CN1888118A - Cold rolled strip steel for shadow mask and its making process - Google Patents
Cold rolled strip steel for shadow mask and its making process Download PDFInfo
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- CN1888118A CN1888118A CNA2005100274002A CN200510027400A CN1888118A CN 1888118 A CN1888118 A CN 1888118A CN A2005100274002 A CNA2005100274002 A CN A2005100274002A CN 200510027400 A CN200510027400 A CN 200510027400A CN 1888118 A CN1888118 A CN 1888118A
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- shadow mask
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- rolled strip
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
- H01J9/142—Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/06—Screens for shielding; Masks interposed in the electron stream
- H01J29/07—Shadow masks for colour television tubes
Abstract
The present invention is one kind of cold rolled strip steel for shadow mask and its making process. The making process of the cold rolled strip steel includes the following steps: smelting; casting; hot rolling with finishing temperature of 880-900 deg.c and winding temperature of 510-610 deg.c; acid pickling and cold rolling; cutting edge and eliminating edge faults; continuous annealing at 675-695 deg.c in the soaking duration of 20-35 s and flattening. The present invention has excellent product performance, high production efficiency and low production cost.
Description
Technical field
The present invention relates to a kind of used for color picture tube band steel for shadow mask and manufacture method thereof, particularly the control techniques of the control of cold rolled strip steel for shadow mask material capability and surface longitudinal striped and plate shape.
Background technology
Chinese patent ZL01113107.1 provides a kind of method with once cold rolling and continuous annealing to produce band steel for shadow mask, has overcome the shortcoming of international monopoly (application number WO96/13618):
From chemical ingredients, the higher poor-performing that makes final band steel for shadow mask of carbon content, the adding of small amount of N b is not enough to the carbon of steel all fixing, and its ageing resistance performance is obviously improved, though can improve the ageing resistance performance afterwards and increase Nb content, but simultaneously unfavorable to magnetic property again, and production cost increases;
From production technique, the simple steel grade continuous casting steel billet in the steel-making continuous casting process that adds Nb ftractures easily, and it is very responsive to hot-rolled process parameter, the recrystallization temperature of final shadow mask finished product is improved, the user must increase substantially annealing temperature, increases energy consumption, and the rising of temperature will cause shadow mask annealing back wooden dipper song easily, plate shape is worsened, and bonding defect is also corresponding during high temperature annealing increases.
The production technique that Chinese patent ZL01113107.1 provides is simple, and productivity obviously improves.This patented technology adopts ultra low-carbon steel (pure iron) or add a spot of strong carbide forming element Ti or Ti and Nb in ultra low-carbon steel, it is the IF steel, make carbon wherein mainly exist with the form of carbide, reduce the dissolved carbon content in the steel significantly, improved its ageing resistance performance, guaranteed press formability, particularly shaping uniformity; By to the appropriate design of chemical ingredients and the adjustment and the optimization of processing parameter, make the material capability of band steel for shadow mask and magnetic property satisfy service requirements.The band steel for shadow mask advantage that adopts this patent to produce is that material capability and properties for follow are good, production technique is simple, to compare production cost low with traditional secondary cold-rolling band steel for shadow mask, but also there is significant disadvantages in this patent: at first, the chemical ingredients scope of this patent is also not ideal, facts have proved, some element must strictly be controlled, for example C, Mn, Ti, Al, Nb, otherwise material and processing performance have very big fluctuation, influence the user and use, some element is O and then too strictness of S for example, causes the obvious rising of production cost; Secondly, in this patent production technique not to the key process technology parameter of remarkably influenced band steel for shadow mask material capability, as the hot rolling slab Heating temperature, finishing temperature, continuous annealing temperature and time etc. is controlled, perhaps unreasonable to some technical data control, for example coiling temperature and smooth unit elongation etc., particularly not to the parameter of the flattening process of remarkably influenced surface quality and plate shape, for example smooth work roll crown, surfaceness, smooth tension force, rolling load and bending roller force etc. are optimized and strict control, and the as easy as rolling off a log generation longitudinal stripe in band steel for shadow mask surface produced of flattening technological parameter routinely, and the limit wave is serious, surfaceness can not meet the demands, these defectives have not only greatly influenced outward appearance, and influence client's normal use.
Summary of the invention
The object of the present invention is to provide a kind of band steel for shadow mask and manufacture method thereof of once cold rolling, the requirement that feasible band steel for shadow mask appearance of producing and performance can both satisfy the user.To significantly improve the material capability and the properties for follow of cold rolled strip steel for shadow mask for this reason, enhance productivity and logical plate stability, reduce production costs, and be easy to generate the problem of longitudinal stripe and limit wave, a kind of control techniques is provided at the cold rolled strip steel for shadow mask surface.
For achieving the above object, the present invention adopts following technical proposals: cold rolled strip steel for shadow mask, and its composition weight percent is:
C≤0.002 is preferably C≤0.0017
Ti 0.035-0.05
Mn 0.10-0.25 is preferably 0.15～0.25
Al 0.03-0.06
Cr 0.002-0.03
Si ≤0.03
N ≤0.003
P ≤0.012
S ≤0.01
O ≤0.004
Surplus Fe and unavoidable impurities.
The manufacture method of cold rolled strip steel for shadow mask of the present invention comprises the steps,
A. smelt, casting, hot rolling, 880～900 ℃ of hot rolling finishing temperatures, 510～610 ℃ of coiling temperatures;
B. pickling and cold-rolling;
C. prepare unit and cut edge, the excision limit is split, equilateral defective of burr;
D. continuous annealing, the heating zone of continuous annealing, the temperature control of soaking zone plate are between 675～695 ℃, and soaking time is 20～35s;
E. smooth, it is smooth to adopt two-shipper frame six roller levelling machines to do, and the working roll roller directly is 410～460mm, and work roll crown is 0.12～0.24mm; One frame rolling load is 9,000～12,000KN, and two frame rolling loads are 6,000～8,000KN.
Further, work roll surface hardness is Hs 93～97, and the intermediate roll surface hardness is Hs 81～85;
Work roll surface is preferably handled through chromium plating after the electrical spark texturing again.
Work roll surface through the electrical spark texturing handle or further after chromium plating is handled average surface roughness (Ra) scope be 0.80～1.20 μ m, unit length (cm) peak value number (PC) is 130～170.
Two-shipper frame bending roller force is 300～500KN.
Two-shipper frame levelling machine inlet unit tension is controlled at 11～13kg/mm
2, centre and exporting unit's tension control are at 35～48kg/mm
2
Smooth unit elongation is 1.3～2.0%.
The processing parameter of aforementioned production method is optimized for hot-rolled process parameter in addition except that the hot rolling slab Heating temperature described in the ZL01113107.1 is that 1200-1250 ℃, cold rolling reduction are the 87-93%: hot rolling finishing temperature is that 880-900 ℃, hot rolling reeling temperature are 510-610 ℃.In addition, before continuous annealing, increase and prepare unit side cut flow process, be convenient to the logical plate of safety.Strictness control is also carried out in follow-up continuous annealing and flattening technological parameter, and main technologic parameters is as follows: annealing temperature and time are respectively 675-695 ℃ and 20-35s; Smooth work roll crown and roller directly are respectively 0.12-0.24mm and 410-460mm; Smooth roll surface roughness Ra and PC value are respectively: 0.80-1.20 μ m and 130-170/cm;
The present invention compares with patent ZL01113107.1 from the chemical ingredients angle, and following variation is arranged: one, the scope of C, Ti, Mn and Al is dwindled, thereby principal element obtains strict control, and the performance of band steel for shadow mask is more stable; Its two, do not add expensive Nb element, greatly reduce production cost; Its three, the scope of O and S is relaxed, and has reduced the cost of steel making working procedure.
The present invention compares with contrast patent ZL01113107.1 from technological angle, following variation is arranged: one, hot rolling finishing temperature and coiling temperature reduce, and scope is dwindled, help controlling the quality of hot rolling slab, improve the surface quality of pickling speed and finished product and greatly reduce production cost; Its two, the continuous annealing temperature decreases, temperature range diminishes, soaking time shortens, and this means that production rate has improved, and therefore, reduces continuous annealing temperature and soaking time and has not only reduced production cost, has also improved production efficiency and quality product; Its three, increase to prepare unit side cut flow process, can remove effectively strip edge portion defective (as the limit split, burr etc.), the logical plate security that has improved the security and the logical tray efficiency, particularly wide material of logical plate.They are four years old, also be most important, the invention provides a whole set of flattening process technical parameter, comprise smooth mode, smooth working roll roller footpath, work roll crown, smooth roller surface texturing and post processing mode and detail parameters such as surface hardness, surfaceness, smooth unit elongation, rolling load, tension force and bending roller force, make strip surface quality and strip shape quality significantly improve.
The band steel for shadow mask that adopts chemical ingredients that patent of the present invention provides and processing parameter to produce has good material capability and surface quality, the surface longitudinal striped obviously alleviates even eliminates, and plate shape is good, utilize the chemical ingredients and the processing parameter of this patent can also carry out the production of double chi band steel for shadow mask, as width is the band steel for shadow mask of 490mm, can only carry out single multiple length production if adopt the production technique of contrast patent ZL01113107.1, production efficiency is low, and lumber recovery is lower, and the technology that adopts this patent can be carried out double chi (being 490mm * 2) production, production efficiency is original 2 times, and lumber recovery is also brought up to more than 90% from original about 70%.
Control of the present invention and principle are as follows:
Adopt lower hot rolling finishing temperature and coiling temperature, the belt steel surface iron scale is reduced, just begin strict control surface quality from process upstream like this, the possible defective that makes the band steel generate in the hot rolling stage drops to minimum, dwindling of temperature range makes that also control is more accurate, helps the stable control of strip quality.
The present invention has increased preparation unit side cut flow process, this be because band steel for shadow mask in smooth operation production process, under the hightension condition, the defective of strip edge portion (for example burr and crackle) easily causes smooth broken belt, a kind of band steel for shadow mask intermediates of the present invention are being cut edge through CPL (coil of strip preparation unit) earlier before through CAPL (continuous annealing and smooth), the limit that operation produces before thoroughly removing is split and burr, broken belt when avoiding smooth under the hightension situation, thereby make band steel for shadow mask under bigger tension force and rolling load condition, more effectively improve strip surface quality, eliminate striped.
After preparing the unit side cut, band steel for shadow mask will pass through continuous annealing, its essence is that cold rolling post-treatment hardened band steel is carried out recovery annealing to be handled, thereby improve belt plate shape and weave construction, and part is eliminated work hardening, owing to be near near the recrystallization temperature of material, to carry out high-temperature reply annealing, therefore very responsive with the material capability of steel to annealing temperature, so the gentle soaking time of the plate of heating zone and soaking zone is the related parameter of continuous annealing process, facts have proved, these two temperature are high more favourable more to the control longitudinal stripe, but too high temperature can make band steel local area recrystallize forming core, local recrystallize takes place, even grain growth, this is unfavorable for the control of band steel for shadow mask finished product material capability, to the shadow mask after the etching again after second annealing the control of structure property also unfavorable, through experiment, for band steel for shadow mask of the present invention, between 675-695 ℃, soaking time is controlled at 20-35s with its continuous annealing process heating zone and the temperature control of soaking zone plate.Annealing temperature and time are to mate mutually, annealing temperature is low more and the time is short more, material does not reach the purpose of improving plate shape and material by high-temperature reply, on the contrary, the high more and overlong time of annealing temperature, though plate shape can better be improved, local recrystallize takes place in band steel easily, causes material inhomogeneous and worsen the etching performance of band steel for shadow mask.
After the continuous annealing processing, band steel for shadow mask enters very important smooth operation, and smooth main effect is as follows:
1. improve the intensity and the hardness of high-temperature reply annealing back shadow mask band steel;
2. improve plate shape, obtain good strip profile and flatness;
3. give belt steel surface suitable surface topography, comprise Ra, Rmax, Sm and Rsk etc.;
4. eliminate the various surface imperfection of band steel for shadow mask.
Based on the above-mentioned effect of levelling machine, the correlation parameter of necessary strict control levelling machine, comprise skin pass rolling power, each section tension force, the bending roller force of smooth mode, smooth unit elongation, smooth work roll crown, working roll roller footpath, surfaceness, surface treatment state, surface hardness and two-shipper frame, the mutual coupling of particularly back three technical parameters has determined the elimination situation of plate shape, surface topography, material capability and the surface imperfection of band steel for shadow mask finished product.Grope through commerical test repeatedly, obtain following smooth related process technical parameter:
The band steel is before smooth, each operation all may produce various surface imperfection, particularly roll marks, impression, scuffing etc., but steel strip surface defect can be eliminated or alleviate to certain depressing after being out of shape through two-shipper frame levelling machine, in order to ensure the improvement of strip surface quality and the control of surface topography, at 1.3-2.0%, and the smooth unit elongation of conventional hard material is far below 1.3% with elongation control.Find that through test will improve smooth unit elongation, rolling load, unit tension and bending roller force all must increase considerably, but excessive smooth unit elongation causes easily and produce unstablely, belt plate shape is poor, and smooth roller also will shorten work-ing life.Unit elongation is too small, and then the surfaceness of working roll is difficult to copy to belt steel surface, makes band steel roughness be difficult to reach requirement, and the surface imperfection that preceding operation is brought also is difficult to alleviate and eliminate;
The two-shipper frame levelling machine work roll crown that rolls band steel for shadow mask is 0.12-0.24mm.This convexity is more much bigger than the smooth work roll crown that rolls general steel grade, finds through test, for band steel for shadow mask of the present invention, if convexity is too high, surpass 0.24mm, be easy to generate middle wave, and convexity is too low, is lower than 0.12mm and then is easy to generate the limit wave, all is unfavorable for the control of plate shape;
Two-shipper frame levelling machine working roll roller directly is 410-460mm.The roller footpath is excessive, cause actual rolling load to increase, levelling machine CD-ROM drive motor power also will increase, otherwise unit elongation does not reach 1.3%, the roller footpath is too small, and actual rolling load is too small, and belt steel surface pattern and surface quality are difficult to control, the roughness of working roll can not copy to belt steel surface on request, and surface imperfection is difficult to eliminate.
Through repetition test and user's check, determined that two-shipper frame levelling machine working roll average surface roughness (Ra) is 0.80-1.20 μ m, unit length (cm) peak value number (PC) is 130-170.Smooth working roll Ra and PC value directly influence Ra, Rmax, Rsk and the Sm value of band steel for shadow mask finished product, therefore, working roll Ra and PC value must appropriateness, and surfaceness too senior general influences the border of shadow mask pit, too little vacuum tightness when then influencing band steel for shadow mask and vacuumizing before exposure.
Two-shipper frame levelling machine work roll surface is preferred after the electrical spark texturing to be handled through chromium plating.The working roll life-span after chromium plating is handled obviously prolongs, and helps improving and stablizing every index of control belt steel surface roughness;
Two-shipper frame levelling machine work roll surface hardness is Hs 93-97, and the intermediate roll surface hardness is Hs81-85.Roll surface hardness is too high or the surface hardness scope is little, and for example working roll Hs 95-97 then will shorten the work-ing life of roller, and requires the chromium plating amount to increase, and causes production cost to increase, and roll surface hardness is low excessively, and belt steel surface is easy to generate roll marks;
Two-shipper frame levelling machine inlet unit tension is controlled at 11-13kg/mm
2, centre and exporting unit's tension control are at 35-48kg/mm
2Overtension, broken belt is produced instability easily, and tension force is too small, and belt plate shape and surface quality are all bad;
The first frame rolling load is 9,000-12, and 000KN, the second frame rolling load is 6,000-8,000KN.Rolling load is excessive, and the band steel is easy to generate the limit wave, and force energy consumption increases, and rolling load is too small, and the roll surface roughness is difficult to copy to belt steel surface, and has to increase tension force in order to meet the requirements of smooth unit elongation, thereby has increased broken belt danger.
Two-shipper frame bending roller force is 300-500KN.Therefore bending roller force is too little, when easily producing the band steel for shadow mask of limit wave, particularly rolling broad, more is easy to generate the limit wave, a frame and two frame bending roller forces is controlled to the maximum capacity 300-500KN of equipment, and bending roller force is excessive, and capacity of equipment does not reach.
Control by above-mentioned a series of smooth related process technical parameter, the band steel for shadow mask that obtains has not only kept all advantages among the patent ZL01113107.1, production efficiency also is improved, production cost has also reduced, surface imperfection is effectively eliminated simultaneously, plate shape is good, and particularly the surface longitudinal striped almost completely disappears.
Embodiment
According to the processing parameter difference of invention, come content of the present invention is further specified below by embodiment.
The technological process of each case study on implementation is: continuous casting steel billet is heated to the hot rolling cogging temperature before hot rolling, after roughing, finish rolling and laminar flow cooling, batch, after 2-3 days room temperature cooling, pass through CDCM unit (pickling and cold continuous rolling) again, then cut edge through preparing unit again, and CAPL unit (continuous annealing and smooth), after subsurface defect and finishing procedures such as surface quality inspection, side cut and bundling are produced the band steel for shadow mask finished product.
Chemical ingredients sees Table 1, and the main technique technical parameter sees Table 2, and the quality actual achievement sees Table 3.
Table 1 embodiment and Comparative Examples chemical ingredients (wt%)
| The embodiment sequence number | C | Ti | Mn | Al | Cr | Si | N | P | S | O(％) | Surplus |
| 1 | 0.0008 | 0.035 | 0.22 | 0.030 | 0.011 | 0.012 | 0.002 | 0.008 | 0.008 | 0.0038 | Fe |
| 2 | 0.001 | 0.042 | 0.25 | 0.039 | 0.015 | 0.014 | 0.003 | 0.006 | 0.006 | 0.0028 | Fe |
| 3 | 0.0013 | 0.050 | 0.24 | 0.042 | 0.014 | 0.014 | 0.003 | 0.006 | 0.006 | 0.0028 | Fe |
| 4 | 0.0015 | 0.037 | 0.20 | 0.041 | 0.015 | 0.017 | 0.0012 | 0.006 | 0.007 | 0.0025 | Fe |
| 5 | 0.0014 | 0.040 | 0.10 | 0.060 | 0.021 | 0.019 | 0.0021 | 0.005 | 0.007 | 0.0040 | Fe |
| 6 | 0.0017 | 0.036 | 0.24 | 0.045 | 0.015 | 0.023 | 0.002 | 0.009 | 0.009 | 0.0038 | Fe |
| 7 | 0.002 | 0.039 | 0.15 | 0.051 | 0.030 | 0.010 | 0.0011 | 0.001 | 0.010 | 0.0027 | Fe |
| 8 | 0.0019 | 0.048 | 0.25 | 0.036 | 0.002 | 0.030 | 0.0021 | 0.012 | 0.005 | 0.0015 | Fe |
| Comparative Examples 1 | 0.0013 | 0.039 | 0.15 | 0.039 | 0.018 | 0.014 | 0.0025 | 0.007 | 0.0076 | 0.0014 | Fe |
| Comparative Examples 2 | 0.0012 | 0.023 | 0.16 | 0.033 | 0.018 | 0.013 | 0.0019 | 0.007 | 0.004 | 0.0013 | Fe |
| Comparative Examples 3 | 0.0005 | 0.007 | 0.20 | 0.031 | 0.010 | 0.013 | 0.0018 | 0.008 | 0.008 | 0.0013 | Fe |
The main technique technical parameter of table 2 embodiment and Comparative Examples
| The hot rolling soaking temperature (℃) | Hot rolling finishing temperature (℃) | The hot rolling reeling temperature (℃) | Cold rolling reduction (%) | Prepare unit and cut the limit | Continuous annealing unit heating zone and soaking zone plate temperature (℃) | Soaking time (S) | Smooth work roll crown (mm) | Smooth unit elongation (%) | One frame rolling load (KN) | Two frame rolling loads (KN) | Bending roller force (KN) | Levelling machine inlet tension force kg/mm 2 | Levelling machine intermediate tension kg/mm 2 | Levelling machine outlet tension force kg/mm 2 | Working roll Ra (μ m) | Working roll PC (individual/cm) | |
| 1 | 1200 | 880 | 510 | 87 | Want | 675 | 35 | 0.12 | 1.4 | 9,000 | 6,000 | 300 | 11 | 36 | 36 | 0.9 | 130 |
| 2 | 1220 | 890 | 610 | 89 | Want | 680 | 28 | 0.18 | 1.8 | 10,000 | 7,000 | 400 | 12 | 40 | 40 | 1.0 | 150 |
| 3 | 1250 | 900 | 570 | 90 | Want | 695 | 20 | 0.24 | 2.0 | 12,000 | 8,000 | 400 | 13 | 46 | 46 | 0.8 | 160 |
| 4 | 1210 | 883 | 540 | 87 | Want | 678 | 24 | 0.13 | 1.4 | 9,200 | 6,100 | 350 | 11 | 35 | 35 | 0.9 | 140 |
| 5 | 1225 | 891 | 575 | 90 | Want | 684 | 29 | 0.17 | 1.6 | 10,500 | 7,300 | 350 | 12 | 36 | 36 | 1.1 | 155 |
| 6 | 1245 | 899 | 590 | 93 | Want | 695 | 23 | 0.20 | 1.7 | 12,000 | 8,000 | 500 | 12 | 40 | 40 | 1.2 | 170 |
| 7 | 1210 | 891 | 605 | 91 | Want | 676 | 27 | 0.15 | 1.3 | 11,900 | 8,000 | 450 | 11 | 37 | 37 | 1.1 | 160 |
| 8 | 1230 | 898 | 530 | 87 | Want | 694 | 30 | 0.23 | 1.9 | 9,500 | 6,000 | 350 | 13 | 48 | 48 | 1.2 | 170 |
| Comparative Examples 1 | 1220 | 910 | 660 | 90 | Not | 670 | 37 | - | 0.9 | - | - | - | - | - | - | - | - |
| 2 | 1210 | 915 | 705 | 90 | Not | 675 | 37 | - | 0.8 | - | - | - | - | - | - | - | - |
| 3 | 1190 | 920 | 670 | 90 | Not | 580 | 37 | - | 0.85 | - | - | - | - | - | - | - | - |
The quality actual achievement of table 3 embodiment and Comparative Examples
| Index | The finished product material capability | The surface longitudinal striped | Plate shape wave high (mm) | Surface roughness Ra (μ m) | The limit is split |
| Requirement | Satisfy service requirements | There is not obvious surface longitudinal striped | Wave height≤2.0 | 0.40-0.70 | Do not have |
| Embodiment 1 | Excellent | Basically eliminate | Limit wave 1.3 | 0.43 | Do not have |
| 2 | Excellent | Eliminate fully | Limit wave 1.0 | 0.50 | Do not have |
| 3 | Excellent | Eliminate fully | Middle wave 1.0 | 0.58 | Do not have |
| 4 | Excellent | Basically eliminate | Limit wave 1.0 | 0.42 | Do not have |
| 5 | Excellent | Eliminate fully | Limit wave 1.0 | 0.45 | Do not have |
| 6 | Excellent | Eliminate fully | Limit wave 1.5 | 0.55 | Do not have |
| 7 | Very | Basically eliminate | Limit wave 2.0 | 0.47 | Do not have |
| 8 | Very | Eliminate fully | Middle wave 2.0 | 0.60 | Do not have |
| Comparative Examples 1 | Excellent | *Obvious surface longitudinal striped is arranged | *2.5 | 0.50 | *Have |
| 2 | Excellent | *Obvious surface longitudinal striped is arranged | *3.0 | 0.40 | *Have |
| 3 | Excellent | *Obvious surface longitudinal striped is arranged | *3.0 | 0.59 | *Have |
Annotate: * is a nonconformance.
Adopt production technique of the present invention and parameter to obtain band steel for shadow mask surface longitudinal striped and obviously alleviate even eliminate, surfaceness can meet the demands, and quality is highly stable, and production efficiency improves greatly.And adopt the production technique of contrast patent ZL01113107.1, and because of its some processing parameter has strict control, the band steel for shadow mask plate shape of producing is relatively poor, exists surface longitudinal striped, limit defective such as to split, and surface roughness value is also unstable.
Claims (9)
1. cold rolled strip steel for shadow mask, its composition weight percent is:
C ≤0.002
Ti 0.035-0.05
Mn 0.10-0.25
Al 0.03-0.06
Cr 0.002-0.03
Si ≤0.03
N ≤0.003
P ≤0.012
S ≤0.01
O ≤0.004
Surplus Fe and unavoidable impurities.
2. cold rolled strip steel for shadow mask as claimed in claim 1 is characterized in that, C≤0.0017, Mn0.15～0.25 are by weight percentage.
3. the manufacture method of a cold rolled strip steel for shadow mask comprises the steps,
A. smelt, casting, hot rolling, 880～900 ℃ of hot rolling finishing temperatures, coiling temperature: 510～610 ℃;
B. pickling and cold-rolling;
C. prepare unit and cut edge, the excision limit is split, equilateral defective of burr;
D. continuous annealing, the heating zone of continuous annealing, the temperature control of soaking zone plate are between 675～695 ℃, and soaking time is 20～35s;
E. smooth, adopt two-shipper frame six roller levelling machines smooth, the working roll roller directly is 410～460mm, work roll crown is 0.12～0.24mm; One frame rolling load is 9,000～12,000KN, and two frame rolling loads are 6,000～8,000KN.
4. the manufacture method of cold rolled strip steel for shadow mask as claimed in claim 3 is characterized in that, work roll surface hardness is Hs 93～97, and the intermediate roll surface hardness is Hs 81～85.
5. the manufacture method of band steel for shadow mask as claimed in claim 3 is characterized in that, work roll surface is handled or further handled through chromium plating through the electrical spark texturing.
6. as the manufacture method of claim 3 or 5 described cold rolled strip steel for shadow mask, it is characterized in that, average surface roughness (Ra) scope is 0.80～1.20 μ m to work roll surface through electrical spark texturing processing or after further chromium plating is handled, and unit length (cm) peak value number (PC) is 130～170.
7. the manufacture method of cold rolled strip steel for shadow mask as claimed in claim 3 is characterized in that, two-shipper frame bending roller force is 300～500KN.
8. the manufacture method of cold rolled strip steel for shadow mask as claimed in claim 3 is characterized in that, two-shipper frame levelling machine inlet unit tension is controlled at 11～13kg/mm
2, centre and exporting unit's tension control are at 35～48kg/mm
2
9. the manufacture method of cold rolled strip steel for shadow mask as claimed in claim 3 is characterized in that, smooth unit elongation is 1.3～2.0%.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100274002A CN100430511C (en) | 2005-06-30 | 2005-06-30 | Cold rolled strip steel for shadow mask and its making process |
| DE112006001709T DE112006001709B4 (en) | 2005-06-30 | 2006-06-26 | Once cold-rolled steel strip for a shadow mask and method for its production |
| JP2008518599A JP5035806B2 (en) | 2005-06-30 | 2006-06-26 | Manufacturing method of primary cold-rolled shadow mask steel strip |
| RU2008103365/02A RU2381294C2 (en) | 2005-06-30 | 2006-06-26 | One time cold-rolled steel strip for shadow mask and method of its manufacturing |
| KR1020087002558A KR101049303B1 (en) | 2005-06-30 | 2006-06-26 | Single cold rolled strip steel for shadow mask and manufacturing method thereof |
| PCT/CN2006/001458 WO2007003109A1 (en) | 2005-06-30 | 2006-06-26 | Once-cold-rolled steel strip for shadow mask and its manufacture process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100274002A CN100430511C (en) | 2005-06-30 | 2005-06-30 | Cold rolled strip steel for shadow mask and its making process |
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| Publication Number | Publication Date |
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| CN1888118A true CN1888118A (en) | 2007-01-03 |
| CN100430511C CN100430511C (en) | 2008-11-05 |
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| CNB2005100274002A Active CN100430511C (en) | 2005-06-30 | 2005-06-30 | Cold rolled strip steel for shadow mask and its making process |
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|---|---|
| JP (1) | JP5035806B2 (en) |
| KR (1) | KR101049303B1 (en) |
| CN (1) | CN100430511C (en) |
| DE (1) | DE112006001709B4 (en) |
| RU (1) | RU2381294C2 (en) |
| WO (1) | WO2007003109A1 (en) |
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| TWI225101B (en) * | 1999-03-12 | 2004-12-11 | Toyo Kohan Co Ltd | Material for shadow mask, method for production thereof, shadow mask and image receiving tube |
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| JP2001329341A (en) * | 2000-05-18 | 2001-11-27 | Toyo Kohan Co Ltd | Shadow mask stock for color picture tube, shadow mask and color picture tube |
| WO2002000955A1 (en) * | 2000-06-26 | 2002-01-03 | Toyo Kohan Co.,Ltd. | Raw material for shadow mask for color image receiving tube |
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2005
- 2005-06-30 CN CNB2005100274002A patent/CN100430511C/en active Active
-
2006
- 2006-06-26 DE DE112006001709T patent/DE112006001709B4/en active Active
- 2006-06-26 WO PCT/CN2006/001458 patent/WO2007003109A1/en active Application Filing
- 2006-06-26 KR KR1020087002558A patent/KR101049303B1/en active IP Right Grant
- 2006-06-26 RU RU2008103365/02A patent/RU2381294C2/en active
- 2006-06-26 JP JP2008518599A patent/JP5035806B2/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2007003109A1 (en) | 2007-01-11 |
| RU2008103365A (en) | 2009-08-10 |
| RU2381294C2 (en) | 2010-02-10 |
| DE112006001709B4 (en) | 2011-01-27 |
| JP5035806B2 (en) | 2012-09-26 |
| KR20080038145A (en) | 2008-05-02 |
| CN100430511C (en) | 2008-11-05 |
| JP2008545060A (en) | 2008-12-11 |
| KR101049303B1 (en) | 2011-07-13 |
| DE112006001709T5 (en) | 2008-05-21 |
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