KR100350070B1 - Method and apparatus for manufacturing black plate by reduced process - Google Patents
Method and apparatus for manufacturing black plate by reduced process Download PDFInfo
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- KR100350070B1 KR100350070B1 KR1019970075874A KR19970075874A KR100350070B1 KR 100350070 B1 KR100350070 B1 KR 100350070B1 KR 1019970075874 A KR1019970075874 A KR 1019970075874A KR 19970075874 A KR19970075874 A KR 19970075874A KR 100350070 B1 KR100350070 B1 KR 100350070B1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/60—Aqueous agents
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/081—Iron or steel solutions containing H2SO4
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/06—Wires; Strips; Foils
- C25D7/0614—Strips or foils
Abstract
Description
본 발명은 단축공정에 의한 석도원판 제조방법 및 장치에 관한 것으로서, 보다 상세하게는 냉연강판에 주석, 크롬 등을 도금하여 제조되는 석도원판을 단축적인 연속공정에 의한 열처리 및 도금처리 과정들을 거쳐 높은 생산능률로 제조해낼 수 있는 단축공정에 의한 석도원판 제조방법 및 장치에 관한 것이다.The present invention relates to a method and apparatus for producing a stone plate by a shortening process, and more specifically, to a high degree of stone plate made by plating tin, chromium, etc. on a cold rolled steel plate through heat treatment and plating processes by a short-term continuous process. The present invention relates to a method and apparatus for producing a stone disc by a shortening process that can be manufactured with production efficiency.
일반적으로 철강용기용 재료로 사용되는 주석 또는 크롬도금 강판은 0.15~0.40mm 두께의 냉간압연강판을 상소둔 또는 연속 소둔처리하여 생산한 소둔강판을 별도의 라인에서 주석 또는 크롬도금 처리하는 공정을 거쳐 생산된다.In general, tin or chromium plated steel sheet used as a material for steel containers undergoes a process of tin or chromium plating on an annealed steel sheet produced by ordinary annealing or continuous annealing of a cold rolled steel sheet having a thickness of 0.15 to 0.40 mm. Produced.
이러한 용기용 강판의 원판을 석도원판이라고 하는데, 석도원판의 재질은 주로 HR30T로 표현되는 조질도에 따라 분류하며, 조질도 T1, T2, T2.5의 연질강판은 극저탄소강을, T3 이상의 강판은 저탄소강 및 중저탄소강을 소재로 하여 제조되는 것이 보통이다.The disc of the container steel plate is called a stone plate, and the material of the stone plate is mainly classified according to the roughness represented by HR30T, and the soft steel plates having the roughness T1, T2, and T2.5 are ultra-low carbon steel and T3 or more. Is usually manufactured from low carbon steel and medium to low carbon steel.
석도원판을 제조하는 연속소둔공정은, 도 1에 도시된 바와 같이, 냉간 압연강판의 전해청정처리 후 가열대, 균열대, 1차냉각대, 과시효대, 2차냉각대로 이루어진 소둔로에서의 열처리를 거쳐 조질압연 및 도유처리하는 방법으로 구성되는 것이 보통이다. 이때, 소둔로에서의 열처리는 강종에 따라 다소 상이하지만 가열∼냉각까지의 대략적인 처리시간이 150초 이상으로 연속소둔설비 길이의 1/3∼1/2 정도가 소둔로로 구성된다.Continuous annealing process for producing a stone plate, as shown in Figure 1, after the electrolytic cleaning treatment of cold-rolled steel sheet is subjected to heat treatment in the annealing furnace consisting of a heating table, cracking zone, primary cooling zone, overaging zone, secondary cooling zone It is usually composed of a method of rough rolling and oil treatment. At this time, the heat treatment in the annealing furnace is slightly different depending on the steel grade, but the rough processing time from heating to cooling is 150 seconds or more, and 1/3 to 1/2 of the length of the continuous annealing plant is composed of the annealing furnace.
이러한 연속소둔로를 단축적인 설비로 구성하고자 하는 방법으로서 극저탄소강을 소재로 하여 과시효대를 없애고 조질압연에 의해 석도원판의 조질도를 제어하고자 하는 방법이 알려져 있다.As a method of constructing such a continuous annealing furnace as a short-circuit facility, a method of eliminating overaging zones using ultra-low carbon steel as a material and controlling the quality of the stone disc by temper rolling is known.
또한, 연속소둔로 가열대의 초기위치에서 강판을 350℃ 정도의 온도까지 급속가열하는 것에 의해 단축적인 가열대를 구성하는 방법도 알려져 있다. 이러한 방법들은 석도원판 제조공정의 부분적인 단축은 가능하나 후술하는 본 발명에서 제안하고 있는 정도의 대폭적인 단축은 가능하지 않다는 문제점이 있다.Also known is a method of constructing a shorter heating table by rapidly heating the steel sheet to a temperature of about 350 ° C. at an initial position of the continuous annealing furnace heating table. These methods have a problem that partial shortening of the process for producing a stone disc is possible, but a significant shortening of the degree proposed in the present invention to be described later is not possible.
상기와 같은 문제점을 해결하기 위하여, 본 발명은 석도원판을 제조하는 공정 및 장치에 있어서, 단축된 열처리에 이은 산세, 도금공정으로의 직결처리로 대폭 단축시킴으로써 이러한 석도원판의 제조능률 및 생산성을 크게 향상시킬 수 있는 단축공정에 의한 석도원판 제조방법 및 장치를 제공하는데 그 목적이 있다.In order to solve the above problems, the present invention in the process and apparatus for producing a stone master disc, greatly shorten the heat treatment, followed by pickling, a direct process to the plating process greatly reduced the manufacturing efficiency and productivity of such a stone master disc It is an object of the present invention to provide a method and apparatus for producing a stone plate by a shortening process that can be improved.
도 1은 종래의 석도원판 제조공정도,1 is a conventional stone disc manufacturing process diagram,
도 2는 본 발명의 석도원판 제조공정도,2 is a process for producing a stone disc of the present invention,
도 3은 종래의 공정 및 본 발명에 따른 공정의 열처리사이클 비교 그래프,3 is a graph comparing the heat treatment cycles of the conventional process and the process according to the present invention;
도 4는 본 발명의 공정을 실행하기 위한 장치의 구성개요도.4 is a schematic diagram of an apparatus for carrying out the process of the present invention.
♣도면중 주요부분에 대한 부호의 설명 ♣♣ Explanation of symbols for main part of drawing ♣
1:유도가열부 2:기수냉각부 3:수냉각부 4:1차산세부1: Induction heating part 2: Water cooling part 3: Water cooling part 4: Primary pickling part
5:건조기 6:조질압연기 7:2차산세부 8:도금부5: Dryer 6: Rough rolling mill 7: Secondary pickle detail 8: Plating part
상기한 목적을 달성하기 위하여, 본 발명은 강판을 680℃ 이상의 온도까지 급속가열하는 단계와; 상기 급속가열된 강판을 1∼2초간의 균열처리 단계와; 상기 급속가열되어 균열처리된 강판을 기수냉각 및 수냉각으로 급속 냉각하는 단계와; 상기 급속냉각하는 단계에서 강판 표면에 형성되는 산화층을 1차 산세하여 제거하는 단계와; 상기 1차 산세된 강판을 건조하여 조질압연하는 단계와; 상기 조질압연된 강판을 2차 산세하여 도금하는 단계로 구성되는 것을 특징으로 하는 단축공정에 의한 석도원판 제조방법을 제공하며,In order to achieve the above object, the present invention comprises the steps of rapid heating the steel sheet to a temperature of 680 ℃ or more; Cracking the rapidly heated steel sheet for 1 to 2 seconds; Rapidly cooling the rapidly heated and cracked steel sheet by radiant cooling and water cooling; First pickling and removing the oxide layer formed on the surface of the steel sheet in the rapid cooling step; Drying the primary pickled steel sheet and temper rolling; It provides a method for producing a stone plate by a shortening process, characterized in that consisting of the step of secondary pickling the plated steel sheet.
또한, 본 발명은 강판을 유도가열에 의해 680℃이상의 온도까지 급속 가열하는 유도가열부와; 상기 급속가열된 강판을 급속냉각하는 기수냉각부 및 수냉각부와; 상기 급속냉각된 강판 표면상에 형성되는 산화층을 산세하여 제거하는 1차 산세부와; 상기 1차 산세된 강판을 제어된 조질도 및 표면조도로 조질압연하는 조질압연기와; 상기 조질압연된 강판을 2차 산세하는 2차 산세부와; 상기 2차 산세된 강판에 도금을 실시하는 도금부로 구성되는 것을 특징으로 하는 단축공정에 의한 석도원판 제조장치를 제공하게 된다.In addition, the present invention and the induction heating unit for rapidly heating the steel sheet to a temperature of 680 ℃ or more by induction heating; A water cooling unit and a water cooling unit for rapidly cooling the steel sheet rapidly heated; A primary pickling unit for pickling and removing an oxide layer formed on the surface of the rapidly cooled steel sheet; A temper rolling mill for temper rolling the primary pickled steel sheet with controlled temper and surface roughness; A secondary pickling unit for second pickling the temper-rolled steel sheet; It is to provide a stone plate manufacturing apparatus by a shortening process, characterized in that consisting of a plating portion for plating the secondary pickled steel sheet.
이하, 본 발명을 첨부된 도면을 참조하여 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.
도 2는 본 발명에 따른 석도원판 제조방법의 공정개요를 보여 준다. 여기에도시된 본 발명의 석도원판 제조방법에 따르면, 종래의 가열대-균열대-1차냉각대-과시효대-2차냉각대 등으로 이루어지는 긴 소둔과정과 루퍼-조질압연-코일러-언코일러-루퍼-전해청정-산세 등의 과정들을 거쳐 별도의 도금처리단계로 직결되는 종래의 제조과정들이, 유도가열-수냉각-산세-조질압연-산세를 거쳐 도금처리단계로 이어지는 대폭적으로 단축된 공정에 의해 석도원판 제조가 이루어질 수 있도록 된 것임을 알 수 있다.Figure 2 shows the process overview of the method for producing a stone disc according to the present invention. According to the method of manufacturing a stone disc of the present invention shown here, a long annealing process and a looper-temper-coiler-coiler- The conventional manufacturing process, which is directly connected to a separate plating process through processes such as looper, electrolytic cleaning, and pickling, is performed in a drastically shortened process leading to plating process through induction heating, water cooling, pickling, temper rolling, and pickling. It can be seen that it is possible to produce a stone plate by.
위와 같은 정도로 석도원판 제조공정을 단축시킴에 있어서 가장 중요한 기술적인 문제는 급속가열 및 급속냉각에 의한 소둔로의 단축화와, 이러한 단축적인 열처리과정을 거친 강판의 표면성상이 조질압연 과정에서 표면결함을 유발하지 않도록 하여 주석 또는 크롬도금에 적합하도록 처리하는 공정의 구성이라고 할 수 있다.As mentioned above, the most important technical problem in shortening the process of manufacturing a stone disc is to shorten the annealing furnace by rapid heating and rapid cooling, and that the surface properties of the steel sheet undergoing such a short heat treatment process have surface defects during temper rolling. It can be said to be a configuration of a process that is processed to be suitable for tin or chromium plating without causing it.
본 발명에서는 위와 같은 단축공정을 가능하게 하기 위한 방법으로 650℃ 이상의 고온으로 급속가열이 가능한 유도가열장치를 사용하여 강판을 급속가열한 후 1∼2초간 균열처리하고, 이어서 기수냉각 및 수냉각에 의해 급속냉각하는 열처리사이클에 의해 기존의 재질과 동등한 석도원판을 제조해내도록 하였으며, 반복적인 연구실험을 통해 그 가능성을 확인하였다.In the present invention, by using the induction heating apparatus capable of rapid heating at a high temperature of 650 ℃ or more as a method for enabling the shortening process as described above, the steel sheet is rapidly heated and then cracked for 1 to 2 seconds, and then subjected to water cooling and water cooling. By using a heat-treatment cycle of rapid cooling by means of producing a stone plate equivalent to the existing material, the possibility was confirmed through repeated research experiments.
도 3의 그래프는 본 발명의 제조공정에 의한 열처리사이클(A)과 기존의 제조공정에 의한 열처리사이클(B)을 비교 도시한 것이다.The graph of FIG. 3 compares the heat treatment cycle (A) by the manufacturing process of the present invention with the heat treatment cycle (B) by the conventional manufacturing process.
실험결과, 도 3의 A와 같은 열처리사이클에 의해 기존공정의 열처리 사이클(B)에 의해 만들어지는 석도원판과 동등한 품질의 석도원판을 제조하기 위해서는 보다 연질의 강판을 소재로 하여 기존의 열처리온도보다 약 20∼50℃ 높은 온도인 680∼780℃까지 급속가열후 냉각하는 방법이 효과적인 것으로 확인되었다.As a result of the experiment, in order to manufacture a stone plate of the same quality as the stone plate made by the heat treatment cycle (B) of the existing process by the heat treatment cycle as shown in Figure 3 A of a softer steel plate as a material than the conventional heat treatment temperature The rapid heating to 680-780 ° C., which is about 20-50 ° C. high temperature, was found to be effective.
기존의 공정에서는 조질도 T3재의 생산시 극저탄소강을 과시효 없이 소둔후 5% 이상 조질압연하거나 저탄소강을 90초 이상의 과시효처리하여 석도원판을 제조하지만, 본 발명의 단축공정에서는 극저탄소강 또는 중저탄소강 또는 저탄소강에 Mn, Cr등의 고용강화원소를 0.05∼0.50wt% 첨가하고, 720∼780℃까지 급속가열 후 냉각하는 방법에 의해 기존과 동일한 석도원판을 제조할 수 있다.In the existing process, the ultra low carbon steel is annealed without excessive aging in the production of crude T3 material, and then rough rolled by 5% or more, or the low carbon steel is overaged for 90 seconds or more, but in the shortening process of the present invention, ultra low carbon steel Alternatively, by adding a 0.05 ~ 0.50wt% solid solution strengthening elements such as Mn, Cr, etc. to the low-low carbon steel or low carbon steel, rapid heating to 720 ~ 780 ℃ after cooling method can be prepared the same stone plate.
또한, T1∼T2.5 재질의 석도원판의 경우 C:0.01wt%이하, Mn:0.01∼0.05wt%, Si:0.01wt%이하, Ti:0.001∼0.005wt% 또는 Nb:0.001∼0.002wt%를 함유한 극저탄소강을, T4∼T6재질의 석도원판의 경우에는 C:0.01∼0.08wt, Mn:0.01∼0.50wt%를 함유한 저탄소강 또는 중저탄소강을 소재로 하여 도 3의 A와 같은 단축적인 열처리사이클에 의해 기존 공정과 동등 재질의 석도원판을 제조하는 것이 가능하다.In addition, in the case of T1 to T2.5 material of negative stone, C: 0.01 wt% or less, Mn: 0.01 to 0.05 wt%, Si: 0.01 wt% or less, Ti: 0.001 to 0.005 wt%, or Nb: 0.001 to 0.002 wt% In the case of ultra-low carbon steel containing a low carbon steel or a medium-low carbon steel containing C: 0.01 to 0.08wt and Mn: 0.01 to 0.50wt% in the case of T4 to T6 material of a fine stone, By shortening the heat treatment cycle, it is possible to manufacture the stone plate of the same material as the existing process.
한편, 위와 같은 단축 열처리사이클에 의한 강판의 열처리시 수냉각 등에 의해 강판 표면에 형성되는 산화층은 조질압연시 표면결함을 유발하는 윈인으로 되므로, 약산성 용액에서의 침지 및 전해처리를 통해 제거할 필요가 있다. 석도강판의 제조공정에서는 도금액으로 황산계의 용액이 사용되므로 이러한 산세처리는 약 5% 황산을 사용하는 것이 적합하다.On the other hand, since the oxide layer formed on the surface of the steel sheet by water cooling during heat treatment of the steel sheet by the uniaxial heat treatment cycle as described above becomes a cause of surface defects during temper rolling, it is necessary to remove it by immersion and electrolytic treatment in a weakly acidic solution. have. Since the sulfuric acid solution is used as the plating solution in the manufacturing process of the masonry steel sheet, it is suitable to use about 5% sulfuric acid for this pickling treatment.
또한, 산세처리 후 조질압연을 위해서는 수세 및 건조공정이 필요하다. 조질압연 후 2차 산세는 기존의 공정에서와 같이 약 5% 황산용액에서의 침지 또는 전해처리를 행한다. 이러한 단축 직결공정의 구성에 의해 기존 공정의 도유∼전해청정까지의 생략이 가능하다.In addition, for the rough rolling after pickling treatment, washing and drying process is required. After crude rolling, secondary pickling is performed by dipping or electrolytic treatment in about 5% sulfuric acid solution as in the conventional process. By the construction of such a short-circuit direct connection process, it is possible to omit existing oiling to electrolytic cleaning.
도 4는 위와 같은 본 발명의 단축된 석도원판 제조공정을 실행하기 위한 장치의 구성개요를 보여 준다.Figure 4 shows the configuration of the apparatus for performing the shortened stone disk manufacturing process of the present invention as described above.
극저탄소강 또는 중저탄소강 또는 저탄소강의 냉연강판(S)은 먼저 유도가열부(1)에서 680℃ 이상의 온도까지 급속가열된 후 1∼2초간 균열처리된다. 이와 같이 급속가열 및 균열처리된 강판은 다시 기수냉각부(2)와 수냉각부(3)를 거치면서 급속냉각되며, 이 때 형성되는 강판 표면상의 산화층 제거를 위해 1차 산세부(4)에서 약 5%농도의 황산(H2SO4)용액으로 침지처리 및 수세를 행한다. 이러한 1차 산세부(4)에서의 산세처리는 강판 표면 산화층에 의한 조질압연시의 표면결함 방지에 중요한 역할을 한다. 이와 같이 1차 산세부(4)를 거친 강판은 건조기(5)를 통해 건조되고, 건조된 강판은 조질압연기(6)에서의 조질압연을 통해 조질도와 표면조도가 제어된 다음, 2차 산세부(7)에서 약 5%농도의 H2SO4용액으로 침지처리 또는 전해처리된 후 주석 또는 크롬 도금부(8)로 직송처리될 수 있다.The cold rolled steel sheet (S) of the ultra low carbon steel or the low carbon steel or the low carbon steel is first rapidly heated to a temperature of 680 ° C. or higher in the induction heating unit 1, and then cracked for 1 to 2 seconds. The steel plate subjected to the rapid heating and cracking treatment is rapidly cooled again through the
바람직한 실시예에 있어서, 상기 유도가열부(1)는 강판을 큐리점 이하의 온도까지 급속가열하는 유도가열수단(Axial-Type Induction Heater) 및 큐리점이상의 온도까지 급속가열하는 유도가열수단(Transverse Flux Induction Heater)의 조합구성으로 된다.In a preferred embodiment, the induction heating unit (1) is an induction heating means (Axial-Type Induction Heater) for rapid heating the steel sheet to a temperature below the Curie point and the induction heating means (Transverse Flux) for rapid heating up to a temperature above the Curie point Induction Heater) is a combination.
상술한 바와 같은 본 발명은 냉연강판에 대한 긴 시간의 열처리와 별도의 도금라인에서의 도금처리를 행하도록 된 기존의 석도원판 제조공정을 약 20초간의 단축된 열처리에 이은 산세, 도금공정으로의 직결처리로 대폭 단축시킴으로써 이러한 석도원판의 제조능률 및 생산성을 크게 향상시킬 수 있는 효과를 제공하는 것이다.As described above, the present invention is a process for producing a pre-prepared stoneware disc for a long time heat treatment for a cold rolled steel sheet and plating in a separate plating line, followed by a short heat treatment for about 20 seconds, followed by a pickling and plating process. By drastically shortening the direct treatment is to provide an effect that can significantly improve the production efficiency and productivity of such a stone master disk.
Claims (6)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970075874A KR100350070B1 (en) | 1997-12-29 | 1997-12-29 | Method and apparatus for manufacturing black plate by reduced process |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1019970075874A KR100350070B1 (en) | 1997-12-29 | 1997-12-29 | Method and apparatus for manufacturing black plate by reduced process |
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| KR100350070B1 true KR100350070B1 (en) | 2002-12-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60262918A (en) * | 1984-06-08 | 1985-12-26 | Kawasaki Steel Corp | Manufacture of surface treating raw sheet without causing stretcher strain |
| JPH02129319A (en) * | 1988-11-10 | 1990-05-17 | Kawasaki Steel Corp | Production of raw plate for surface treated steel plate |
| KR970027345A (en) * | 1995-11-30 | 1997-06-24 | 김종진 | Surface treatment disc for D & I excellent in pressure resistance and its manufacturing method |
| KR970033130A (en) * | 1995-12-18 | 1997-07-22 | 김종진 | Manufacturing method of fine stone disc for excellent strain resistance |
-
1997
- 1997-12-29 KR KR1019970075874A patent/KR100350070B1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60262918A (en) * | 1984-06-08 | 1985-12-26 | Kawasaki Steel Corp | Manufacture of surface treating raw sheet without causing stretcher strain |
| JPH02129319A (en) * | 1988-11-10 | 1990-05-17 | Kawasaki Steel Corp | Production of raw plate for surface treated steel plate |
| KR970027345A (en) * | 1995-11-30 | 1997-06-24 | 김종진 | Surface treatment disc for D & I excellent in pressure resistance and its manufacturing method |
| KR970033130A (en) * | 1995-12-18 | 1997-07-22 | 김종진 | Manufacturing method of fine stone disc for excellent strain resistance |
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