EP3187616A1 - Méthode de fabrication de bandes et feuilles d'alliages zn-cu-ti pour le secteur de la construction - Google Patents

Méthode de fabrication de bandes et feuilles d'alliages zn-cu-ti pour le secteur de la construction Download PDF

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Publication number
EP3187616A1
EP3187616A1 EP15460143.9A EP15460143A EP3187616A1 EP 3187616 A1 EP3187616 A1 EP 3187616A1 EP 15460143 A EP15460143 A EP 15460143A EP 3187616 A1 EP3187616 A1 EP 3187616A1
Authority
EP
European Patent Office
Prior art keywords
rolling
finished product
rolling process
roll
metal strip
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP15460143.9A
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German (de)
English (en)
Inventor
Tomasz Napiora
Stanislaw Pawlicha
Tadeusz Knych
Andrzej Mamala
Piotr Osuch
Monika Walkowicz
Lukasz Gradkiewicz
Radoslaw Sokol
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zm Silesia SA
Original Assignee
Zm Silesia SA
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
Publication date
Application filed by Zm Silesia SA filed Critical Zm Silesia SA
Priority to EP15460143.9A priority Critical patent/EP3187616A1/fr
Publication of EP3187616A1 publication Critical patent/EP3187616A1/fr
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/165—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon of zinc or cadmium or alloys based thereon

Definitions

  • the flat-rolled products made of Zn-C-Ti alloys intended for use in building engineering are manufactured in accordance with the EN-988 standard.
  • Multiple manufacturing methods are known, which enable fabrication of sheets made of Zn-Cu-Ti alloys having the desired usable properties, such as mechanical properties, creep resistance and susceptibility to plastic strain of the finished product during installation, also in ambient temperatures as low as +10°C, since the metallic materials made of zinc alloys are known to be susceptible to brittle cracking in low, positive temperatures.
  • the properties of finished sheets are shaped in industrial manufacturing processes of metal plates mainly in the rolling operation of the mill feedstock in form of cast strip obtained most often as a result of the continuous casting process.
  • the patent specification Number GB1191994A discloses a sheet metal manufacture method, wherein the usable properties of Zn-Cu-Ti alloy sheets with the content of the main alloying components in form of Cu (from 0,05 to 2 wt.%), Ti (0,005 wt. % to 0,4 wt.
  • tramp elements such as: Ag, Cd, Fe, In, Pb, Sn are being shaped in the course of rolling process, wherein a temperature of the mill feedstock ranging from 230 °C to 270 °C and the reduction ratio in the first roll pass amounting to 80 % - 95 % have been indicated as ones of the critical technological parameters, being a requisite of the desired usable properties of the finished product with given chemical composition.
  • the U.S. patent specification Number 4051887 discloses a production method of Zn-Cu-Ti alloy sheets with the content of main alloying components in form of Cu (from 1,5 wt. % to 5,5 wt. %), Ti (0,05 wt. % to 0,25 wt. %) and the remainder being Zn, wherein the strip casting process accomplished in continuous way is integrated with the rolling process in such a manner that crystallized strip with a width from 500 mm to 1500 mm and thickness from 6 mm to 24 mm and temperature amounting to 360 °C leaving the casting machine undergoes directly the rolling operation in five roll stands positioned one after the other. Each roll stand reduces the thickness of the metal strip by 50 %, at temperature of plastic deformation amounting to 270 °C before the first roll pass which ensures the desired usable properties of the finished product.
  • polish patent specification Number PL195433 discloses a production technique of Zn-Cu-Ti alloy sheets designed for use in building engineering though a process consisting of casting operation of Zn-Cu-Tl alloy strip with chemical composition in compliance with EN-988 standard according to the Twin Roll Casting (TRC) method and dis-integrated rolling process being characterized by reheating the strip before rolling operation up to the temperature of 190 °C and following rolling during 11 roll passes with a predetermined value of individual reduction ratios, as shown schematically in FIG. 1 .
  • TRC Twin Roll Casting
  • a similar production technique of Zn-Cu-Ti alloy sheets (cf. FIG. 2 ) is also known from the Polish patent specification Number PL195253 , which differs from the above mentioned method in the number of roll passes reduced to 9 and supplementary heat treatment of the finished product, i.e. sheet metal after rolling process, aiming at recrystallization annealing assumed to improve the usable properties of sheets, and in particular to enable repeated bending and bending out without cracks or fractures, which is not the case in the method coming from patent specification Number PL PL195433
  • the flat-rolled products made of Zn-Cu-Ti alloys with chemical composition in accordance with the EN-988 standard are manufactured in non-integrated rolling process from the strip cast in a continuous manner according to the Twin Roll Casting (TRC) technique.
  • TRC Twin Roll Casting
  • the significance of this invention consists in the fact, that first the geometric parameters of the strip cast in TRC process are chosen, and in particular its thickness, which should be comprised in the range from 4 mm to 16 mm. This requirement is conditioned by achievement of the desired usable properties, distribution of the reduction ratios in the succeeding operation - the rolling process. The width of both cast strip and finished product should be included within the range from 500 mm to 2000 mm. Then, the reheating temperature of cast strip before beginning of the rolling process is being chosen. The heating up operation in hitherto known fabrication methods aims mainly at decreasing of the deformation resistance of the casting during the rolling process.
  • the reheating temperature before rolling plays an essential part in the metallurgical processes shaping the usable properties of the finished sheet through the recrystallization process.
  • the reheating temperature of the cast strip lies in the range from 240°C to 270°C.
  • the first roll pass of the rolling process has the reduction ratio less than 40 % in consideration of the fact that the strip having a considerable thickness before the first roll pass gives up the heat relatively more slowly.
  • the key factor in the manufacturing process of Zn-Cu-Ti alloy sheets is also a precise choice of its chemical composition.
  • the alloy being the subject of present description contains from 0,08 wt. % to 0,24 wt. % Cu, from 0,06 wt. % to 0,12 wt. % Ti, not more than 0,015 wt. % Al and rest Zn and tramp elements such as Cd, Fe, Pb, Sn.
  • FIG. 3 An exemplary application of the proposed production method of Zn-Cu-Ti alloy sheets is shown schematically in FIG. 3 .
  • Al and rest tramp elements such as Cd, Fe, Pb, Sn and rest Zn is cast in continuous manner according to the Twin Roll Casting (TRC) technique in form of strip with thickness of 8 mm and width of 1100 mm, which is wound in coils weighing 6 tons.
  • the coil has a temperature amounting to 100 °C and is cooling down freely to the ambient temperature.
  • the metal strip is guided to the soaking-pit in order to heat it up to the rolling temperature, which amounts to 250 °C.
  • the coil is conducted to the rolling process, which is accomplished by means of roll stand in four-high reversing system.
  • the rolling process of metal strip with input thickness is carried out until the thickness of 0,65 mm is obtained, in 5 roll passes with reduction ratios amounting to ⁇ 40%.
  • the rolling rate in first roll pass amounts to 120 m/min, whereas in the last four passes 160 m/min.
  • the coil of strip has a temperature of about 120°C and cools down in ambient temperature.

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
EP15460143.9A 2015-12-31 2015-12-31 Méthode de fabrication de bandes et feuilles d'alliages zn-cu-ti pour le secteur de la construction Withdrawn EP3187616A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15460143.9A EP3187616A1 (fr) 2015-12-31 2015-12-31 Méthode de fabrication de bandes et feuilles d'alliages zn-cu-ti pour le secteur de la construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15460143.9A EP3187616A1 (fr) 2015-12-31 2015-12-31 Méthode de fabrication de bandes et feuilles d'alliages zn-cu-ti pour le secteur de la construction

Publications (1)

Publication Number Publication Date
EP3187616A1 true EP3187616A1 (fr) 2017-07-05

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EP15460143.9A Withdrawn EP3187616A1 (fr) 2015-12-31 2015-12-31 Méthode de fabrication de bandes et feuilles d'alliages zn-cu-ti pour le secteur de la construction

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EP (1) EP3187616A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113699398A (zh) * 2021-08-24 2021-11-26 湘潭大学 一种高强高韧耐蚀变形ZnCuTi板材短流程的制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1191994A (en) 1967-12-15 1970-05-13 Centre Nat Rech Metall Improvements in or relating to the Rolling of Zinc Based Alloys
US4051887A (en) 1975-03-13 1977-10-04 Rheinisches Zinkwalzwerk Gmbh & Co. Kg Process for producing sheets and strip of zinc-copper-titanium alloy
PL195433A1 (pl) 1977-01-20 1978-07-31 Regionalny Zwiazek Spoldzielni Poduszka ratunkowa
PL195253B1 (pl) 2001-08-21 2007-08-31 Zaklady Metalurgiczne Silesia Sposób wytwarzania taśm oraz blach ze stopu cynku z miedzią i tytanem oraz układ urządzeń do wytwarzania taśm oraz blach ze stopu cynku

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1191994A (en) 1967-12-15 1970-05-13 Centre Nat Rech Metall Improvements in or relating to the Rolling of Zinc Based Alloys
US4051887A (en) 1975-03-13 1977-10-04 Rheinisches Zinkwalzwerk Gmbh & Co. Kg Process for producing sheets and strip of zinc-copper-titanium alloy
PL195433A1 (pl) 1977-01-20 1978-07-31 Regionalny Zwiazek Spoldzielni Poduszka ratunkowa
PL195253B1 (pl) 2001-08-21 2007-08-31 Zaklady Metalurgiczne Silesia Sposób wytwarzania taśm oraz blach ze stopu cynku z miedzią i tytanem oraz układ urządzeń do wytwarzania taśm oraz blach ze stopu cynku

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
G. BOCZKAL ET AL: "The brittleness of Zn-Cu-Ti Sheet Alloys", ARCHIVES OF METALLURGY AND MATERIALS, vol. 60, no. 3, 12 September 2015 (2015-09-12), XP055302946, DOI: 10.1515/amm-2015-0384 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113699398A (zh) * 2021-08-24 2021-11-26 湘潭大学 一种高强高韧耐蚀变形ZnCuTi板材短流程的制备方法
CN113699398B (zh) * 2021-08-24 2022-04-22 湘潭大学 一种高强高韧耐蚀变形ZnCuTi板材短流程的制备方法

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