KR100509618B1 - cool enamel steel plate manufacture method - Google Patents
cool enamel steel plate manufacture method Download PDFInfo
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- KR100509618B1 KR100509618B1 KR10-2000-0077354A KR20000077354A KR100509618B1 KR 100509618 B1 KR100509618 B1 KR 100509618B1 KR 20000077354 A KR20000077354 A KR 20000077354A KR 100509618 B1 KR100509618 B1 KR 100509618B1
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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
- B21B1/227—Surface roughening or texturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/005—Rolls with a roughened or textured surface; Methods for making same
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/56—Elongation control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
- B23H9/008—Surface roughening or texturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
- B23H9/04—Treating surfaces of rolls
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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
- B21B2001/221—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 by cold-rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/18—Elongation
Abstract
본 발명은 강판의 평균 표면조도가 2~4㎛, PPI(Peaks Per Inch)가 85이상인 하이 러프니스(HIGH ROUGHNESS) 냉연 법랑 강판을 제조하는 방법에 관한 것으로, 조질압연 워크 롤(WORK ROLL)의 덜(DULL)조도 EDT(ELECTRIC DISCHARGE TEXTURE) 가공시 전류(CURRENT)를 8A 이상, 온/오프 타임(ON/OF TIME)을 150~200/40~50㎲로 설정하는 과정과, 6.0~8.0㎛ 범위의 롤(ROLL) 조도를 확보하는 과정과, 두께 ±0.3% 의 연신율로 조질압연하는 과정과, 상기 조질압연후 강판표면의 표면조도가 2.0~4.0㎛, PPI(Peaks Per Inch)가 85이상이 되도록 하는 과정을 포함하여 이루어짐으로써, 강판 자체의 재질은 소강성분 및 열연 냉연에서의 작업조건에 의해서 결정되며, 표면조도는 냉간압연 및 조질압연 과정에서의 워크롤(WORK ROLL) 조도 전사에 의해 결정되는데, 법랑강판의 표면조도가 매우 높은 경우에는 윤활 역할을 하는 방청유가 표면에 충분히 전류함으로 인해 프레스(PRESS) 작업시 금형과 소지강판 사이의 마찰계수를 감소시켜 프레스 성형성을 한층 더 높일수 있으므로 인해 고가공성 법랑강판의 소지강판으로 사용될 수 있다. The present invention relates to a method for manufacturing a high roughness (EN) cold rolled enamel steel sheet having an average surface roughness of 2 to 4 µm and a PPI (Peaks Per Inch) of 85 or more. When setting DULL roughness EDT (ELECTRIC DISCHARGE TEXTURE) processing, set CURRENT more than 8A, ON / OFF TIME to 150 ~ 200/40 ~ 50㎲, 6.0 ~ 8.0㎛ The process of securing the roll roughness of the range, the process of temper rolling with elongation of ± 0.3% thickness, the surface roughness of the steel plate surface after the temper rolling is 2.0 ~ 4.0㎛, PPI (Peaks Per Inch) is more than 85 By including the process to ensure that, the material of the steel sheet itself is determined by the working conditions in the steel composition and hot rolled cold rolling, the surface roughness by the transfer of work roll roughness in cold rolling and temper rolling If the surface roughness of the enamel steel sheet is very high, Since cheongyu due to the current on the surface by sufficiently decreasing the friction coefficient between the press (PRESS) operation when the mold and the steel sheet possessing nopilsu Furthermore the press formability because of the possession of the steel sheet can be used as the high-porous enamel steel sheet.
Description
본 발명은 법랑재의 소지강판으로 사용되는 냉연강판의 표면조도 및 가공특성에 관한 것으로, 특히 강판의 평균 표면조도가 2~4㎛, 피피아이(이하 "PPI:Peaks Per Inch"라 함)가 85이상인 하이 러프니스(HIGH ROUGHNESS) 냉연 법랑 강판을 제조하는 방법에 관한 것이다. The present invention relates to the surface roughness and processing characteristics of the cold-rolled steel sheet used as a base steel sheet of enamel material, in particular, the average surface roughness of the steel sheet 2 ~ 4㎛, PPI (hereinafter referred to as "PPI: Peaks Per Inch") 85 The present invention relates to a method for producing a high roughness (HIGH ROUGHNESS) cold rolled enamel steel sheet.
일반적으로 법랑강판은 소지강판인 냉연강판 위에 유리질 유약을 도포한후 800℃이상의 고온에서 소성시켜 내식성, 내후성,내열성 등을 높게한 일종의 표면처리 제품으로 건축외장용, 가전용, 식기용 등에 주로 사용되고 있다. 특히 욕조용에 사용되는 법랑강판은 표면외장성 뿐만 아니라 고가공성을 요구하므로 소지강판 자체의 재질 및 표면조도 특성이 매우 중요하다. In general, enamel steel sheet is a kind of surface treatment product that has high corrosion resistance, weather resistance, and heat resistance by applying glass glaze on cold rolled steel sheet, which is a base steel sheet, and then baking it at a high temperature of 800 ℃ or higher. . In particular, the enameled steel sheet used for the bath requires not only surface appearance but also high workability, so the material and surface roughness characteristics of the steel sheet itself are very important.
또한, 법랑재의 경우는 냉연 소지강판을 원하는 형태로 프레스(PRESS) 성형한 후에 법랑유액을 도포하여, 상기와 같이 800℃이상의 고온에서 소성시켜 내식성,내후성 및 내열성등을 확보한다. 그러므로 소지강판인 냉연강판의 가공성이 충분하지 못하면, 프레스 가공시 넥킹(NECKING) 및 가공 크랙(CRACK) 등의 품질 문제점이 야기되어 원하는 형태의 성형품을 제작하지 못하게 된다.In addition, in the case of enamel material, the cold rolled steel sheet is pressed into a desired shape, and then the enamel emulsion is applied, and then fired at a high temperature of 800 ° C. or higher to secure corrosion resistance, weather resistance, and heat resistance. Therefore, if the workability of the cold rolled steel sheet is a steel sheet is not enough, the quality problems such as necking (NECKING) and processing cracks (CRACK) during the press work is caused, it is impossible to produce a molded article of the desired shape.
가공성은 화학성분 및 제조이력에 좌우되는 소지강판 자체의 재질특성 뿐만아니라, 금형과 소지강판의 마찰특성도 큰 영향을 미치는데, 기존의 법랑강판의 경우는 소지강판 자체의 재질특성에 의한 가공성에 의존함으로 인해 재질편차를 가지고 공급된 법랑용 소지강판에 프레스 금형조건(BLANK HOLD FORCE, STROKE PER MINETE, 금형형상 등)을 조정한 후에 프레스 작업을 실시하고 있으며, 새로운 소재 공급시에는 프레스 작업조건 조정 및 장시간의 시험과정을 통해 성형 가능여부 판단이 이루어지고 있어 소지강판의 재질 편차가 넓게 분포될 경우에는 프레스 가공시 일부 가공불량을 야기하게 된다. In addition to the material properties of the steel sheet itself, which depends on the chemical composition and the manufacturing history, the friction characteristics between the mold and the steel sheet have a great influence. In the case of conventional enamel steel sheets, the workability of the steel sheet itself depends on the workability. Due to the dependence, press work is performed after adjusting press mold conditions (BLANK HOLD FORCE, STROKE PER MINETE, mold shape, etc.) on enameled steel sheet supplied with material deviation. And it is judged whether or not molding is possible through a long test process, if the material deviation of the steel sheet is widely distributed will cause some processing failure during the press working.
또한 표면 조도 특성이 일반 냉연강판과 동일한 0.7~1.3㎛ 수준으로 부여되고 있는데 현재 법랑강판의 경우 조질압연 작업시 워크롤 조도를 숏 블라스트(SHOT BLAST) 방식의 경우 2.4±0.2㎛ 수준으로 덜(DULL) 가공하고, 이디티(이하 "EDT:ELECTRIC DISCHARGE TEXTURE"라 함) 방식의 경우는 2.3±0.2㎛ 수준으로 덜(DULL)가공하여 강판 표면의 조도를 0.7~1.3㎛ 관리범위 내에서 부여되므로 금형과 소지강판의 마찰특성 개선에 의한 가공범위 향상 효과를 기대할 수 없다. In addition, surface roughness characteristics are given at the same level of 0.7 ~ 1.3㎛ as that of general cold rolled steel sheet. Currently, enameled steel sheet has less work roll roughness at 2.4 ± 0.2㎛ level in the case of shot blasting. ) And in the case of the identity (hereinafter referred to as "EDT: ELECTRIC DISCHARGE TEXTURE"), the roughness of the surface of the steel sheet is given within the control range of 0.7 ~ 1.3㎛ by performing the DULL processing at 2.3 ± 0.2㎛ level. It is not possible to expect the effect of improving the working range due to the improvement of the friction characteristics of steel sheets.
따라서, 본 발명은 상기와 같은 종래의 문제점을 해소하기 위해 창안된 것으로서, 냉간압연기 및 조질압연기의 워크롤(WORK ROLL) 조도 가공조건 설정을 통해 강판 표면조도를 높게 덜(DULL) 가공함으로써 표면 마찰계수 감소 및 가공성이 우수한 하이 러프니스(HIGH ROUGHNESS) 법랑강판을 제조함에 그 목적이 있다.Therefore, the present invention was devised to solve the above-mentioned problems, and the surface friction by processing the surface roughness of the steel sheet to high (DULL) by setting the work roll roughness processing conditions of the cold rolling mill and the rough rolling mill The purpose is to produce a high roughness (HIGH ROUGHNESS) enamel steel sheet excellent in modulus reduction and workability.
이하, 첨부도면을 참조하여 본 고안에 따른 바람직한 실시예에 대하여 상세히 설명한다. Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.
본 발명에 의한 냉연 법랑 강판의 실시예는, An embodiment of a cold rolled enamel steel sheet according to the present invention,
조질압연 워크 롤(WORK ROLL)의 덜(DULL)조도 EDT 가공시 전류(CURRENT)를 8A 이상, 온/오프 타임(ON/OF TIME)을 150~200/40~50㎲로 설정하는 과정과,DULL roughness of work roll (WORK ROLL) The process of setting the current (CURRENT) to 8A or more and ON / OF TIME to 150 ~ 200/40 ~ 50㎲ during EDT machining,
6.0~8.0㎛ 범위의 롤(ROLL) 조도를 확보하는 과정과, To secure the roll roughness in the range of 6.0 ~ 8.0㎛,
두께 ±0.3% 의 연신율로 조질압연하는 과정과, Temper rolling with elongation of ± 0.3% of thickness,
상기 조질압연후 강판표면의 표면조도가 2.0~4.0㎛, PPI(Peaks Per Inch)가 85이상이 되도록 하는 과정을 포함하여 이루어짐이 바람직하다.After the temper rolling, the surface roughness of the surface of the steel sheet is preferably 2.0 to 4.0 μm, including PPI (Peaks Per Inch) of 85 or more.
도 1 은 본 발명에 적용되는 롤 조도 조건에 따른 법랑강판의 표면조도 수준을 나타낸 테이블도이고, 도 2 는 본 발명에 적용되는 강판 표면조도 확보를 위한 롤 가공조건의 테이블도이며, 도 3 은 본 발명에 적용되는 법랑강판 제조를 위한 롤 조도 및 표면조도의 테이블도이고, 도 4 는 본 발명에 적용되는 냉연 법랑강판 제조방법의 흐름도로서, 이를 참조하여 설명하면 다음과 같다.1 is a table showing the surface roughness level of the enamel steel sheet according to the roll roughness conditions applied to the present invention, Figure 2 is a table view of the roll processing conditions for securing the surface roughness applied to the present invention, Figure 3 Table is a roll roughness and surface roughness for producing an enamel steel sheet applied to the present invention, Figure 4 is a flow chart of a cold rolled enamel steel sheet manufacturing method applied to the present invention will be described with reference to the following.
냉연강판의 표면조도는 피시엠(PCM) 최종 스탠드(FINAL STAND)의 워크롤(WORK ROLL) 조도와 연속소둔라인의 조질압연기 워크롤 조도가 압연시에 수직방향의 롤힘(ROLL FORCE)에 의해 강판 표면위로 전사되면서 생성된다. 특히 조질압연기 워크롤 조도의 냉연강판 표면 위로의 전사율이 35~45％에서 이루어지므로 워크롤 조도 설정 및 조질압연기(SPM) 작업조건 설정이 냉연 법랑강판의 표면조도를 결정하는데 중요한 요인으로 작용한다.The surface roughness of the cold rolled steel sheet is determined by the work roll roughness of the final stand of PCM and the rough roll work roll roughness of the continuous annealing line due to the vertical roll force. It is produced by transferring onto the surface. In particular, since the transfer rate on the cold rolled steel sheet surface of the rough rolling work roll roughness is 35 ~ 45%, the setting of the work roll roughness and SPM working condition is an important factor in determining the surface roughness of the cold rolled enamel steel sheet. .
강판 표면조도를 2.0~4.0㎛ 수준으로 확보하기 위해서는 조질압연전 원판인 풀하드(FULL HARD)재의 표면조도를 0.7~1.3㎛ 수준에서 확보하고 조질압연시는 전사율 35~45%를 고려하여 SPM작업조건 설정 및 워크롤 조도를 상당히 높게 관리해야 하므로 롤의 덜(DULL) 조도 가공시 숏 블라스트(SHOT BLAST) 또는 EDT 방식으로 6㎛ 이상의 높은 롤 조도를 덜(DULL)가공 하여야 한다.In order to secure the surface roughness of steel sheet to 2.0 ~ 4.0㎛ level, secure the surface roughness of FULL HARD material, which is the original plate before temper rolling, at 0.7 ~ 1.3㎛ level, and apply SPM considering the transfer rate of 35 ~ 45% during temper rolling. Since the working condition setting and the work roll roughness must be managed considerably high, the high roll roughness of 6 μm or more should be processed less by the shot blast or EDT method when the roughness of the roll is processed.
이를 위한 기술의 핵심은 최종 냉간 법랑강판의 표면조도를 2.0~4.0㎛ 수준으로 확보하기 위해 냉간압연기 최종 스탠드(FINAL STAND)의 워크롤 표면조도를 1.8~2.6㎛ 수준으로 덜(DULL) 가공한후 0.7~1.3㎛의 표면조도를 가진 풀하드(FULL HARD)재를 생산하고 조질압연기의 워크롤 조도를 EDT 방식으로 6.0~8.0㎛ 수준으로 높게 덜(DULL) 가공된 워크롤로서 연신율을 두께 ±0.3% 범위에서 조질압연하는 방법으로 구성된다.The core of the technology for this purpose is to reduce the surface roughness of the final cold enameled steel sheet to 2.0 ~ 4.0㎛ level, and then finish the work roll surface roughness of the final stage of cold rolling mill to 1.8 ~ 2.6㎛ level. Produces full hard materials with a surface roughness of 0.7 ~ 1.3㎛ and the work roll roughness of the temper rolling mill is highly processed with EDT method at 6.0 ~ 8.0㎛ level. It consists of a method of temper rolling in the% range.
그리고, 냉연강판은 욕조용 법랑강판으로 사용되는 1.5t 두께로 하였으며 극저 법랑용 냉연강판 제조시 통상적으로 사용되는 냉간압연율 70％, 조질압연 연신율 1.3％를 적용하였고, 냉간압연기 최종 스탠드(FINAL STAND)의 워크롤은 기계적 방식인 숏 블라스트 방식으로 가공된 롤로, 조질압연 워크롤은 전기적 방식인 EDT방식으로 가공된 롤을 적용하였다.The cold rolled steel sheet was 1.5t thick used as an enameled steel sheet for bathtubs, and cold rolled steel 70% and tempered rolled elongation 1.3% were applied to manufacture cold rolled steel sheets for ultra-low enamel.FINAL STAND ) Is a roll processed by a mechanical shot blasting method, and a rolled work roll was applied by an electrical EDT method.
도 1은 본 발명의 하이 러프니스 표면조도 기준을 만족시키는 발명강과 비교강의 조도실적을 나타낸 것이다. 비교강1,2는 기존 생산되고 있는 표면조도 0.7~1.3㎛, 1.0~1.8㎛ 수준의 제품이며, 비교3강은 숏 블라스트 방식으로 워크롤 조도를 최대한 가공한 실적이나, 6㎛ 이상의 롤 조도를 얻는데는 실패 하였으며, 발명강1,2,3,4은 하이 러프니스 및 85이상의 PPI를 만족하는 강으로써 롤 조도 실적 및 법랑강판의 표면조도를 보여주고 있다.1 shows the roughness performance of the inventive steel and the comparative steel satisfying the high roughness surface roughness criterion of the present invention. Comparative steels 1 and 2 are products with surface roughness of 0.7 ~ 1.3㎛ and 1.0 ~ 1.8㎛, which are produced in the past, and comparative steel 3 has the results of processing the work roll roughness with the short blast method as much as possible. It failed to obtain, and the invention steels 1, 2, 3, and 4 are steels that satisfy high roughness and PPI of more than 85, showing roll roughness performance and surface roughness of enameled steel sheet.
도 2는 상기 본발명과 비교강의 롤 조도를 확보하기 위한 EDT 가공조건으로 전류(CURRENT)를 8A 이상, ON-TIME 시간도 150㎲ 이상 설정함으로써 6㎛ 이상의 덜(DULL) 표면조도를 확보하는 할 수 있었다. 이렇게 가공된 롤로 연신율은 두께 ±0.3% 수준에서, SPM 롤힘(ROLL FORCE)은 150~250톤 조건으로 조질압연 작업을 실시함으로써 표면조도가 Ra 2.0~4.0㎛, PPI 85이상인 냉연 법랑강판을 얻을수 있었다. Figure 2 is to secure the DULL surface roughness of 6㎛ or more by setting the current (CURRENT) more than 8A, the ON-TIME time more than 150㎲ as EDT processing conditions for securing the roll roughness of the present invention and comparative steel Could. As a result of the rolled process, the elongation was ± 0.3% in thickness and the SPM roll force was tempered at 150 ~ 250 tons to obtain cold rolled enamel steel with surface roughness Ra 2.0 ~ 4.0㎛ and PPI 85 or more. .
도 3은 현재 생산되고 있는 기존 법랑재와 발명강인 하이 러프니스(HIGH ROUGHNESS) 법랑강판을 제조하기 위한 냉간압연 및 조질압연기 워크롤 조도 및 강판 표면조도 관리기준을 나타낸다. Figure 3 shows the cold rolled and tempered rolling mill work roll roughness and steel sheet surface roughness management standards for manufacturing the existing high-enamel steel enamel steel and the high-strength (ENGH ROUGHNESS) enamel steel that is currently produced.
도 4는 조질압연 워크 롤(WORK ROLL)의 덜(DULL)조도 EDT 가공시 전류(CURRENT)를 8A 이상, 온/오프 타임(ON/OF TIME)을 150~200/40~50㎲로 설정하고(s10), 6.0~8.0㎛ 범위의 롤(ROLL) 조도를 확보한후 두께 ±0.3% 의 연신율로 조질압연하며(s20∼s30), 상기 조질압연후 강판표면의 표면조도가 2.0~4.0㎛, PPI(Peaks Per Inch)가 85이상이 되도록 한다(s40). FIG. 4 shows the current (CURRENT) of 8 A or more and the ON / OF TIME of 150 to 200/40 to 50 ms when the DULL roughness EDT processing of the temper rolling work roll is performed. (s10), after securing a roll roughness in the range of 6.0 ~ 8.0㎛ and rough rolling at an elongation of ± 0.3% of the thickness (s20 ~ s30), the surface roughness of the surface of the steel sheet after the temper rolling, 2.0 ~ 4.0㎛, PPI (Peaks Per Inch) is to be more than 85 (s40).
이상에서 설명한 바와 같이 본 발명에 의하면, 강판 자체의 재질은 소강성분 및 열연 냉연에서의 작업조건에 의해서 결정되며, 표면조도는 냉간압연 및 조질압연 과정에서의 워크롤 조도 전사에 의해 결정되는데, 법랑강판의 표면조도가 매우 높은 경우에는 윤활 역할을 하는 방청유가 표면에 충분히 전류함으로 인해 프레스 작업시 금형과 소지강판 사이의 마찰계수를 감소시켜 프레스 성형성을 한층 더 높일수 있으므로 인해 고가공성 법랑강판의 소지강판으로 사용될 수 있다.As described above, according to the present invention, the material of the steel sheet itself is determined by the operating conditions in the small steel component and hot rolled cold rolling, and the surface roughness is determined by the transfer of the work roll roughness in the cold rolling and temper rolling. If the surface roughness of the steel sheet is very high, the rust-preventive oil acts as a lubrication enough current on the surface, which reduces the coefficient of friction between the mold and the steel sheet during press work, thereby further increasing the press formability. It can be used as a steel sheet.
도 1 은 본 발명에 적용되는 롤 조도 조건에 따른 법랑강판의 표면조도 수준을 나타낸 테이블도.1 is a table showing the surface roughness level of the enamel steel sheet according to the roll roughness conditions applied to the present invention.
도 2 는 본 발명에 적용되는 강판 표면조도 확보를 위한 롤 가공조건의 테이블도.Figure 2 is a table of the roll processing conditions for securing the steel sheet surface roughness applied to the present invention.
도 3 은 본 발명에 적용되는 법랑강판 제조를 위한 롤 조도 및 표면조도의 테이블도. Figure 3 is a table of roll roughness and surface roughness for the production of enamel steel sheet applied to the present invention.
도 4 는 본 발명에 적용되는 냉연 법랑강판 제조방법의 흐름도.Figure 4 is a flow chart of a cold rolled enamel steel sheet manufacturing method applied to the present invention.
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| KR101372750B1 (en) | 2012-07-05 | 2014-03-10 | 주식회사 포스코 | Resin coating steel sheet with superior mottling resistance and method for manufacturing the same |
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| JPS5497527A (en) * | 1978-01-20 | 1979-08-01 | Nippon Steel Corp | Production of cold rolled steel plate having excellent phosphate treatment adaptability |
| JPS5528375A (en) * | 1978-08-22 | 1980-02-28 | Kawasaki Steel Corp | High tensile steel plate excelling in pressabillity, especially in shape freezability and production thereof |
| JPS63143272A (en) * | 1986-12-04 | 1988-06-15 | Kawasaki Steel Corp | Production of enameled steel sheet having excellent press formability and enamel adhesion |
| KR100285646B1 (en) * | 1996-10-30 | 2001-05-02 | 이구택 | Method for manufacturing cold rolled steel sheet having controlled surface |
| KR100325540B1 (en) * | 1997-12-23 | 2002-07-22 | 포항종합제철 주식회사 | Method for manufacturing cold rolled steel sheet for automobile and electric home appliance panel with excellent image clarity |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5497527A (en) * | 1978-01-20 | 1979-08-01 | Nippon Steel Corp | Production of cold rolled steel plate having excellent phosphate treatment adaptability |
| JPS5528375A (en) * | 1978-08-22 | 1980-02-28 | Kawasaki Steel Corp | High tensile steel plate excelling in pressabillity, especially in shape freezability and production thereof |
| JPS63143272A (en) * | 1986-12-04 | 1988-06-15 | Kawasaki Steel Corp | Production of enameled steel sheet having excellent press formability and enamel adhesion |
| KR100285646B1 (en) * | 1996-10-30 | 2001-05-02 | 이구택 | Method for manufacturing cold rolled steel sheet having controlled surface |
| KR100325540B1 (en) * | 1997-12-23 | 2002-07-22 | 포항종합제철 주식회사 | Method for manufacturing cold rolled steel sheet for automobile and electric home appliance panel with excellent image clarity |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101372750B1 (en) | 2012-07-05 | 2014-03-10 | 주식회사 포스코 | Resin coating steel sheet with superior mottling resistance and method for manufacturing the same |
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