CN105525214A - Cold rolling hard tinning steel plate and production method thereof - Google Patents
Cold rolling hard tinning steel plate and production method thereof Download PDFInfo
- Publication number
- CN105525214A CN105525214A CN201410515355.4A CN201410515355A CN105525214A CN 105525214 A CN105525214 A CN 105525214A CN 201410515355 A CN201410515355 A CN 201410515355A CN 105525214 A CN105525214 A CN 105525214A
- Authority
- CN
- China
- Prior art keywords
- cold rolling
- rolling
- steel
- temperature
- tin plate
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title abstract description 49
- 239000010959 steel Substances 0.000 title abstract description 49
- 238000005097 cold rolling Methods 0.000 title abstract description 47
- 238000004519 manufacturing process Methods 0.000 title abstract description 24
- 238000005096 rolling process Methods 0.000 abstract description 34
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 10
- 239000012535 impurity Substances 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 235000013361 beverage Nutrition 0.000 abstract description 2
- 235000013305 food Nutrition 0.000 abstract description 2
- 238000004806 packaging method and process Methods 0.000 abstract description 2
- 238000003889 chemical engineering Methods 0.000 abstract 1
- 238000000137 annealing Methods 0.000 description 31
- 239000000463 material Substances 0.000 description 26
- 238000000034 method Methods 0.000 description 26
- 230000000052 comparative effect Effects 0.000 description 16
- 239000005028 tinplate Substances 0.000 description 16
- 229910052799 carbon Inorganic materials 0.000 description 15
- 230000008569 process Effects 0.000 description 15
- 239000011572 manganese Substances 0.000 description 12
- 238000001816 cooling Methods 0.000 description 11
- 238000005098 hot rolling Methods 0.000 description 11
- 238000005728 strengthening Methods 0.000 description 10
- 230000032683 aging Effects 0.000 description 9
- 238000009749 continuous casting Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 229910052748 manganese Inorganic materials 0.000 description 7
- 238000001556 precipitation Methods 0.000 description 7
- 238000002791 soaking Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 229910001567 cementite Inorganic materials 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000001953 recrystallisation Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- 239000007769 metal material Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910000576 Laminated steel Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000007550 Rockwell hardness test Methods 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention relates to a cold rolling hard tinning steel plate and a production method thereof. The technical problems that when a sour rolling unit is used for production, an existing cold rolling hard tinning steel plate is low in rolling speed, high in failure rate and low in production efficiency are mainly solved. The cold rolling hard tinning steel plate comprises, by weight percentage, 0.051%-0.079% of C, not larger than 0.1% of Si, 0.20%-0.40% of Mn, not larger than 0.020% of P, not larger than 0.020% of S, 0.010%-0.060% of Alt, not larger than 0.0060% of N and the balance iron and inevitable impurities. The cold rolling hard tinning steel plate and the production method are mainly used for the packaging fields of food tanks, beverage cans, aerial fog tanks, chemical engineering tanks and the like.
Description
Technical field
The present invention relates to a kind of cold-rolled tin plate and production method thereof, particularly the cold rolling hard tin plate of one and production method thereof.
Background technology
Tin plate is commonly called as " tinplate ", refer to that two sides is coated with Low carbon cold rolling steel sheet or the steel band of commercially pure tin, the solidity to corrosion of the intensity of steel and formability and tin, weldability and appearance attractive in appearance are incorporated among a kind of material by it, there is corrosion-resistant, nontoxic, high strength and good ductility, be widely used in the packaging fields such as food cans, beverages can, inhalator jar, chemical tank.
The zinc-plated hardness of current raising mainly contains two kinds of methods: a kind of content improving C, Mn component element, the effect of solution strengthening is played by this dvielement, the patent document of Chinese patent application 200910063099.9 discloses a kind of hard tinned plate and the production technique that are applicable to punch process, raw sheet with the addition of 0.08-0.13%C and 0.47-0.65%Mn, and hardness HR30T can reach 60-70.Annealing way is bell furnace, and this design hardness fluctuations scope HR30T is 65 ± 5, the requirement that the delivery requirements that can not meet user far away develops to high speed with tank industry processed.In addition, can calculate that the resistance to deformation of cold rolling supplied materials is 280-340MPa by 0.08-0.13%C and 0.47-0.65%Mn, being out of shape after strain drag through five frame tandem rolling 80-90% is 900-1100MPa, roll speed is up to 800-900m/min, exceed this speed rolling and produce vibration, plate shape cannot be ensured, even broken belt, can only maintain production by low speed, production efficiency is low.Another kind method is by carrying out reroll after annealing, the object improving hardness is reached by work hardening, Chinese patent application 201010204967.3 discloses a kind of steel for high-hardness tin plating primitive plate and manufacture method thereof, Composition Design adopts low-carbon (LC), low manganese, after continuous annealing, need the secondary cold-rolling carrying out being out of shape 15-18%, hardness improves obviously, but unit elongation can be caused simultaneously sharply to decline, affect the punching performance of material.This secondary cold-rolling mode of production, needs to be equipped with secondary cold-rolling unit, adds production cost.
It is high to there is the constituent content such as carbon, manganese in the existing published technical scheme about hard tinned plate material and manufacture method, plastic deformation resistance is too increased while improve the intensity of material itself, add rolling difficulty, roll speed is restricted, the problem that Rolling failure rate is high.
Summary of the invention
The object of this invention is to provide a kind of cold rolling hard tin plate and production method thereof, mainly solve the existing cold rolling hard tin plate technical problem that roll speed is low when sour rolling mill is produced, failure rate is high, production efficiency is low.
The technical solution used in the present invention is:
A kind of cold rolling hard tin plate, chemical component weight per-cent: C:0.051% ~ 0.079%, Si≤0.1%, Mn:0.20% ~ 0.40%, P≤0.020%, S≤0.020%, Alt:0.010% ~ 0.060%, N≤0.0060%, surplus is Fe and inevitable impurity element.
The reason that the chemical composition of cold rolling hard tin plate of the present invention is limited in above-mentioned scope is as follows:
Carbon: C exists with the form of interstitial atom and cementite in steel, has stronger strengthening effect, in order to strengthening material in steel, need to retain a certain amount of carbon in the material to improve intensity, but this element is too high, the plastic deformation resistance of material increases, and rolling load raises.In addition, carbon is in peritectoid district and easily produces slab crackle, and the carbon 0.08 ~ 0.13% of such as CN200910063099.9 is in peritectoid district, and continuous casting produces difficulty.But carbon is too low, improve materials A r
3temperature, if material is thin easier at two-phase region rolling generation mixed grain structure.Therefore, C content range set of the present invention is 0.051% ~ 0.079%;
Silicon: Si is the element that steel strength is improved, but Si easily produces iron scale when hot rolling, be difficult to eliminate at hot rolling high pressure water, thus remain in iron scale that hot-rolled steel sheet takes on a red color, what this iron scale was deep be engaged in hot-rolled steel sheet is difficult to pickling washes off, thus produce cold rolling rear surface of steel plate bad, affect outward appearance, even cause stamping cracking.Therefore, in the present invention, the content of Si is more low better, and setting silicone content of the present invention is below 0.1%;
Manganese: Mn with C is the same is the strengthening element of steel, in steel, suitably add the raising that Mn is conducive to intensity, adds a small amount of Mn simultaneously and can combine with S and generate MnS, reduce surface hot-short, avoid surface quality problems, but add the plastic deformation resistance that too much can improve material, increase rolling load.Technical solution of the present invention setting Mn content range is 0.20% ~ 0.40%;
P and s: sulphur forms sulfide inclusion in steel, makes its ductility and toughness reduce.During steel rolling, because MnS is mingled with along with rolling direction extends, the anisotropy of steel is increased the weight of, time serious, causes Laminated steel.Phosphorus can improve the intensity of material, but can increase the cold shortness of steel.Two kinds of elements are more low better, but consider actual process controllability, technical solution of the present invention setting P≤0.020%, S≤0.020%;
Aluminium: aluminium adds as reductor when making steel, when in steel, aluminium content is less than 0.01%, the deoxidation effect of material is bad, can produce a large amount of Al in steel
2o
3be mingled with; Steel adds the many precipitations that can promote nitrogen of excessive aluminium, and material reinforcement is unfavorable.Therefore, Al content range of the present invention is set as 0.010% ~ 0.060%.
Nitrogen: nitrogen is gap strengthening element, nitrogen raises intensity and can rise, but the plastic deformation resistance of material increases thereupon simultaneously; The present invention averages out between intensity and plastic deformation resistance, and N content of the present invention is set as N≤0.0060%.
A production method for cold rolling hard tin plate, the method comprises:
Molten steel carries out continuous casting and obtains continuous casting steel billet after Fruit storage, the mass percent of wherein said molten steel composition is: C:0.051% ~ 0.079%, Si≤0.1%, Mn:0.20% ~ 0.40%, P≤0.020%, S≤0.020%, Alt:0.010% ~ 0.060%, N≤0.0060%, surplus is Fe and inevitable impurity element;
Continuous casting steel billet carries out hot rolling after process furnace is heated to 1150 DEG C ~ 1270 DEG C, and described hot rolling is two-part rolling technology, and roughing is 5 passage tandem rollings, and finish rolling is 7 passage tandem rollings, and finish rolling end temp is 840 DEG C ~ 870 DEG C; After finish rolling, steel plate thickness is 2 ~ 3.5mm, and section cooling adopts leading portion cooling, and coiling temperature is 500 DEG C ~ 540 DEG C and batches acquisition coils of hot-rolled steel;
Coils of hot-rolled steel again after uncoiling through pickling, cold rolling, vertical continuous annealing furnace is annealed, smooth, eleetrotinplate, batching and obtaining thickness is 0.18mm ~ 0.30mm finished product, described cold rolling draft is 85% ~ 92%, the hard state band steel that rolls after cold rolling is 575 DEG C ~ 590 DEG C in the soaking zone temperature that vertical continuous annealing furnace is annealed, be 60s ~ 95s with steel at the annealing time of soaking zone, band steel is 330 DEG C ~ 350 DEG C in rapid cooling terminal temperature, overaging 1 segment endpoint temperature is 270 DEG C ~ 290 DEG C, overaging 2 segment endpoint temperature is 220 DEG C ~ 240 DEG C, overaging 3 segment endpoint temperature is 190 DEG C ~ 210 DEG C, smoothly extend to rate 1.0% ~ 2.0%.
The reason of the production technique that the present invention takes is as follows:
1, the setting of continuous casting steel billet Heating temperature
Slab heating temperature on the dissolving of AlN, to separate out impact larger, when Heating temperature is less than 1150 DEG C, AlN does not dissolve substantially, therefore temperature is added more preferably greater than 1150 DEG C, in material, C, atom N are dissolved more abundant, the strengthening effect of C, N gap is played, but the too high material surface of Heating temperature easily occurs defect.Therefore the present invention sets continuous casting steel billet Heating temperature is 1150 DEG C ~ 1250 DEG C.
2, finish rolling end temp setting
When carrying out hot rolling, material is complete austenite recrystallization rolling, and cause mixed crystal in order to avoid material enters two-phase region rolling, cannot eliminate again in cold rolling process, finishing temperature is higher than Ar
3transformation temperature, through measuring static transformation point temperature at 840 DEG C, dynamic temperature declines 10 DEG C ~ 15 DEG C.Therefore, consider, finish rolling end temp of the present invention is set as 840 DEG C ~ 870 DEG C.
3, section cooling mode and hot-rolling coiling temperature setting
If hot-rolling coiling temperature is greater than 580 DEG C, AlN precipitate is more, and the strengthening effect of N is deteriorated, and causes cold-reduced sheet finished product hardness to reduce.Meanwhile, cooling rate and lower coiling temperature can suppress growing up of crystal grain, crystal grain thinning faster, play the effect of refined crystalline strengthening.Consider, the mode that section cooling takes leading portion to cool, it is 500 DEG C ~ 540 DEG C that the present invention sets coiling temperature.
4, cold rolling draft setting
The present invention adopts 6 roller UCM(omnipotent convexity band intermediate roll play) 5 Stands Cold Tandem Mills carry out once cold rolling production, have the advantages such as organization of production is convenient, cost is low, output is high, Surface Defects in Steel Plate incidence is little compared with secondary cold-rolling.The increase of cold rolling reduction, can promote the recrystallize of continuous annealing, shortens annealing time, the grain refining after recrystallization annealing, and intensity improves, but deflection is brought up to a certain degree, and the load of milling train assembles rising.Consider, the preferably cold rolling draft of the present invention is 85% ~ 92%.
5, annealing temperature setting
Metal is in cold-rolled process, and crystal grain is elongated, and grain orientation changes, and form the texture of certain type, intracrystalline defect also can increase, and is reflected to the change in mechanical property.Therefore, recrystallization annealing is cold rolling rear control and the necessary means changing metal material tissue, texture and performance.After cold rolling roll recovery and recrystallization that hard steel experiences in annealing process and grain growth three processes all have influence on end properties.Annealing temperature is comparatively large on the impact of the punching performance of material, although annealing temperature is too low can significantly improve hardness, can due to non-perfect recrystallization output fibrous tissue, processibility is deteriorated.The too high meeting of annealing temperature makes grain growth, lower hardness.It is 575 DEG C ~ 590 DEG C that the present invention sets steel band in the annealing temperature of vertical continuous annealing furnace soaking zone, is set as 60s ~ 95s in the time of soaking zone.
6, overaging segment process parameter setting
The precipitation impact of aging section technique on C, N compound in material is larger, cooling rate larger after annealing can provide enough precipitation power for separating out, the longer time is conducive to abundant precipitation, amount of precipitation increases, precipitate small and dispersed, while making material have good aging resistance, material hardness improves.But temperature is too low, separate out power and decline on the contrary, amount of precipitation tails off, and solid solution capacity increases, and hardness can improve, but aging resistance is deteriorated.Therefore, the processing parameter of overaging section of the present invention is: rapid cooling terminal temperature 330 DEG C ~ 350 DEG C, overaging 1 segment endpoint temperature 270 DEG C ~ 290 DEG C, overaging 2 segment endpoint temperature 220 DEG C ~ 240 DEG C, overaging 3 segment endpoint temperature 190 DEG C ~ 210 DEG C.
7, smooth unit elongation setting
Smooth main object eliminates material yield platform, and weigh with the index of unit elongation, unit elongation is too low, can not eliminate yield point elongation, and during punching press, local easily produces wrinkle defect.Unit elongation is too high, and crystal grain is significantly elongated, and the horizontal stroke of material, the longitudinal poor performance opposite sex is large, and poor processability, punching press is easily ftractureed.Smooth unit elongation 1.0% ~ 2.0% of the present invention.
The microstructure of the cold rolling hard tin plate that the present invention obtains is ferrite+free cementite, and grain size number is 9 ~ 11 grades, and yield strength is 370MPa ~ 410MPa, tensile strength is 420MPa ~ 460MPa, yield tensile ratio≤0.91, hardness value is HR30T65 ± 3, elongation after fracture A
50>=23%.
The present invention has following positively effect compared to existing technology:
1, the present invention is by optimizing the optimum combination of material component design, hot rolling continuous casting steel billet heating and temperature control, finishing temperature and oiler temperature control, the control of cold rolling draft, vertical continuous annealing furnace annealing temperature and annealing time, overaging segment process, reduce the rolling load of cold-rolling mill, improve the roll speed of cold-rolling mill, cold rolling speed can reach 1200m/min ~ 1400m/min, reduce fault in production rate simultaneously, enhance productivity, reduce manufacturing cost.
2, the present invention produces by adopting cooling controlling and rolling controlling process, rationally annealing temperature control techniques and overaging segment process, by the comprehensive action of refined crystalline strengthening, precipitation strength and solution strengthening, while guarantee ageing resistance performance, obtaining hardness value is the cold rolling hard tin plates in HR30T65 ± 3.
Accompanying drawing explanation
Accompanying drawing 1 is the metallographic structure photo of the present invention's cold rolling hard tin plate embodiment 1.
Accompanying drawing 2 is the stereoscan photograph that the free cementite of the embodiment of the present invention 1 is separated out.
Embodiment
Disclosed in embodiment 1 ~ 4 and comparative example 1-Chinese patent 200910063099.9, comparative example 2-Chinese patent 201010204967.3, the invention will be further described, as shown in table 1 ~ table 4.
Table 1 chemical composition of the present invention (weight percent %), surplus is Fe and inevitable impurity
| Element | C | Si | Mn | P | S | Alt | N | Ti |
| The present invention | 0.051-0.079 | ≤0.10 | 0.20-0.40 | ≤0.020 | ≤0.020 | 0.010-0.060 | ≤0.0060 | |
| Embodiment 1 | 0.062 | 0.010 | 0.33 | 0.018 | 0.010 | 0.035 | 0.0053 | |
| Embodiment 2 | 0.078 | 0.070 | 0.22 | 0.014 | 0.009 | 0.030 | 0.0029 | |
| Embodiment 3 | 0.051 | 0.025 | 0.38 | 0.012 | 0.015 | 0.029 | 0.0034 | |
| Embodiment 4 | 0.069 | 0.046 | 0.29 | 0.015 | 0.011 | 0.056 | 0.0044 | |
| Comparative example 1 | 0.08-0.13 | ≤0.025 | ≤0.65 | ≤0.02 | ≤0.020 | SolAl0.02-0.06 | ≤0.005 | Ti≤0.03 |
| Comparative example 2 | 0.02-0.05 | ≤0.03 | 0.20-0.50 | ≤0.015 | ≤0.015 | 0.010-0.050 | 0.0080-0.0160 |
Obtain by converter melting the chemical composition molten steel that meets the requirements, molten steel carries out continuous casting and obtains continuous casting steel billet after RH stove Fruit storage, and thickness is 210 ~ 230mm, and width is 800 ~ 1300mm, and length is 5000 ~ 10000mm.
The scale slab of STEELMAKING PRODUCTION is delivered to process furnace and is reheated, and delivers to rolling on Continuous Heat tandem rolling mill after dephosphorization of coming out of the stove.After roughing milling train and the controlled rolling of finish rolling Continuous mill train, section cooling takes leading portion to cool, and then batches, output coils of hot-rolled steel.Hot rolling technology controls in table 2.
Table 2 hot rolling technology controling parameters of the present invention
| Hot Rolling Parameters | Slab heating temperature/DEG C | Roughing end temp/DEG C | Finish rolling end temp/DEG C | Finish rolling draft/% | Coiling temperature/DEG C | Hot-rolled sheet thickness/mm |
| The present invention | 1150-1250 | 950-1050 | 840-870 | ≥86 | 500-540 | 2.0-3.5 |
| Embodiment 1 | 1212 | 1020 | 850 | 90 | 506 | 2 |
| Embodiment 2 | 1184 | 980 | 868 | 90 | 522 | 2.1 |
| Embodiment 3 | 1155 | 960 | 851 | 88 | 538 | 2.4 |
| Embodiment 4 | 1245 | 1040 | 843 | 88 | 526 | 2.5 |
| Comparative example 1 | - | - | - | - | - | - |
| Comparative example 2 | 1150-1250 | - | 850-950 | - | 550-580 | - |
Comparative example 1 pair of Hot Rolling Parameters does not have specific requirement completely, and the finish rolling end temp of comparative example 2 and coiling temperature all comparatively the present invention are high, therefore the hot rolling technology controling parameters of comparative example is all different from the present invention.
By above-mentioned coils of hot-rolled steel again uncoiling after overpickling, at 6 roller UCM(omnipotent convexity band intermediate roll play) 5 Stands Cold Tandem Mills carry out once cold rolling, cold rolling draft is 85% ~ 92%, the steel band rolling hard state after cold rolling, through vertical continuous annealing furnace annealing, Wetted constructures, smooth, eleetrotinplate, batches the zinc-plated coil of strip of the finished product obtaining thickness 0.18mm ~ 0.30mm.Annealing process is: steel band is 575 DEG C ~ 590 DEG C in the annealing region of the soaking zone of vertical continuous annealing furnace, is 60s ~ 95s in the time of soaking zone.Process control parameter is in Table 3-4.
Table 3 cold-rolling process controling parameters of the present invention
| Cold-rolling Parameters | Cold rolling draft/% | Four frame rolling load/KN | Five frame rolling load/KN | Roll speed/(m/min) | Cold Rolled Plate Thickness/mm |
| The present invention | 85-92 | - | - | 1200-1400 | 0.18-0.30 |
| Embodiment 1 | 91 | 751.2 | 726.6 | 1230 | 0.18 |
| Embodiment 2 | 89 | 707.1 | 647.8 | 1290 | 0.23 |
| Embodiment 3 | 89 | 672.8 | 594.5 | 1310 | 0.26 |
| Embodiment 4 | 88 | 650.5 | 530.6 | 1380 | 0.30 |
| Comparative example 1 | 80-90 | - | - | - | 0.20-0.39 |
| Comparative example 2 | 80-90 | - | - | - | - |
Table 4 annealing process of the present invention, aging technique and smooth process control parameter
| Parameter | Soaking zone temperature/DEG C | Rapid cooling terminal temperature/DEG C | Overaging 1 segment endpoint temperature/DEG C | Overaging 2 segment endpoint temperature/DEG C | Overaging 3 segment endpoint temperature/DEG C | Annealing time/s | Smooth unit elongation/% |
| The present invention | 575-590 | 330-350 | 270-290 | 220-240 | 190-210 | 60-95 | 1.0-2.0 |
| Embodiment 1 | 580 | 336 | 276 | 229 | 196 | 76 | 1.7 |
| Embodiment 2 | 588 | 349 | 286 | 239 | 209 | 93 | 1.1 |
| Embodiment 3 | 576 | 332 | 270 | 223 | 193 | 62 | 1.9 |
| Embodiment 4 | 585 | 341 | 281 | 234 | 201 | 85 | 1.3 |
Comparative example 1 adopts bell-type annealing furnace annealing, and comparative example 2 adopts secondary cold-rolling, is all different from the present invention
The cold rolling hard tin plate utilizing aforesaid method to obtain.With reference to accompanying drawing 1,2, the microstructure of cold rolling hard tin plate is ferrite+free cementite, tiny free cementite is the distribution in disperse shape on carbon body matrix, grain size number is 9 ~ 11 grades, yield strength is 370MPa-410MPa, and tensile strength is 420MPa-460MPa, yield tensile ratio≤0.91, hardness value is HR30T65 ± 3, elongation after fracture A
50>=23%.
Cold rolling hard tin plate the present invention obtained carries out tension test, according to metallic substance Rockwell hardness test part 1 according to " GB/T228.1-2010 metal material stretching test part 1: room temperature test method ": test method (GB/T230.1-2009) carries out hardness test.Carry out resistance to aging index test as follows: carried out being stretched to elongation 8% by steel plate, toast 1 hour at 100 DEG C of temperature, continue to stretch, the difference of twice stretch resistance counts resistance to aging index.The mechanical property of steel plate is in table 5.
The mechanical property of the cold rolling hard tin plate of table 5 the present invention
| Performance index | Yield strength/MPa | Tensile strength/MPa | Hardness/HRT30 | Yield tensile ratio | Elongation after fracture A 50/% | The AI of resistance to aging index |
| The present invention | 370-410 | 420-460 | 62-68 | ≤0.91 | ≥23 | 60-80 |
| Embodiment 1 | 385 | 437 | 64.2 | 0.88 | 27.8 | 76 |
| Embodiment 2 | 409 | 454 | 67.3 | 0.90 | 24.6 | 68 |
| Embodiment 3 | 373 | 429 | 63.5 | 0.87 | 29.7 | 72 |
| Embodiment 4 | 397 | 446 | 65.4 | 0.89 | 26.4 | 64 |
| Comparative example 1 | - | - | 60-70 | - | - | - |
| Comparative example 2 | - | - | 70-80 | - | - | - |
Durometer level value in table 5 in comparative example is comparatively large, and not mentioned plasticity index with stampability height correlation and ageing resistance, therefore be all different from the present invention.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (6)
1. a cold rolling hard tin plate, is characterized in that chemical composition mass percent is: C:0.051% ~ 0.079%, Si≤0.1%, Mn:0.20% ~ 0.40%, P≤0.020%, S≤0.020%, Alt:0.010% ~ 0.060%, N≤0.0060%, surplus is Fe and inevitable impurity element.
2. cold rolling hard tin plate as claimed in claim 1, it is organized as ferrite+free cementite, and described grain fineness number of organizing is 9 ~ 11 grades.
3. cold rolling hard tin plate as claimed in claim 1 or 2, the thick cold rolling hard tin plate yield strength of its 0.18mm ~ 0.30mm is 370MPa ~ 410MPa, and tensile strength is 420MPa ~ 460MPa, yield tensile ratio≤0.91, hardness value is HR30T65 ± 3, elongation after fracture A
50>=23%.
4. the production method of the cold rolling hard tin plate as described in as arbitrary in claim 1-3, comprising:
Molten steel carries out continuous casting and obtains continuous casting steel billet after Fruit storage;
Continuous casting steel billet carries out hot rolling after process furnace is heated to 1150 DEG C ~ 1270 DEG C, and described hot rolling is two-part rolling technology, and roughing is 5 passage tandem rollings, and finish rolling is 7 passage tandem rollings, and finish rolling end temp is 840 DEG C ~ 870 DEG C; After finish rolling, section cooling adopts leading portion cooling, and coiling temperature is 500 DEG C ~ 540 DEG C and batches acquisition coils of hot-rolled steel;
Coils of hot-rolled steel again after uncoiling through pickling, cold rolling, vertical continuous annealing furnace annealing, smooth, eleetrotinplate, batch that to obtain thickness be 0.18mm ~ 0.30mm finished product, described cold rolling draft is 85% ~ 92%, the hard state band steel that rolls after cold rolling is 575 DEG C ~ 590 DEG C in the temperature of vertical continuous annealing furnace annealing soak section, be 60s ~ 95s with steel at the annealing time of soaking zone, smoothly extend to rate 1.0% ~ 2.0%.
5. the production method of cold rolling hard tin plate as claimed in claim 4, is characterized in that, after hot fine rolling, controlling hot-rolled steel sheet thickness is 2.0 ~ 3.5mm.
6. the production method of cold rolling hard tin plate as claimed in claim 4, it is characterized in that, the hard state band steel that rolls after cold rolling is 330 DEG C ~ 350 DEG C in vertical continuous annealing furnace rapid cooling terminal temperature, overaging 1 segment endpoint temperature is 270 DEG C ~ 290 DEG C, overaging 2 segment endpoint temperature is 220 DEG C ~ 240 DEG C, and overaging 3 segment endpoint temperature is 190 DEG C ~ 210 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410515355.4A CN105525214A (en) | 2014-09-30 | 2014-09-30 | Cold rolling hard tinning steel plate and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410515355.4A CN105525214A (en) | 2014-09-30 | 2014-09-30 | Cold rolling hard tinning steel plate and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105525214A true CN105525214A (en) | 2016-04-27 |
Family
ID=55767733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410515355.4A Pending CN105525214A (en) | 2014-09-30 | 2014-09-30 | Cold rolling hard tinning steel plate and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105525214A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419172A (en) * | 2016-05-23 | 2017-12-01 | 上海梅山钢铁股份有限公司 | A kind of inexpensive cold rolling hard tin plate and its production method |
| CN108085582A (en) * | 2017-12-07 | 2018-05-29 | 河钢股份有限公司承德分公司 | A kind of food-grade tinplate base-material and preparation method thereof |
| CN108796381A (en) * | 2017-04-26 | 2018-11-13 | 宝山钢铁股份有限公司 | The steel plate and its manufacturing method of a kind of high axial bearing capacity of tank and excellent formability |
| CN110106449A (en) * | 2019-05-31 | 2019-08-09 | 张家港扬子江冷轧板有限公司 | Cold-rolled thin steel strip for battery case and production method thereof |
| CN110551939A (en) * | 2018-06-04 | 2019-12-10 | 上海梅山钢铁股份有限公司 | Hot-dip galvanized steel plate with yield strength of 320MPa and production method thereof |
| CN112779386A (en) * | 2019-11-05 | 2021-05-11 | 上海梅山钢铁股份有限公司 | Cold-rolled hot-dip galvanized steel plate for easy-open-end pull ring and manufacturing method thereof |
| CN114250410A (en) * | 2020-09-22 | 2022-03-29 | 上海梅山钢铁股份有限公司 | High-hardness cold-rolled electrotinning substrate and production method thereof |
| CN114643279A (en) * | 2022-01-29 | 2022-06-21 | 安阳钢铁股份有限公司 | Method for controlling shape of ultrathin ultra-wide steel strip for continuous galvanizing |
-
2014
- 2014-09-30 CN CN201410515355.4A patent/CN105525214A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 李俊: ""生产镀锡原板的冶金工艺控制原理"", 《宝钢技术》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419172A (en) * | 2016-05-23 | 2017-12-01 | 上海梅山钢铁股份有限公司 | A kind of inexpensive cold rolling hard tin plate and its production method |
| CN108796381A (en) * | 2017-04-26 | 2018-11-13 | 宝山钢铁股份有限公司 | The steel plate and its manufacturing method of a kind of high axial bearing capacity of tank and excellent formability |
| CN108796381B (en) * | 2017-04-26 | 2020-08-25 | 宝山钢铁股份有限公司 | Steel plate with high axial bearing capacity and excellent formability for tank and manufacturing method thereof |
| CN108085582A (en) * | 2017-12-07 | 2018-05-29 | 河钢股份有限公司承德分公司 | A kind of food-grade tinplate base-material and preparation method thereof |
| CN110551939A (en) * | 2018-06-04 | 2019-12-10 | 上海梅山钢铁股份有限公司 | Hot-dip galvanized steel plate with yield strength of 320MPa and production method thereof |
| CN110106449A (en) * | 2019-05-31 | 2019-08-09 | 张家港扬子江冷轧板有限公司 | Cold-rolled thin steel strip for battery case and production method thereof |
| CN112779386A (en) * | 2019-11-05 | 2021-05-11 | 上海梅山钢铁股份有限公司 | Cold-rolled hot-dip galvanized steel plate for easy-open-end pull ring and manufacturing method thereof |
| CN114250410A (en) * | 2020-09-22 | 2022-03-29 | 上海梅山钢铁股份有限公司 | High-hardness cold-rolled electrotinning substrate and production method thereof |
| CN114643279A (en) * | 2022-01-29 | 2022-06-21 | 安阳钢铁股份有限公司 | Method for controlling shape of ultrathin ultra-wide steel strip for continuous galvanizing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105112776A (en) | Phosphorus-containing low-carbon cold-rolled hard tin-plated steel plate and production method thereof | |
| CN104946969B (en) | Hot-rolled pickled steel plate for air conditioner compressor housings and manufacturing method thereof | |
| CN106319329A (en) | Method for producing cold rolling hard tinning steel plate | |
| CN103510002B (en) | A kind of gap-free atom cold rolling hot dip galvanizing steel plate and production method thereof | |
| CN105525214A (en) | Cold rolling hard tinning steel plate and production method thereof | |
| CN101914725B (en) | Low-carbon ultra-deep punching cold-rolling steel sheet and production method thereof | |
| CN104946968B (en) | A kind of beverage can bottom cold-rolled tin plate and its production method | |
| CN103882202B (en) | The manufacture method of the high-strength hot-galvanized steel of a kind of continuous annealing | |
| CN102925794B (en) | Cold-rolled steel strip for double-layer welded tube and its manufacture mathod | |
| CN104419865B (en) | A kind of easy-open end cold-rolled tin plate and production method thereof | |
| CN101880825A (en) | Ultra-fine-grained hot-rolled dual-phase steel with tensile strength above 750MPa and method for manufacturing the same | |
| WO2010119971A1 (en) | Cold-rolled steel sheet having excellent slow-aging property and high curability in baking, and method for producing same | |
| CN106854729A (en) | A kind of phosphorous gap-free atom cold-rolling galvanization steel plate and its manufacture method | |
| CN104419877A (en) | Cold-rolled martensitic steel with weather resistance and manufacturing method thereof | |
| CN103320689A (en) | Aluminum-zinc hot plating deep drawing steel with thick gauge of more than 1.2 mm, and manufacturing method thereof | |
| CN107779743A (en) | Micro- carbon hot rolling acid-cleaning steel plate and its manufacture method with good deep drawability | |
| CN102653839A (en) | Low-temperature continuous-annealing interstitial-free atom cold-rolled steel plate and production method thereof | |
| CN105441795A (en) | Low carbon cold-rolled steel sheet for LED lead frame and production method thereof | |
| CN101818299A (en) | High-strength thin-specification direct-plating steel based on thin slab casting and rolling process and making method thereof | |
| CN107419172A (en) | A kind of inexpensive cold rolling hard tin plate and its production method | |
| CN105624559A (en) | Thick-gauge ultra-deep drawing cold rolled steel plate and manufacturing method thereof | |
| CN106191682A (en) | A kind of easy-open end draw ring cold rolling hot-dip galvanized steel sheet and production method thereof | |
| CN106756524B (en) | A kind of chemical barrel cold rolling tinning substrate and its manufacturing method | |
| CN110172637B (en) | High-strength interstitial-free steel strip for 340 MPa-level deep drawing and preparation method thereof | |
| CN111690871B (en) | Hot-rolled steel plate for cold-rolled electro-galvanized steel plate and manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160427 |
|
| RJ01 | Rejection of invention patent application after publication |