inevitable impurity.
1 various embodiments of the present invention of table and comparative example chemical component comparative example (wt%)
2 various embodiments of the present invention of table and comparative example main technologic parameters list
3 various embodiments of the present invention of table and comparative example thickness and precision, mechanics properties testing situation
As seen from Table 3, within 30 μm, coil of strip overall length strength fluctuation exists the coil of strip overall length thickness fluctuation of each embodiment
Within 20Mpa, and non-oxidation iron sheet, coiling clamp roller roll marks defect change the original sentence to plate shape and excellent surface quality.And comparative example 1 because
Scale defect is changed the original sentence to, and comparative example 2 is changed the original sentence to because of coiling clamp roller roll marks defect.
Above-described embodiment is only the best example, rather than a limitation of the embodiments of the present invention.
Claims (1)
1. a kind of CSP production technology of the fin steel of excellent surface quality, step:
1) converter smelting is carried out, and controls P≤0.0015% in endpoint molten steel；
2) it is refined in LF furnace, and carries out RH application of vacuum, be cast into base in CSP conticaster later, control slab thickness is
70mm；
3) slab enters soaking pit progress soaking, controls slab tapping temperature at 1110~1140 DEG C；Time inside furnace is no more than
35min；
Soaking pit takes " two-part " heating, it may be assumed that 1 ~ 5 section is bringing-up section, and heating rate is controlled in 15 ~ 25 DEG C/min
Each section of air-fuel ratio is 1.2 ~ 1.3 in this stage；6 ~ 10 sections are soaking zone, control in this stage each section of air-fuel ratio 1.3 ~ 1.4；
4) using high-pressure water descaling to casting billet surface non-oxidation iron sheet, and de-scaling water inlet pressure is controlled not less than 200bar, out
Mouth pressure is not less than 240bar；
5) before the rolling of each rack, first start gap cooling water；And finish rolling is carried out using seven rack units, control its finish to gauge temperature
Degree is at 880 ~ 920 DEG C；Strip steel head plate speed is controlled within 8.0m/s；
F1-F4 rack roll gap cooling water timing is adjusted, be 12, F2 setting value by F1 setting value be 17, F3 setting value is 21.5, F4
Setting value is 26；
6) section cooling is carried out, therebetween, leading portion opens the mode that a valve closes a valve using the interval type of cooling；And in steel band
Length direction takes both ends low, the high coiling temperature mode of rest part, that is, take the lead and each 10m length of tail in, be cooled to
Coiling temperature at 570 ~ 590 DEG C, the cooling coiling temperature of rest part is at 610 ~ 630 DEG C；
7) it is batched；
The fin steel of the excellent surface quality, component and weight percent content are as follows: C: be no more than 0.01%, Mn:0.18~
0.30%, Si:0~0.02%, Als: be no more than 0.005%, P:0~0.03%, S:0~0.01%, N:0.002~0.007%, remaining
For Fe and inevitable impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710455371.2A CN107245656B (en) | 2017-06-16 | 2017-06-16 | A kind of the fin steel and its CSP production technology of excellent surface quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710455371.2A CN107245656B (en) | 2017-06-16 | 2017-06-16 | A kind of the fin steel and its CSP production technology of excellent surface quality |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107245656A CN107245656A (en) | 2017-10-13 |
| CN107245656B true CN107245656B (en) | 2019-01-25 |
Family
ID=60018244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710455371.2A Active CN107245656B (en) | 2017-06-16 | 2017-06-16 | A kind of the fin steel and its CSP production technology of excellent surface quality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107245656B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109226258B (en) * | 2018-09-05 | 2020-10-09 | 湖南华菱涟源钢铁有限公司 | Method for preventing medium-high carbon hot-rolled strip steel from generating roll marks |
| CN110899329B (en) * | 2019-10-25 | 2021-08-20 | 邯郸钢铁集团有限责任公司 | Method for producing brake pad back steel based on CSP continuous casting and rolling production line |
| CN110976516B (en) * | 2019-12-30 | 2021-07-02 | 唐山市德龙钢铁有限公司 | Rolling method for eliminating roll marks on surface of hot-rolled strip steel |
| CN111604697B (en) * | 2020-05-31 | 2021-05-14 | 日照宝华新材料有限公司 | Control method for transverse folding defect of thin-specification low-carbon steel |
| CN113680818B (en) * | 2021-06-22 | 2023-06-27 | 武汉钢铁有限公司 | CSP flow-based SAE1006 thin material manufacturing method |
| CN115382913B (en) * | 2022-09-21 | 2024-09-20 | 福建鼎盛钢铁有限公司 | Method for producing hot rolled strip steel with thickness of 0.8mm based on continuous casting and rolling of totally endless sheet billet |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1135940A (en) * | 1995-03-10 | 1996-11-20 | 川崎制铁株式会社 | Steel plate for tanks and manufacture thereof |
| CN1875124A (en) * | 2003-11-05 | 2006-12-06 | 新日本制铁株式会社 | Thin steel sheet excelling in surface property, moldability and workability and process for producing the same |
| CN101144113A (en) * | 2007-08-20 | 2008-03-19 | 马鞍山钢铁股份有限公司 | Technique for producing deep-drawing cold-rolled plate based on CSP technique |
| CN101880820A (en) * | 2010-06-11 | 2010-11-10 | 武汉钢铁(集团)公司 | Steel-aluminum compound hot rolled steel with tensile strength of 310MPa and production method thereof |
| CN102179407A (en) * | 2011-03-17 | 2011-09-14 | 宁波钢铁有限公司 | Method for preparing hot rolling strip steel capable of preventing edge crack of extremely thin rolled strip steel |
| CN102575308A (en) * | 2009-07-30 | 2012-07-11 | 塔塔钢铁艾默伊登有限责任公司 | Process for producing an ultra-low-carbon steel slab, strip or sheet |
| CN103993148A (en) * | 2014-05-19 | 2014-08-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Ultra-low carbon cold-roll steel sheet and preparation method thereof |
| CN105463316A (en) * | 2014-09-09 | 2016-04-06 | 河北钢铁股份有限公司唐山分公司 | Method for producing ultra-low carbon steel on basis of flexible thin slab casting (FTSC) |
| CN106244921A (en) * | 2016-08-30 | 2016-12-21 | 武汉钢铁股份有限公司 | A kind of method producing line employing rolling in ferrite domains production mild steel at CSP |
-
2017
- 2017-06-16 CN CN201710455371.2A patent/CN107245656B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1135940A (en) * | 1995-03-10 | 1996-11-20 | 川崎制铁株式会社 | Steel plate for tanks and manufacture thereof |
| CN1875124A (en) * | 2003-11-05 | 2006-12-06 | 新日本制铁株式会社 | Thin steel sheet excelling in surface property, moldability and workability and process for producing the same |
| CN101144113A (en) * | 2007-08-20 | 2008-03-19 | 马鞍山钢铁股份有限公司 | Technique for producing deep-drawing cold-rolled plate based on CSP technique |
| CN102575308A (en) * | 2009-07-30 | 2012-07-11 | 塔塔钢铁艾默伊登有限责任公司 | Process for producing an ultra-low-carbon steel slab, strip or sheet |
| CN101880820A (en) * | 2010-06-11 | 2010-11-10 | 武汉钢铁(集团)公司 | Steel-aluminum compound hot rolled steel with tensile strength of 310MPa and production method thereof |
| CN102179407A (en) * | 2011-03-17 | 2011-09-14 | 宁波钢铁有限公司 | Method for preparing hot rolling strip steel capable of preventing edge crack of extremely thin rolled strip steel |
| CN103993148A (en) * | 2014-05-19 | 2014-08-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Ultra-low carbon cold-roll steel sheet and preparation method thereof |
| CN105463316A (en) * | 2014-09-09 | 2016-04-06 | 河北钢铁股份有限公司唐山分公司 | Method for producing ultra-low carbon steel on basis of flexible thin slab casting (FTSC) |
| CN106244921A (en) * | 2016-08-30 | 2016-12-21 | 武汉钢铁股份有限公司 | A kind of method producing line employing rolling in ferrite domains production mild steel at CSP |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107245656A (en) | 2017-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107245656B (en) | A kind of the fin steel and its CSP production technology of excellent surface quality | |
| CN104946969B (en) | Hot-rolled pickled steel plate for air conditioner compressor housings and manufacturing method thereof | |
| CN110295320B (en) | Large-wall-thickness X52MS acid-resistant pipeline steel plate produced by LF-RH refining process and manufacturing method thereof | |
| CN101671797B (en) | A high-phosphorus weathering steel cast-rolled thin strip with negative phosphorus segregation on the surface and its preparation method | |
| CN109881091A (en) | High-strength weather-resistant steel thin strip and production method thereof | |
| CN101704026A (en) | Method for controlling pitting on surface of medium steel plate | |
| CN101139687A (en) | Weather-resistant hot rolled broad steel strip and method for manufacturing same | |
| CN109881090A (en) | Low-cost weathering steel and production method thereof | |
| CN112522581B (en) | Method for producing 30CrMo hot rolled steel plate/strip by strip continuous casting | |
| CN107974615A (en) | Thickness is less than the Q460E high strength steel plates and its production method of 12mm | |
| CN109881085A (en) | Easily-welded hot-rolled thin strip Q345 based on twin-roll casting and rolling and manufacturing method thereof | |
| CN109865806A (en) | Thin strip continuous casting 345 MPa-grade weathering steel and production method thereof | |
| CN112522579B (en) | 30CrMo hot rolled steel plate/strip made of scrap steel and production method thereof | |
| CN111850396A (en) | An economical bainitic weathering steel for container and production method using CSP line | |
| WO2021052317A1 (en) | Hot-rolled steel plate/strip for sulfuric acid dew point corrosion resistance and manufacturing method therefor | |
| CN112522593B (en) | Thin 30CrMo hot rolled steel plate/strip and production method thereof | |
| CN112522599B (en) | Hot-rolled steel plate/strip for resisting sulfuric acid dew point corrosion and manufacturing method thereof | |
| CN112522585B (en) | Production method of thin hot rolled steel plate/strip for resisting sulfuric acid dew point corrosion | |
| CN107587056B (en) | A kind of chromium vanadium nitrogen-containing atmospheric corrosion-resistant steel molten steel and atmospheric corrosion-resistant steel and production method thereof | |
| CN112522637B (en) | B-containing thin 30CrMo hot rolled steel plate/strip and manufacturing method thereof | |
| CN115261736B (en) | Corrosion-resistant wire rod based on microalloying and production process thereof | |
| CN112522589B (en) | B-containing hot rolled steel plate/strip for resisting sulfuric acid dew point corrosion and manufacturing method thereof | |
| CN118441220A (en) | Smelting method of pipeline pipe round tube blank for low-carbon large-section hot rolling seamless | |
| CN107587047B (en) | Nitrogen-containing atmospheric corrosion-resistant section steel molten steel and atmospheric corrosion-resistant section steel and production method thereof | |
| CN107587060B (en) | A kind of atmospheric corrosion-resistant steel molten steel and chromium-vanadium-containing atmospheric corrosion-resistant steel and production method thereof |
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 |