JP5035806B2 - Manufacturing method of primary cold-rolled shadow mask steel strip - Google Patents

Manufacturing method of primary cold-rolled shadow mask steel strip Download PDF

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JP5035806B2
JP5035806B2 JP2008518599A JP2008518599A JP5035806B2 JP 5035806 B2 JP5035806 B2 JP 5035806B2 JP 2008518599 A JP2008518599 A JP 2008518599A JP 2008518599 A JP2008518599 A JP 2008518599A JP 5035806 B2 JP5035806 B2 JP 5035806B2
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steel strip
shadow mask
mask steel
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俊 李
双 杰 ▲儲▼
海 玲 ▲関▼
秀 ▲貞▼ 林
仁 忠 金
建 清 ▲龍▼
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宝山鋼鉄股▲分▼有限公司
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00Apparatus 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
    • H01J9/02Manufacture of electrodes or electrode systems
    • H01J9/14Manufacture of electrodes or electrode systems of non-emitting electrodes
    • H01J9/142Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/004Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06Screens for shielding; Masks interposed in the electron stream
    • H01J29/07Shadow masks for colour television tubes

Description

本発明は、カラーブラウン管用シャドウマスク鋼帯およびその製造方法に関するものである。詳細的には、1次冷延シャドウマスク鋼帯における材質性能の制御技術と表面縦筋および鋼板状の制御技術に関するものである。   The present invention relates to a shadow mask steel strip for a color cathode ray tube and a manufacturing method thereof. More specifically, the present invention relates to a technology for controlling material performance in a primary cold-rolled shadow mask steel strip and a technology for controlling surface longitudinal bars and steel plates.

特許文献1において、1次冷延や連続焼鈍の方法でシャドウマスク鋼帯を製造することによって特許文献2に存在する欠陥を解消できることが提案されている。   In patent document 1, it is proposed that the defect which exists in patent document 2 can be eliminated by manufacturing a shadow mask steel strip by the method of primary cold rolling or continuous annealing.

化学成分から見て、高炭素含有量を有するシャドウマスク鋼帯はその性能が悪い。少量のNbを添加しても鋼の炭素全部を固定することが出来ない。ところが、耐時効性を著しく改善させるために、Nbの含有量を増加した後、耐時効性が改善できるが、磁性に不利であり、コストが高くなる。   In view of the chemical composition, the shadow mask steel strip having a high carbon content has poor performance. Even if a small amount of Nb is added, all the carbon of the steel cannot be fixed. However, in order to remarkably improve the aging resistance, the aging resistance can be improved after increasing the Nb content, but this is disadvantageous for magnetism and increases the cost.

製造工程では、単にNbを添加する鋼種は精錬鋳造において連続鋳造スラブが裂れやすく、熱延時のパラメータが変動しやすい。特にシャドウマスクのスクリーン最終製品の再結晶の温度を上昇させ、大幅に焼鈍温度を向上する必要があり、エネルギーが消耗してしまう。温度の上昇にシャドウマスクのスクリーンを焼鈍する後、曲げやすく、鋼板の形状が悪くなり、さらに高温焼鈍時、接着性が劣化する。   In the manufacturing process, the steel type to which Nb is simply added tends to tear the continuous casting slab in refining casting, and the parameters during hot rolling are likely to fluctuate. In particular, it is necessary to raise the recrystallization temperature of the final screen product of the shadow mask and to greatly improve the annealing temperature, which consumes energy. After the shadow mask screen is annealed to increase the temperature, it is easy to bend, the shape of the steel plate is deteriorated, and the adhesiveness is deteriorated during high temperature annealing.

特許文献1において、その製造工法が簡便で生産性が著しく高いことが提案されている。この特許では、超低炭素鋼素材(純鉄)または超低炭素鋼素材に少量の高炭素化物形成用元素TiまたはTiとNbをIF鋼素材として添加して、その添加物に炭素を炭化物として存在する。鋼素材における固溶体の含有量を大幅に減少し、耐時効性がより優れる。プレス成形性、特に成形均一性を保持することができる。化学成分の配合設計と製造工程におけるパラーメータの調整およびその最適化処理によりシャドウマスク鋼帯の材質性能および磁性は使用できる要求が満足される。この特許技術により製造されたシャドウマスク鋼帯は、材質性能、後加工性が優れて製造工法が非常に簡便で、従来の2次冷延シャドウマスク鋼帯に比して、生産するコストが低い利点がある。しかしながら、この特許技術は、以下の問題を抱えている。まず、この技術では、化学成分の範囲は好ましくない。例えば、元素C、Mn、Ti、Al、Nbを厳格に制御しなければならない。その材質性能や製造工法が不安定するならば、ユーザの使用に影響を及ぼす。例えば、元素OとSが厳しすぎる場合、生産コストが高くなる。その次、この特許製造方法では、例えばシャドウマスク鋼帯の材質性能に影響を与える熱延スラブの加熱温度、最終熱延温度、連続焼鈍温度や時間などのパラーメータを厳格に制御することはなく、または巻取温度やスキンパッシングの伸び率などのパラーメータを制御することも適切ではない。特に表面の状態や鋼板の形状に影響を及ぼすパラメータ、例えば、作動ロールのクラウン、表面粗度、スキンパッシングの引張り、圧延力やロール曲げ力などを最適化することはない。普通のパラメータにより製造したシャドウマスク鋼帯素材の表面には極めて縦黒筋が容易に生じ、周縁のウェーブが非常に劣化する。表面粗度も要求を満足できず、外見にも使用にも極めて影響を及ぼす。
中国特許ZL01113107.1号公報 国際公開出願WO96/13618
In Patent Document 1, it is proposed that the manufacturing method is simple and the productivity is remarkably high. In this patent, a small amount of high carbonization element Ti or Ti and Nb is added as an IF steel material to an ultra low carbon steel material (pure iron) or an ultra low carbon steel material, and carbon is added to the additive as a carbide. Exists. The content of solid solution in steel material is greatly reduced, and the aging resistance is more excellent. The press moldability, particularly the molding uniformity can be maintained. The material performance and magnetism of the shadow mask steel strip satisfy the requirements for use by adjusting the chemical composition formulation and adjusting the parameters in the manufacturing process and optimizing the parameters. The shadow mask steel strip manufactured by this patented technology has excellent material performance and post-workability, and the manufacturing method is very simple, and the production cost is lower than that of the conventional secondary cold-rolled shadow mask steel strip. There are advantages. However, this patented technology has the following problems. First, the range of chemical components is not preferred with this technique. For example, the elements C, Mn, Ti, Al, and Nb must be strictly controlled. If the material performance and manufacturing method become unstable, it affects the user's use. For example, when the elements O and S are too strict, the production cost becomes high. Next, in this patented manufacturing method, parameters such as the heating temperature of the hot-rolled slab that affects the material performance of the shadow mask steel strip, the final hot-rolling temperature, the continuous annealing temperature and time are not strictly controlled, It is also not appropriate to control parameters such as coiling temperature and skin passing elongation. In particular, parameters affecting the surface condition and the shape of the steel sheet, such as the crown of the working roll, the surface roughness, the tension of skin passing, the rolling force, the roll bending force, etc., are not optimized. Longitudinal black streaks are very easily generated on the surface of the shadow mask steel strip material manufactured according to ordinary parameters, and the peripheral wave is greatly deteriorated. The surface roughness cannot satisfy the requirements, and it greatly affects both appearance and use.
Chinese Patent ZL01113107.1 International Published Application WO 96/13618

従って、本発明の目的は、1次冷延するシャドウマスク鋼帯の材質性能や後加工性、お
よび生産性やストリップパッシングの安定性を向上し、コストを低減して、さらにシャドウマスク鋼帯の表面に縦型黒筋や周縁のウェーブに容易に生じる問題を解決するためのシャドウマスク鋼帯の表面外見およびその性能がユーザから要求されることを満足させる1次冷延するシャドウマスク鋼帯およびその製造方法を提供することにある。
Therefore, the object of the present invention is to improve the material performance and post-workability of the primary cold-rolled shadow mask steel strip, improve the productivity and stability of strip passing, reduce the cost, and further improve the shadow mask steel strip. A primary cold-rolled shadow mask steel strip that satisfies the surface appearance of the shadow mask steel strip and its performance required by the user to solve the problems easily caused by vertical black streaks and peripheral waves on the surface, and It is in providing the manufacturing method.

本発明の1次冷延シャドウマスク鋼帯の製造方法は、
重量比にして、下記の成分:
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%、
残部Feおよび不可避的不純物からなる1次冷延シャドウマスク鋼帯の製造方法であって、
以下(a)−(e)の工程を有し、
(a)精錬・鋳造・熱延した後、温度880〜900℃で最終熱延し、温度510〜610℃で巻取る工程、
(b)酸洗・冷延する工程、
(c)トリミングカット・ラインを用意し,周辺傷、バールなどの周辺部の欠陥を消滅して縁取る工程;
(d)加熱段と均熱段の板温が675〜695℃の範囲に制御し、20〜35s均熱する連続焼鈍を施す工程、
(e)作動ロールの直径が410〜460mm、作動ロールのクラウンが0.12〜0.24mm、シングルスタンドの圧延力が9,000〜12,000KN、ダブルスタンドの圧延力が6,000〜8,000KNであるダブルスタンド六ハイスキンパッシングミルによりスキンパッシングする工程を付与することを特徴とする1次冷延シャドウマスク鋼帯の製造方法。
The manufacturing method of the primary cold-rolled shadow mask steel strip of the present invention is as follows:
In weight ratio, the following ingredients:
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%,
A method for producing a primary cold-rolled shadow mask steel strip comprising the remainder Fe and inevitable impurities,
The following steps (a) to (e) are included:
(A) a step of refining, casting and hot rolling, followed by final hot rolling at a temperature of 880 to 900 ° C and winding at a temperature of 510 to 610 ° C;
(B) pickling and cold rolling,
(C) A step of preparing trimming cut lines to eliminate peripheral edges such as peripheral scratches and burls and bordering them;
(D) A step of controlling the plate temperature of the heating stage and the soaking stage to be in the range of 675 to 695 ° C., and performing continuous annealing soaking for 20 to 35 s,
(E) The diameter of the working roll is 410 to 460 mm, the crown of the working roll is 0.12 to 0.24 mm, the rolling force of the single stand is 9,000 to 12,000 KN, and the rolling force of the double stand is 6,000 to 8 A method for producing a primary cold-rolled shadow mask steel strip, characterized by providing a step of performing skin passing by a double stand six high skin passing mill that is 1,000 KN.

さらに、前記作動ロールの表面硬度がHs 93〜97であり、中間ロールの表面硬度がHs 81〜85である。   Furthermore, the surface hardness of the working roll is Hs 93 to 97, and the surface hardness of the intermediate roll is Hs 81 to 85.

前記作動ロール表面に艶消し処理を施した後、さらにクロムめっき処理を施す。
前記作動ロール表面に艶消しする処理は、電気火花放電処理、レーザ処理、または処理などを含む。特に電気火花放電処理が好ましい。
After the matting treatment is performed on the surface of the working roll, a chromium plating treatment is further performed.
The process of matting the working roll surface includes an electric spark discharge process, a laser process, or a process. In particular, electric spark discharge treatment is preferred.

前記作動ロール表面に艶消し処理またはクロムめっき処理を施す後、平均表面粗さ(Ra)が0.80〜1.20μmであり、ピーク値の個数(PC)が130〜170個/cmである。 After the matting treatment or chrome plating treatment is applied to the surface of the working roll, the average surface roughness (Ra) is 0.80 to 1.20 μm, and the number of peak values (PC) is 130 to 170 pieces / cm. .

ダブルスタンドのロール曲げ力が300〜500KNである。
ダブルスタンドスキンパッシングミルにおける入り口の引張りが11〜13kg/mmに制御され、中間および出口の引張りが35〜48kg/mmに制御される。
The roll bending force of the double stand is 300 to 500 KN.
In the double stand skin passing mill, the inlet tension is controlled to 11-13 kg / mm 2 and the middle and outlet tensions are controlled to 35-48 kg / mm 2 .

スキンパッシングの伸び率が1.3〜2.0%である。   The elongation of skin passing is 1.3 to 2.0%.

上記の製造方法におけるパラメータは、特許ZL01113107.1で記載された熱延スラブの加熱温度が1200−1250℃、冷延変形量が87−93%であることを除いて、さらに、最終熱延温度が880−900℃、熱延巻取温度が510−610℃であることを最適化する。また、連続焼鈍を施す前、トリミングカット・ラインを用意し、円滑にストリップパッシングする。それは、後述の連続焼鈍、スキンパッシングするパラメータにも厳しく制御でき、主なパラメータは以下の通りである。焼鈍温度が675−695℃、時間が20−35s;スキンパッシングの作動ロールのクラウンが0.12−0.24mm、ロールの径が410−460mm;スキンパッシングロールの表面粗度Raが0.80−1.20μm、PC値が130−170個/cmであった。   The parameters in the above manufacturing method are the final hot rolling temperature except that the heating temperature of the hot rolled slab described in Patent ZL01113107.1 is 1200 to 1250 ° C. and the cold rolling deformation is 87 to 93%. Is 880-900 ° C and the hot rolling coiling temperature is 510-610 ° C. Trimming cut lines are prepared and strip passing is performed smoothly before continuous annealing. It can be strictly controlled by the parameters for continuous annealing and skin passing described later, and the main parameters are as follows. Annealing temperature of 675-695 ° C., time of 20-35 s; skin passing action roll crown 0.12-0.24 mm, roll diameter 410-460 mm; skin passing roll surface roughness Ra 0.80 The PC value was -1.20 μm and the PC value was 130-170 pieces / cm.

本発明の化学成分の面では、特許文献1に比して、以下の点において相違する。1.C、Ti、MnおよびAl元素の範囲を減縮することによって主な元素が厳格に制御でき、シャドマスク鋼帯の性能がより安定できる。2.高価のNb元素を添加しないため、コストが低下する。3.OおよびS元素の範囲を大きくし、製綱工程のコストを減少する。   The aspect of the chemical component of the present invention is different from Patent Document 1 in the following points. 1. By reducing the range of C, Ti, Mn and Al elements, the main elements can be strictly controlled, and the performance of the shadow mask steel strip can be more stable. 2. Cost is reduced because expensive Nb element is not added. 3. Increase the range of O and S elements and reduce the cost of the steelmaking process.

本発明の製造工程の面では、特許文献1に比して、以下の点において異なる。1.最終
熱延温度および巻取温度を低下し、それらの温度範囲も減縮する。熱延スラブの品質を保持しつつ酸洗速度や製品の表面状態を向上し、コストを大幅に低減できる。2.連続焼鈍温度がやや下がり、その温度範囲も減縮し、均熱時間も短く、生産速度も大きくなるため、連続焼鈍温度の降下および均熱時間の縮短はコストを低下するとともに生産性と製品の品質も向上できる。3.トリミングカット・ラインを用意し、鋼帯の周辺傷やバルなどを効率よく除去し、スリトップパッシングの安定性およびその有効性を向上し、特に広い薄肉鋼板のスリトップパッシングの安定性も向上できる。4.スキンパッシングする方式、作動ロールの直径、ロールのクラウン、ロールの表面を艶消しして後処理する方式、表面硬度、表面粗度、伸び率、圧延力、引張りやロール曲げ力などのパラメータを一系に提供し、鋼帯表面の状態や鋼板の形状をより良好することが最も重要な一つである。
The aspect of the manufacturing process of the present invention is different from Patent Document 1 in the following points. 1. The final hot rolling temperature and the coiling temperature are lowered and their temperature range is also reduced. While maintaining the quality of the hot-rolled slab, the pickling speed and the surface condition of the product can be improved, and the cost can be greatly reduced. 2. The continuous annealing temperature drops slightly, the temperature range is reduced, the soaking time is short, and the production speed increases, so lowering the continuous annealing temperature and shortening the soaking time lowers costs and increases productivity and product quality. Can also be improved. 3. A trimming cut line is provided to efficiently remove scratches and burs around the steel strip, improve the stability and effectiveness of the sli-top passing, and improve the stability of the sli-top passing especially for wide thin steel plates. . 4). The parameters such as skin-passing method, working roll diameter, roll crown, and roll surface matt finish method, surface hardness, surface roughness, elongation rate, rolling force, tension and roll bending force are all the same. It is one of the most important to provide to the system and improve the condition of the steel strip surface and the shape of the steel sheet.

本発明の化学成分および生産パラメータによって製造されるシャドマスク鋼帯は、優れる材質性能および表面状態を有し、表面の縦筋をも消去した。さらに、鋼板の形状も良好する。本発明に提供される化学成分および生産パラメータによって、例えば、幅が490mmである2倍のシャドマスク鋼帯を製造できる。特許文献1に記載された製造工法を使用すると、1倍幅のシャドマスク鋼帯しか製造できず、生産性も低下し、製材率も低い。これに対して本発明の製造工法を用いて2倍幅のシャドマスク鋼帯(490mm×2)を製造でき、生産性も元の2倍となって、製材率も元の70%から90%に向上することが出来る。   The shadow mask steel strip produced by the chemical composition and production parameters of the present invention has excellent material performance and surface condition, and also eliminates vertical stripes on the surface. Furthermore, the shape of the steel plate is also improved. Depending on the chemical composition and production parameters provided in the present invention, for example, a double shadow mask steel strip having a width of 490 mm can be produced. If the manufacturing method described in Patent Document 1 is used, only a single-width shadow mask steel strip can be manufactured, productivity is lowered, and the lumbering rate is low. On the other hand, a double width shadow mask steel strip (490 mm × 2) can be manufactured using the manufacturing method of the present invention, the productivity is doubled, and the lumbering rate is reduced from the original 70% to 90%. Can be improved.

本発明の制御方法およびその原理について、以下に説明する。
比較的に低い最終熱延温度および巻取温度により鋼帯表面の酸化鉄膜を減少させることによって、前の製造工程から表面状態を厳格に制御され、熱延段階で生じた鋼帯の欠陥を最小限にして、温度範囲の減縮も精確にし、鋼帯の品質を安定することができる。
The control method and principle of the present invention will be described below.
By reducing the iron oxide film on the surface of the steel strip due to the relatively low final hot rolling temperature and coiling temperature, the surface condition is strictly controlled from the previous manufacturing process, and the defects in the steel strip caused by the hot rolling stage are eliminated. Minimizing, accurate reduction of the temperature range, and stable steel strip quality.

本発明によれば、トリミングカット・ラインを用意する。これはシャドマスク鋼帯のスキンパッシング工程において、引張りが大きい場合、バルや亀裂などの鋼帯周縁部の欠陥に起因する鋼帯が破損されやすいためである。本発明のシャドマスク鋼帯の中間製品は、CAPLおよびを経る先にたって、CPL縁取ることを経て、完全に前の工程で生じた周辺傷やバルを消去し、スキンパッシングする時、引張りが大きすぎると鋼帯が断裂されることもなく、シャドマスク鋼帯が大きい引張りや圧延力のもとで鋼帯の表面状態をより効
率よく改善させて、筋を消去することができる。
According to the present invention, a trimming cut line is prepared. This is because, in the skin passing process of the shadow mask steel strip, when the tension is large, the steel strip due to defects in the peripheral portion of the steel strip such as a bulge or a crack is easily damaged. The intermediate product of the shadow mask steel strip according to the present invention has a large tension when it is subjected to CPL edging before the CAPL and the peripheral scratches and balms generated in the previous process are completely erased and skin passing is performed. If it is too much, the steel strip is not torn, and the surface state of the steel strip can be improved more efficiently under large tension and rolling force of the shadow mask steel strip, thereby eliminating the streaks.

トリミングカット・ラインを用意した後、シャドマスク鋼帯に連続焼鈍を施す。それは、実質的に冷延後、加工硬化した鋼帯を回復焼鈍することによって、鋼帯鋼板の形状およびその微細組織を改善させ、加工硬化を部分に除去するものである。素材の再結晶温度に近いところに高温回復焼鈍することから、鋼帯素材が焼鈍温度に高感度すると考えれる。従って、加熱段階および均熱段階における板温および均熱時間は連続焼鈍を施す鍵なパラメータである。これらの段階の温度が高いほど縦筋の制御に有利がある。しかしながら、温度が高すぎると、鋼帯の局所を再結晶し、コアとなるおそれがある。局所に再結晶を発生し、しかも結晶成長する。これは、シャドマスク鋼帯製品材質性の制御に不利であって、エッチング後のシャドマスク・スクリーンを2次焼鈍する場合、組織性の制御に不利である。本発明によれば、シャドマスク鋼帯は、連続焼鈍における加熱段階と均熱段階の板温を675−695℃の範囲に調整し、均熱時間が20−35sの範囲にも制御する。焼鈍温度およびその時間はマッチングする。すなわち、焼鈍温度が低いほど時間が短くなると高温回復焼鈍による鋼板の形状や材質性能を改善する目的に達成できない。逆に、焼鈍温度が高いほど時間が長すぎると、鋼板の形状が改善できるが、鋼帯の局所を再結晶しやすく、材質が不均一でシャドマスク鋼帯のエッチング特性が劣化する。   After preparing the trimming cut line, the shad mask steel strip is subjected to continuous annealing. It is intended to improve the shape of the steel strip and its microstructure by recovering and annealing the work-hardened steel strip after substantially cold rolling, and to remove the work hardening partially. It is considered that the steel strip material is highly sensitive to the annealing temperature because it is annealed at a high temperature near the recrystallization temperature of the material. Therefore, the plate temperature and the soaking time in the heating stage and the soaking stage are key parameters for performing the continuous annealing. The higher the temperature at these stages, the more advantageous is the control of the longitudinal stripes. However, when the temperature is too high, there is a possibility that the local part of the steel strip is recrystallized and becomes a core. Recrystallization occurs locally and crystal growth occurs. This is disadvantageous for controlling the material quality of the shadow mask steel strip product, and is disadvantageous for controlling the texture when the shadow mask screen after etching is subjected to secondary annealing. According to the present invention, the shadow mask steel strip adjusts the plate temperature of the heating stage and the soaking stage in the continuous annealing to a range of 675-695 ° C., and controls the soaking time to a range of 20-35 s. The annealing temperature and its time are matched. In other words, if the annealing temperature is lower, the time becomes shorter, and the purpose of improving the shape and material performance of the steel sheet by high temperature recovery annealing cannot be achieved. Conversely, if the annealing temperature is higher and the time is too long, the shape of the steel sheet can be improved, but the local area of the steel strip can be easily recrystallized, the material is not uniform, and the etching characteristics of the shadow mask steel strip are deteriorated.

連続焼鈍を施した後、シャドマスク鋼帯が非常に重要なスキンパッシングする工程に入って、このスキンパッシングの作用は、以下に述べる。   After the continuous annealing, the shadow mask steel strip enters a very important skin passing process, and the action of this skin passing will be described below.

1.高温回復焼鈍後のシャドマスク鋼帯の強度および硬度を高めること;
2.鋼板の形を改善させ、良好な鋼帯のフラットネスが得られること;
3.鋼帯表面に適度な外見を付与し、Ra、Rmax、SmおよびRskなどを含むこと;
4.シャドマスク鋼帯の表面における各欠陥を除去すること。
1. Increasing the strength and hardness of the shadow mask steel strip after high temperature recovery annealing;
2. Improving the shape of the steel sheet and obtaining good flatness of the steel strip;
3. Imparting a moderate appearance to the surface of the steel strip, including Ra, Rmax, Sm, Rsk, etc .;
4). Remove each defect on the surface of the shadow mask steel strip.

上記のスキンパッシングの作用に基づいて、かならずスキンパッシングに関与するパラメータを厳格に制御しなければならない。スキンパッシングの方式、伸び率、作動ロールの直径、ロールのクラウン、表面粗度、表面処理状態、表層硬度およびダブルスタンドスキンパッシングの圧延力、各引張り、ロール曲げ力、特に後の3つのパラメータのマッチングによりシャドマスク鋼帯製品の板形、表面の外見、材質性能および表面欠陥の除去などのパラメータを含む。複数回の試験を探索したことにより、以下のようにスキンパッシングに関与するパラメータを得た。   Based on the effect of the above skin passing, the parameters involved in the skin passing must be strictly controlled. Skin passing method, elongation rate, working roll diameter, roll crown, surface roughness, surface treatment condition, surface hardness and rolling strength of double stand skin passing, each tension, roll bending force, especially the following three parameters It includes parameters such as plate shape, surface appearance, material performance and surface defect removal of shadow mask steel strip products by matching. By searching a plurality of tests, parameters related to skin passing were obtained as follows.

スキンパッシングする前に、各工程ではさまざまな表面欠陥を生じる可能性があり、特にロール傷、押し込み、傷つけなどある。ところが、ダブルスタンドスキンパッシングミルにより所定の圧力で変形後、鋼帯の表面欠陥を減少または除去することが出来る。鋼帯の表面状態の改善および表面の外見の制御を確保するために、伸び率を1.3−2.0%の範囲に制御する。だが普通の硬質材の伸び率は遥かに1.3%と低い。試験の実証により伸び率を高めるために、圧延力、1当たりの引張りおよびロール曲げ力を大幅に高める必要がある。伸び率が大きすぎると、生産性が不安定で鋼帯の板形が悪くなり、ロールの使用時間も短くなる。伸び率が小さすぎると、作動ロールの表面粗度が鋼帯の表面に複製しにくいため、鋼帯の表面粗度が所望の条件を満足できない。前の工程による表面欠陥も減少あるいは消滅することができない。   Prior to skin passing, various surface defects may occur in each process, especially roll scratches, indentations, and scratches. However, the surface defects of the steel strip can be reduced or eliminated after deformation at a predetermined pressure by the double stand skin passing mill. In order to ensure the improvement of the surface condition of the steel strip and the control of the appearance of the surface, the elongation is controlled in the range of 1.3-2.0%. However, the growth rate of ordinary hard materials is as low as 1.3%. In order to increase the elongation rate by demonstrating the test, it is necessary to significantly increase the rolling force, the tension per roll and the roll bending force. If the elongation is too large, the productivity is unstable, the plate shape of the steel strip is deteriorated, and the usage time of the roll is also shortened. If the elongation is too small, the surface roughness of the working roll is difficult to replicate on the surface of the steel strip, so the surface roughness of the steel strip cannot satisfy the desired condition. Surface defects due to previous processes cannot be reduced or eliminated.

シャドマスク鋼帯を圧延するダブルスタンドスキンパッシングミルにおける作動ロールのクラウンは0.12−0.24mmである。このクラウンは普通の鋼種を圧延する作動ロールのクラウンより遥かに大きい。この試験により、本発明のシャドマスク鋼帯について、クラウンが高すぎると、例えば0.24mmを超えた場合、ミッドルのウェーブが生
じやすく、クラウンが低すぎると、0.12mmより低い場合、周辺のウェーブが生じやすく鋼板の形状に不利であることがわかった。
The crown of the working roll in the double stand skin passing mill for rolling the shadow mask steel strip is 0.12-0.24 mm. This crown is much larger than the crown of the working roll that rolls ordinary steel grades. As a result of this test, if the crown is too high, for example, if it exceeds 0.24 mm, midle waves are likely to occur, and if the crown is too low, if the crown is too low, It was found that this is disadvantageous for the shape of the steel sheet.

ダブルスタンドスキンパッシングミルにおける作動ロールの直径が410−460mmである。ロールの径が大きすぎると、実際の圧延力が大きくなる。スキンパッシングミルにおける駆動モータのパワーも増大する。伸び率が1.3%未満である場合、ロールの径が小さすぎると、実際の圧延力が小さすぎて、鋼帯の表面の外見および表面状態が制御しにくい。作動ロールの粗度も鋼帯の表面に適当に複製することができず、表面の欠陥を除去しにくい。   The diameter of the working roll in the double stand skin passing mill is 410-460 mm. If the roll diameter is too large, the actual rolling force increases. The power of the drive motor in the skin passing mill also increases. When the elongation is less than 1.3%, if the roll diameter is too small, the actual rolling force is too small, and the appearance and surface state of the surface of the steel strip are difficult to control. The roughness of the working roll cannot be appropriately replicated on the surface of the steel strip, and it is difficult to remove surface defects.

繰り返しの試験やユーザからの評価に基づいて、ダブルスタンドスキンパッシングミルにおける作動ロールの平均表面粗度(Ra)が0.80−1.20μmであり、ピーク値の個数(PC)が130−170個/cmであることが明らかである。作動ロールRaおよびPC値は直接にシャドウマスク鋼帯製品のRa、Rmax、RskおよびSmに影響を及ぼす。よって、作動ロールRaおよびPC値を適度にする必要がある。表面粗度が大きすぎると、シャドウマスク・スクリーンのエッチング孔の界面に影響を与える。小さすぎると、シャドウマスク鋼帯が露光前真空を吸収時の真空度に影響を与える。   Based on repeated tests and user evaluations, the average surface roughness (Ra) of the working roll in a double stand skin passing mill is 0.80-1.20 μm and the number of peak values (PC) is 130-170. It is clear that the number is per piece / cm. The working roll Ra and PC value directly affect the Ra, Rmax, Rsk and Sm of the shadow mask strip product. Therefore, it is necessary to moderate the operating roll Ra and the PC value. If the surface roughness is too large, the etching hole interface of the shadow mask / screen is affected. If it is too small, the shadow mask steel strip will affect the degree of vacuum when absorbing the pre-exposure vacuum.

ダブルスタンドスキンパッシングミルにおける作動ロールの表面は電気火花放電した後、クロムめっき処理する。クロムめっき処理した作動ロールは寿命が著しく長くなる。そして鋼帯表面を改善でき、その表面粗度の各規格値を調整できる。   The surface of the working roll in the double stand skin passing mill is subjected to chrome plating after electric spark discharge. The chrome-plated working roll has a significantly longer life. And the steel strip surface can be improved and each standard value of the surface roughness can be adjusted.

ダブルスタンドスキンパッシングミルにおける作動ロールの表面硬度はHs 93−97であり、中間ロールの表面硬度はHs 81−85である。ロールの表面硬度が高すぎまたは表面硬度の範囲が小さい場合、例えば、作動ロールがHs 95−97となると、ロールの使用寿命も短くなり、クロムめっきの量も増える。コストが高くなり、ロールの表面硬度が極めて低く、鋼帯表面にロール傷が生じる。   The surface hardness of the working roll in the double stand skin passing mill is Hs 93-97, and the surface hardness of the intermediate roll is Hs 81-85. When the surface hardness of the roll is too high or the range of the surface hardness is small, for example, when the working roll is Hs 95-97, the service life of the roll is shortened and the amount of chromium plating is increased. The cost increases, the surface hardness of the roll is extremely low, and roll scratches occur on the surface of the steel strip.

ダブルスタンドスキンパッシングミルにおける入口引張りは、11−13kg/mmに、中間や出口の引張りが35−48kg/mmの範囲に制御する。引張りが大きすぎると、断裂しやすく、生産性が不安定で、引張りが小さすぎると、鋼帯鋼板の形状や表面状態が劣化する。 Inlet tension in the double stand skin passing mill, the 11-13kg / mm 2, tensile intermediate and outlet is controlled in the range of 35-48kg / mm 2. If the tension is too large, it is easy to tear, the productivity is unstable, and if the tension is too small, the shape and surface state of the steel strip are deteriorated.

シングルスタンドの圧延力が9,000−12,000KNである。ダブルスタンドの圧延力が6,000−8,000KNである。圧延力が大きすぎると、鋼帯に周辺のウェーブが生じやすく、エネルギーの消耗が大きくなる。圧延力が小さすぎると、ロールの表面粗度が鋼帯の表面に複製しにくいし、伸び率を満たすために引張りを増大しなければならないので、鋼帯を断裂する虞がある。   The rolling power of the single stand is 9,000-12,000 KN. The rolling force of the double stand is 6,000-8,000 KN. If the rolling force is too large, peripheral waves are likely to be generated in the steel strip, and energy consumption increases. If the rolling force is too small, the surface roughness of the roll is difficult to replicate on the surface of the steel strip, and the tension must be increased to satisfy the elongation rate, so that the steel strip may be torn.

ダブルスタンドスキンパッシングミルにおけるロール曲げ力が300−500KNである。ロール曲げ力が小さすぎると、周辺のウェーブが生じやすく、特に比較的に幅が大きいシャドマスク鋼帯を圧延するとき、周辺のウェーブがより生じやすいので、シングルスタンドおよびダブルスタンドスのロール曲げ力を設備の最大限300−500KNに制御して、ロール曲げ力が大きすぎる場合、設備はそのような要求に満たすことができない。   The roll bending force in the double stand skin passing mill is 300-500 KN. If the roll bending force is too small, the surrounding wave tends to be generated, especially when rolling a relatively large shadow mask steel strip, the surrounding wave is more likely to occur. If the equipment is controlled to a maximum of 300-500 KN and the roll bending force is too great, the equipment cannot meet such requirements.

上記の一連のパラメータの調整によって得られたシャドマスク鋼帯が特許文献1の利点があるだけではなく、生産率も向上できるし、コストも低下できるとともに表面の欠陥も有効に除去でき、鋼板の形状も良好し、特に表面縦筋もほとんど消滅する。   The shadow mask steel strip obtained by adjusting the above series of parameters not only has the advantages of Patent Document 1, but also can improve the production rate, reduce costs and effectively remove surface defects, and shape of the steel sheet. In particular, the surface vertical stripes disappear almost.

以下、本発明のパラメータに基づいて、本発明を実施例によりさらに説明する。
各実施例の工程は、以下の通りである。
Hereinafter, based on the parameters of the present invention, the present invention will be further described by examples.
The steps of each example are as follows.

連鋳スラブは熱延する前に熱延分塊温度に加熱して、粗圧延、精圧延および層流冷却後、巻取って2から3日にかけて室温で冷却して、それに続いてCDCMライン(酸洗、冷間連続圧延)を経て、その後、トリミングカット・ラインを用意し、CAPLライン(連続焼鈍およびスキンパッシング)を経て、最後に内部欠陥および表面状態を検出し、縁取り、分割巻取りする工程などの仕上がる工程を経てシャドマスク帯鋼の製品を製造する。   The continuous slab is heated to the hot-rolled slab temperature before hot rolling, and after rough rolling, fine rolling and laminar cooling, it is wound and cooled at room temperature over 2 to 3 days, followed by the CDCM line ( After pickling and cold continuous rolling), after that, trimming cut line is prepared, and through CAPL line (continuous annealing and skin passing), finally internal defects and surface condition are detected, edged, and divided winding Manufactures shadow mask strip steel products through finishing processes.

実施例および比較例では、化学成分(wt%)が表1、各種のパラメータが表2、品質に対する評価が表3にそれぞれに示される。   In Examples and Comparative Examples, chemical components (wt%) are shown in Table 1, various parameters are shown in Table 2, and quality evaluation is shown in Table 3.

Figure 0005035806
Figure 0005035806

Figure 0005035806
Figure 0005035806

Figure 0005035806
Figure 0005035806

本発明の製造工法およびそのパラメータによって得られるシャドマスク鋼帯は表面縦筋が著しく減少し、さらに除去する。表面粗度が要求される条件を満足でき、品質が安定で生産率が大きく向上する。ところが特許ZL01113107.1に記載された製造工程により、あるパラメータが厳しく制御されていないため、製造したシャドマスク鋼帯は鋼板の形状が悪く、表面に縦筋があり、周辺傷などの欠陥もあり、表面粗度値も不安定である。   The shadow mask steel strip obtained by the manufacturing method of the present invention and its parameters significantly reduces the surface vertical stripes and further eliminates them. Satisfies the requirements for surface roughness, stable quality and greatly improved production rate. However, because a certain parameter is not strictly controlled by the manufacturing process described in Patent ZL01113107.1, the manufactured shadow mask steel strip has a bad shape of the steel plate, has vertical streaks on the surface, and has defects such as peripheral scratches, The surface roughness value is also unstable.

Claims (8)

重量比にして、下記の成分:
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%、
残部Feおよび不可避的不純物からなる1次冷延シャドウマスク鋼帯の製造方法であって、
以下(a)−(e)の工程を有し、
(a)精錬・鋳造・熱延した後、温度880〜900℃で最終熱延し、温度510〜610℃で巻取る工程、
(b)酸洗・冷延する工程、
(c)トリミングカット・ラインを用意し、周辺傷、バールなどの周辺部の欠陥を消滅して縁取る工程;
(d)加熱段と均熱段の板温が675〜695℃の範囲に制御し、20〜35s均熱する連続焼鈍を施す工程、
(e)作動ロールの直径が410〜460mm、作動ロールのクラウンが0.12〜0.24mm、シングルスタンドの圧延力が9,000〜12,000KN、ダブルスタンドの圧延力が6,000〜8,000KNであるダブルスタンド六ハイスキンパッシングミルによりスキンパッシングする工程を付与することを特徴とする1次冷延シャドウマスク鋼帯の製造方法。
In weight ratio, the following ingredients:
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%,
A method for producing a primary cold-rolled shadow mask steel strip comprising the remainder Fe and inevitable impurities,
The following steps (a) to (e) are included.
(A) a step of refining, casting and hot rolling, followed by final hot rolling at a temperature of 880 to 900 ° C and winding at a temperature of 510 to 610 ° C;
(B) pickling and cold rolling,
(C) A step of preparing trimming cut lines to eliminate peripheral fringes and peripheral defects such as burr and trimming;
(D) A step of controlling the plate temperature of the heating stage and the soaking stage to be in the range of 675 to 695 ° C., and performing continuous annealing soaking for 20 to 35 s,
(E) The diameter of the working roll is 410 to 460 mm, the crown of the working roll is 0.12 to 0.24 mm, the rolling force of the single stand is 9,000 to 12,000 KN, and the rolling force of the double stand is 6,000 to 8 , 1 Tsugihiyanobe method of manufacturing a shadow mask steel strip you wherein applying a step of skin passing by the double stand hexadentate skin passing mill is 000KN.
前記作動ロールの表面硬度がHs93〜97であり、中間ロールの表面硬度がHs81〜85であることを特徴とする請求項に記載の1次冷延シャドウマスク鋼帯の製造方法。The surface hardness of the working roll is Hs93~97, method for producing a 1 Tsugihiyanobe shadow mask steel strip according to claim 1, wherein the surface hardness of the intermediate rolls is Hs81~85. 前記作動ロール表面に艶消し処理またはクロムめっき処理を施すことを特徴とする請求項に記載の1次冷延シャドウマスク鋼帯の製造方法。The method for producing a primary cold-rolled shadow mask steel strip according to claim 1 , wherein the surface of the working roll is subjected to a matting treatment or a chrome plating treatment. 前記作動ロール表面に艶消し処理またはクロムめっき処理を施す後、平均表面粗さ(Ra)が0.80〜1.20μmであり、ピーク値の個数(PC)が130〜170個/cmであることを特徴とする請求項またはに記載の1次冷延シャドウマスク鋼帯の製造方法。After the matting treatment or chrome plating treatment is applied to the surface of the working roll, the average surface roughness (Ra) is 0.80 to 1.20 μm, and the number of peak values (PC) is 130 to 170 pieces / cm. The manufacturing method of the primary cold-rolled shadow mask steel strip of Claim 1 or 3 characterized by the above-mentioned. ダブルスタンドのロール曲げ力が300〜500KNであることを特徴とする請求項に記載の1次冷延シャドウマスク鋼帯の製造方法。Method for producing a 1 Tsugihiyanobe shadow mask steel strip according to claim 1, wherein the roll bending force of the double stand is 300~500KN. ダブルスタンドスキンパッシングミルにおける入り口の引張りが11〜13kg/mmに制御され、中間および出口の引張りが35〜48kg/mmに制御されることを特徴とする請求項に記載の1次冷延シャドウマスク鋼帯の製造方法。The primary cooling according to claim 1 , wherein the inlet tension in the double stand skin passing mill is controlled to 11 to 13 kg / mm 2 , and the intermediate and outlet tensions are controlled to 35 to 48 kg / mm 2. A method for producing a rolled shadow mask steel strip. スキンパッシングの伸び率が1.3〜2.0%であることを特徴とする請求項に記載の1次冷延シャドウマスク鋼帯の製造方法。Method for producing a 1 Tsugihiyanobe shadow mask steel strip according to claim 1, wherein the elongation rate of the skin-passing is 1.3 to 2.0%. 前記艶消し処理は電気火花放電処理であることを特徴とする請求項またはに記載の1次冷延シャドウマスク鋼帯の製造方法。The method for producing a primary cold-rolled shadow mask steel strip according to claim 3 or 4 , wherein the matting treatment is an electric spark discharge treatment.
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