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PT1662013E - Process of producing steel strips suitable for an oxidation-resisting surface coating - Google Patents

Process of producing steel strips suitable for an oxidation-resisting surface coating Download PDF

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Publication number
PT1662013E
PT1662013E PT04425880T PT04425880T PT1662013E PT 1662013 E PT1662013 E PT 1662013E PT 04425880 T PT04425880 T PT 04425880T PT 04425880 T PT04425880 T PT 04425880T PT 1662013 E PT1662013 E PT 1662013E
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PT
Portugal
Prior art keywords
thickness
type
cold
reduction
strips
Prior art date
Application number
PT04425880T
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Portuguese (pt)
Inventor
Giovanni Arvedi
Original Assignee
Giovanni Arvedi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Giovanni Arvedi filed Critical Giovanni Arvedi
Publication of PT1662013E publication Critical patent/PT1662013E/en

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Classifications

    • 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
    • B21B1/28—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 by cold-rolling, e.g. Steckel cold mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B21B13/147—Cluster mills, e.g. Sendzimir mills, Rohn mills, i.e. each work roll being supported by two rolls only arranged symmetrically with respect to the plane passing through the working rolls
    • 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
    • B21B1/30—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 non-continuous process
    • B21B1/32—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 non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/36—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 non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by cold-rolling

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Heat Treatment Of Steel (AREA)
  • Chemically Coating (AREA)

Abstract

A process is described for producing steel strips suitable for receiving a surface coating which is resisting to oxidation, in particular tin plating, of medium productivity, that does not require for its execution plants extended of a large areas or involving high economical investments. It comprises, starting from pickled hot strips having a thickness ‰¥ 0.7 mm, preferably obtained from thin-slab plants, a single cold rolling step by passing through not more than three stands of the Sendzimir 6Zhi type for the cold reduction of thickness to less than 0.25 mm and subsequent annealing. It is possible to obtain final thicknesses ‰¤ 0.18 mm both by simple reduction, which only provides subsequent skin-passing and finishing steps, and by double reduction on half-raw strip, which provides subsequent passes for thickness reduction of 30%.

Description

49954995

DESCRIÇÃODESCRIPTION

PROCESSO DE PRODUÇÃO DE TIRAS DE AÇO ADEQUADAS PARA UM REVESTIMENTO DE SUPERFÍCIE RESISTENTE Ã OXIDAÇÃO 0 presente invento refere-se a um processo para fabricar tiras de aço, adaptadas para receberem um revestimento de superfície que é resistente à oxidação, utilizando elementos antioxidantes tais como alumínio, crómio ou níquel, cobre, etc., e, em particular, estanho, para fabricar folha-de-flandres. Como é sabido, para depositar os metais de revestimento acima mencionados é utilizado o processo electrolítico ou, sempre que possível, processos de tratamento a quente. São conhecidas grandes instalações deste tipo com elevada produtividade, para as quais são necessárias áreas consideravelmente grandes e investimentos muito avultados, sendo proporcionada uma alternativa válida para instalações com produtividade média (cerca de 200.000 tons/ano), que são adequadas para serem combinadas com instalações do tipo Mini-Mills, e esta é a tecnologia à qual o presente invento se dirige, em vez de instalações e processos relevantes de elevada produção do tipo conhecido, em que as chapas, para obtenção da folha-de-flandres, são produzidas geralmente a partir de chapas quentes com uma espessura de cerca de 2 mm e levadas, subsequentemente, à espessura final através de duas fases distintas de enrolamento a frio, uma dos quais 1 4995 por meio de quatro fresas de enrolamento do tipo em série "High-Four” com 4-5 carrinhos, quer alinhados com a linha de decapagem, quer fora de linha, como é revelado na Patente GB-l-A 027495, ainda com o mesmo tipo e número de carrinhos. O segundo passo de enrolamento a frio ocorre após a têmpera com 2-3 carrinhos do tipo High-Four para levar a chapa a uma espessura final de 0,14 - 0,18 mm antes do revestimento a estanho. A Figura 1 ilustra esquematicamente uma instalação deste tipo e, como já referido, o seu principal limite é o da dimensão, uma vez que se estende ao longo de áreas muito grandes, tornando assim os custos de investimento particularmente elevados. É verdade que poderia ser vantajoso utilizar, como material de inicio para a produção de folha-de-flandres, tiras quentes, tais como as obtidas preferencialmente, ainda que não exclusivamente, por meio de sistemas em linha do tipo de chapas finas, tal como descrito no pedido de Patente WO-A 2004/026497, em nome do presente requerente. Um diagrama de um tal sistema de enrolamento sem-fim está representado na Figura 2, onde é possível reconhecer, a jusante da zona de fundição, a fundição contínua com redução de núcleo líquido (a) um primeiro desbaste (b) directamente à saída da fundição contínua, um forno de aquecimento por indução (c), uma fresa de acabamento (e) e, após um arrefecimento rápido compacto (f) , uma bobina de enrolamento do tipo carrossel (g). com uma instalação deste tipo obtém-se, de facto a produção de tiras quentes ultra- 2 4995 finas com espessuras de 0,7 - 1 mm em vez de 2 mm, tornando assim mais simples e menos trabalhosas as fases processuais subsequentes, em particular o enrolamento a frio necessário para obter a espessura final de 0,14 - 0,18 mm, tal como é exigido pelas tiras prontas para um revestimento de superfície, de modo a tornarem-se, por exemplo, folha-de-flandres. No entanto, se forem adoptados carrinhos de enrolamento a frio do tipo High-Four de acordo com a técnica anterior, as desvantagens relacionadas com a exigência de grandes áreas e custos de investimento elevados, como foi mencionado acima, seriam apenas reduzidas, mas não ultrapassadas. 0 objectivo do presente invento consiste em proporcionar um processo com produtividade média para tiras ultra-finas adaptadas para receber um revestimento de superfície resistente à oxidação, que não tem de ser executado em instalações que se estendam ao longo de grandes áreas e envolvendo, consequentemente, custos de investimento elevados. O objectivo do presente invento é obtido com um processo de produção cujos passos estão listados na Reivindicação 1.The present invention relates to a process for manufacturing steel strips, adapted to receive a surface coating that is resistant to oxidation, using antioxidant elements such as aluminum , chromium or nickel, copper, etc., and in particular tin, for the production of tinplate. As is known, in order to deposit the aforementioned coating metals the electrolytic process or, where possible, heat treatment processes is used. Large plants of this type are known with high productivity, for which large areas and very large investments are required, providing a valid alternative for facilities with average productivity (around 200,000 tons / year), which are suitable to be combined with installations of the Mini-Mills type, and this is the technology to which the present invention is directed, rather than relevant high-throughput plants and processes of the known type, in which sheets for the production of tinplate are generally produced from hot plates having a thickness of about 2 mm and subsequently carried to the final thickness through two distinct phases of cold winding, one of which 1 4995 by means of four series-type winding mills -Four "with 4-5 trolleys, either aligned with the pickling line or off-line, as disclosed in GB-A-027495, the same type and number of trolleys. The second cold rolling step occurs after quenching with 2-3 High-Four type trolleys to bring the sheet to a final thickness of 0.14-0.18 mm prior to the tin coating. Figure 1 schematically illustrates such an installation and, as already mentioned, its main limit is that of dimension, since it extends over very large areas, thus making investment costs particularly high. It is true that it could be advantageous to use, as starting material for the production of tinplate, hot strips, such as those obtained preferably, albeit not exclusively, by in-line systems of the thin sheet type, such as described in the patent application WO-A 2004/026497, in the name of the present applicant. A diagram of such a worm winding system is shown in Figure 2, where it is possible to recognize, downstream of the casting zone, liquid die-casting continuous casting (a) a first thinning (b) directly at the outlet of the an induction heating furnace (c), a finishing mill (e) and, after a compact rapid cooling (f), a winding coil of the carousel type (g). with such an installation, in fact the production of ultra thin 2895 hot strips with thicknesses of 0.7 - 1 mm instead of 2 mm is achieved, thus making subsequent process steps simpler and less laborious the cold winding necessary to obtain the final thickness of 0.14-0.18 mm, as required by the strips ready for a surface coating, to become, for example, tinplate. However, if High-Four type cold rolling trolleys are adopted in accordance with the prior art, the disadvantages related to the requirement of large areas and high investment costs, as mentioned above, would only be reduced but not exceeded . The object of the present invention is to provide a medium productivity process for ultrafine strips adapted to receive an oxidation resistant surface coating which does not have to be carried out in installations which extend over large areas and, high investment costs. The object of the present invention is obtained with a production process whose steps are listed in Claim 1.

Os objectivos, vantagens e características adicionais do processo de acordo com o invento tornar-se-ão mais 3 4995 claros a partir da descrição detalhada seguinte com referência aos desenhos anexos, em que: A Figura 1 ilustra esquematicamente as partes de uma instalação de elevada produtividade e passos relevantes do processo para a obtenção de uma chapa de aço cuja superfície será revestida, de acordo com a técnica anterior, como foi revelado anteriormente; A Figura 2 ilustra esquematicamente uma instalação "de chapas finas" para produzir tiras quentes e material de arranque para os processos subsequentes, em particular de acordo com a Patente WO-A 2004/026497, como já foi descrita acima; e A Figura 3 ilustra esquematicamente uma instalação para executar o processo de acordo com o invento, a jusante de uma instalação de chapas finas do tipo de acordo com a figura 2.The objects, advantages and additional features of the process according to the invention will become clearer from the following detailed description with reference to the accompanying drawings, in which: Figure 1 schematically illustrates the parts of a high-pressure installation productivity and relevant steps of the process for obtaining a steel plate whose surface will be coated, according to the prior art, as previously disclosed; Figure 2 schematically illustrates a " thin sheet " to produce hot strips and starting material for the subsequent processes, in particular according to WO-A 2004/026497, as already described above; and Figure 3 schematically illustrates an installation for carrying out the process according to the invention, downstream of a thin sheet installation of the type according to figure 2.

De acordo com o presente invento, com já foi mencionado acima, as tiras usadas como um substrato para o revestimento de superfície, de preferência para produção de folha-de-flandres, são tiras quentes ultra-finas com 0,7 -1,0 mm de espessura, obtidas numa instalação de chapas finas, tal como o tipo ilustrado esquematicamente na Figura 2. 4 4995In accordance with the present invention, as already mentioned above, the strips used as a substrate for the surface coating, preferably for tinplate production, are ultra-fine hot strips with 0.7-1.0 mm thick, obtained in a thin sheet installation, such as the type shown schematically in Figure 2. 4995

Fazendo referência a Figura 3, o processo de acordo com o invento é ilustrado nas suas fases processuais a jusante da produção de tiras quentes enroladas com a espessura desejada, tal como foi indicada acima; obtidas, por exemplo, de acordo com o processo e instalação da Figura 2. Δ tira, tendo uma espessura de 0,7 - 1,0 mm, após decapagem é alimentada para uma fresa de enrolamento a frio do tipo Sendzimir 6Zhi, em particular com três carrinhos, tal como ilustrado, que é muito compacta e precisa, como consequência, de ocupar uma área mais reduzida, limitando assim os custos de investimento. Com o referido passo de enrolamento a frio, a espessura da tira é levada ao valor final pretendido, após o que a tira é sujeita a uma têmpera, quer continua, quer em lotes e laminagem ligeiramente a frio com retorno à mesma fresa de enrolamento a frio.Referring to Figure 3, the process according to the invention is illustrated in its process steps downstream of the production of hot rolled strips of the desired thickness, as indicated above; obtained, for example, according to the process and installation of Figure 2. Δ strip having a thickness of 0.7-1.0 mm after pickling is fed to a Sendzimir 6Zhi type cold winding mill in particular with three trolleys, as illustrated, which is very compact and consequently needs to occupy a smaller area, thus limiting investment costs. With said cold rolling step, the thickness of the strip is brought to the desired final value, whereupon the strip is subjected to either continuous or batch tempering and slightly cold rolling back to the same winding mill at cold.

Deverá notar-se que, ao contrário dos carrinhos do tipo High-Four, os carrinhos Sendzimir são compactos e permitem reduções mais sensíveis, uma vez que são utilizados rolos muito mais pequenos para este efeito, pelo que o contacto transversal é reduzido e a pressão específica, para o mesmo valor de força aplicada, é maior. Pelo contrário, a técnica anterior utilizava instalações (adoptando os processos correspondentes) nas quais, tal como na Figura 1, as fresas de enrolamento a quente eram proporcionadas com uma pluralidade de carrinhos do tipo em série High-Four. O motivo reside no preconceito técnico 5 4995 sugerindo que os carrinhos Sendzimir não deveriam ser utilizados uma vez que, devido a sua secção transversal reduzida de contacto, teriam realçado os defeitos geométricos da chapa, em vez de os reduzirem, tal como sob o aspecto do paralelismo. Assim, era preferível utilizar uma área de secção transversal muito maior, proporcionada pelos rolos de trabalho de grande diâmetro, que são típicos de carrinhos em série High-Four, que permitem corrigir os defeitos da chapa quente. Isto, é claro, em detrimento do peso do investimento e da área necessária para a montagem das instalações.It should be noted that, unlike High-Four type trolleys, the Sendzimir trolleys are compact and allow for more sensitive reductions, since much smaller rollers are used for this purpose, whereby the transverse contact is reduced and the pressure for the same value of applied force, is higher. Rather, the prior art used facilities (adopting the corresponding processes) in which, as in Figure 1, the hot-rolling milling cutters were provided with a plurality of High-Four series-type trolleys. The reason lies in the technical prejudice 5 4995 suggesting that the Sendzimir carts should not be used since, because of their reduced contact cross-section, they would have emphasized the geometric defects of the plate rather than reducing them, as in the aspect of parallelism. Thus, it was preferable to use a much larger cross-sectional area provided by the large diameter work rolls which are typical of High-Four series trolleys, which allow to correct the defects of the hot plate. This, of course, to the detriment of the weight of the investment and the area required for the assembly of the facilities.

Um tal preconceito técnico será totalmente eliminado quando se considera que as tiras quentes de arranque, que são utilizadas de acordo com o presente invento e produzidas em instalações de chapas finas de acordo com a Figura 2, são caracterizadas por um perfil geométrico extremamente regular, com convexidades ou vértices inferiores a 0,3% e tolerâncias de espessura comparáveis com estas, de dimensão reduzida, dos produtos enrolados a frio, tal como está ilustrado na tabela seguinte. 6 4995Such technical bias will be completely eliminated when it is considered that the hot start strips which are used in accordance with the present invention and produced in thin plate installations according to Figure 2 are characterized by an extremely regular geometric profile with convexities or vertices of less than 0.3% and thickness tolerances comparable therewith to the reduced size of the cold rolled products, as shown in the following table. 6 4995

Espessura Tolerância padrão Tolerância da tira do invento EN 10051 Enrolamentos a quente EN 10031 Enrolamentos a frio Normal Reduzido Tolerâncias para enrolamentos a quente Vértice máximo &lt;1,50 +/- 0,17 +/- 0,11 +/- 0,08 +/- 0,06 0,03 1,51 - 2,00 +/- 0,17 +/- 0,13 +/- 0,09 +/- 0,07 0,04 2,01 - 2,50 +/- 0,18 +/- 0,15 +/- 0,11 +/- 0,10 0,04 2,51 - 3,00 +/- 0,20 +/- 0,17 +/- 0,12 +/- 0,11 0,05Thickness Tolerance standard Tolerance of the strip of the invention EN 10051 Hot windings EN 10031 Cold windings Normal Reduced Tolerances for hot windings Maximum vertex <1,50 +/- 0,17 +/- 0,11 +/- 0,08 +/- 0.06 0.03 1.51 - 2.00 +/- 0.17 +/- 0.13 +/- 0.09 +/- 0.07 0.04 2.01 - 2.50 +/- 0.18 +/- 0.15 +/- 0.11 +/- 0.10 0.04 2.51 - 3.00 +/- 0.20 +/- 0.17 +/- 0 , 12 +/- 0.11 0.05

Além disso, com referência à Figura 3, nota-se que com o processo de acordo com o invento, pode ser utilizado a fresa de enrolamento Sendzímír 6Zhi com três carrinhos, a partir, mais uma vez, de uma tira enrolada a quente, tendo espessura compreendida entre 0,7 e 1,0 mm para produzir, quer directamente as tiras de folha-de-flandres do tipo SR com redução simples, após enrolamento até 0,14 - 0,18 mm, têmpera e laminagem ligeiramente a frio, ou as do tipo DR, meio cruas ou com redução dupla, de preferência, mas não exclusivamente, enrolados até uma espessura de 0,20 - 0,25 mm, sujeitos a têmpera e reduzidos posteriormente a uma espessura de ^ 0,18 mm com redução de cerca de 30%.Furthermore, with reference to Figure 3, it is noted that with the process according to the invention, the Sendzímír 6Zhi winding mill with three trolleys can be used, once again, from a hot rolled strip having thickness ranging from 0.7 to 1.0 mm to produce either the straight-cut SR-type tinplate strips after rolling up to 0.14-0.18 mm, quenching and slightly cold rolling, or DR-type, raw or double-reduced, preferably, but not exclusively, rolled to a thickness of 0.20-0.25 mm, subjected to quenching and subsequently reduced to a thickness of 0.18 mm with reduction of around 30%.

Lisboa, 5 de Julho de 2007 7Lisbon, July 5, 2007 7

Claims (4)

4995 REIVINDICAÇÕES 1. Processo para produzir tiras de aço adaptadas para receberem um revestimento de superfície resistente à oxidação, em particular estanhagem, caracterizado por compreender, com início em tiras quentes decapadas com uma espessura de ^0,7 mm, um passo único de enrolamento a frio passando através de não mais de três carrinhos do tipo Sendzimir 6Zhi para uma redução a frio da espessura para menos de 0,25 mm, e uma fase de têmpera subsequente.A method for producing steel strips adapted to receive an oxidation resistant surface coating, in particular tinning, characterized in that it comprises, starting from pickled hot strips having a thickness of> 0.7 mm, a single rolling step by passing through no more than three Sendzimir 6Zhi type carts for a cold reduction of the thickness to less than 0.25 mm, and a subsequent quenching step. 2. Processo de acordo com a reivindicação 1, caracterizado pelo facto de, para produzir tiras de redução simples (SR), o enrolamento a frio do tipo Sendzimir 6Zhi é executado até que seja atingida uma espessura ^ 0,18 mm e que o dito passo de têmpera seja seguido apenas por passos de laminagem ligeiramente a frio e acabamento.A process according to claim 1, characterized in that to produce simple reduction strips (SR), Sendzimir type 6Zhi cold winding is performed until a thickness of 0.18 mm is reached and said annealing step is followed only by slightly cold rolling steps and finishing. 3. Processo de acordo com a reivindicação 1, caracterizado pelo facto de, para produzir chapas meio cruas do tipo redução dupla (DR) , o dito passo de enrolamento a frio do tipo Sendzimir 6Zhi seja executado inicialmente até se atingir a espessura compreendida entre 0,20 mm e 0,25 mm e, com a têmpera, através de reduções de cerca de 30%, para valores de espessura inferiores a 0,18 mm. 8 4995A method according to claim 1, characterized in that, in order to produce double-type (DR) double-blank type sheets, said Sendzimir type 6Zhi type cold-rolling step is initially executed until a thickness of between 0 , 20 mm and 0.25 mm and, with quenching, by reductions of about 30%, for thickness values of less than 0.18 mm. 8 4995 4. Processo de acordo com qualquer uma das reivindicações precedentes, caracterizado por a tira quente de arranque ser obtida através de uma instalação de chapas finas. Lisboa, 5 de Julho de 2007 9A process according to any one of the preceding claims, characterized in that the hot strip of starter is obtained through a thin sheet installation. Lisbon, July 5, 2007 9
PT04425880T 2004-11-24 2004-11-24 Process of producing steel strips suitable for an oxidation-resisting surface coating PT1662013E (en)

Applications Claiming Priority (1)

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EP04425880A EP1662013B1 (en) 2004-11-24 2004-11-24 Process of producing steel strips suitable for an oxidation-resisting surface coating

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Publication Number Publication Date
PT1662013E true PT1662013E (en) 2007-07-17

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EP (1) EP1662013B1 (en)
AT (1) ATE359378T1 (en)
DE (1) DE602004005875T2 (en)
DK (1) DK1662013T3 (en)
ES (1) ES2285400T3 (en)
HR (1) HRP20070274T3 (en)
PL (1) PL1662013T3 (en)
PT (1) PT1662013E (en)
SI (1) SI1662013T1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2006336815A1 (en) * 2006-01-26 2007-08-02 Giovanni Arvedi Process of producing steel strips suitable for an oxidation-resisting surface coating
CN111957750B (en) * 2020-07-08 2022-03-04 北京科技大学设计研究院有限公司 Method for optimizing thickness of inlet of rolling mill by using quality analysis tool

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1027495A (en) * 1962-05-03 1966-04-27 Davy & United Eng Co Ltd Production of tinplate
JPS5858232A (en) * 1981-09-30 1983-04-06 Sumitomo Metal Ind Ltd Production of alloyed zinc plated steel plate having thermal hardenability
JPS58110104A (en) * 1981-12-23 1983-06-30 Kawasaki Steel Corp Method for preventing chatter in cold rolling of stainless steel strip

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DE602004005875D1 (en) 2007-05-24
HRP20070274T3 (en) 2007-07-31
ATE359378T1 (en) 2007-05-15
DE602004005875T2 (en) 2008-01-17
PL1662013T3 (en) 2007-09-28
EP1662013A1 (en) 2006-05-31
SI1662013T1 (en) 2007-10-31
ES2285400T3 (en) 2007-11-16
EP1662013B1 (en) 2007-04-11
DK1662013T3 (en) 2007-08-27

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