CN107723593A - Based on the method that anti-natural ageing steel is produced completely without head sheet continuous casting and rolling - Google Patents
Based on the method that anti-natural ageing steel is produced completely without head sheet continuous casting and rolling Download PDFInfo
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- CN107723593A CN107723593A CN201710916744.1A CN201710916744A CN107723593A CN 107723593 A CN107723593 A CN 107723593A CN 201710916744 A CN201710916744 A CN 201710916744A CN 107723593 A CN107723593 A CN 107723593A
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- 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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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- 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
- C21D8/0226—Hot rolling
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- 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
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- 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
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- 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
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- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- Heat Treatment Of Sheet Steel (AREA)
Abstract
The present invention provides a kind of method based on completely without head sheet continuous casting and rolling production anti-natural ageing steel, including：Raw material are selected, wherein, raw material include by mass percentage：0.008~0.02% C, 0.02~0.10% Si, 0.08~0.2% Mn ,≤0.015% P ,≤0.010% S, 0.01~0.018% Ti ,≤0.006% N, remaining is ferro element；Raw material are carried out to converter smelting, LF stoves and RH stoves successively to smelt；Hot-strip of the molten steel to be formed by ESP producing lines generation different-thickness will be smelted from RH stoves；Wherein, the temperature of roughing entrance is not less than 950 DEG C, and 1120~1180 DEG C of the temperature of sensing heating outlet, the temperature of finish rolling outlet is not less than 800 DEG C.Using the present invention, the problem of existing mild steel produces natrual ageing can solve the problem that.
Description
Technical field
The present invention relates to steel technical field, more specifically, is related to a kind of be based on completely without the production of head sheet continuous casting and rolling
The method of anti-natural ageing steel.
Background technology
With persistently dropping for steel market, steel is constantly in meagre profit or without sharp state, forces steel producer to have to
Jiang Benzhi roads are inquired into, and the country further strengthens the attention degree of environmental protection at present, environmental requirement is again unprecedented strict, therefore discussion
Originally the process for producing steel and iron of environmental protection has become the road of very necessary existence to drop again.
Sheet continuous casting and rolling technique conticaster pulling rate is high and stably, and induction heater is before finishing mill, production without a head in addition
Do not need threading, can stable rolling production thin gauge strip steel, elongated thickness is uniform, stable performance.Can be realized from specification " with
Hot Dai Leng ", but many industries such as electrically, automobile, fire-fighting, many industries of tubbing, higher, and cold forming is required to forming property
Product is mainly mild steel series, inevitable to occur natrual ageing phenomenon because the presence of interstitial atom, product just output
Shi Xingneng can meet customer need, but from output to transporting in client's hand, middle elapsed-time standards is longer, plus arrival client's hand
In after, and non-immediate use, over time, properties of product run down, cracking phenomena during so as to cause shaping, to visitor
Family and production producer bring larger loss.
To solve the above problems, the present invention proposes a kind of be based on completely without head sheet continuous casting and rolling production anti-natural ageing steel
Method.
The content of the invention
In view of the above problems, when being based on producing anti-natural completely without head sheet continuous casting and rolling it is an object of the invention to provide one kind
The method for imitating steel, to solve the problems, such as that the existing steel produced produces natrual ageing.
The present invention provides a kind of method based on completely without head sheet continuous casting and rolling production anti-natural ageing steel, including：
Raw material are selected, wherein, raw material include by mass percentage：0.008~0.02% C, 0.02~0.10%
Si, 0.08~0.2% Mn ,≤0.015% P ,≤0.010% S, 0.01~0.018% Ti ,≤0.006%
N, remaining is ferro element；
Raw material are carried out to converter smelting, LF stoves and RH stoves successively to smelt；
Hot-strip of the molten steel to be formed by ESP producing lines generation different-thickness will be smelted from RH stoves, wherein, produced in ESP
In line, molten steel cuts by conticaster, roughing mill, pendulum successively, pushes away useless, rotating hub cuts, induction heater, finishing mill, section cooling；Its
In,
The temperature of roughing entrance is not less than 950 DEG C, 1120~1180 DEG C of the temperature of sensing heating outlet, the temperature of finish rolling outlet
Degree is not less than 800 DEG C.
Furthermore it is preferred that scheme be that hot-strip is delivered to pickling machine and carries out pickling, pickling is laggard after section cooling
Row scale breading, smooth, straightening, and straightening overall reduction are 1.0~3.0%, then batch storage.
Furthermore it is preferred that scheme be that in ESP producing lines, the slab thickness that conticaster is produced is 90mm~110mm.
Furthermore it is preferred that scheme be that the thickness of the hot-strip of generation is 1.0mm~2.5mm.
Furthermore it is preferred that scheme be yield strength >=253MPa of the hot-strip of production, tensile strength >=352MPa,
Elongation percentage 36%.
It is provided by the invention to be based on producing anti-natural ageing completely without head sheet continuous casting and rolling it was found from technical scheme above
The method of steel, Thin Specs cold forming series anti-natural ageing steel is produced using EPS production technologies, when can greatly prolong generation nature
The time of effect, ensure the performance of steel.
In order to realize above-mentioned and related purpose, one or more aspects of the invention include will be explained in below and
The feature particularly pointed out in claim.Some illustrative aspects of the present invention are described in detail in following explanation and accompanying drawing.
However, some modes in the various modes of the principle that the present invention only can be used of these aspect instructions.It is in addition, of the invention
It is intended to include all these aspects and their equivalent.
Brief description of the drawings
By reference to the explanation and the content of claims below in conjunction with accompanying drawing, and with to the present invention more comprehensively
Understand, other purposes and result of the invention will be more apparent and should be readily appreciated that.In the accompanying drawings：
Fig. 1 is based on the method stream that anti-natural ageing steel is produced completely without head sheet continuous casting and rolling according to the embodiment of the present invention
Journey schematic diagram.
Identical label indicates similar or corresponding feature or function in all of the figs.
Embodiment
In the following description, for purposes of illustration, in order to provide the comprehensive understanding to one or more embodiments, explain
Many details are stated.It may be evident, however, that these embodiments can also be realized in the case of these no details.
Refer to strip process without a head completely without head CSP (Endless Strip Production), at 7 points
The completely continuous manufacturing of hot rolled coil on from molten steel to coiling machine is realized in clock, realizes truly continuous casting and rolling.The technology has
There is Molten Steel Cleanliness high, casting blank solidification speed is fast, as-cast structure is uniform, Segregation of Chemical Composition is small, and rolling time is short, passage pressure
Amount is big, and the features such as finished product even tissue, and the technique does not need threading, and the elongated thickness of hot rolled coil is uniform, and dimensional accuracy is high.
Wherein, it is that the newly-built CSP of new generation of AVM hereinafter enlightening produces completely without head CSP producing line
Line, a whole piece steel band can be produced by once being cast due to it, and centre produces without any cutting head cutting tail, thus with Total continuity strip
The advantages of, wall scroll continuous casting line has outstanding production capacity, large-scale production greatly with wide flat steel and quality strip steel, from molten steel to heat
The features such as conversion cost of rolling volume is low, production-line technique arrangement is the compactest.
The specific embodiment of the present invention is described in detail below with reference to accompanying drawing.
It is provided by the invention based on the method that anti-natural ageing steel is produced completely without head sheet continuous casting and rolling, Fig. 1 in order to illustrate
Show according to embodiments of the present invention based on the method flow that anti-natural ageing steel is produced completely without head sheet continuous casting and rolling.
It is as shown in figure 1, provided by the invention based on the method bag that anti-natural ageing steel is produced completely without head sheet continuous casting and rolling
Include：
S110：Raw material are selected, wherein, raw material include by mass percentage：0.008~0.02% C, 0.02~
0.10% Si, 0.08~0.2% Mn ,≤0.015% P ,≤0.010% S, 0.01~0.018% Ti ,≤
0.006% N, remaining is ferro element；
S120：Raw material are carried out to converter smelting, LF stoves and RH stoves successively to smelt；
S130：Hot-strip of the molten steel to be formed by ESP producing lines generation different-thickness will be smelted from RH stoves, wherein,
In ESP producing lines, molten steel cuts by conticaster, roughing mill, pendulum successively, pushes away useless, rotating hub cuts, induction heater, finishing mill, laminar flow are cold
But；Wherein,
The temperature of roughing entrance is not less than 950 DEG C, 1120~1180 DEG C of the temperature of sensing heating outlet, the temperature of finish rolling outlet
Degree is not less than 800 DEG C.
Above-mentioned steps are the specific method using ESP Process Production anti-natural ageing steel, in the step S110 of the present invention,
In the raw material selection of generation anti-natural ageing steel, C mass percent is 0.008~0.020%, wherein, C element is to protect
The main element of the strength of materials, hardness and wearability is demonstrate,proved, rational composition design can ensure the performance of material simultaneously
Production cost is reduced to greatest extent, but C content is crossed and is at most easy to cause natrual ageing, it is therefore necessary to which control is in a rational scope
Within, it is too low also to increase cost.C content control in the present invention is 0.008~0.020%.
Ratios of the Si in raw material is that 0.02~0.10%, Si has preferable deoxidation effect, and Si is in steelmaking process
Added as reducing agent and deoxidier, and Si can significantly improve the elastic limit of steel, can effectively suppress the precipitation of carbide.
Si contents control in the present invention is 0.02~0.10%.
Ratio shared in raw material Mn is that 0.08~0.2%, Mn maximum effect is to improve the quenching degree of steel, simultaneously
And important solution strengthening element.Manganese is carbide former, can also be existed with solid solution condition, also has refinement pearlite
The effect of tissue, be advantageous to bainite and formed.But improved simultaneously with the raising hot rolling austenitic area resistance of deformation of Mn contents, separately
Outer Mn contents have the tendency of coarsened grain and increase temper brittleness when higher, difficulty is brought to processing, too high to improve martensite
Quenching degree, it is unfavorable for elongation percentage, therefore Mn contents control in the present invention is 0.08~0.2%.
Ratio shared in raw material Ti is that 0.01~0.018%, Ti is strong carbonitride-forming elements, at high temperature
N element is fixed, so as to reduce the precipitation of interstitial atom, but Ti is strong precipitation strength element simultaneously, too high to cause strip
Intensity raises, while is easy to produce side during hot rolling and splits, while raises cost, in the present invention control of Ti contents 0.010~
0.018%.
Ratio shared in raw material N is≤0.006%, and nitrogen is interstitial atom, to produce the main of natrual ageing
One of reason, it is too high that interstitial atom amount can be caused excessive, it is therefore necessary to strict control, but easily increase in steel-making and continuous casting link
Nitrogen, thus control difficulty it is larger, can only be limited in it is a certain within the scope of, therefore in the present invention N control≤0.005%.
, wherein it is desired to explanation, it is characteristic of the invention that being resisted using the production completely without head bar strip continuous casting and rolling flow path
Natrual ageing steel, composition design are taken into full account needs that are cost-effective, improving comprehensive mechanical property, contained using suitable Ti, N
Amount, controlled by the rolling mill practice completely without head sheet blank continuous casting, produce 1.0-2.5mm Thin Specs cold forming series steel, met
The performance requirements such as cold forming series of intensity, elongation percentage, the time for producing natrual ageing can be greatly prolonged, ensure that client uses
Performance.
In the step s 120, converter is carried out according to the composition of above-mentioned (step S110), LF stoves are smelted.That is, molten iron
Pass through LF stoves again after converter smelting to refine to obtain the molten steel of required composition.Wherein, pneumatic steelmaking (converter
Steelmaking it is) using molten iron, steel scrap, ferroalloy as primary raw material, not by external energy, by the physical thermal of iron liquid in itself
Chemical reaction produces heat and steelmaking process is completed in converter between iron liquid component.Converter is mainly for the production of carbon steel, alloy
Steel and copper and mickel are smelted.
LF stoves (ladle furnace) are ladle refining furnace, are external refining equipments main in steel production.LF stoves one
As refer to refining furnace in steel industry, actual is exactly a kind of special shape of electric arc furnaces.
In step s 130, in ESP producing lines, the temperature that strand enters roughing entrance cannot be below 950 DEG C, and middle base exists
Initially entered before into mm finishing mill unit in induction heater, the temperature 1120 of IH (sensing heating) outlet temperatures sensing heating outlet
~1180 DEG C, out enter mm finishing mill unit from induction heater, and the temperature of finish rolling outlet is not less than 800 DEG C.
, wherein it is desired to explanation, IH are sensing heating outlet temperature, induction heater is located at after rotating hub cuts, finish rolling
Position before machine, the effect of sensing heating is heating strip, ensures final rolling temperature, it may also be said to is the temperature of base among regulation
Degree, depending on IH temperature is according to strip finish rolling requirement and consideration to strip steel surface quality, final rolling temperature can be caused not less than a certain temperature
Close, the energy is then wasted higher than a certain temperature.
Wherein, in ESP producing lines, the molten steel for smelting out from LF stoves enters conticaster, and the strand come out from conticaster is straight
Tap into and middle base (wherein, strand enters the inlet temperature of group milling train group not less than 950 DEG C), Ran Houjing is made into 3 frame roughing mills
Cross rocking shears, strand head wedge-shaped segment be segmented and cut away, then strand enter piler (effect of piler be when after
, can be offline at this piler when face equipment breaks down).Directly by the way that then middle base is through rotary hub type during normal rolling
Flying shear crop end, subsequently into 1120~1180 DEG C of the temperature of sensing heating outlet, mm finishing mill unit is subsequently entered, from mm finishing mill unit
Out generate hot-strip.
In an embodiment of the present invention, raw material can be selected containing Ti and carry out experiment comparison without Ti, by testing
Go out：For yield strength containing Ti higher than more than Ti yield strengths 40MPa is free of, elongation percentage is high by about 4.5%；Surrendered after acid is flat without Ti
12MPa is raised than raw material, is surrendered containing Ti and declines 57MPa；Relative to sour flat sample, improved after natrual ageing without Ti surrenders
24MPa, elongation percentage reduce by 4%；Surrendered containing Ti and improve 5MPa, elongation percentage reduces by 0.1%, and change is smaller；Relative to sour flat sample,
Water-bath sample yield strength raises 45MPa, and elongation percentage reduces by 6.2%；Rise 11Mpa is surrendered containing Ti, elongation percentage reduces by 1.4%.
The reason for forming above-mentioned result：Be present more cross break in material surface, found by transferring stress strain curve, hot rolling
Yield point elongation under state be present.Show KESHI gas mass still be present under hot rolling material, in the natrual ageing after smooth and water
Bath is handled, and is not in still yield point elongation, is shown that product is mainly TiN in the hot rolling, or a small amount of Ti (CN), because of N
Atom content is less, therefore most N atoms and a small amount of C atoms are fixed by Ti in the process, a remainder carbon part
Cementite is formed to separate out, remainder is present in matrix gap with free state, the C atoms of these free states with it is remaining few
The N atoms of amount, it is less because measuring, it is not enough to cause timeliness in the short time；Simultaneously because carbon atom radius is larger, because of carbon after peracid is flat
Atoms permeating is slower, therefore under natrual ageing state and water-bath state, influence of time effect unobvious.
According to the method for above-mentioned generation anti-natural ageing steel, the present invention is further described according to examples below.
Embodiment 1
Raw material are selected, wherein raw material include by mass percentage：0.01513% C, 0.3219% Si,
0.09422% Mn, 0.01155% P, 0.00172% S, 0.00161% Ti, 0.006% N, 0.00168%
Cu, 0.0094% Ni, 0.02424% Cr, 0.00356% Mo, remaining is ferro element and its impurity；
Raw material are carried out to converter, LF stoves, the smelting of RH stoves successively；
Continuous casting is produced with 5.4m/min speed perseverance pulling rate, and the hot-strip of 1.8mm thickness is generated by ESP producing lines, its
Middle 970 DEG C of roughing inlet temperature, 1150 DEG C of sensing heating heater outlet temperature, 855 DEG C of exit temperature at finishing；
Hot-strip is delivered to pickling machine and carries out pickling after laminar flow is cold, and scale breading, smooth, straightening are carried out after pickling, and
Straightening overall reduction is 1.0~3.0%, then batches storage.
The anti-natural ageing steel mechanical property of generation is：Yield strength is 310MPa, tensile strength 350MPa, elongation
41%.
Embodiment 2
Raw material are selected, wherein raw material include by mass percentage：0.01179% C, 0.03285% Si,
0.10031% Mn, 0.01208% P, 0.00118% S, 0.01382% Ti, 0.00334% N, 0.0113%
Cu, 0.0086% Ni, 0.02101% Cr, 0.00248% Mo, remaining is ferro element and its impurity；
Raw material are carried out to converter, LF stoves, the smelting of RH stoves successively；
Continuous casting is produced with 5.4m/min speed perseverance pulling rate, and the hot-strip of 1.8mm thickness is generated by ESP producing lines, its
Middle 970 DEG C of roughing inlet temperature, 1150 DEG C of sensing heating heater outlet temperature, 860 DEG C of exit temperature at finishing；
Hot-strip is delivered to pickling machine and carries out pickling after laminar flow is cold, and scale breading, smooth, straightening are carried out after pickling, and
Straightening overall reduction is 1.0~3.0%, then batches storage.
The anti-natural ageing steel mechanical property of generation is：Yield strength is 253MPa, tensile strength 354MPa, elongation
40.5%.
Embodiment 3
Raw material are selected, wherein raw material include by mass percentage：0.0176% C, 0.0317% Si,
0.08939% Mn, 0.01155% P, 0.00015% S, 0.01543% Ti, 0.00432% N, 0.00639%
Cu, 0.0071% Ni, 0.01834% Cr, 0.00277% Mo, remaining is ferro element and its impurity；
Raw material are carried out to converter, LF stoves, the smelting of RH stoves successively；
Continuous casting is produced with 5.4m/min speed perseverance pulling rate, and the hot-strip of 1.5mm thickness is generated by ESP producing lines, its
Middle 980 DEG C of roughing inlet temperature, 1160 DEG C of sensing heating heater outlet temperature, 870 DEG C of exit temperature at finishing；
Hot-strip is delivered to pickling machine and carries out pickling after laminar flow is cold, and scale breading, smooth, straightening are carried out after pickling, and
Straightening overall reduction is 1.0~3.0%, then batches storage.
The anti-natural ageing steel mechanical property of generation is：Yield strength is 275MPa, tensile strength 368MPa, elongation
38%.
Embodiment 4
Raw material are selected, wherein raw material include by mass percentage：0.0164% C, 0.0317% Si,
0.09478% Mn, 0.01105% P, 0.00085% S, 0.01264% Ti, 0.00338% N, 0.01631%
Cu, 0.0097% Ni, 0.02643% Cr, 0.00243% Mo, remaining is ferro element and its impurity；
Raw material are carried out to converter, LF stoves, the smelting of RH stoves successively；
Continuous casting is produced with 5.4m/min speed perseverance pulling rate, and the hot-strip of 1.8mm thickness is generated by ESP producing lines, its
Middle 950 DEG C of roughing inlet temperature, 1140 DEG C of sensing heating heater outlet temperature, 860 DEG C of exit temperature at finishing；
Hot-strip is delivered to pickling machine and carries out pickling after laminar flow is cold, and scale breading, smooth, straightening are carried out after pickling, and
Straightening overall reduction is 1.0~3.0%, then batches storage.
The anti-natural ageing steel mechanical property of generation is：Yield strength is 291MPa, tensile strength 352MPa, elongation
45%.
Embodiment 5
Raw material are selected, wherein raw material include by mass percentage：0.01379% C, 0.03472% Si,
0.09801% Mn, 0.01328% P, 0.00131% S, 0.01392% Ti, 0.00507% N, 0.02176%
Cu, 0.0101% Ni, 0.02778% Cr, 0.00404% Mo, remaining is ferro element and its impurity；
Raw material are carried out to converter, LF stoves, the smelting of RH stoves successively；
Continuous casting is produced with 5.5m/min speed perseverance pulling rate, and the hot-strip of 1.5mm thickness is generated by ESP producing lines, its
Middle 980 DEG C of roughing inlet temperature, 1160 DEG C of sensing heating heater outlet temperature, 870 DEG C of exit temperature at finishing；
Hot-strip is delivered to pickling machine and carries out pickling after laminar flow is cold, and scale breading, smooth, straightening are carried out after pickling, and
Straightening overall reduction is 1.0~3.0%, then batches storage.
The generation anti-natural ageing steel mechanical property of generation is：Yield strength is 249MPa, tensile strength 372MPa, is stretched
Long rate 38.5%.
Embodiment 6
Raw material are selected, wherein raw material include by mass percentage：0.01225% C, 0.03162% Si,
0.09801% Mn, 0.01328% P, 0.00196% S, 0.0153% Ti, 0.00668% N, 0.01909%
Cu, 0.0095% Ni, 0.0229% Cr, 0.00248% Mo, remaining is ferro element and its impurity；
Raw material are carried out to converter, LF stoves, the smelting of RH stoves successively；
Continuous casting is produced with 5.4m/min speed perseverance pulling rate, and the hot-strip of 1.8mm thickness is generated by ESP producing lines, its
Middle 980 DEG C of roughing inlet temperature, 1160 DEG C of sensing heating heater outlet temperature, 870 DEG C of exit temperature at finishing；
Hot-strip is delivered to pickling machine and carries out pickling after laminar flow is cold, and scale breading, smooth, straightening are carried out after pickling, and
Straightening overall reduction is 1.0~3.0%, then batches storage.
The anti-natural ageing steel mechanical property of generation is：Yield strength is 295MPa, tensile strength 356MPa, elongation
40%.
Provided by the invention be based on completely without the anti-nature of head sheet continuous casting and rolling production can be seen that by above-mentioned embodiment
The method of aged steel, Thin Specs cold forming series anti-natural ageing steel is produced using EPS production technologies, can greatly prolong and be produced from
The time of right timeliness, ensure the performance of steel.
Describe above with reference to accompanying drawing and be based on according to proposed by the present invention completely without head sheet continuous casting and rolling in an illustrative manner
The method for producing anti-natural ageing steel.It will be understood by those skilled in the art, however, that for the invention described above proposed based on
Completely without the method for head sheet continuous casting and rolling production anti-natural ageing steel, can also be made on the basis of present invention is not departed from
Various improvement.Therefore, protection scope of the present invention should be determined by the content of appended claims.
Claims (5)
- It is 1. a kind of based on the method that anti-natural ageing steel is produced completely without head sheet continuous casting and rolling, it is characterised in that including：Raw material are selected, wherein, the raw material include by mass percentage：0.008~0.02% C, 0.02~0.10% Si, 0.08~0.2% Mn ,≤0.015% P ,≤0.010% S, 0.01~0.018% Ti ,≤0.006% N, remaining is ferro element；The raw material are carried out to converter smelting, LF stoves and RH stoves successively to smelt；Hot-strip of the molten steel to be formed by ESP producing lines generation different-thickness will be smelted from the RH stoves, wherein, described In ESP producing lines, the molten steel cuts by conticaster, roughing mill, pendulum successively, pushes away useless, rotating hub cuts, induction heater, finishing mill, layer Stream cooling；Wherein,The temperature of roughing entrance is not less than 950 DEG C, and 1120~1180 DEG C of the temperature of sensing heating outlet, the temperature of finish rolling outlet is not Less than 800 DEG C.
- 2. existed as claimed in claim 1 based on the method that anti-natural ageing steel is produced completely without head sheet continuous casting and rolling, its feature In,The hot-strip is delivered to pickling machine and carries out pickling after section cooling, and scale breading, smooth, straightening are carried out after pickling, and And straightening overall reduction is 1.0~3.0%, then batches storage.
- 3. existed as claimed in claim 1 based on the method that anti-natural ageing steel is produced completely without head sheet continuous casting and rolling, its feature In,In the ESP producing lines, the slab thickness of the conticaster production is 90mm~110mm.
- 4. existed as claimed in claim 1 based on the method that anti-natural ageing steel is produced completely without head sheet continuous casting and rolling, its feature In,The thickness of the hot-strip of generation is 1.0mm~2.5mm.
- 5. existed as claimed in claim 1 based on the method that anti-natural ageing steel is produced completely without head sheet continuous casting and rolling, its feature In,Yield strength >=253MPa of the hot-strip of production, tensile strength >=352MPa, elongation percentage 36%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN109628826A (en) * | 2018-11-21 | 2019-04-16 | 唐山钢铁集团有限责任公司 | A kind of agricultural machinery low-carbon abrasion resistant steel band and its production method |
| CN115449718A (en) * | 2022-08-19 | 2022-12-09 | 马鞍山钢铁股份有限公司 | Ageing-resistant pickled plate and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109055867A (en) * | 2018-08-30 | 2018-12-21 | 日照钢铁控股集团有限公司 | A method of producing tensile strength 540MPa high reaming heat zinc coating plate |
| CN109055867B (en) * | 2018-08-30 | 2021-06-29 | 日照钢铁控股集团有限公司 | Method for producing high-hole-expansion hot-dip galvanized plate with tensile strength of 540MPa |
| CN109628826A (en) * | 2018-11-21 | 2019-04-16 | 唐山钢铁集团有限责任公司 | A kind of agricultural machinery low-carbon abrasion resistant steel band and its production method |
| CN115449718A (en) * | 2022-08-19 | 2022-12-09 | 马鞍山钢铁股份有限公司 | Ageing-resistant pickled plate and production method thereof |
| CN115449718B (en) * | 2022-08-19 | 2024-01-16 | 马鞍山钢铁股份有限公司 | Time-resistant pickled plate and production method thereof |
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Application publication date: 20180223 |