TW528808B - Method for manufacturing a steel plate and apparatus thereof - Google Patents
Method for manufacturing a steel plate and apparatus thereof Download PDFInfo
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- TW528808B TW528808B TW090131315A TW90131315A TW528808B TW 528808 B TW528808 B TW 528808B TW 090131315 A TW090131315 A TW 090131315A TW 90131315 A TW90131315 A TW 90131315A TW 528808 B TW528808 B TW 528808B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description
528808 五、發明說明（1) 拮術頜域 本發明係關於厚鋼板之製造方法，尤其是關於線上進 回火處理之製造方法及其設備。 背景技術 為了使板厚為8關以上之厚鋼板可獲取高強度化、高韋刀 性化’：：為採用藉由淬火和加速冷卻來急冷熱軋後的鋼 板後，接者:藉由回火處理方法進行製造的情況。 —近年，，淬火和加速冷卻已漸漸開始被利用在線上進 ^ :但是，由於回火處理仍舊不在線上而是使用氣體燃 爐來進行的原因需要花費長時間，從而明顯阻礙了厚鋼板 的生產性。 ^ 為了提升其生產性，日本專利特開平4-3 58 022號公報中 揭示了 f厚鋼板之生產線上言史置藉由淬火裝置或加速冷卻 f置及赭由通電加熱、感應加熱、紅外線輻射加熱、周邊 氣妝加熱等的加熱方式的急速回火裝置，以工。〇 /秒以上之 加熱速度直接加熱汗火或加速冷卻後之鋼板至規定溫度 後，立即以0. 0 5〜？ η 〇广/ u以 z u C /秒的冷卻速度進行冷卻、回火處 理之方法。 但是二:本專利特開平1358022號公報記載之方法中， 由於進行藉由氣之急速加熱之短時間的回火處理’因此 會有鋼板^表面溫度超過目標溫度，或是’在鋼板之板厚 方向產生較大溫差、而無法均進行回火處理鋼板的問 題。 發明揭示 C:\2D-C0DE\91-03\90131315.ptd 第5頁528808 V. Description of the invention (1) Mandibular jaw field The present invention relates to a method for manufacturing a thick steel plate, and more particularly to a manufacturing method and equipment for in-line tempering treatment. BACKGROUND ART In order to obtain a high-strength steel sheet with a plate thickness of 8 or more, a high-strength and high-knife-shaped steel sheet can be obtained. :: After the hot-rolled steel sheet is quenched by quenching and accelerated cooling, the following: In case of fire treatment method. —In recent years, quenching and accelerated cooling have gradually begun to be used on the wire ^: However, because the tempering process is still not on the line, but the use of a gas burner for the process takes a long time, which significantly hinders the production of thick steel plates Sex. ^ In order to improve its productivity, Japanese Patent Laid-Open No. 4-3 58 022 discloses the production line of the f-thick steel plate by using a quenching device or accelerated cooling, and heating by electric current, induction heating, and infrared radiation. The rapid tempering device of heating methods such as heating and peripheral air makeup heating works. 0 5〜? 〇 / sec above the heating speed directly heat the sweat or accelerated cooling of the steel plate to a specified temperature, immediately 0. 0 5 ~? The method of cooling and tempering at a cooling rate of z u C / sec. But 2: In the method described in Japanese Patent Laid-Open No. 1358022, because a short time tempering treatment by rapid heating by gas is performed, the surface temperature of the steel plate exceeds the target temperature, or the thickness of the steel plate There is a problem that a large temperature difference occurs in the direction, and it is not possible to temper the steel sheet in all directions. Invention Revealed C: \ 2D-C0DE \ 91-03 \ 90131315.ptd Page 5
528808 五、發明說明（2) 板t =之目的在於提供一種不會阻礙其生產性，而且鋼 行回=溫度不會超過目標溫度而可沿板厚方向均勻地進 該处理之厚鋼板之製造方法及其設備。 或Z : ϋ在於’在具有熱軋鋼扁塊成為鋼板的步驟，淬火 熱裝置^卩Ϊ軋後之鋼板的步驟，以及藉由電磁型感應加 回火處理Φ处Ϊ /卞火或加速冷卻後之鋼板的步驟，且進行 溫度^ Ρ ^藉由分成2次以上間斷性地加熱鋼板至目標 /皿厚鋼板的製造方法來達成。 且有I! 法，係藉由從製造步驟之上游側至下游側順序 ^力^爐:熱軋機、彳火裝置或加速冷卻裝置、以及2 者。 電磁型感應加熱裝置的厚鋼板之製造設備來實現 施形熊 例〉颂不本^明之厚鋼板之製造設備之實施形態之一 产：由ί軋機1熱軋之鋼板2，係由淬火裝置3來實施淬火 二型咸r’以平整軋機4進行平坦化處理，再由具備6台之電 理。U熱裝置6〜1至6 - 6之回火處理裝置實施回火處 火處理中’ $ 了使鋼板之表面溫度不致過目標溫 度而可於厚度方向 埶驶罢β 、 门進仃均勻加熱，使用6台電磁型感應加 Τ 2 . 至6 6中之部分或全部，分成2次以上間斷性地 加熱鋼板2至650 t前後之目標溫度。 圖2A、2B顯示分成！、2次分別間斷性地加熱8顏板厚之528808 V. Description of the invention (2) The purpose of plate t = is to provide a thick steel plate that does not hinder its productivity, and the steel return temperature does not exceed the target temperature, and can be evenly advanced in the plate thickness direction. Method and equipment. Or Z: ϋ lies in the step of becoming a steel plate with a hot-rolled steel slab, the step of quenching the hot-rolled steel plate, and the treatment of Φ by 卞 / beaming or accelerated cooling by electromagnetic induction and tempering The step of performing the steel plate and the temperature ^ P ^ are achieved by a method of manufacturing the target steel plate to the target / plate thick steel plate by intermittently heating the steel plate twice or more. In addition, there is an I! Method, which is performed in the order from the upstream side to the downstream side of the manufacturing process. ^ Force ^ furnace: hot rolling mill, flame device or accelerated cooling device, and two. Manufacturing equipment for thick steel plates of electromagnetic induction heating device to realize the shape of the bears> One of the embodiments of the manufacturing equipment for thick steel plates which is not simplified and clarified: The steel plate 2 is hot rolled by the rolling mill 1, and the quenching device is 3 Then, the quenched type II salt r 'is subjected to a flattening treatment by a slab rolling mill 4, and then six electric units are provided. U tempering device 6 ~ 1 to 6-6 in the tempering treatment of the tempering unit to reduce the surface temperature of the steel plate does not exceed the target temperature, can be driven in the thickness direction β, door into the uniform heating, Six or more electromagnetic induction sensors T 2. To 6 6 are used to heat the steel plate at a target temperature of 2 to 650 t intermittently. Figure 2A, 2B shows the split! And 2 times of 8-plate thickness
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I C:\2D-C0DH\91-03\90131315.ptd 528808 五、發明說明（3) 一 鋼板至6 5 0 °C前後時，鋼板之寬度方向中央部之實測表面 溫度和計算求得之板厚中心溫度的經時變化。此時，第卫 次加熱，使用電磁型感應加熱裝置、投入電力7 5MW、 頻率1 5 0 0Hz，第2次加熱，使用電磁型感應加埶裝置6-i和 6-2、投入電力 、3MW(6_2)、 進行。又’鋼板之搬送速度在任一情況均; β ”：力口熱，，表面溫度超過目標溫度而被過加熱，但 Ϊ以進行加熱時，表面溫度不會被過加熱，而 二=的，加熱表面溫度和板厚中心溫度至目 错由本發明之方法，不會阻礙生產性，而 均勾Ϊ 度不會超過目標溫度而可沿厚度方向進行 中心之献擴％要J :若鋼板之板厚增厚日寺，擴散至板厚 I必；：擴“要長時間1而有依照板厚增加加熱次數 作為加熱裝置，僙用φ 為其可急速加㉟，原理,^感應加熱裝置的理由，係因 溫度較易控制加熱條件。”赉熱集中於鋼板表面而由表面 各次之加熱後，只要 均溫度以下後再進行下一:板表面溫度成為厚度方向之平 度不會超過目標溫度而5 ===熱，可更為確實使表面溫 向之平均溫度係為針對某進行加熱。在4匕，厚度方 而求得之溫度。圖3翮/、B斷^之加熱方式藉由預先計算 58(TC時之例，但是1 =为成6次加熱40_板厚之鋼板至 向之平均溫度以下前’、隹〜於鋼板之表面溫度在成為厚度方 仃下一次之加熱，因此其表面溫度 C:\2D-OODE\91-O3\90131315.ptd 第7頁IC: \ 2D-C0DH \ 91-03 \ 90131315.ptd 528808 V. Description of the invention (3) The measured surface temperature of the central part in the width direction of the steel plate and the thickness obtained by calculation when the steel plate is around 650 ° C Changes in the core temperature over time. At this time, the second heating uses an electromagnetic induction heating device, with a power input of 750 MW and a frequency of 1 500 Hz, and the second heating uses an electromagnetic induction heating device 6-i and 6-2, with an electric power input of 3 MW. (6_2), proceed. Also, 'the conveying speed of the steel plate is in any case; β': the force is hot, and the surface temperature is overheated when the surface temperature exceeds the target temperature, but when heating is performed, the surface temperature will not be overheated, and two = Surface temperature and plate thickness center temperature to the wrong eye The method of the present invention will not hinder productivity, and the average hooking degree will not exceed the target temperature. The percentage expansion of the center can be performed in the thickness direction. J: If the thickness of the steel plate To increase the thickness of the temple, it must spread to the thickness of the plate I :: Expansion "It takes a long time and there is an increase in the number of heating times according to the plate thickness as a heating device. Using φ for rapid heating can increase the principle. It is easier to control heating conditions due to temperature. "After the heat is concentrated on the surface of the steel plate and the surface is heated for each time, as long as the average temperature is below the temperature, the next step is performed: the flatness of the surface temperature of the plate will not exceed the target temperature in the thickness direction and 5 === hot, can be more Make sure that the average temperature of the surface temperature is heating for a certain temperature. The temperature is calculated at the thickness of 4 daggers. The heating method in Figure 3 翮 /, B off ^ is calculated in advance by 58 (TC example, but 1 = For 60 times, the steel plate with a thickness of 40_plate thickness is below the average temperature, and the surface temperature of the steel plate will be the next time it becomes thicker, so its surface temperature is C: \ 2D-OODE \ 91-O3 \ 90131315.ptd Page 7
528808 五、發明說明（4) 在超過6 0 0。(：時被過加熱。 如圖1所示，當由孚敕 理時，卽可％ $ 正軋機4平坦化鋼板後再進行回火處 :即可進仃更為均勻的加熱。 $力成數次間斷性地；隹/ 熱裝置之電力和該頻率J仃力:”’使二入電磁型感應加 分進杆的*如山 羊為一疋即可，但是，至少在後半部 度方向谁^^，最好使減少方不會超過目標溫度而在厚 i間距以Ϊ時：ΪΪ在是，在使回火處理之效率為軋 Λ匕士认+丄了·取好在不超過目標溫度的範圍内投入儘可 : …’最好使在前半部分進行的次數中投入之電力528808 V. Description of the invention (4) In excess of 600. (: Is overheated. As shown in Fig. 1, when processed by Fuer, the %% rolling mill 4 flattens the steel plate before tempering: you can enter more uniform heating. $ 力 成 数Intermittently; 隹 / The power of the heating device and the frequency J 仃 force: "'Make the two-in electromagnetic induction induction points into the pole * If the goat is a 疋, but who is at least in the direction of the second half ^^ It is best to make the reducing side not exceed the target temperature when the distance between the thickness and the thickness is Ϊ: ΪΪYes, when the tempering efficiency is set to Λ 匕 士士 + 丄, take it in the range that does not exceed the target temperature Make the most of your investment:… 'It's best to use the electricity that you put in the first half
二、木大而在後半部分進行的次數中減少電力。 W ^使用電磁型感應加熱裝置之頻率為2〇〇HZ以上時，在 攸薄鋼板至厚鋼板的廣泛的板厚範圍内可形成均勻加熱。 f其是，當次數和頻率均低時感應電流之滲透深度順序變 米 了於板尽方向形成更為均勻的加熱。事實上，頻率為 20 0Hz之滲透深度約為2mm，但是，在加熱8mm板厚之鋼板 的情況，當滲透深度超過2mm時，則板厚方向之溫度控制 成為不可能。因此，有使頻率為2〇〇Hz以上之必要，現狀 所使用之商用頻率之最大值為2〇〇〇 Hz。Second, Muda reduced power in the number of times performed in the second half. W ^ When the frequency of the electromagnetic induction heating device is 2000 Hz or more, uniform heating can be formed in a wide range of plate thicknesses from thin steel plates to thick steel plates. f It is that when the number and frequency are low, the penetration depth of the induced current changes in order to form a more uniform heating in the direction of the plate. In fact, the penetration depth at a frequency of 200 Hz is about 2 mm. However, in the case of heating a steel plate with a thickness of 8 mm, when the penetration depth exceeds 2 mm, temperature control in the thickness direction becomes impossible. Therefore, it is necessary to make the frequency above 2000 Hz, and the maximum value of the commercial frequency currently used is 2000 Hz.
只要使用如下數式（1)來決定電磁型感應加熱裝置之全 電力P的話，即成為可以軋壓間距以上的效率進行回火處 理，從而可獲得更高之生產性。 P^(l/??)-p.H-L-Cp-( ΔΤ/ Δΐ) · [(Lc+Lw)/Lc] · [1/(Ν · Μ)] (1) 在此，各元件編號分別表示如下的意味。即，β ••加熱As long as the following formula (1) is used to determine the full electric power P of the electromagnetic induction heating device, tempering treatment can be performed at an efficiency greater than the rolling pitch, and higher productivity can be obtained. P ^ (l / ??)-pH-L-Cp- (ΔΤ / Δΐ) · [(Lc + Lw) / Lc] · [1 / (Ν · Μ)] (1) Here, each element is numbered separately It means the following. That is, β •• heating
\\312\2d-code\91-03\90131315.ptd 第 8 頁 528808 ι * » ( * · k ^ 1 五、發明說明（5) 效率、p :鋼密度（Kg/m3)、H :鋼板厚度（m)、w :鋼板寬 度（m)、L :鋼板長度（m)、Cp :比熱（J/kg°C)、ΔΤ ··必要 之溫度上升（°C )、△ t :鋼板之軋壓間距（秒）、l c :線圈 長（m)、Lw :電磁型感應加熱裝置間距離（m)、n :電磁型 感應加熱裝置之台數、Μ :加熱次數。 例如，加熱40mm板厚之鋼板（重量為i2〇〇〇kg)的情況， 其中，？？ = 0· 7、Cp = 60 0J/kg °C、ΔΤ二6 0 0 °C、^1: = 180 秒、 Lc=lm、Lw=lm，當沿一方向移動2台電磁型感應加熱裝置 進行加熱時，每一台則需要34MW以上的電力。此外，使用 3台電磁型感應加熱裳置按一個來回半移動鋼板進行加熱 的情況，則必須要有7· 6 MW以上的電力。如此，為使以軋 壓間距以上的效率進行回火處理，可使用數式（丨）並按照 電磁型感應加熱裝置之台數來設定電力。 在以電磁型感應加熱裝置加熱厚鋼板的情況，由於不僅 鋼板之上下面連寬度方向之切面也被加熱，因而其鋼板之 寬度方向的端部比板寬中央部要形成過加熱。本發明者等 在對鋼板見度方向的表面溫度進行檢討的過程中，瞭解到 在相當於板厚之範圍的寬度中，其比中央部約過加熱丨.5 倍。因此，在回火處理中，若一邊冷卻鋼板之寬度方向的 端部一邊進行回火處理的話，可容易防止鋼板之寬度方向 端部的過加熱。 圖1之裝置中，為了使回火處理均勻化，係設置平整軋 機4且在處理鋼板前先進行平坦化處理，但是，若在處理 後設置平整軋機也可製造平坦性優良的鋼板。\\ 312 \ 2d-code \ 91-03 \ 90131315.ptd Page 8 528808 ι * »(* · k ^ 1 V. Description of the invention (5) Efficiency, p: steel density (Kg / m3), H: steel plate Thickness (m), w: width of steel plate (m), L: length of steel plate (m), Cp: specific heat (J / kg ° C), ΔT · necessary temperature rise (° C), △ t: rolling of steel plate Pressure interval (seconds), lc: coil length (m), Lw: distance between electromagnetic induction heating devices (m), n: number of electromagnetic induction heating devices, M: number of heating times. For example, heating a plate with a thickness of 40 mm In the case of a steel plate (weight is i200 000 kg), where ?? = 0.7, Cp = 60 0 J / kg ° C, ΔT 2 600 ° C, ^ 1: = 180 seconds, Lc = lm, Lw = lm, when two electromagnetic induction heating devices are moved in one direction for heating, each one requires more than 34MW of power. In addition, three electromagnetic induction heating devices are used to heat the steel plate by one and a half moving back and forth. In this case, it is necessary to have a power of 7.6 MW or more. In this way, in order to perform the tempering treatment at an efficiency higher than the rolling pitch, the formula (丨) can be used and the number of electromagnetic induction heating devices can be used. In the case of heating a thick steel plate with an electromagnetic induction heating device, not only the upper and lower surfaces of the steel plate but also the cross-section in the width direction are also heated. Therefore, the widthwise end of the steel plate is overheated than the center of the plate width. In the process of reviewing the surface temperature in the visibility direction of the steel sheet, the present inventors learned that in a width corresponding to the thickness of the steel sheet, it was approximately overheated by about 5 times the central portion. Therefore, during tempering, During the treatment, if the tempering treatment is performed while cooling the widthwise end portion of the steel plate, it is easy to prevent overheating of the widthwise end portion of the steel plate. In the apparatus of FIG. 1, in order to make the tempering treatment uniform, it is flattened. The rolling mill 4 performs a flattening treatment before the steel sheet is processed. However, if a flattening mill is installed after the treatment, a steel sheet having excellent flatness can be produced.
\\312\2d-code\91-03\90131315.ptd 第9頁 528808： 五、發明說明（6) 由：感應加熱係自鋼板表面投入能 而，其在厚度方向不易形成均句加轨。達成加熱，因 長。但是，由於藉由搬送輥子而可支牲f之線圈長儘可能 隔，在考慮到鋼板的扭曲K = 反的輕子間間 使電磁型感應加熱裝置之線圈；為广5二5;: 0此，最好 板在：m:; j到下-次加熱的期間，雖有冷卻鋼 散，=ί會自鋼板之表面向著板厚中心產生熱擴 化需要有仿ΐ/鋼板溫度之均句化。為了使鋼板溫度均勻 :=和棒寺幾乎相，，只要使各電磁型感應 板，)為線圈長以上，即可在薄鋼板至厚鋼板的廣泛 板尽耗圍内進行均勻加熱。 、 圖，1 =裝置中，在回火處理裝置的入側和出側設置溫度 ^ 藉此，可控制投入電磁型感應加熱裝置的電力和該 老；。尤其是，在厚鋼板之熱處理中，由於從品質觀點上 慮有正確把握鋼板表面溫度的必要，因此，溫度計最好 使用可同時計測長度方向和寬度方向的溫度分布的一 二維的掃描型溫度計。 、3 右在電磁型感應加熱裝置的内部或出口側，設置冷部鋼 板之I度方向端部用的冷卻機構，即可防止端部的過力口、 熱。 7為冷卻機構可列舉圖4所示之空氣喷射管、圖5所示之 水噴射噴嘴、圖6所示之水冷卻輥子等。\\ 312 \ 2d-code \ 91-03 \ 90131315.ptd Page 9 528808: V. Description of the invention (6): Induction heating system puts energy from the surface of the steel plate, and it is not easy to form a uniform sentence in the thickness direction. Achieve heating due to long. However, since the length of the coils that can be supported by the rollers is separated as much as possible, the coils of the electromagnetic induction heating device are made between the lepton cells taking into account the distortion of the steel plate K = reverse; 5: 5; 0 Therefore, it is best that the plate is between: m :; j to the next-time heating period, although there is cooling steel, = ί will generate thermal expansion from the surface of the steel plate toward the center of the thickness of the plate. Into. In order to make the temperature of the steel plate uniform: = almost the same as the rod temple, as long as each electromagnetic induction plate is made longer than the coil length, uniform heating can be performed in a wide range of thin steel plates to thick steel plates. , Figure, 1 = In the device, set the temperature on the inlet side and the outlet side of the tempering treatment device ^ By this, the electric power input to the electromagnetic induction heating device and the old one can be controlled; In particular, in the heat treatment of thick steel plates, since it is necessary to accurately understand the surface temperature of the steel plate from a quality point of view, it is best to use a two-dimensional scanning type thermometer that can simultaneously measure the temperature distribution in the length and width directions. . 3, Right Inside the electromagnetic induction heating device or at the outlet side, a cooling mechanism for the I-degree end of the cold section steel plate can be installed to prevent excessive force and heat at the end. Reference numeral 7 denotes a cooling mechanism. Examples of the cooling mechanism include an air jet pipe shown in Fig. 4, a water jet nozzle shown in Fig. 5, and a water cooling roller shown in Fig. 6.
\\312\2d- c〇de\9l.〇3\9〇13i315.ptd 第10頁 528808 五、發明說明（7) 圖4中’在電磁型感應加熱裝置6内和巢置間，設有對白 置於鋼板兩端部之開設有直徑為0 3mm之孔丨3之陶究制介口 氣喷射管12a、12b。空氣係自空氣供應管14供應給該^ 賀射管12a、12b，並且從孔13向鋼板端部均勻地吹冷卻用 空氣。該空氣之流量係藉由流量調整閥來控制，其^ 制冷卻能力之構成。 ’、… 二 、圖5中，在電磁型感應加熱裝置6間，在鋼板2之兩端部 近旁設置上下一對的水喷射噴嘴丨6。此外，設置空氣噴射 喷頭17和水切斷輥子18，其用來切斷水藉以使自水嘖射 嘴1 6喷射的冷卻水不會流入線圈近旁。 、、、 水上電Λ型感應加熱裝置間，其内部設徵多個被 亦即、水冷卻輥子19。藉由將水冷卻 犏子1 9抵接在鋼板2之端部來冷卻鋼板之端部。 藉由此種冷卻機構之端部的冷卻條件，係自藉由用 理之鋼板板寬、板厚、鋼板之搬送速度而預先計算之數2 戶:求：之寬度方向中央部附近的升溫曲率，來求得端部附 =之升溫曲率’藉以將端部之角部溫度控制在目標以 下。 圖1所示之回火處理裝置5中，也可沿一方向一邊 板2 -邊間斷性地進行加熱，但是，在回火處理裝置5内來 :移=板也可進行相同的加熱。尤其是，在厚鋼板的情 / ’雖有分數次間斷性地加熱鋼板的必要，但是，也可 由來回移動來減少電磁型感應加熱裝置的台數。此 ^ 火處理裝置5上設有6台電磁型感應加熱裝置，但是，只要\\ 312 \ 2d- c〇de \ 9l.〇3 \ 9〇13i315.ptd Page 10 528808 V. Description of the invention (7) In Figure 4, 'in the electromagnetic induction heating device 6 and between nests, there are The ceramic nozzle air injection pipes 12a and 12b are provided at the two ends of the steel plate with holes with a diameter of 0.3mm. Air is supplied from the air supply pipe 14 to the spray pipes 12a and 12b, and the cooling air is blown uniformly from the holes 13 toward the end of the steel plate. The air flow is controlled by a flow adjustment valve, and its cooling capacity is controlled. In Fig. 5, in the electromagnetic induction heating device 6, a pair of upper and lower water spray nozzles 6 are provided near both ends of the steel plate 2. In addition, an air jet nozzle 17 and a water cutting roller 18 are provided to cut off water so that the cooling water sprayed from the water jet nozzle 16 does not flow into the vicinity of the coil. The water-powered Λ-type induction heating device includes a plurality of water cooling rollers 19 inside. The end of the steel plate is cooled by abutting the water-cooled ladles 19 on the end of the steel plate 2. The cooling conditions at the ends of such cooling mechanisms are calculated in advance based on the steel plate width, plate thickness, and steel plate conveying speed. Calculate the heating temperature curvature near the central portion in the width direction. , To find the temperature-increasing curvature at the end of the end = to control the corner temperature of the end below the target. In the tempering treatment device 5 shown in FIG. 1, the plate 2 may be intermittently heated along one direction. However, in the tempering treatment device 5, the same heating can be performed by shifting the plate. In particular, in the case of thick steel plates, it is necessary to intermittently heat the steel plates in fractions, but the number of electromagnetic induction heating devices can also be reduced by moving back and forth. There are 6 electromagnetic induction heating devices on the fire treatment device 5. However, as long as
C:\2D-CODE\9l-03\90131315.ptd 第11頁 528808 五 、發明說明（8) 為至少之2台以上的話，即可對應從薄鋼板至厚鋼板的廣 泛板厚範圍。尤其是，在薄鋼板的情況，由於加熱間的溫 度下降大’故。需要有2台以上的電磁型感應加熱裝置。 (實施例1 ) 使用圖1所示之厚鋼板之製造設備，藉由淬火裝置3水冷 部由熱軋機1熱軋後之板厚為5〇mm的鋼板2至3〇它為止， 由=整軋機4進行平坦化處理後，再由6台之電磁型感應加 熱裝置6-1至6-6構成之回火裝置5，以表1所示之條件進行 65 0 °C之回火處理。又，各電磁型感應加熱裝置之頻率均 定為 1 0 0 0Hz。 比較例為僅使用電磁型感應加熱裝置6-1，一次將鋼板 表面/la度加熱至6 5 0 C之例子。如圖7所示，只使用3 〇秒其 表面f度即成為6 5 0，此時之板厚中心部的溫度為4 〇 〇 C °隨f ’其表面和板厚中心部均成為5〇〇它左右的溫 度’但是並不會達到目標溫度之β 5 。 發明例1為使用電磁型感應加熱裝置6-1至6 —4，且分成4 次將鋼板表面溫度加熱至65〇 〇C之例子。如圖8所示，使用 2^00秒之時間其表面溫度成為65〇。〇，此時之板厚中心部的 !度為63 0。。，從而可於厚度方向均勻地加熱為目標溫 發明例2為使用電磁型感應加熱裝置6 — i至6〜6，且分成6 次將鋼板表面溫度加敎至β 5 〇 〇厂 , …、主bbU C之例子。如圖Θ所示，使用 二表面溫度成為650。° ’此時之板厚中心部的 皿度為640 C，從而可於厚度方向均句地加熱為目標溫C: \ 2D-CODE \ 9l-03 \ 90131315.ptd Page 11 528808 5. Description of the invention (8) If there are at least two or more units, it can correspond to a wide range of plate thicknesses from thin steel plates to thick steel plates. In particular, in the case of a thin steel plate, the temperature drop between heating rooms is large '. Two or more electromagnetic induction heating devices are required. (Example 1) Using the manufacturing equipment for the thick steel plate shown in FIG. 1, the steel plate 2 having a thickness of 50 mm after being hot-rolled by the hot rolling mill 1 through the water-cooling section of the quenching device 3 is up to 50 mm. After the rolling mill 4 is subjected to the flattening treatment, the tempering device 5 composed of six electromagnetic induction heating devices 6-1 to 6-6 is subjected to a tempering treatment at 65 ° C under the conditions shown in Table 1. The frequency of each electromagnetic induction heating device is 100 Hz. The comparative example is an example in which only the electromagnetic induction heating device 6-1 is used and the steel sheet surface / la degree is heated to 6 50 ° C at a time. As shown in FIG. 7, using only 30 seconds, the surface f degree becomes 6 50, and the temperature at the center of the plate thickness at this time is 400 ° C. With f ′, both the surface and the center of the plate thickness become 50. 〇Temperature around it 'but will not reach β 5 of the target temperature. Invention Example 1 is an example in which an electromagnetic type induction heating device 6-1 to 6-4 is used, and the surface temperature of the steel sheet is heated to 6500C in 4 times. As shown in FIG. 8, the surface temperature becomes 65 ° after 2 ^ 00 seconds. 〇, the degree at the center of the plate thickness at this time is 63 0. . Therefore, the target temperature can be uniformly heated in the thickness direction. Inventive Example 2 uses an electromagnetic induction heating device 6 — i to 6 to 6, and divides the steel plate surface temperature to β 5 00 plant in 6 times. Example of bbU C. As shown in Fig. Θ, the two-surface temperature becomes 650. ° ’At this time, the plate thickness at the center of the plate thickness is 640 C, so that it can be evenly heated to the target temperature in the thickness direction.
528808 五、發明說明（9) 度。 表1 搬送速度 感應加熱裝 :置之 投入電力（MW) (m/s) 6-1 6-2 6-3 6-4 6-5 6-6 比較例 0.53 10 - - - - - 發明例1 1.56 10 5 β 3 - - 發明例2 2.76 10 10 8 8 6 4 (實施例2) 與實施例1之發明例2相同地使用電磁型感應加熱裝置 6 -1至6 - 6，且如表2所示般地改變各電磁型感應加熱裝置 之投入電力和頻率，分成6次將板厚為5 0 mm之鋼板表面溫 度加熱至6 5 0 °C為止。又，其鋼板之搬送速度係定為 2.76m/s之定值。 該情況也可獲得和圖9之結果相同的結果，從而可於厚 度方向均勻地加熱為目標溫度。 表2 ____ 感應加熱裝置 6-1 6-2 6-3 6-4 6-5 6-6 投入電力（MW) 10 10 8 8 8 6 頻率（Hz) 2000 1000 200 200 200 200 (實施例3)528808 V. Description of invention (9) Degree. Table 1 Transfer Speed Induction Heating Device: Input Power (MW) (m / s) 6-1 6-2 6-3 6-4 6-5 6-6 Comparative Example 0.53 10-----Invention Example 1 1.56 10 5 β 3--Invention Example 2 2.76 10 10 8 8 6 4 (Embodiment 2) The same as Invention Example 2 of Embodiment 1, an electromagnetic induction heating device 6 -1 to 6-6 was used, as shown in Table 2 The input power and frequency of each electromagnetic induction heating device were changed as shown, and the surface temperature of the steel plate with a thickness of 50 mm was heated to 650 ° C in 6 times. The conveying speed of the steel plate is set at a fixed value of 2.76 m / s. In this case, the same result as that of Fig. 9 can be obtained, so that the target temperature can be uniformly heated in the thickness direction. Table 2 ____ Induction heating device 6-1 6-2 6-3 6-4 6-5 6-6 Input power (MW) 10 10 8 8 8 6 Frequency (Hz) 2000 1000 200 200 200 200 (Example 3)
C:\2D-C0DE\91-03\90131315.ptd 第13頁 528808 五、發明說明（ίο) " 使用圖1所示之厚鋼板之製造設備，藉由淬火裝置3水冷 卻由熱軋機1熱軋後之板厚為20mm 、長度為l〇mm的鋼板2 至3 0 C為止，由平整軋機4進行平坦化處理後，再自電磁 型感應加熱裝置6 - 1至6 - 6移動一個半來回，亦即、分成9 次進行加熱藉以進行6 5 〇 °c之回火處理。各次之投入電力 為表2所顯示者。又，使鋼板之搬送速度依一個來回半之 去來去、分別為〇· 17、〇· 30、0· 30m/s，此外，各電磁型 感應加熱裝置之頻率均定為1 0 00Hz。在來回移動中係在停 止3秒後再進行反方向的移動。 圖10顯示鋼板之長度方向之前端位置的表面溫度和板厚 中心溫度的經時變化。 鋼板之表面溫度和板厚中心溫度係大致一起加轨為6 5 0 X。 ·'、 表3 感應加熱裝置之投入電力（KW) 6] 6-2 6-3 6-4 6-5 6-6 去路 4000 3800 3000 - 一 - 回路 1800 2200 2500 一 一 - 去路 1000 600 200 一 一 - 使用圖1所示之厚鋼板之製造設備，藉由淬火裝置3水冷 卻由熱軋機1熱軋後之板厚為40mm的鋼板2至30 °C為止，由 平整軋機4進行平坦化處理後，採用由6台電磁型感應加熱C: \ 2D-C0DE \ 91-03 \ 90131315.ptd Page 13 528808 V. Description of invention (ίο) " The manufacturing equipment using the thick steel plate shown in Fig. 1 is cooled by a quenching device 3 by a hot rolling mill 1 After hot rolling, the steel plate with a thickness of 20 mm and a length of 10 mm is 2 to 30 C. After being flattened by the flat rolling mill 4, it is moved from the electromagnetic induction heating device 6-1 to 6-6 Semi-reciprocating, that is, heating is divided into 9 times for tempering treatment at 650 ° C. The input power of each time is shown in Table 2. In addition, the conveying speed of the steel plate was moved back and forth one by one, respectively, 17, 17, 0, 30 m / s, and the frequency of each electromagnetic induction heating device was set to 1000 Hz. During the back-and-forth movement, the movement is reversed after stopping for 3 seconds. Fig. 10 shows changes in the surface temperature and the thickness center temperature of the steel sheet over time in the front end position in the longitudinal direction. The surface temperature of the steel plate and the center temperature of the plate thickness are approximately 6 5 0 X plus rail. · ', Table 3 Input power of induction heating device (KW) 6] 6-2 6-3 6-4 6-5 6-6 Outbound 4000 3800 3000-One-Circuit 1800 2200 2500 One Out-1000 600 200 One I- Using the thick steel sheet manufacturing equipment shown in Figure 1, water quenched by the hot rolling mill 1 with a quenching device 3 to cool the steel sheet with a plate thickness of 40 mm 2 to 30 ° C, and flattened by the flat rolling mill 4 After processing, adopt 6 electromagnetic induction heating
C:\2D-CODE\91-O3\90131315.ptd 第14頁 528808C: \ 2D-CODE \ 91-O3 \ 90131315.ptd Page 14 528808
臬。1至6〜6組成之回火装置5，按表4所示之條件進行 65 0 C之回火處理。又，鋼板之搬送速度為〇 ，此 外、電磁型感應加熱I置之頻率均定為1 〇 〇 〇 Hz。在電磁 塑感應加熱I置之裝置内和至6_5之裝置間， 設置圖4所示之空氣嗔射管，沛、生 ,, Λ ^ 亚以表4所示之條件喷射空氣 至鋼板的端部。 圖11顯示位於離鋼板之長庶古a 、， ^山丄 度方向之珂端l〇m位置的寬度 方向中央部表面①和板厚中心⑨夫* ^ ^ ^ ⑷和見度方向端部之角部⑨ 和板厚中心部④之4點的溫度的經時變化。 在寬度方向端部之角部不會發生大大超過65〇 t的 熱，使用200秒前後的短時間即可加熱鋼板各 為65 0 t。 心，皿度成provincial judge. The tempering device 5 composed of 1 to 6 to 6 is subjected to a tempering treatment of 65 0 C according to the conditions shown in Table 4. In addition, the conveying speed of the steel sheet is 0, and the frequency of the electromagnetic induction heating I is set to 1000 Hz. In the device of electromagnetic plastic induction heating I and the device to 6_5, set the air jet tube shown in Figure 4, Pei, Sheng ,, ^ ^ Asia to spray the air to the end of the steel plate under the conditions shown in Table 4 . FIG. 11 shows the surface of the central portion ① in the width direction and the center of the plate thickness center at the position 10m away from the long end of the steel plate, and the thickness end of the end of the plate. ^ ^ ^ The temperature at the corners ⑨ and the plate thickness center ④ changes over time at four points. At the corners in the widthwise direction, heat that does not exceed 65.0 t is generated, and the steel plates can be heated for 6 0 t each in a short time of about 200 seconds. Heart, dish
2 鋼板2 steel plate
C:\2D-C0DE\91-03\90131315.ptd 第15頁 528808C: \ 2D-C0DE \ 91-03 \ 90131315.ptd Page 15 528808
528808 圖式簡單說明 圖1為顯示本發明之厚鋼板之製造設備之實施形態之一 例圖。 圖2A、2B為顯示分成1、2次加熱8mm板厚之鋼板至650 °C 前後時，其表面溫度和板厚中心溫度的經時變化圖。 圖3為顯示分成6次加熱40mm板厚之鋼板至580 °C時，其 表面溫度的經時變化圖。 圖4為顯示冷卻鋼板寬度方向之端部用的空氣喷射管的 一例圖。 圖5為顯示冷卻鋼板寬度方向之端部用的水喷射喷嘴的 一例圖。 圖6為顯示冷卻鋼板寬度方向之端部用的水冷卻輥子的 一例圖。 圖7為顯示以1次加熱5 0 m m板厚之鋼板至6 5 0 °C前後時， 其表面溫度和板厚中心溫度的經時變化圖。 圖8為顯示分成4次加熱50mm板厚之鋼板至650 °C前後 時，其表面溫度和板厚中心溫度的經時變化圖。 圖9為顯示分成6次加熱50mm板厚之鋼板至650 °C前後 時，其表面溫度和板厚中心溫度的經時變化圖。 圖1 〇為顯示使型感應加熱裝置内往複移動，分成9次加 熱20mm板厚之鋼板至650 °C前後時，其表面溫度和板厚中 心溫度的經時變化圖。 圖11為顯示一邊冷卻鋼板的端部，一邊分成6次加熱 4 0mm板厚之鋼板至65〇 i前後時，其鋼板各部溫度的經時 變化圖。528808 Brief Description of Drawings Fig. 1 is a diagram showing an example of an embodiment of a manufacturing apparatus for a thick steel plate according to the present invention. Figures 2A and 2B are graphs showing the change over time of the surface temperature and the center temperature of the plate thickness when the steel plate with an 8 mm plate thickness is divided into 1, and heated to 650 ° C before and after. Fig. 3 is a graph showing the change over time of the surface temperature of a steel plate having a plate thickness of 40 mm divided into six heating steps to 580 ° C. Fig. 4 is a view showing an example of an air jet pipe for cooling an end portion in the width direction of a steel plate. Fig. 5 is a view showing an example of a water jet nozzle for cooling the end portion in the width direction of a steel plate. Fig. 6 is a view showing an example of a water-cooled roller for cooling an end portion in the width direction of a steel plate. Fig. 7 is a graph showing the change with time of the surface temperature and the center temperature of the plate thickness when the steel plate having a plate thickness of 50 mm was heated up to about 650 ° C at one time. Fig. 8 is a graph showing the change over time of the surface temperature and the center temperature of the plate thickness when the steel plate having a plate thickness of 50 mm is heated up and down to 650 ° C in 4 times. Fig. 9 is a graph showing the change over time of the surface temperature and the center temperature of the plate thickness when the steel plate having a plate thickness of 50 mm is heated up to 650 ° C before and after being divided into six times. Fig. 10 is a graph showing the change over time of the surface temperature and the center temperature of the plate thickness when the steel plate with a thickness of 20 mm is heated up and down to 650 ° C before and after the reciprocating movement of the induction heating device is divided into nine times. Fig. 11 is a graph showing the change over time of the temperature of each part of the steel plate when the steel plate with a thickness of 40 mm is heated up to about 65 ° while the end portion of the steel plate is cooled while cooling.
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Claims (1)
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000383031 | 2000-12-18 | ||
| JP2001026387A JP4066603B2 (en) | 2001-02-02 | 2001-02-02 | Heat treatment method for steel |
| JP2001122955A JP4945853B2 (en) | 2001-04-20 | 2001-04-20 | Heat treatment method and apparatus for steel sheet |
| JP2001200936 | 2001-07-02 | ||
| JP2001223527A JP4998653B2 (en) | 2001-07-24 | 2001-07-24 | Steel plate heat treatment equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW528808B true TW528808B (en) | 2003-04-21 |
Family
ID=28457974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW090131315A TW528808B (en) | 2000-12-18 | 2001-12-18 | Method for manufacturing a steel plate and apparatus thereof |
Country Status (1)
| Country | Link |
|---|---|
| TW (1) | TW528808B (en) |
-
2001
- 2001-12-18 TW TW090131315A patent/TW528808B/en not_active IP Right Cessation
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