CN1043904C - Steel sheet of high stress-corrosion-cracking resistance for cans and method of manufacturing the same - Google Patents
Steel sheet of high stress-corrosion-cracking resistance for cans and method of manufacturing the same Download PDFInfo
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- CN1043904C CN1043904C CN94190649A CN94190649A CN1043904C CN 1043904 C CN1043904 C CN 1043904C CN 94190649 A CN94190649 A CN 94190649A CN 94190649 A CN94190649 A CN 94190649A CN 1043904 C CN1043904 C CN 1043904C
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0436—Cold 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0426—Hot rolling
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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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
- C21D8/0468—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment between cold rolling steps
Abstract
A steel sheet of a high stress-corrosion-cracking resistance for cans and method for manufacturing same are provided, the steel sheet having an aging index of not less than 15 MPa, the relative average visibility of an electron channeling pattern measured with respect to not less than 20 crystal grains, which are not less than 50 mu m away from one another, in an intermediate portion of the steel sheet in the direction of the thickness thereof being not more than 0.85; and a method of manufacturing the steel sheet. The present invention provides a steel sheet for two-piece cans and three-piece cans which has a small thickness and a high stress-corrosion-cracking resistance.
Description
Technical field
The invention relates to have strong stress-corrosion-cracking resistance, be used for by two parts constitute the jar and by three parts constitute the jar ultra-thin steel sheet and manufacture method thereof.
Background technology
The zinc-plated Tinplate of making and through the steel plate for tanks such as tin free steel sheet that peroxychromic acid is handled on steel plate is used to make food cans, aerosol canister, pop can etc. in large quantities.This class jar can be distinguished jar that is made of two parts and the jar that is made of three parts substantially.
By the jar that two parts constitute, its tank body and bottom are one, add lid, are made up of two parts altogether.Because low cost of manufacture, in recent years, the jar shared ratio in the total amount of jar that is made of two parts increases year by year.By two parts constitute the jar, need through multistage deep-draw processing or the DWI processing (abbreviation of Drawing and Wall Lroning, be that deep-draw processing back attenuate stretches) etc. harsh process operation, therefore not only require erosion resistance but also require good processing properties.
As typical case's representative of the jar that constitutes by two parts, an example of the general manufacturing process of narration DWI jar below.
Use the deep draw power apparatus by the discous blank plate of the steel band upper punch circle of contact, meanwhile utilize punch and die that shallow the washing of this blank plate dashed the formation cup-shaped, use the DWI pressing machine then, adopt the gap side edge attenuate limit to be stretched less than the punch and the die of cup sidewall thickness, the thickness of sidewall is reduced, form the cup-shaped tank body of prescribed depth, this forming technology just is called DWI processing.After this, with the bottom of jar end forming mill making can bodies, form the arch of projection to the inside at the bottom of making jar.
Add man-hour at DWI, because the anisotropy of Drawing abillity forms undulatory ear after the processing on the circumferential direction of tank body upper end, this phenomenon is called as lug.With deflasher ledge portion is cut away, make the height unanimity of tank body upper end.
Subsequently, above-mentioned tank body is clean, dry, outside surface at jar imposes printing and application, then, be intended to reduce the multistage eck processing of tank body opening diameter with the eck hemming machine, load onto lid at the tank body opening end then, will carry out flanging processing for this reason, form the flange that stretches out to the radial direction outside at open end.
The main characteristic that the DWI steel plate for tanks need possess has: compressive strength and panel (panelling) intensity behind DWI processibility, deep-draw lug, eck processibility, flanging processibility and the formation tank body.
The implication division of these performances is as follows.
The DWI processibility is meant that metal die wearing and tearing situation and processing dynamics little, rare and the metal die adhesion consumes low in the DWI course of processing.
It is as much as possible little that lug is meant that DWI adds the lug that forms man-hour, because will ledge portion be cut away with deflasher in the eck first being processed, if lug is bigger, the utilization ratio of material will reduce so.
The eck processibility is meant the performance that does not produce wrinkle in the multistage eck course of processing.
The flanging processibility is meant that flanging adds the crackle that man-hour, difficult generation caused the content of jar to be leaked out by the flanging place, promptly is commonly referred to the defective of flanging crackle.
Compressive strength is meant, outside the giving prominence in critical jar that expands phenomenon in position weak on the tank body is pressed the effect owing to interior pressure behind the lid curling joint.For at the bottom of pressing the more weak part of ability to bear to be jar in the jar and lid, therefore, at the bottom of compressive strength depends on jar usually and the mechanical strength of lid.
Panel intensity is meant and will owing to external pressure tank body part be pressed to inboard critical external pressure behind the lid curling joint.Jar for the effect intensity of force that comes from the outside, is represented with panel intensity when casing, carry, unpacking and falling in vending machine mostly.
The jar that is made of three parts is described below.
With jar comparing of being made of two parts, the panel intensity of the jar that is made of three parts wants high, owing to have this advantage, its absolute production quantity is increasing gradually.
Roughly make by the jar that three parts constitute by the following stated.
At first, in the fixed printing of the enterprising professional etiquette of steel plate and internal surface application, drying, use stapling machine then, be divided into rolling direction and be cut into the stock of square plate of prescribed level with vertical direction 2 procedures of rolling direction, be rolled into cylinder with the tank body processing machine, adopt methods such as welding, bonding, soldering to connect then, form tank body.Then, be intended to dwindle the multistage eck processing of tank body opening diameter, subsequently,, carry out flanging processing, form along the flanging portion that radial direction extends laterally at open end at tank body opening end mounting cover with the eck hemming machine.At last, will cover with the double seam seamer or the end is installed in flanging portion.
According to the difference of mode of connection, the jar that is made of three parts can be divided into welded tank, glued joint jar and soldering jar.The width of the lap of connection seam crossing is big more, and the utilization ratio of material is low more, and therefore, the consumption of the welded tank of this lap width minimum increases gradually.
The characteristic that the welding steel plate for tanks requires to possess mainly contains weldability, eck processibility, flanging processibility and panel intensity.
Weldability is meant that the range of current that can weld is wide, just has enough strength of joint and do not produce the range of current of spot wide.But the welding current scope is wide more, and welding operation is stable more.
The implication of eck processibility, flanging processibility and plate intensity is with noted earlier identical.
In addition, no matter be jar that constitutes by two parts or the jar that constitutes by three parts, consider that from the angle that economizes on resources the producer that produces jar requires to make the thickness of slab of the steel plate for tanks that the producer of steel plate for tanks provides and gets over Bao Yuehao.But steel plate is thin more, and lug, eck processibility and flanging processibility are just poor more, and the intensity of jar also can reduce, and brings a series of problems.Therefore, provide the thickness of plate little and can guarantee that the steel plate for tanks of lug, eck processibility, flanging and jar intensity stipulated is a problem that urgency is to be solved.
Before this, in order to address the above problem, the inventor had once submitted the flat 4-132712 of special hope (spy opens flat 5-345924) number patent application to.This invention is suitably to control chemical ingredients, particularly C content is eased down to the limit and adds Ti, Nb and B, control the secondary cold-rolling condition on this basis, thus can make the little and lug of plate thickness, DWI processibility good, the steel plate for tanks that constitutes by two parts and welded tank ultra-thin steel sheet with good flanging processibility.
But, after this patent of application, further scrutinize discovery, follow the thickness of steel plate for tanks to reduce, stress corrosion crack happens occasionally, and comprises the prior art of the technical scheme that the inventor proposed in the past, can not prevent stress corrosion crack fully.
Stress corrosion cracking is the crackle that runs through the thickness of plate, and it can cause sneaking into of content leaks and extraneous foreign matter, is an important defective.The reason of its generation also has many places fuzzy, generally be at steel plate stressed condition, jar shape and the composition of processing conditions, content and hydrogen ion concentration many unfavorable factors such as (pH) take place when being superimposed.It is believed that steel plate thickness causes the reason of stress corrosion cracking, be that not only steel plate thickness reduces to cause crackle to connect steel plate easily, but also be to satisfy the special methods that steel plate thickness reduces requirement, makes steel plate.
The objective of the invention is, solve above-mentioned problem, very thin thickness is provided and have strong stress corrosion dehiscence resistant, the steel plate for tanks that constitutes by two parts and steel plate for tanks and the manufacture method thereof that constitutes by three parts.
Explanation of the present invention
Steel plate for tanks with strong stress-corrosion-cracking resistance of the present invention, it is characterized in that: % contains C in weight: be not more than 0.0015%, Mn:0.05-0.40%, P: be not more than 0.06%, S: be not more than 0.06%, sour solvable Al: be not more than 0.10%, N: be not more than 0.0100%; Also contain following at least a
Ti:3.4 * ([the weight % of N]-0.0010) % above to below 0.06% and
Nb:6.6 * ([the weight % of N]-0.0010) % is above to below 0.06%; The k-surplus is iron and unavoidable impurities.Steel plate of the present invention has the above aging index of 15MPa, and to the thickness of slab center is below 0.85 at a distance of the average relatively sharpness that is no less than the electron channelling pattern that the crystal grain more than 20 measures more than the 50 μ m each other.
In addition, the present invention relates to a kind of manufacture method of steel plate for tanks, it is characterized in that, the hot hot rolling of steel billet that will be made of above-mentioned chemical ingredients with the finishing temperature more than 810 ℃ is to the plate thickness more than the 2.0mm, then, after hot rolled strip leaves the last planishing stand of hot rolling unit in 1.5 seconds, it is batched simultaneously carrying out the water cooling one side by the temperature more than [finishing temperature-30] ℃ on the runoff table, pickling and cold-rolling then, recrystallization annealing, draft with 0.7-60% carries out secondary cold-rolling, makes mean strain speed (SR) by following formula definition more than 12.4 S-1.
In the formula, r: draft (-)
R: work roll radius (mm)
T: input side thickness of slab (mm)
V: working roll circumferential speed (m/min)
Implement preferred plan of the present invention
The inventor finds, exist confidential relation between the generation of sharpness of the electron channelling pattern of steel plate (sharpness) and stress corrosion cracking, and then this relation carried out systematic research, and the manufacture method of steel plate has been carried out various tests, the result has confirmed following:
(1) the average relatively little steel plate of sharpness of electron channelling pattern, its stress-corrosion-cracking resistance is stronger.
(2) having a certain amount of above solid solution C and solid solution N also is the prerequisite that prevents stress corrosion crack.
(3) condition of control secondary cold-rolling, particularly control mean strain speed between roll gap, for the sharpness that reduces electron channelling pattern cause close important.
(4) suitably control chemical ingredients, particularly C content is eased down to the limit, suitably control hot-rolled condition simultaneously, these also are the prerequisites that steel plate is made.
The present invention is based on these new discoveries and finishes.
Explain the present invention below.
At first, electron channelling pattern and the sharpness thereof to steel plate is illustrated.
The average relatively sharpness (sharpness) of electron channelling pattern (Electron Chanelling Pattern is hereinafter to be referred as ECP) is a most important integrant of the present invention.Use the electron beam angle scanning of scanning electronic microscope to crystalline material, when satisfying the bragg reflection condition, input angle can produce the passage phenomenon, obtain the image formed by the line of many plan chrysanthemums, this image is called as electron channelling pattern, can be used for studying the steel plate of the crystallization position of crystal grain one by one to industrial manufacturing, sometimes differing obtains ECP clearly surely.When carrying out crystallization to the research of position, the gap of the line of 3 groups of parallel plan chrysanthemums of ECP and their parallel lines intersect and the coordinate at the center of the parallelogram that forms is crucial.The indistinctness of ECP is handled as disturbing.
The inventor finds that have correlationship between the sharpness of this ECP and the stress corrosion cracking incidence, sharpness is less than the steel plate for tanks of certain value, and the performance of its stress corrosion dehiscence resistant is stronger.
The sharpness quantification is had several method, the inventor really usefulness be method described in " ECP portrait resolve To I Ru crystallization askew measuring method " (Japanese Metallkunde can No. 1 (1991) 22-28 page or leaf of will the 55th volume).
Promptly, use and the direct-connected image analysis apparatus of scanning electronic microscope, carry out a series of ECP picture processing such as picture processing, digitizing, digital image processing of image input, grey scale change, the length sum of establishing the line of intending chrysanthemum clearly in the ECP image then is that the width of the line of intending chrysanthemum clearly in L, the ECP image is that the area of W, ECP image is A, will be defined as sharpness by the amount S that following (1) formula is represented:
S=L×W/A (1)
Image input recited above is meant the ECP image is input in the image analysis apparatus by the average additive operation of scanning electronic microscope.
The picture processing of described grey scale change is meant the processing that comprises the following steps: (1) uses the image filtering of intermediate value wave filter with input; (2) carry out linear transformation, make grey level's minimum value and the grey level's that maximum value becomes image analysis apparatus lower value and higher limit; (3) local averageization of selecting; (4) carry out 2 dimension differential with the Sobel wave filter; (5) carry out gamma transformation, then carry out logarithmic transformation, carry out the gal conversion again; (6) last, carry out the filtering of target image once more with the intermediate value wave filter.
Described digitizing is meant, the image setting fixed threshold to the picture processing of grey scale change finishes then according to bigger or little than this threshold value, is transformed into 2 numerical value.
Described digital image processing is meant the processing that comprises the steps: (1) for the image that digitizing finishes, and removes the upright point of arc, amplifies then and dwindles processing; (2) carry out smoothing and handle, carry out filling perforation then and handle; (3) carry out graph thinning with the method for Tian Cun (believe full high aim, the 1539th volume 1974 1390 pages) and handle, amplify processing at last once more.
The inventor uses TOSP IX-II type image analysis apparatus to carry out above-mentioned image analysis, and other any image analysis apparatus as long as have the image analysis capabilities identical or higher with above-mentioned model, also can be used to carry out above-mentioned picture processing.Sharpness S is the physical quantity of steel plate, and is irrelevant with the model of image analysis apparatus.In addition, scanning electronic microscope is not directly to be connected with image analysis apparatus, can transmit data with carriers such as tapes yet.
Intending Kikuchi lines clearly, in fact is exactly all curves in the image after above-mentioned picture processing finishes, and this is because the line of unsharp plan chrysanthemum is eliminated in the process of picture processing.Judge that whether clear standard is digitized threshold value.The inventor adopts 50 as threshold value.
The length sum L that intends Kikuchi lines clearly in the ECP image is alternate all the length of a curve sums in the image after above-mentioned picture processing finishes, and its numerical value can be easy to obtain with general image analysis apparatus.
The width W of intending Kikuchi lines in the ECP image clearly is a constant numerical value, also can be easy to obtain with general image analysis apparatus.
In addition, the area A of ECP image is the constant that does not rely on sample.
X-ray diffraction can provide the average crystalline orientation information as the steel plate of polycrystalline material, relative therewith, the characteristics of ECP are to use very thin electron beam, therefore can provide the information of the orientation of crystal grain one by one, the orientation of the crystal grain that the sharpness S that the result records also depends on electron beam consumingly and hit.But, the not direct relation of the orientation of crystal grain and stress corrosion cracking, therefore corresponding mutually with stress corrosion cracking in order to make sharpness, must from sharpness, remove the orientation role.
For this reason, the inventor measures sharpness S respectively at a distance of the crystal grain more than 20 more than the 50 μ m each other to the thickness of slab centre, with they arithmetical means, obtains average sharpness AS.Here said thickness of slab centre is meant, from the thickness of slab center to front and back extend, scope thickness of slab about 1/4 with interior part, as long as all right anyplace in this section.Steel plate for tanks is a polycrystalline material, and average sharpness AS is the amount that obtains after the influence of the orientation of each crystal grain is removed, thereby constitutes corresponding relation mutually with stress corrosion cracking.
In order to further strengthen the mutual relationship with stress corrosion cracking, the inventor has adopted average relatively sharpness RAS.Average relatively sharpness RAS removes the normalized value for the average sharpness AS of test materials with the average sharpness of not processing the strained standard test specimen.Average relatively sharpness RAS is the physical quantity of steel plate, can use scanning electronic microscope and image analysis apparatus, measures according to the description in the above-mentioned paper (No. 1 (1991) 22-28 page or leaf of Japanese Metallkunde meeting will the 55th volume).
According to the inventor's test, average relatively sharpness RAS represents the correlationship with stress corrosion cracking.Its numerical value surpasses at 0.85 o'clock, can not prevent stress corrosion cracking fully, therefore is decided to be the upper limit with 0.85.
Being used to carry out the sample that ECP measures, is to be ground to the thickness of slab centre from one side, utilizes chemical rightenning to carry out precision work then, and the surface that electron beam will be hit becomes mirror status.
The following describes the chemical ingredients of steel of the present invention, i.e. effect of each element and suitable scope thereof.
C:C content was above 0.0015% o'clock, not only can not prevent stress corrosion cracking fully, and the jar that is made of two parts is with variation all such as the lug of ultra-thin steel sheet, DWI processibility, flanging processibility, in addition, welded tank also will worsen with the flanging processibility of ultra-thin steel sheet, therefore C content will be limited to below 0.0015%.
Though C is still not fully aware of for the mechanism of these Effect on Performance, it is believed that following reason:
(1) with regard to the relation of C and stress corrosion cracking, in order to prevent stress corrosion cracking, must guarantee to have the solid solution C of some amount, when the C amount surpasses higher limit, increase at the position of separating out of carbide, can not guarantee for the quantity that prevents the highly effective solid solution C of stress corrosion cracking.
(2), be that the high purityization of composition is remarkable because steel C content of the present invention is low, thereby the texture of arranging lug is improved in the reason that is used for demonstrating during with ultra-thin steel sheet good lug by the jar that two parts constitute.
(3) show that good DWI processibility is because steel C content of the present invention is extremely low, does not have the carbide harder than ferrite, therefore, even with identical draft carry out 2 times cold rolling, inner accumulation strain amount is still very little, it is also just very little that DWI adds the resistance to deformation in man-hour.
(4) show that when being used for welded tank good flanging processing characteristics is because steel C content of the present invention is extremely low, does not have the hardening phenomenon of weld common in the common steel, therefore can not produce the stress concentration at sclerosis position with ultra-thin steel sheet.In addition, because steel C content of the present invention is extremely low, do not exist the prejudicial carbide of ductility, therefore, cold rollingly still demonstrate high local ductility even carry out 2 times, flanging adds the potential energy of deformation height of material in man-hour.
When wanting to use ultra-thin steel sheet with the jar that thinner thickness of slab manufacturing is made of two parts with ultra-thin steel sheet and welded tank, C content is preferably below 0.0010%.
Mn:, can not make steel plate for tanks, so its content must be more than 0.05% owing to when Mn is lower than 0.05%, produce red brittleness.On the other hand, when its content surpassed 0.40%, steel plate too hardened, and flanging processibility and DWI processibility worsen, and have also offset the resulting composition high purity of attenuating C content effect, make the lug variation, and production cost improves simultaneously.Therefore it is defined as 0.05-0.40%.
P: be not the beneficial element that must add, it significantly hardens steel, is the unavoidable impurities element.Its content surpasses at 0.06% o'clock, and steel plate too hardens, and causes flanging processibility and DWI processibility variation, also offset in addition and lower the resulting composition high purity of C content effect, cause the lug variation, simultaneously solidity to corrosion also worsens, so will on be defined as 0.06%.Expect better flanging processibility, DWI processibility, lug and solidity to corrosion, its content is preferably in below 0.02%.
S: also be the element that there is no need specially to add, it increases red brittleness, is the unavoidable impurities element.Its content surpasses at 0.06% o'clock, can not make steel plate for tanks owing to red brittleness, therefore its upper content limit is decided to be 0.06%, and preferred range is below 0.02%.
Al: be absolutely necessary as deoxidant element, but be not to exist with the form of the solvable Al of acid.In addition, from considering that with the synergistic angle of the composition of steel of other kind sour solvable Al is lower than at 0.100% o'clock, effect of the present invention can not lost, if its content surpasses 0.100%, and Al then
2O
3Be that inclusion increases, cause the system jar to add and produce flanging crackle or DWI processibility variation man-hour that production cost also will improve in addition, therefore will be defined as 0.100% on it.
N: also be the element that there is no need specially to add, it makes hardening of steel, is the unavoidable impurities element.Its content surpasses at 0.0100% o'clock, and steel plate too hardens, and flanging processibility and DWI processibility worsen, and has also offset the composition high purity effect of the generation of C content attenuating in addition, causes the lug variation, so its upper content limit is decided to be 0.0100%.
B: add B and can further improve effect of the present invention.Its content is lower than at 0.0001% o'clock, and stress corrosion cracking is easy to generate, and the lug of goods, DWI processibility, eck processibility variation, thereby its lower limit is advisable 0.0001%.In addition, B content is higher than at 0.0060% o'clock, and recrystallization temperature raises, and the alloy production cost is improved, so its upper limit is advisable 0.0060%.
Ti and Nb: add Ti, Nb and can further improve effect of the present invention.When the addition of these elements is big, can easily obtain the good jar that constitutes by two parts of lug with ultra-thin steel sheet and the good welded tank ultra-thin steel sheet of flanging processibility.But, being difficult to prevent stress corrosion cracking, the alloy production cost improves and recrystallization temperature rises.Otherwise, if their addition very little, though can avoid stress corrosion cracking, alloy production cost to increase and shortcoming such as recrystallization temperature rising, be difficult to obtain lug jar good, that constitute by two parts with ultra-thin steel sheet and the good welded tank ultra-thin steel sheet of flanging processibility.
For this reason, the relation of the inventor's other composition from Ti and Nb and steel is started with, at length studied and increase of alloy production cost and recrystallization temperature rising can be controlled in the scope of allowing on the industrial production, the jar that constitutes by two parts that can obtain having strong anti-stress-corrosion crack performance again with ultra-thin steel sheet and welded tank with the Ti of ultra-thin steel sheet and the addition of Nb, found that, when being limited in C content in the above-mentioned scope, be effective according to the addition of Ti and Nb being controlled in the following ranges with the relation of N content.
Ti: with regard to regard to the relation of N content, if Ti content is lower than 3.4 * ([the weight % of N]-0.0010) %, the then lug of goods, DWI processibility, eck processibility variation, thereby it is defined as 3.4 * ([the weight % of N]-0.0010) % down.In addition, Ti content will be difficult to prevent stress corrosion cracking fully that recrystallization temperature significantly raises if surpass 0.06%, and the production cost of alloy also increases, so will be defined as 0.06% on it.
Nb: aspect the relation of N content, if Nb content is lower than 6.6 * ([the weight % of N]-0.0010%), the lug of goods, DWI processibility, eck processibility will variation, therefore it are defined as 6.6 * ([the weight % of N]-0.0010) % down.In addition, if Nb content surpasses 0.06%, be difficult to then prevent stress corrosion cracking fully that recrystallization temperature significantly raises, the alloy production cost also will increase, thereby will be defined as 0.06% on it.
Ti and Nb need only a kind of the getting final product effectively of adding wherein in above-mentioned scope, can certainly two kinds of interpolations together.
In order to prevent stress corrosion cracking, must there be a certain amount of above solid solution C and solid solution N.In order to limit the amount of solid solution C and solid solution N, can adopt the strict content of measuring them of methods such as in-fighting method, electrical resistance method, but, consider that from the angle of the production management of the such mechanicals of steel plate hope can have easier method.According to the inventor's result of study, do not need directly to measure solid solution C and solid solution N, can limit these elements easily by measuring aging index.
Here said " aging index ", be when instigating tensile test specimen to produce 10% stretching prestrain flow stress with again it is carried out lower yield stress poor after 100 ℃ * 1 hour the artificial aging.When aging index is lower than 15MPa, prevent fully that stress corrosion is very difficult, therefore be defined as 15MPa under it.
The following describes the manufacture method of steel of the present invention.
With the steel of ordinary method melting, process continuous casting or ingot casting and breaking down cogging form hot steel billet, carry out hot rolling then.The heat-treat condition of steel billet can be undertaken by any conventional process before the hot rolling, that is, hot steel billet directly can be sent to rolling, rolling again after also can in process furnace, reheating.
In the present invention, the necessary hot rolled finishing temperature that guarantees can not guarantee that more than 810 ℃ the low excessively reheat temperature of above-mentioned finishing temperature cannot adopt.For common equipment of hot rolling, when the reheat temperature is lower than 1000 ℃, be difficult to guarantee finishing temperature more than 810 ℃, therefore, the reheat temperature should be more than 1000 ℃.
When the finishing temperature during hot rolling is lower than 810 ℃, can not reach purpose of the present invention, its reason is as follows:
(1) thickness of slab of hot rolled strip is difficult to control, and the result makes the thickness of slab when cold rolling also be difficult to control, and the thickness of slab deterioration in accuracy of steel plate goods simultaneously, often ruptures at cold rolling operation light plate.For making ultra-thin steel sheet, this is a fatal shortcoming.
(2) in hot rolled strip, form, cause the DWI of steel plate to add lug increase in man-hour, thereby make the material use efficiency of can factory reduce for the deleterious texture of lug performance.
(3) be difficult to prevent fully that stress corrosion cracking from taking place.It is believed that this also is owing to form the cause of texture in the hot rolled strip.
If the thickness of slab that hot rolling finishes is lower than 2.0mm, be not easy to guarantee desired finishing temperature, do not utilize to prevent stress corrosion cracking yet, thereby be lower limit with 2.0mm.
Research according to the inventor, temperature (cooling beginning temperature) when leaving the finish to gauge support to time that begins to cool down at runoff table (cooling time opening) and cooling beginning from hot rolled strip, on average sharpness is influential to the flanging processibility of goods steel plate and ECP relative.
At first, if leave the finish to gauge support to surpassing 1.5 seconds in the time that runoff table begins to cool down from hot rolled strip, therefore the flanging processibility variation of goods steel plate, and the average relatively sharpness increase of ECP must be limited to them in 1.5 seconds.
In addition,, equally also can cause the flanging processibility variation of goods steel plate and the relative average sharpness of ECP to increase, therefore it must be limited to more than [finishing temperature-30] ℃ if cooling beginning temperature is lower than [finishing temperature-30] ℃.The reason of above-mentioned phenomenon is still not fully aware of, may reduce relevant with the crystal grain through hot rolled strip after the above-mentioned qualification by inference.
If the coiling temperature after the hot rolling surpasses 720 ℃, the oxide skin growing amount on the hot rolled strip is too much, cause the productivity of pickling process to reduce, thereby coiling temperature is preferably below 720 ℃.
After hot rolling is intact, according to a conventional method steel band is carried out pickling, cold rolling and recrystallization annealing.
Carry out secondary cold-rolling after the recrystallization annealing.
During secondary cold-rolling, by following (1) the defined mean strain speed of formula (SR) if be lower than 12.4S
-1, then the average relatively sharpness of ECP is excessive, thereby with the following 12.4S that is defined as of mean strain speed
-1
R in the formula: draft (-)
R: working roll radius (mm)
T: input side thickness of slab (mm)
V: working roll circumferential speed (m/min)
The draft of secondary cold-rolling (r) is easy to generate stress corrosion cracking if be lower than 0.7%, and jar undercapacity, therefore will be defined as 0.7% down, otherwise, if draft surpasses 60%, then steel plate too hardens, and it is poor that flanging processibility and DWI processing change, so will be defined as 60% on it.
When on steel plate of the present invention, carrying out surface-coated, coating method is unrestricted, that is to say, steel plate for tanks that constitutes by two parts and the common any surface application methods that adopts of welding steel plate for tanks, no matter be zinc-plated, nickel plating, after special base treatment as thin as a wafer tin of plating, or the method for pasting the polymer organic film, all can obtain good effect.
The system jar method of steel of the present invention is described below.
When steel of the present invention is used to make the jar that is made of two parts, can adopt the inferior any system jar method in processing method of DWI processing method and multistage.In addition, when being used to make the jar that constitutes by three parts, the direction of the plate cutting of steel of the present invention is unrestricted, can adopt Orthogonal Method (the axial rectangular plate cutting method of the rolling direction of steel plate and tank body), reverse method (the plate cutting method of the rolling method of steel plate and the axially parallel of tank body) and any plate cutting method of the two blended.
In addition, also can bring into play effect for glueing joint a jar steel of the present invention.
Below, further specify the present invention by embodiment.
Embodiment 1
With the steel that the converter melting has chemical ingredients shown in the table 1, treat the slab cool to room temperature after, reheat is to 1000-1290 ℃, being hot rolled to thickness of slab with 800-950 ℃ finishing temperature is 3.0mm.Hot rolled strip leaves finish to gauge support 0.4-1.9 to begin after second to cool off on runoff table, batches subsequently, pickling, cold rolling, continuous annealing, secondary cold-rolling to thickness of slab reach 0.17mm, plates the tin with as thin as a wafer at last.
The aging index that has the steel plate of tin coating as thin as a wafer that obtains like this, average relatively sharpness, anti-stress-corrosion crack performance, flanging processing characteristics, lug and the panel intensity of ECP have been shown in the table 2.
As shown in table 1 and table 2, sample 1-6 is within the scope of the present invention, and the sample 7-10 that enumerates as a comparative example is outside scope of the present invention.The chemical ingredients C of sample 7 and Ti are outside the scope of the invention, and aging index and relative average sharpness are also outside scope.The chemical ingredients of sample 8 is in the scope of the invention, but sharpness does not meet scope of the present invention.The sharpness of sample 9 is beyond the scope of the invention.The Ti content of sample 10 and aging index are all outside the scope of the invention.
In table 1 and table 2, exceed scope of the present invention numerical value in addition and be marked with underscore.In addition, qualified usefulness zero is represented, defective usefulness * expression.
The following describes evaluation to the test-results of each sample character.
The evaluation of anti-stress-corrosion crack performance, adopt with tension specimen in normal temperature, atmosphere with 10
-6S
-1The tension set E0 of rate of straining when stretching with the tension specimen of same test portion in 80 ℃ corrosion promotion liquid with identical rate of straining tensile tension set E
1Ratio E
1/ E
0E
1/ E
00.90 above person is qualified, is defective less than 0.90.
To the evaluation of flanging processing characteristics, employing is processed up to disrumpent feelings working modulus takes place with the flanging that simulates that the flanging forming mill carries out welded tank.This working modulus is being qualified more than 9.0%, is defective less than 9.0%.
The evaluation of lug is to be processed into cup-shapedly with the deep-draw processing machine, and with the difference of the center line average of the center line average of the crest of lug and the trough center line average divided by trough, institute's value is represented with percentage ratio.The lug rate is being qualified below 3.5%, and it is defective surpassing 3.5%.
The evaluation of panel intensity connects following described carrying out.At first, make tank body with the linear slit welding machine,, make its temporary transient air-tight state that forms at the seal liner that crimping rubber in the two ends of tank body is made, then with the vacuum pump air in the drain tank at leisure, measure and produce plate and charge into the poor of the external pressure of (because external pressure and in tank body, clamp-on) moment and interior pressure.Plate intensity is 2.157 * 10
5Pa (2.20kg/cm
2) above be qualified, be lower than 2.157 * 10
5Pa is defective.
Table 1
| Try sample numbering | Chemical ingredients (weight %) | ||||||||
| C | Mn | P | S | Sol.Al | N | B | Other | ||
| The present invention | 1 | 0.0015 | 0.08 | 0.006 | 0.007 | 0.002 | 0.0011 | 0.0004 | - |
| 2 | 0.0010 | 0.11 | 0.007 | 0.009 | 0.045 | 0.0052 | 0.0039 | - | |
| 3 | 0.0007 | 0.21 | 0.012 | 0.014 | 0.011 | 0.0015 | 0.0001 | Nb:0.0038 | |
| 4 | 0.0008 | 0.21 | 0.014 | 0.012 | 0.037 | 0.0024 | 0.0004 | Nb:0.0287 | |
| 5 | 0.0006 | 0.40 | 0.035 | 0.025 | 0.016 | 0.0021 | 0.0006 | Ti:0.0039 | |
| 6 | 0.0005 | 0.30 | 0.033 | 0.026 | 0.095 | 0.0024 | 0.0014 | Ti:0.0186 | |
| Outside the present invention | 7 | 0.0016 | 0.17 | 0.006 | 0.007 | 0.030 | 0.0066 | - | Ti:0.0635 |
| 8 | 0.0006 | 0.18 | 0.008 | 0.010 | 0.018 | 0.0021 | 0.0005 | - | |
| 9 | 0.0006 | 0.30 | 0.035 | 0.025 | 0.016 | 0.0021 | - | Ti:0.0039 | |
| 10 | 0.0005 | 0.30 | 0.033 | 0.026 | 0.095 | 0.0024 | 0.0011 | Ti:0.0711 | |
Table 2
| Try sample numbering | Time is imitated index (MPa) | Average relatively sharpness | Stress corrosion cracking | The flanging processibility | Lug | The plate strength | Comprehensive evaluation | |
| The present invention | 1 | 28 | 0.31 | ○ | ○ | ○ | ○ | ○ |
| 2 | 21 | 0.33 | ○ | ○ | ○ | ○ | ○ | |
| 3 | 26 | 0.24 | ○ | ○ | ○ | ○ | ○ | |
| 4 | 19 | 0.22 | ○ | ○ | ○ | ○ | ○ | |
| 5 | 25 | 0.11 | ○ | ○ | ○ | ○ | ○ | |
| 6 | 17 | 0.46 | ○ | ○ | ○ | ○ | ○ | |
| Outside this development is bright | 7 | 13 | 0.91 | × | × | × | ○ | × |
| 8 | 30 | 0.88 | × | ○ | ○ | × | × | |
| 9 | 27 | 0.88 | × | × | × | × | × | |
| 10 | 14 | 0.65 | × | ○ | ○ | ○ | × |
Embodiment 2
The steel that has chemical ingredients shown in the table 3 with the converter melting,---be finishing temperature, finish to gauge thickness of slab, leave the finish to gauge support to the time that on runoff table, begins to cool down (cooling time opening), cooling beginning temperature and coiling temperature---by creating conditions shown in the table 4 and carry out hot rolling from the hot-rolled steel band, carry out pickling, cooling, continuous annealing then, carry out secondary cold-rolling by mean strain speed shown in the table 4 and secondary cold-rolling draft, until thickness of slab is 0.20mm, zinc-plated at last.
The aging index of the tin plate that obtains is like this listed in the table 4 in the lump with relative average sharpness, anti-stress-corrosion crack performance, flanging processibility, lug and the compressive strength of ECP.
As shown in table 3, the chemical ingredients of sample 11-18 within the scope of the invention, sample 19-22 is a steel that enumerate as a comparative example, beyond the scope of the invention.The Ti of the Mn of the C of the C of sample 19 and Ti, sample 20, S and N, sample 21, P, sour molten Al and sample 22 is respectively outside chemical ingredients scope of the present invention.
As shown in table 4, sample 19-22 creates conditions also outside scope of the present invention.The aging index of sample 19, the cooling time opening of sample 20, cooling beginning temperature, mean strain speed, aging index, average relatively sharpness, the finishing temperature of sample 21, mean strain speed, secondary cold-rolling draft, sharpness, and the mean strain speed of sample 22, secondary cold-rolling draft, aging index, sharpness, inconsistent with scope of the present invention respectively.
Test and the evaluation thereof carried out for the performance of each sample are described below.
The evaluation of anti-stress-corrosion crack performance adopts the method identical with embodiment 1 to carry out.The evaluation of flanging processing characteristics is the opening end deburring with the DWI tank body, uses flanging workability test machine then, and one side is inserted opening end with conical punch, and one side is expanded the test of opening end diameter, estimates with the working modulus before the generation fracture.Working modulus is qualified 9.0% above person, is defective less than 9.0%.
The evaluation employing of lug and embodiment 1 identical method is carried out.
The evaluation of compressive strength is, make the tank body of DWI steel plate for tanks, in the stove of dry atmosphere, be equivalent to the thermal treatment of coating, drying operation, the seal liner made from rubber seals the tank body opening then, in tank body, import pressurized air at leisure, produce the emergent pressure of warpage at the bottom of obtaining jar, estimate with this.Emergent pressure is 7.355 * 10
5Pa (7.5kg/cm
2) above person is qualified, is lower than 7.355 * 10
5Pa person is defective.
In table 3 and table 4, the numerical value that exceeds outside the present invention is marked with underscore.In addition, eligible is represented with symbol zero, and is underproof with symbol * expression.Table 3
| Try sample numbering | Chemical ingredients (weight %) | ||||||||
| C | Mn | P | S | Dissolving Al | N | B | Other | ||
| The present invention | 11 | 0.0009 | 0.12 | 0.005 | 0.005 | 0.031 | 0.0011 | 0.0003 | - |
| 12 | 0.0007 | 0.22 | 0.016 | 0.015 | 0.014 | 0.0022 | 0.0036 | - | |
| 13 | 0.0006 | 0.24 | 0.018 | 0.012 | 0.027 | 0.0006 | 0.0002 | Nb:0.0039 | |
| 14 | 0.0004 | 0.14 | 0.008 | 0.011 | 0.005 | 0.0086 | 0.0007 | Nb:0.0294 | |
| 15 | 0.0010 | 0.18 | 0.007 | 0.008 | 0.025 | 0.0008 | 0.0006 | Ti:0.0041 | |
| 16 | 0.0008 | 0.18 | 0.010 | 0.013 | 0.021 | 0.0046 | 0.0020 | Ti:0.0223 | |
| 17 | 0.0006 | 0.19 | 0.009 | 0.011 | 0.018 | 0.0048 | 0.0005 | Ti:0.0203 | |
| 18 | 0.0005 | 0.21 | 0.011 | 0.010 | 0.024 | 0.0037 | 0.0009 | Ti:0.0229 | |
| Outside the present invention | 19 | 0.0016 | 0.17 | 0.006 | 0.007 | 0.030 | 0.0049 | - | Ti:0.0825 |
| 20 | 0.0033 | 0.25 | 0.014 | 0.067 | 0.008 | 0.0127 | 0.0012 | - | |
| 21 | 0.0007 | 0.41 | 0.063 | 0.011 | 0.114 | 0.0065 | - | Ti:0.0045 | |
| 22 | 0.0009 | 0.12 | 0.005 | 0.005 | 0.031 | 0.0051 | 0.0008 | Ti:0.0607 | |
Table 4
| Create conditions | Test-results | Comprehensive evaluation | |||||||||||||
| Specimen coding | Hot rolling finishing temperature (℃) | Finish to gauge thickness of slab (mm) | The cooling time opening (second) | Cooling beginning temperature (℃) | The hot rolling reeling temperature (℃) | Mean strain speed (s -1) | 2 cold rolling drafts (%) | Aging index (MPa) | Average relatively sharpness | Stress corrosion cracking | The flanging processibility | Lug | Compressive strength | ||
| The present invention | 11 | 879 | 3.0 | 0.8 | 862 | 351 | 347.4 | 12 | 36 | 0.52 | ○ | ○ | ○ | ○ | ○ |
| 12 | 864 | 3.0 | 0.7 | 851 | 367 | 977.4 | 37 | 24 | 0.55 | ○ | ○ | ○ | ○ | ○ | |
| 13 | 901 | 3.0 | 1.1 | 879 | 675 | 1676.6 | 46 | 22 | 0.44 | ○ | ○ | ○ | ○ | ○ | |
| 14 | 815 | 2.4 | 0.4 | 851 | 473 | 1256.8 | 35 | 18 | 0.46 | ○ | ○ | ○ | ○ | ○ | |
| 15 | 911 | 3.0 | 1.1 | 890 | 612 | 555.9 | 35 | 24 | 0.30 | ○ | ○ | ○ | ○ | ○ | |
| 16 | 863 | 2.7 | 0.5 | 858 | 660 | 1622.7 | 35 | 25 | 0.62 | ○ | ○ | ○ | ○ | ○ | |
| 17 | 870 | 3.0 | 0.6 | 858 | 642 | 844.2 | 35 | 18 | 0.17 | ○ | ○ | ○ | ○ | ○ | |
| 18 | 906 | 3.0 | 0.6 | 894 | 336 | 630.1 | 35 | 19 | 0.19 | ○ | ○ | ○ | ○ | ○ | |
| Outside the present invention | 19 | 908 | 3.0 | 1.0 | 887 | 550 | 188.7 | 35 | 14 | 0.35 | × | × | × | ○ | × |
| 20 | 891 | 3.0 | 1.7 | 858 | 476 | 12.0 | 35 | 13 | 0.89 | × | × | × | ○ | × | |
| 21 | 807 | 3.0 | 1.5 | 825 | 613 | 11.7 | 0.5 | 21 | 0.93 | × | × | × | × | × | |
| 22 | 893 | 3.0 | 1.2 | 866 | 619 | 12.2 | 65 | 13 | 0.98 | × | × | ○ | ○ | × | |
Industrial applicability
The present invention can be used for that thickness of slab is very thin, lug, eck processibility, flanging processibility and jar intensity that can guarantee to stipulate and have strong anti-stress-corrosion crack performance, the steel plate for tanks that constitutes by two parts and the steel plate for tanks that constitutes by three parts.
Claims (4)
1. the steel plate for tanks that has strong anti-stress-corrosion crack performance, in weight % contain below the C:0.0015%, Mn:0.05-0.40%, below the P:0.06%, below the S:0.06%, below the solvable Al:0.10% of acid, below the N:0.0100%, surplus is iron and unavoidable impurities; It is characterized in that having the aging index that is not less than 15MPa, the thickness of slab centre is not more than 0.85 at a distance of the average relatively sharpness that is no less than the electron channelling pattern that 20 crystal grain measure more than the 50 μ m each other.
2. the described steel plate for tanks with strong anti-stress-corrosion crack of claim 1, also contain at least a following element:
Ti:3.4 * ([the weight % of N]-0.0010) % is above to below 0.06%; With
Ti:3.4 * ([the weight % of N]-0.0010) % is above to below 0.06%.
3. have the manufacture method of the steel plate for tanks of strong anti-stress-corrosion crack, it is characterized in that:
To contain the impurity that (weight %) C:0.0015% is following, Mn:0.05-0.40%, P:0.06% following, S:0.06% is following, sour solvable Al:0.10% is following, N:0.0100% is following, surplus is iron and can not keep away hot steel billet, be hot-rolled down to plate thickness more than the 2.0mm with the finishing temperature more than 810 ℃, then, leave at hot rolled strip behind the planishing stand of hot rolling unit in 1.5 seconds, by the temperature water-cooled on runoff table more than [finishing temperature-30] ℃, then it is batched, pickling, cold rolling, recrystallization annealing; With
Draft with 0.7-60% carries out secondary cold-rolling, makes by following (1) the defined mean strain speed of formula (SR) and is not less than 12.4S
-1,
Aging index more than 15MPa, to the thickness of slab centre each other at a distance of the average relatively sharpness that is no less than the electron channelling pattern that 20 crystal grain measure more than the 50 μ m for being not more than 0.85;
In the formula, r: draft (-),
R: working roll radius (mm),
T: input side thickness of slab (mm),
V: working roll circumferential speed (m/min).
4. the described manufacture method with steel plate for tanks of strong anti-stress-corrosion crack performance of claim 3, also further contain at least a following element:
Ti:3.4 * ([the weight % of N]-0.0010) % is above to below 0.06; With
Nb:6.6 * ([the weight % of N]-0.0010) % is above to below 0.06.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP186267/93 | 1993-07-28 | ||
| JP18626793 | 1993-07-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1114113A CN1114113A (en) | 1995-12-27 |
| CN1043904C true CN1043904C (en) | 1999-06-30 |
Family
ID=16185302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94190649A Expired - Fee Related CN1043904C (en) | 1993-07-28 | 1994-07-26 | Steel sheet of high stress-corrosion-cracking resistance for cans and method of manufacturing the same |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0662523B1 (en) |
| KR (1) | KR0179419B1 (en) |
| CN (1) | CN1043904C (en) |
| DE (1) | DE69418172T2 (en) |
| WO (1) | WO1995004166A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2739581B1 (en) * | 1995-10-06 | 1997-10-31 | Lorraine Laminage | PROCESS FOR MANUFACTURING A METAL BOX OF THE BEVERAGE BOX TYPE |
| DE10247998B4 (en) * | 2002-10-15 | 2004-07-15 | Thyssenkrupp Stahl Ag | Process for producing a particularly well deformable cold-rolled steel strip or sheet |
| KR20070086712A (en) * | 2005-03-24 | 2007-08-27 | 제이에프이 스틸 가부시키가이샤 | Flexible sheet steel for can and process for production the same |
| CN101880821B (en) * | 2010-06-11 | 2012-08-15 | 武汉钢铁(集团)公司 | Steel-aluminum compound hot rolled steel with tensile strength of 280MPa and production method thereof |
| EP2650396B1 (en) | 2010-12-06 | 2018-11-07 | Nippon Steel & Sumitomo Metal Corporation | Steel sheet for bottom covers of aerosol cans and method for producing same |
| CN103045937A (en) * | 2012-12-14 | 2013-04-17 | 宝山钢铁股份有限公司 | Secondary cold rolled steel and production method thereof |
| JP6052412B2 (en) * | 2013-07-17 | 2016-12-27 | Ｊｆｅスチール株式会社 | Steel plate for can and manufacturing method thereof |
| BR112017017475B1 (en) | 2015-02-26 | 2021-08-10 | Jfe Steel Corporation | STEEL SHEET FOR CROWN TYPE COVER, METHOD FOR PRODUCTION OF STEEL SHEET FOR CROWN TYPE COVER AND CROWN TYPE COVER |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63203721A (en) * | 1987-02-18 | 1988-08-23 | Kobe Steel Ltd | Production of hot rolled steel sheet having excellent hydrogen induced cracking resistance and stress corrosion cracking resistance |
| JPH01306527A (en) * | 1988-06-01 | 1989-12-11 | Toyo Kohan Co Ltd | Production of hard steel sheet having small anisotropy |
| JPH03285046A (en) * | 1990-03-30 | 1991-12-16 | Kawasaki Steel Corp | Manufacture of steel sheet for three-piece can and three-piece can |
| JPH05117807A (en) * | 1991-10-30 | 1993-05-14 | Kawasaki Steel Corp | Manufacture of steel strip for can of food |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6126756A (en) * | 1984-07-17 | 1986-02-06 | Kawasaki Steel Corp | Dead soft steel sheet having high suitability to chemical conversion treatment |
| EP0421087B1 (en) * | 1989-08-09 | 1994-11-30 | KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. | Method of manufacturing a steel sheet |
-
1994
- 1994-07-26 CN CN94190649A patent/CN1043904C/en not_active Expired - Fee Related
- 1994-07-26 DE DE69418172T patent/DE69418172T2/en not_active Expired - Fee Related
- 1994-07-26 EP EP94921814A patent/EP0662523B1/en not_active Expired - Lifetime
- 1994-07-26 KR KR1019950700994A patent/KR0179419B1/en not_active IP Right Cessation
- 1994-07-26 WO PCT/JP1994/001226 patent/WO1995004166A1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63203721A (en) * | 1987-02-18 | 1988-08-23 | Kobe Steel Ltd | Production of hot rolled steel sheet having excellent hydrogen induced cracking resistance and stress corrosion cracking resistance |
| JPH01306527A (en) * | 1988-06-01 | 1989-12-11 | Toyo Kohan Co Ltd | Production of hard steel sheet having small anisotropy |
| JPH03285046A (en) * | 1990-03-30 | 1991-12-16 | Kawasaki Steel Corp | Manufacture of steel sheet for three-piece can and three-piece can |
| JPH05117807A (en) * | 1991-10-30 | 1993-05-14 | Kawasaki Steel Corp | Manufacture of steel strip for can of food |
Also Published As
| Publication number | Publication date |
|---|---|
| KR0179419B1 (en) | 1999-02-18 |
| DE69418172T2 (en) | 1999-12-02 |
| EP0662523A1 (en) | 1995-07-12 |
| CN1114113A (en) | 1995-12-27 |
| DE69418172D1 (en) | 1999-06-02 |
| EP0662523B1 (en) | 1999-04-28 |
| KR950703660A (en) | 1995-09-20 |
| WO1995004166A1 (en) | 1995-02-09 |
| EP0662523A4 (en) | 1995-12-13 |
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