CN1237777A - Steel sheet for use as electrode-supporting frame member of color picture tube and manufacturing method thereof - Google Patents
Steel sheet for use as electrode-supporting frame member of color picture tube and manufacturing method thereof Download PDFInfo
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Abstract
A steel sheet has composition consisting of 0.003-0.10 wt.% C, not more than 1.0 wt.% Si, 0.05-1.5 wt.% Mn, not more than 0.10 wt.% P, not more than 0.02 wt.% S, 1.5-8.0 wt.% Cr, 0.003-0.10 wt.% Al, at least one of 0.08-0.40 wt.% Ti, 0.08-0.40 wt.% Nb and 0.08-0.40 wt.% V, optionally at least one of Cu up to 2.0 wt.%, Ni Up to 2.0 wt.%, 0.01-2.0 wt.% Mo, 0.01-2.0 wt.% W and 0.0003-0.0050 wt.% B and the balance being essentially Fe except inevibable impurities.
Description
The present invention relates to be used for being installed in the high strength steel disc of aperture grille formula color picture tube electrode-supporting frame device, also relate to the production method of this steel disc simultaneously.
Aperture grille formula color picture tube has the selecting electrode for colour element of being made by foil, the naked seam that wherein makes electron beam pass is formed at the relevant position of RGB on the phosphor screen (red, green, blue) phosphor matrix, so that utilize by this RGB phosphor of electron gun electrons emitted Shu Jifa.This selecting electrode for colour element extends to the electrode-supporting frame device and is supported by this electrode-supporting frame device.
Utilize electron beam scanning and the RGB phosphor on irradiation and the fluorescence excitation screen selectively, and then demonstration is by red, the green and blue coloured image of forming.Beam direction is subjected to Effect of Environmental such as earth magnetism easily, if electron beam is subjected to these effect of magnetic influence and produces deflection, then can not accurately reappear coloured image.The influence of factors such as earth magnetism can prevent by color picture tube is covered a magnetic shielding cover.
Be installed in the influence that electrode-supporting frame device in the color picture tube can be subjected to factors such as earth magnetism equally, thereby its material is very important for the performance of improving color picture tube.
The electrode-supporting frame device makes gap position on the selecting electrode for colour element that electron beam passes with guaranteeing to be formed in corresponding phosphor matrix accurate location, so that accurately electron beam is pointed to each RGB phosphor.If stretch to the selecting electrode for colour element of electrode-supporting frame device because factor affecting such as thermal expansion and out of position, just electron beam can not point to selected phosphor.The accurate reproduction that departs from meeting destruction coloured image of this electron beam.
The electrode-supporting frame device that is used to support the selecting electrode for colour element is made by the thick steel disc of 2～7mm, and it need be shaped so that the size of coupling color picture tube by reservation shape.The electrode-supporting frame device that is used for the small size picture tube is produced by drawing, the production that is used for the electrode-supporting frame device of large scale picture tube then normally utilizes in the corresponding four limit edges of frame steel disc is rolled or drawing, and the steel disc that will be shaped by welding is made frame shape then.At last, this electrode-supporting frame device is being carried out the stress relief annealing processing.
Selecting element for color, is to corrode the naked seam that makes electron beam pass with formation on the cold rolling steel disc of 0.08～0.15mm at thickness.Through the steel disc of corrosion be welded on be subjected in to the upper and lower part of the electrode-supporting frame device of extruding.After electrode member is fixed on this frame device, pressure is removed from this frame device.Therefore, owing to removing of pressure, the frame device just embodies the reaction force of this electrode member that stretches.Like this, electrode member is just together made with the frame device.
Then, handle through melanism with the frame device that electrode member integrates, so that the harmful effect that inhibition is produced by thermal radiation, secondary electron and dust etc.Handle by melanism, will on this frame device, form oxide-film.This oxide-film should be attached on the frame securely; Otherwise, peel off and the oxide particle that produces will be scattered within the color picture tube and significantly reduce the performance of this color picture tube by black oxide film.
In above-mentioned production process, after electrode member and frame apparatus integration were integrated, this frame device applied thereon and stands melanism under the condition in order to the bending stress of stretching electrode member and handle thermal cycle.Owing to stand the frame device of heat during melanism is handled and the stress of electrode member weakens, the tensile stress of electrode member also weakens.
Utilization applies tension force makes electrode member be stretched to the structure of frame device, and its purpose is that the tension force that passes through to be applied keeps the exact position of this electrode member.This tension force absorbs the elongation of electrode member and also eliminates color disorder, even also is like this when this electrode member is heated and owing to electron beam irradiation thermal expansion takes place.Yet, handle the generation that the tensile stress that is caused weakens the function that has reduced the frame device and usually causes color disorder by melanism.Especially, owing to the naked crack structure that makes electron beam pass is formed on the electrode member, so the influence that aperture grille formula color picture tube is vibrated easily.When tensile stress is reduced to a certain degree, electrode member will with the sound wave generation resonance from loud speaker, thereby cause color disorder.
When electrode member is heated under higher temperature, the frame device will produce thermal expansion.This thermal expansion also can cause color disorder.
This material for this reason, adopted the material of high chromium ferrite stainless steel, because can be resisted reducing of the required tensile stress of this frame device and have minimum thermal coefficient of expansion as the electrode-supporting frame device.But, use the ferrite stainless steel will cause the increase of color picture tube frame device production cost.
Existing inventor has proposed to adopt certain price to be lower than the stainless steel alloy of ferrite, and for example Japan Patent disclose in No. 67945/1996 communique such.The steel alloy that is proposed contain 0.01～1.0wt.% molybdenum and be no more than the copper of 2.0wt.% so as to improve room temperature and high temperature under tensile strength.Because this kind steel alloy only contains 3.0wt.% or is lower than the chromium of 3.0wt.%, so can utilize its to replace ferrite stainless steel as the lower cost materials of electrode-supporting frame device.
Point out in passing, have the trend of production large scale color picture tube at present.Therefore, in order to mate the size of color picture tube, it is big that selecting electrode for colour element and electrode-supporting frame device size also will become.Owing to the influence of tensile stress and the thermal expansion increase along with the frame plant bulk increases, so will produce massive electrode-supporting frame device inevitably so that bear reducing and thermal expansion of tensile stress.
Consider the above-mentioned mandatory attribute of electrode-supporting frame device, pressing for provides a kind of new material in order to produce the frame device, it is improved on intensity, thus be enough to make a kind of advanced person, have good rigidity and low cost, can weaken the frame device of tensile stress simultaneously hardly.
The present invention aims to provide this material, and its cost is low, has high strength, even also can reduce the tensile stress of selecting electrode for colour element after standing melanism processing thermal cycle hardly, is suitable for the making of electrode-supporting frame device.The purpose of this invention is to provide a kind of low-cost chromium steel sheet, it is in order to replace expensive ferrite stainless steel, and its intensity and rigidity can be superior, have the needed characteristic of electrode-supporting frame device.
The high strength steel disc that is used for the electrode-supporting frame device according to the present invention comprises one or more of vanadium of the niobium of titanium, 0.08～0.40wt.% of the aluminium of chromium, 0.003～0.10wt.% of the manganese of the carbon of 0.003～0.10wt.%, the silicon that is no more than 1.0wt.%, 0.05～1.5wt.%, the phosphorus that is no more than 0.10wt.%, the sulphur that is no more than 0.02wt.%, 1.5～8.0wt.% and 0.08～0.40wt.% and 0.08～0.40wt.%, and residue partly is essentially iron except that unavoidable impurities.This steel disc also can comprise one or more of following composition, i.e. following copper, following nickel, the molybdenum of 0.01～2.0wt.%, the tungsten of 0.01～2.0wt.% and the boron of 0.0003～0.0050wt.% of 2.0wt.% of 2.0wt.%.
The production process of steel disc is as follows: the slab with specific composition carries out hot rolling under 820～950 ℃ of finishing temperatures and 400～700 ℃ of coiling temperature; Steel band through hot rolling is carried out skin-pass carry out pickling then, or carry out pickling earlier and carry out skin-pass again.This steel disc can also following making: hot rolling has the slab of specific composition under 820～950 ℃ of finishing temperatures and 400～700 ℃ of coiling temperature, steel band through hot rolling is carried out pickling, carry out cold rolling to the steel band after the pickling, at last the steel band after cold rolling is annealed, then the steel band after the annealing is being carried out skin-pass.
Because the frame device makes the selecting electrode for colour element of the naked seam that electron beam passes mutually integrated with having, it is very responsive that this structure reduces the influence that produced to above-mentioned resonance in the tensile stress of loud speaker sound wave, so should have good magnetic and black film adhesiveness, and necessary tension force of the selecting electrode for colour element that will keep stretching to the base steel sheet as the steel disc of electrode-supporting frame device.
The frame device will be in the melanism processing procedure among the hot environment, be applied with the bending stress of stretching electrode member simultaneously on it.If steel disc lacks the intensity under the high temperature, then will in the frame device, produce stress and weaken.In view of the above, the present inventor has studied common cheaply steel disc, and it has fabulous magnetic and the black film good adhesion to the base steel sheet, and all has the necessary intensity of frame device under room temperature and high temperature.
The present inventor passes through the research to the various characteristicses such as thermal expansion, reinforcement and elevated temperature strength of ordinary steel, found that and in mild steel, add chromium, add in one or more and/or copper, nickel, molybdenum, tungsten and the boron in titanium, niobium and the vanadium one or more simultaneously, to significantly strengthen hardness of steel, and stand to increase when melanism is handled its elevated temperature strength at this steel.The increase of intensity has suppressed reducing of selecting electrode for colour element tensile stress under room temperature and the high temperature, thereby a kind of steel disc that is applicable to the frame device is provided, and it can reduce by the caused color disorder of its thermal expansion.
When adopting this new steel disc as the frame device materials of stretching electrode member, this frame device at high temperature shows enough intensity, thereby can suppress reducing of electrode member tensile stress when this electrode member stands in the production process thermal cycle.This steel disc also has magnetic, rigidity and the melanism that is suitable for the frame device.
Produce steel disc under the condition by the new method of proposition herein, also can give room temperature strength, rigidity and the solderability that this steel disc is applicable to frame device in the aperture grille formula color picture tube the elevated temperature strength except it is had.
Fig. 1 has illustrated the influence of chrome content to the ratio of electrode-supporting frame device thermal coefficient of expansion and selecting electrode for colour element thermal coefficient of expansion.
The novel steel disc that is used for aperture grille formula color picture tube electrode-supporting frame device comprises carbon, silicon, manganese, phosphorus, sulphur, chromium, aluminium, and is at least a as basic element in aluminium and titanium, niobium and the vanadium. This steel disc also can comprise at least a in copper, nickel, molybdenum, tungsten and the boron. The effect of these alloying elements will become clear through following explanation.
Carbon: 0.003～0.10wt.%
Carbon can increase the intensity of steel disc effectively as alloy material. Carbon is done can realize by addition is controlled at more than the 0.003wt.% the increase of intensity. Yet, too add carbon and can produce the harmful effect that reduces steel disc rigidity and solderability when surpassing 0.10wt.%.
Silicon: below the 1.0wt.%
Silicon adds in the steel as the deoxidation medium, and it also can improve steel disc intensity effectively. But, too add silicon and will cause the steel disc bad order when surpassing 1.0wt.%, also will cause the poor adhesion that is formed at black film on the steel disc.
Manganese: 0.05～1.5wt.%
Manganese is as the deoxidation medium and improve the intensity of steel disc. Because the stability of sulphur inevitable, that exist with manganese sulfide (MnS) form is added manganese and also can effectively be suppressed high-temperature embrittlement. Addition by control manganese can obviously be found out this effect more than 0.05wt.%. But, too add manganese and will reduce rigidity and the solderability of steel disc when surpassing 1.5wt.%.
Phosphorus: below the 0.10wt.%
Phosphorus can effectively improve steel disc intensity, but it is isolated by the grain boundary in the steel matrix easily.When steel disc comprises excessive phosphorus, this steel disc will have very big intensity of excursion and bad rigidity.For this reason, should control phosphorus content below 0.10wt.%, and be preferably in below the 0.04wt.%.
Sulphur: below the 0.02wt.%
Sulphur is a kind of harmful element, and it is present among the steel matrix with manganese sulfide (MnS) form and reduces the rigidity of steel disc.For this reason, preferably sulfur content being reduced to minimum below the 0.02wt.% may level.
Chromium: 1.5～8.0wt.%
Chromium is with carbide form dissolving or be deposited in the steel matrix, thereby but causes the increase of the elevated temperature strength of efficient hardening electrode member tensile stress.Add chromium and can also effectively reduce thermal expansion.For the color disorder that prevents that thermal expansion from causing, must adjust frame device thermal coefficient of expansion, make its 0.97 times less than the electrode member thermal coefficient of expansion.The color disorder that is produced by the thermal expansion of frame device can utilize the thermal coefficient of expansion that reduces the frame device and reduce.If the ratio of frame device thermal coefficient of expansion and electrode member thermal coefficient of expansion greater than 0.97, then can not reach practical function.
Consider the relation between the chromium content and thermal coefficient of expansion as shown in Figure 1, can be more than 1.5wt.% and the thermal coefficient of expansion of control frame device by control chromium addition.Yet, too add chromium and will be unfavorable for improving the steel disc cost when surpassing 8.0wt.% content, also can cause productivity ratio to reduce.
Aluminium: 0.003～0.10wt.%
Aluminium wherein inevitably contains nitrogen as deoxidation media and stable with aluminium nitride (AIN) form.The realization of this effect can be controlled at more than the 0.003wt.% by the addition that makes aluminium.Yet, too add aluminium and will cause the steel disc blemish and reduce the adhesiveness that is formed at black film on the steel disc when surpassing 0.10wt.%.
Titanium, niobium, vanadium: 0.08～0.40wt.% separately
These elements promote the deposition of carbide in the steel matrix and make the crystal grain minimum, increase necessary room temperature strength of electrode member tensile stress and elevated temperature strength thereby be improved as.At least a and its addition is in more than the 0.08wt.% can significantly find out these effects by adding in titanium, niobium and the vanadium.But, too add these elements and will cause bad rigidity and solderability when surpassing 0.40wt.%.
Copper: below the 2.0wt.%
Copper is the washability alloying element, and its dissolves or is deposited among the steel matrix, thereby strengthens room temperature strength and elevated temperature strength, causes the increase of electrode member tensile stress.Yet, too add copper and will cause bad rigidity and solderability when surpassing 2.0wt.%.
Nickel: below the 2.0wt.%
Nickel is the washability alloying element, and it can effectively prevent the high-temperature embrittlement by the copper generation.When nickel content is adjusted to copper content over half, can significantly find out the inhibitory action of nickel to high-temperature embrittlement.Because room temperature strength and elevated temperature strength can be strengthened by dissolving in steel matrix and nickel deposited, so add the tensile stress that nickel also can effectively increase electrode member.Yet nickel content preferably is adjusted at below the 2.0wt.%; Otherwise the excessive nickel of costliness that uses will increase the steel disc cost.
Molybdenum, tungsten: 0.01～1.0wt.% separately
Molybdenum and tungsten are the washability alloying element, and they dissolve with fine and closely woven carbide form or are deposited among the steel matrix, thereby strengthen room temperature strength and elevated temperature strength, cause the increase of electrode member tensile stress.More than 0.01wt.%, can significantly find out above-mentioned effect by control molybdenum or tungsten addition.Yet, too add molybdenum or tungsten and will improve the steel disc cost unfriendly and cause bad rigidity and solderability when surpassing 1.0wt.%.
Boron: 0.0003～0.0050wt.%
Boron is the washability alloying element, and it strengthens the grain boundary effectively so that improve steel band forging rolling performance and with inevitable nitrogen in the form stabilized steel matrix of boron nitride (BN).These effects can realize by the boron addition is controlled at more than the 0.0003wt.%, but will reach capacity during for 0.0050wt.% when boron content.
Steel with specific composition is carried out hot rolling and skin-pass.Steel band carries out pickling before or after skin-pass.Steel band after the pickling can carry out further cold rolling, anneals at last and then carries out skin-pass.
Hot rolling:
Mainly in finishing temperature steel is carried out hot rolling, this temperature is in its Ar just
3On the transition temperature so that make the crystal grain minimum.Preferably finishing temperature is controlled in 820～950 ℃ the scope.If finishing temperature is lower than 820 ℃, steel will carry out hot rolling in alpha phase zone.If finishing temperature is higher than 950 ℃, steel will carry out hot rolling in the γ phase region.In the above two kinds of cases, the crystal grain in the steel band is coarse after the hot rolling.
Steel band after the hot rolling coils at 400～700 ℃.The shape and the performance of coiling temperature effect steel band.If the coiling temperature is lower than 400 ℃, the gained steel band will have bad shape.Otherwise the coiling temperature that is higher than 700 ℃ will cause gained steel band insufficient strength and bad with seasonal pickling effect.
Cold rolling:
Can select to proceed cold rolling to steel band after the hot rolling.Although do not exist cold rolling significant limitation, preferably rolling rate be controlled at more than 40%.If less than 40% o'clock steel band is carried out cold rollingly in rolling rate, then crystal grain will roughening in annealing steps subsequently.
Annealing:
Cold rolling back steel band is being annealed under the temperature more than 650 ℃, and be in crystallization again and finish the district this moment.Yet, be higher than the generation that 950 ℃ annealing temperature will cause coarse crystal grain.By annealing, steel band is in and does not contain the not metallurgical structure of crystallization crystal grain.Because the said structure condition, the rigidity of the steel disc that obtains improves.If will contain the steel disc processing framing device of not crystallization grainiess, then be difficult to the shape that keeps required.
Skin-pass:
Utilize skin-pass with hot rolling or cold rolling after steel band be configured as flat pattern again.Preferably carry out skin-pass to guarantee flat pattern with about elongation more than 1%.Owing to introduced dislocation, carried out skin-pass with big elongation and will promote meticulous sedimental formation such as manganess carbide (MnC), tungsten carbide (WC) and copper.This meticulous deposit is as hindering the inhibitor that dislocation is moved.Therefore, by being shaped at steel disc, carrying out the elevated temperature strength that stress relief annealing can be improved this steel disc after welding and make the frame device.Yet excessive elongation can reduce the rigidity of the steel disc that obtains.For this reason, during the skin-pass preferably with elongation control below 7%.
Further specified below by example.
Each slab with composition shown in the table 1 carries out hot rolling under the condition of table 2 definition, the elongation with 1.5% carries out skin-pass, carries out pickling then.That steel band Nos.8 and 9 further carries out is cold rolling, annealing and carry out skin-pass with 1.5% elongation.
One experiment slice is defined as the No.5 among the JIS Z2201, and it is taken a sample and at room temperature carry out tension force experiment by the regulation of JIS Z2241 from each steel disc along rolling direction.Another experiment slice that blocks each steel band through 30 minutes stress relief annealings, at room temperature carries out the tension force experiment and carries out the tension force experiment by being defined under 450 ℃ the temperature of JIS Z2272 by the regulation of JIS Z2241 then under 550 ℃ temperature.Experimental result is as shown in table 3.
Use steel disc in table 1 example
| The steel disc numbering | Alloy composition and content (wt.%) | Annotate | ||||||||||||||
| Carbon | Silicon | Manganese | Phosphorus | Sulphur | Copper | Nickel | Chromium | Molybdenum | Tungsten | Aluminium | Boron | Titanium | Niobium | Vanadium | Table invention situation | |
| ????1 | ?0.031 | ?0.03 | ?0.30 | ?0.007 | ?0.012 | ?0.01 | ?0.02 | ?1.96 | ?0.42 | ?- | ?0.034 | ??- | ?0.16 | ??- | ??- | |
| ????2 | ?0.027 | ?0.02 | ?0.33 | ?0.010 | ?0.011 | ?0.02 | ?0.02 | ?3.36 | ??- | ?- | ?0.037 | ??- | ?0.16 | ??- | ?0.14 | |
| ????3 | ?0.016 | ?0.01 | ?0.49 | ?0.011 | ?0.008 | ?0.02 | ?0.04 | ?5.06 | ??- | ?- | ?0.043 | ??- | ?0.15 | ??- | ?0.09 | |
| ????4 | ?0.018 | ?0.01 | ?0.38 | ?0.008 | ?0.009 | ?0.01 | ?0.03 | ?7.62 | ??- | ?- | ?0.042 | ??- | ?- | ?0.19 | ??- | |
| ????5 | ?0.017 | ?0.02 | ?0.81 | ?0.011 | ?0.011 | ?0.03 | ?0.01 | ?3.41 | ?0.34 | ?- | ?0.023 | ?0.0006 | ?0.21 | ??- | ??- | |
| ????6 | ?0.018 | ?0.03 | ?0.46 | ?0.012 | ?0.013 | ?0.07 | ?0.02 | ?3.42 | ??- | ?0.28 | ?0.054 | ??- | ?0.23 | ??- | ??- | |
| ????7 | ?0.020 | ?0.01 | ?0.53 | ?0.013 | ?0.009 | ?0.03 | ?0.03 | ?3.39 | ??- | ?0.07 | ?0.035 | ??- | ?0.29 | ??- | ?0.10 | |
| ????8 | ?0.014 | ?0.02 | ?0.49 | ?0.006 | ?0.007 | ?0.14 | ?0.11 | ?3.86 | ?0.21 | ?- | ?0.037 | ??- | ?0.08 | ?0.11 | ??- | |
| ????9 | ?0.007 | ?0.63 | ?0.50 | ?0.029 | ?0.007 | ?0.02 | ?0.06 | ?3.83 | ?0.09 | ?0.03 | ?0.052 | ??- | ??- | ?0.21 | ?0.15 | |
| ????10 | ?0.013 | ?0.04 | ?0.62 | ?0.010 | ?0.006 | ?1.32 | ?1.18 | ?3.46 | ??- | ?- | ?0.039 | ?0.0015 | ?0.27 | ??- | ??- | |
| ????11 | ?0.086 | ?0.02 | ?0.29 | ?0.009 | ?0.008 | ?0.01 | ?0.02 | ?0.02 | ??- | ?- | ?0.042 | ??- | ?0.10 | ??- | ??- | Comparison example |
| ????12 | ?0.026 | ?0.01 | ?0.62 | ?0.015 | ?0.011 | ?0.03 | ?0.03 | ?1.11 | ??- | ?- | ?0.049 | ??- | ??- | ??- | ??- | |
| ????13 | ?0.020 | ?0.47 | ?0.40 | ?0.010 | ?0.007 | ?0.09 | ?0.06 | ?12.1 | ??- | ?- | ?0.015 | ??- | ?0.06 | ??- | ??- | |
| ????14 | ?0.056 | ?0.66 | ?0.68 | ?0.008 | ?0.008 | ?0.12 | ?0.10 | ?17.3 | ??- | ?- | ?0.027 | ??- | ??- | ??- | ??- | |
The working condition of each steel disc of table 2
| The steel disc numbering | The hot rolling stage | Cold rolling-annealing stage | Annotate | ||||
| Hot rolling | Thickness (mm) | Cold rolling | Continuous annealing | Thickness (mm) | |||
| Finishing temperature, ℃ | The coiling temperature, ℃ | Rolling rate, % | Annealing temperature, ℃ | ||||
| ????1 | ????920 | ????600 | ????4.5 | ????- | ?????- | ???- | Situation of the present invention |
| ????2 | ????900 | ????550 | ????4.5 | ????- | ?????- | ???- | |
| ????3 | ????860 | ????550 | ????4.5 | ????- | ?????- | ???- | |
| ????4 | ????840 | ????600 | ????4.5 | ????- | ?????- | ???- | |
| ????5 | ????900 | ????550 | ????4.5 | ????- | ?????- | ???- | |
| ????6 | ????900 | ????650 | ????4.5 | ????- | ?????- | ???- | |
| ????7 | ????900 | ????550 | ????4.5 | ????- | ?????- | ???- | |
| ????8 | ????880 | ????550 | ????6.0 | ????60 | ????880 | ???2.4 | |
| ????9 | ????880 | ????550 | ????6.0 | ????65 | ????850 | ???2.1 | |
| ????10 | ????900 | ????460 | ????4.5 | ????- | ?????- | ???- | |
| ????11 | ????880 | ????500 | ????4.5 | ????- | ?????- | ???- | Comparison example |
| ????12 | ????920 | ????600 | ????4.5 | ????- | ?????- | ???- | |
| ????13 | ????850 | ????680 | ????4.5 | ????- | ?????- | ???- | |
| ????14 | ????820 | ????630 | ????4.5 | ????- | ?????- | ???- | |
Table 3 is made the mechanical performance of steel disc
*The output intensity value is the intensity after the steel disc stress relief annealing.
| The steel disc numbering | The tension force experimental result | After the annealing * | Annotate | |||
| Output intensity (N/mm 2) | Tensile strength (N/mm 2) | Elongation % | Output intensity (N/mm 2) | Output intensity (N/mm in the time of 450 ℃ 2) | ||
| ????1 | ????386 | ????495 | ????29.4 | ????390 | ????274 | Situation of the present invention |
| ????2 | ????436 | ????514 | ????28.6 | ????445 | ????285 | |
| ????3 | ????413 | ????498 | ????32.4 | ????408 | ????312 | |
| ????4 | ????476 | ????551 | ????27.2 | ????501 | ????316 | |
| ????5 | ????436 | ????533 | ????28.1 | ????457 | ????327 | |
| ????6 | ????463 | ????566 | ????26.4 | ????465 | ????303 | |
| ????7 | ????435 | ????512 | ????30.8 | ????423 | ????294 | |
| ????8 | ????431 | ????507 | ????27.1 | ????463 | ????314 | |
| ????9 | ????452 | ????525 | ????25.6 | ????497 | ????348 | |
| ????10 | ????463 | ????539 | ????26.8 | ????521 | ????381 | |
| ????11 | ????274 | ????384 | ????37.4 | ????243 | ????138 | Comparison example |
| ????12 | ????237 | ????331 | ????40.3 | ????218 | ????131 | |
| ????13 | ????325 | ????453 | ????39.6 | ????321 | ????222 | |
| ????14 | ????338 | ????495 | ????33.8 | ????327 | ????242 | |
By table 2 as seen, satisfy the requirement that is used for color picture tube electrode-supporting frame device according to steel disc of the present invention.
On the contrary, steel disc Nos.11 and 12 all has bad strength character owing to chromium content few (promptly being respectively 0.05wt.% and 1.11wt.%) under room temperature and high temperature.As shown in Figure 1, the thermal coefficient of expansion of the frame device of being made by the steel disc that so lacks chrome content is higher than 0.97 times of selecting electrode for colour element thermal coefficient of expansion.Because these defectives, steel disc Nos.11 and 12 is not suitable for as the frame device materials.
Steel disc Nos.13 and 14 all has high strength under room temperature and high temperature.Yet these steel discs are expensive ferrite stainless steel, and its chromium content has exceeded the defined chromium content range of the present invention.
Above-mentioned steel disc according to the present invention is all demonstrating high strength under room temperature and high temperature after the stress relief annealing.Because it is minimum and can suppress the color disorder that caused by the thermal expansion of frame device that the tensile stress of its selecting electrode for colour element weakens degree, this steel disc is applicable to the electrode-supporting frame device of color picture tube.In addition, because chromium content is controlled at reduced levels, this steel disc price is lower than the ferromagnetism stainless steel substrates.Therefore, this steel disc is applicable to aperture grille formula color picture tube and shadow mask type colour tube.Have, this steel disc can fully satisfy the requirement for the color picture tube of large scale or high-definition television design again.
Claims (3)
1. the steel disc that is used for making color picture tube electrode-supporting frame device comprises one or more of vanadium of the niobium of titanium, 0.08～0.40wt.% of the aluminium of the chromium of the manganese of the carbon of 0.003～0.10wt.%, the silicon that is no more than 1.0wt.%, 0.05～1.5wt.%, the phosphorus that is no more than 0.10wt.%, the sulphur that is no more than 0.02wt.%, 1.5～8.0wt.%, 0.003～0.1wt.% and 0.08～0.40wt.% and 0.08～0.40wt.%; This steel disc also can comprise one or more of following composition, be the following copper of 2.0wt.%, following nickel, the molybdenum of 0.01～2.0wt.%, the tungsten of 0.01～2.0wt.% and the boron of 0.0003～0.0050wt.% of 2.0wt.%, and its residue partly is essentially iron except that unavoidable impurities.
2. the production method that is used to make color picture tube electrode-supporting frame device steel disc may further comprise the steps: the slab of preparing to have following composition, it comprises the carbon of 0.003～0.10wt.%, be no more than the silicon of 1.0wt.%, 0.05 the manganese of～1.5wt.%, be no more than the phosphorus of 0.10wt.%, be no more than the sulphur of 0.02wt.%, 1.5 the chromium of～8.0wt.%, 0.003 the aluminium of～0.1wt.% and the titanium of 0.08～0.40wt.%, 0.08 one or more in the niobium of～0.40wt.% and the vanadium of 0.08～0.40wt.%, this steel disc also can comprise one or more of following composition, be the following copper of 2.0wt.%, the nickel that 2.0wt.% is following, 0.01 the molybdenum of～2.0wt.%, 0.01 the tungsten of～2.0wt.% and the boron of 0.0003～0.0050wt.%, and its residue partly is essentially iron except that unavoidable impurities; With 820～950 ℃ of finishing temperatures and 400～700 ℃ of coiling temperature this slab is carried out hot rolling; Steel band after hot rolling is carried out skin-pass; Hot rolled strip before or after the skin-pass is carried out pickling.
3. the production method that is used to make color picture tube electrode-supporting frame device steel disc may further comprise the steps: the slab of preparing to have following composition, it comprises the carbon of 0.003～0.10wt.%, be no more than the silicon of 1.0wt.%, 0.05 the manganese of～1.5wt.%, be no more than the phosphorus of 0.10wt.%, be no more than the sulphur of 0.02wt.%, 1.5 the chromium of～8.0wt.%, 0.003 the aluminium of～0.1wt.% and the titanium of 0.08～0.40wt.%, 0.08 one or more in the niobium of～0.40wt.% and the vanadium of 0.08～0.40wt.%, this steel disc also can comprise one or more of following composition, be the following copper of 2.0wt.%, the nickel that 2.0wt.% is following, 0.01 the molybdenum of～2.0wt.%, 0.01 the tungsten of～2.0wt.% and the boron of 0.0003～0.0050wt.%, and its residue partly is essentially iron except that unavoidable impurities; With 820～950 ℃ of finishing temperatures and 400～700 ℃ of coiling temperature this slab is carried out hot rolling; Steel band after this hot rolling is carried out pickling; Carry out cold rolling to steel band after this pickling; At last this cold rolling back steel disc is annealed, again this steel disc after annealing is carried out skin-pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98102313 CN1130751C (en) | 1998-05-29 | 1998-05-29 | Steel sheet for use as electrode-supporting frame member of color picture tube and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98102313 CN1130751C (en) | 1998-05-29 | 1998-05-29 | Steel sheet for use as electrode-supporting frame member of color picture tube and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1237777A true CN1237777A (en) | 1999-12-08 |
| CN1130751C CN1130751C (en) | 2003-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98102313 Expired - Fee Related CN1130751C (en) | 1998-05-29 | 1998-05-29 | Steel sheet for use as electrode-supporting frame member of color picture tube and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1130751C (en) |
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1998
- 1998-05-29 CN CN 98102313 patent/CN1130751C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1130751C (en) | 2003-12-10 |
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