WO2009094857A1 - Procédé de laminage à champ de température inverse pour une feuille d'alliage de mg - Google Patents

Procédé de laminage à champ de température inverse pour une feuille d'alliage de mg Download PDF

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Publication number
WO2009094857A1
WO2009094857A1 PCT/CN2008/070172 CN2008070172W WO2009094857A1 WO 2009094857 A1 WO2009094857 A1 WO 2009094857A1 CN 2008070172 W CN2008070172 W CN 2008070172W WO 2009094857 A1 WO2009094857 A1 WO 2009094857A1
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WO
WIPO (PCT)
Prior art keywords
rolling
temperature
temperature field
sheet
magnesium alloy
Prior art date
Application number
PCT/CN2008/070172
Other languages
English (en)
Chinese (zh)
Inventor
Erde Wang
Deshan Yang
Zuyan Lu
Yang Yu
Original Assignee
Haerbin Institute Of Technology
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 Haerbin Institute Of Technology filed Critical Haerbin Institute Of Technology
Priority to JP2010543356A priority Critical patent/JP2011509833A/ja
Priority to PCT/CN2008/070172 priority patent/WO2009094857A1/fr
Priority to US12/665,323 priority patent/US20100180656A1/en
Publication of WO2009094857A1 publication Critical patent/WO2009094857A1/fr

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Classifications

    • 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
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • 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
    • B21B27/06—Lubricating, cooling or heating rolls

Definitions

  • the present invention relates to a method of rolling a magnesium and magnesium alloy sheet in a state in which a rolled slab is subjected to a reverse temperature field.
  • Ren 1 can be used as a metal material, and the market for casting technology only accounts for 10 ⁇ 15%.
  • the secondary plastic processing technology mainly includes:
  • Extrusion technology Extrusion of bars, tubes, profiles.
  • Rolling technology Rolling of sheets, wires, bars, profiles.
  • the rolled magnesium alloy sheet (0.3 ⁇ 2 mm thick) has a high yield, only 30 ⁇ 40 %.
  • magnesium alloy sheet rolling technology is a key technology that hinders the development of the magnesium and magnesium alloy industries.
  • the crystal structure of magnesium is hexagonal, and the plasticity difference at room temperature is 'congenitally insufficient'. Efforts to change the plasticity by changing the crystal structure are impossible, because changing the hexagonal crystal structure is not magnesium or magnesium alloy! Increasing the purity of magnesium and magnesium alloys may not only improve corrosion resistance but also improve plasticity. The cost is too expensive and not desirable for production. The world is now focusing on refining magnesium alloy grains, as refining grains can significantly improve the plasticity of magnesium and magnesium alloys. This will facilitate the secondary plastic working of the magnesium alloy.
  • the new process methods for refining magnesium alloy grains at home and abroad mainly include:
  • the method although the grain size of the magnesium alloy can be refined to submicron, although these methods can greatly improve the plasticity, the production efficiency is high, the cost is high, and it is not suitable for production, and is not suitable for the production of plates.
  • the rolls of the heating mill are rolled under a reverse temperature field which matches the temperature of the rolls to the initial temperature field of the sheet being rolled.
  • the method for manufacturing a reverse temperature field rolling process of a high plasticity magnesium alloy sheet wherein the reverse temperature field refers to an initial temperature field at which the slab is started to be rolled, and the rolled sheet is rolled and rolled.
  • the surface temperature of the billet is higher than the core temperature of the slab, and heat is transferred from the outside to the inside during the rolling deformation.
  • the rolling amount per pass is allowed to be in the range of 20% - 70% of the relative rolling amount, and the rolling speed is 5-1 0 m / min.
  • the method for manufacturing a reverse temperature field rolling process of a high plasticity magnesium alloy sheet, in the rolling process can also be selected to be 450 ° c or 400 ° c or 300 ° c and the core temperature is 20 ° c.
  • 3-6 times is 30-40%, the first 10-10 times is 40-50%, and the 10th time is 50-70%.
  • the amount of rolling per pass is selected within the range of 30-60% of the relative deformation amount depending on the thickness of the final sheet.
  • the finishing temperature is generally around 300 ⁇ , and the rolling amount per pass is about 20%.
  • the total number of rolling passes required is 26 ⁇ 28 times, and the finished product rate is 30 ⁇ 40%.
  • the rolling technology of the magnesium and magnesium alloy sheets of the present invention is different from the existing domestic and international rolling techniques, and the reverse temperature field rolling process is employed. Generally from 120mm thick to lmm
  • the billet only needs to be heated once and the starting temperature is 420. c, the amount of rolling per pass can be increased to 30-60%, the total number of rolling passes required is 13 ⁇ 14 times, and the number of heating times is reduced by 2 ⁇ 4
  • the total number of passes is about 1/2 of the general hot rolling technology.
  • the material can be increased to 60 ⁇ 70%
  • the rolled magnesium alloy sheet of the invention has fine and uniform crystal grains, and can stably control the grain size of the sheet below 10 um, and the general state can be refined to 2-6 um.
  • the range can greatly improve the plasticity of the sheet, so that the elongation of the sheet can be stabilized by 21% or more in both horizontal and vertical directions, most of which can reach 25-28%, and even reach 34%.
  • the longitudinal and lateral performance of the sheet is poor, and the lj is small, and can be controlled in the range of 10 ⁇ 15%.
  • the invention not only solves the manufacturing cost problem of the magnesium alloy sheet, but also achieves or approaches the manufacturing cost of the aluminum alloy sheet, and solves the problem of poor plasticity of the sheet, so that the plasticity index of the sheet reaches the rust-proof aluminum alloy water. Flat, close to the plasticity level of the carbon steel sheet.
  • the invention fundamentally solves the problem of plastic processing technology of magnesium and magnesium alloys.
  • the present invention will completely change the conventional concept that the magnesium alloy is poor in plasticity and difficult in plastic working, and breaks through the forbidden zone where the magnesium alloy cannot be cold plastic worked at room temperature. It has been said that it is a major innovation in the plastic processing technology of magnesium and magnesium alloys, which has opened up a new technical approach for the popularization of magnesium and magnesium alloys.
  • the reverse temperature field rolling of the invention refers to controlling the surface temperature of the rolled sheet material to be higher than the core temperature of the slab, and the formed temperature field is called reverse temperature field rolling, and the temperature of all the rolling processes in general.
  • the temperature gradient of the field is just the opposite.
  • all the rolling, whether it is hot rolling or cold rolling at room temperature the core temperature of the slab is higher than the surface temperature, and the heat is radiated from the slab to the outside and the roll, that is, Forming a forward temperature field in which the core temperature of the sheet is higher than the surface temperature of the sheet.
  • the invention starts from changing the plasticity of plastic processing of magnesium and magnesium alloys, and solves the problem that all conventional plastic processing methods are not suitable for plastic processing of magnesium and magnesium alloys, because all plastic processing processes are forward temperature fields, so-called forward
  • the temperature field means that the internal temperature of all plastically deformed bodies is higher than the surface temperature, because during the deformation process, the heat generated by the plastic deformation is radiated to the direction of the tool, thus forming the deformation body temperature higher than the deformation surface.
  • the temperature gradient of temperature is defined as a forward temperature field in the present invention.
  • the present invention is exactly opposite to the forward temperature field, forming a temperature gradient above the core in the deformed body, and thus is positive with the conventional plastic working process.
  • the temperature field is just the opposite, so it is defined in the present invention as 'plastic processing of the reverse temperature field'.
  • Reverse temperature field rolling process is a reverse temperature field plastic processing method in reverse temperature field plastic processing
  • the new process of plastic working in reverse temperature is proposed from the principle of the traditional plastic working forward temperature field.
  • the reverse temperature field is a competition against the traditional forward temperature field.
  • the plastic processing process applicable to all metal materials has a multiplicity of meanings from the theory of technology. Therefore, the rolling process method of the reverse temperature field of the magnesium and magnesium alloy of the invention has a solid theoretical basis of the process.
  • this method is aimed at the plastic processing of magnesium and magnesium alloys. Since the rolling of magnesium and magnesium alloy sheets is the most difficult, in order to completely solve this problem, the patent of the present invention is directed to the rolling process of magnesium and magnesium alloy sheets. .
  • the reverse temperature field refers to the initial temperature field at which the slab is started to be rolled, that is, the surface temperature of the billet which is rolled by the rolled sheet is higher than the core temperature of the slab, and the rolling deformation process The heat is transferred from the outside to the inside.
  • the key process parameters in the present invention are the control of the initial reverse twist field of the slab and the control of the pass rolling amount.
  • the control of the reverse temperature field refers to the temperature difference between the surface of the billet and the core, that is, the temperature gradient.
  • the heat generated by the plastic deformation can make the surface of the sheet and the core temperature tend to coincide. Therefore, the temperature field is changed.
  • the temperature gradient disappears.
  • the temperature uniformity it is necessary to have a certain time to reach the temperature uniformity.
  • the temperature gradient of the initial reverse temperature field of the crucible can be adjusted according to the thickness of the plate, the amount of pass rolling and the composition of the alloy.
  • the selection of the pass rolling amount can be determined according to the composition of the ingot alloy and the microstructure of the ingot. Generally, the amount of rolling in the initial rolling can be smaller. As the rolling pass increases, it can be gradually increased. The amount of pass rolling can generally be 20 ⁇ 70%.
  • the surface temperature of the slab is 450-250 ° c
  • the core temperature is 20-150 ° c
  • the amount of rolling per pass is allowed to be 20% of the relative rolling amount-- Within 70%
  • the ritual speed is 5-10 m/min.
  • the slab surface temperature was 450 ° C and the core temperature was 100 ° c.
  • the ingots in which the raw billet is a cast structure are subjected to multi-pass rolling, and the 1-2 passes are relatively
  • the amount of deformation is 20-30%
  • the third to third is 30-40%
  • the sixth to tenth is 40-50%
  • the tenth or more is 50-70%.
  • the raw material billet is an ingot of a cast structure, and the amount of the first 1-2 passes is 20-30% of the relative deformation amount, and the 3-5th time is 30-40%
  • the amount of rolling per pass is 30-60% of the relative deformation amount depending on the thickness of the final sheet.
  • the ingot width can be determined according to the length of the rolling mill roll. In this embodiment, the ingot width is selected.
  • the length of the ingot is 600mm.
  • the alloy is AZ31 magnesium alloy (components according to US standards).
  • Raw material ingot heating heating the ingot surface to control the rolling start, the surface and the core temperature ladder are
  • Lubricants ⁇ Spray the surface of the rolls and slabs with silicone oil or vegetable oil.
  • the rolling capacity per pass is controlled by the relative deformation amount of 30 ⁇ 60%, rolling from 100mm thick ingot to 1mm.
  • Thick a total of 13 to 14 passes.
  • Yield strength 156Mpa, tensile strength 261Mpa, elongation 26%.
  • Ingot size 20mm thick * 400mm (width) * 400mm (long).
  • Ingot billet heating The surface of the ingot is heated to control the rolling and the surface temperature gradient between the surface and the core is 450 c - 100 c.
  • the first pass is 20%;
  • Embodiment 6 and Embodiment 7 of the present invention are the control of the initial reverse temperature field of the slab and the control of the pass reduction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

Selon le procédé de laminage à champ de température inverse pour une feuille d'alliage de Mg de la présente invention, les rouleaux sont chauffés de sorte que le champ de température inverse sur la feuille soit formé, et la température des rouleaux correspond à la température initiale de la feuille. La feuille est laminée avec le champ de température inverse qui indique que la température de surface initiale de la feuille laminée est supérieure à la température du cœur. Lors du laminage, l'énergie thermique est transférée de la surface au cœur. Ledit procédé permet de réduire les coûts et d'améliorer l'efficacité.
PCT/CN2008/070172 2008-01-23 2008-01-23 Procédé de laminage à champ de température inverse pour une feuille d'alliage de mg WO2009094857A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2010543356A JP2011509833A (ja) 2008-01-23 2008-01-23 可塑性の高いマグネシウム合金板材の逆方向温度場を作るための圧延プロセス方法
PCT/CN2008/070172 WO2009094857A1 (fr) 2008-01-23 2008-01-23 Procédé de laminage à champ de température inverse pour une feuille d'alliage de mg
US12/665,323 US20100180656A1 (en) 2008-01-23 2008-01-23 Reverse temperature field rolling method for mg alloy sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2008/070172 WO2009094857A1 (fr) 2008-01-23 2008-01-23 Procédé de laminage à champ de température inverse pour une feuille d'alliage de mg

Publications (1)

Publication Number Publication Date
WO2009094857A1 true WO2009094857A1 (fr) 2009-08-06

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PCT/CN2008/070172 WO2009094857A1 (fr) 2008-01-23 2008-01-23 Procédé de laminage à champ de température inverse pour une feuille d'alliage de mg

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US (1) US20100180656A1 (fr)
JP (1) JP2011509833A (fr)
WO (1) WO2009094857A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106862272A (zh) * 2015-12-14 2017-06-20 宝山钢铁股份有限公司 一种高强度高延展性镁合金板材的高效率轧制工艺及制备方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5264140B2 (ja) * 2007-10-16 2013-08-14 Ｉｈｉメタルテック株式会社 マグネシウム合金熱間圧延装置
CN102189119B (zh) * 2011-04-13 2013-02-27 南京钢铁股份有限公司 单机架炉卷轧机热轧平轧高钢级管线钢板形控制工艺
US9216445B2 (en) * 2011-08-03 2015-12-22 Ut-Battelle, Llc Method of forming magnesium alloy sheets
CN107030112A (zh) * 2017-03-07 2017-08-11 重庆市科学技术研究院 一种镁合金超薄板的轧制方法

Citations (3)

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Publication number Priority date Publication date Assignee Title
EP0198153B1 (fr) * 1985-02-08 1991-04-10 Asea Brown Boveri Aktiengesellschaft Procédé pour chauffer des billettes et des lingots
CN1275710C (zh) * 2002-06-05 2006-09-20 住友电工钢铁电缆株式会社 镁合金板及其制造方法
CN1310711C (zh) * 2005-04-19 2007-04-18 哈尔滨工业大学 一种制造微晶镁合金反向温度场挤压方法

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US2029728A (en) * 1934-02-12 1936-02-04 Dow Chemical Co Rolling magnesium alloys
US2060071A (en) * 1934-05-21 1936-11-10 Dow Chemical Co Rolling magnesium alloy
AU2003900971A0 (en) * 2003-02-28 2003-03-13 Commonwealth Scientific And Industrial Research Organisation Magnesium alloy sheet and its production
JP4306547B2 (ja) * 2004-06-30 2009-08-05 住友電気工業株式会社 マグネシウム合金板及びその製造方法
JP4692882B2 (ja) * 2005-08-11 2011-06-01 住友金属工業株式会社 マグネシウム板とマグネシウム板の製造方法

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
EP0198153B1 (fr) * 1985-02-08 1991-04-10 Asea Brown Boveri Aktiengesellschaft Procédé pour chauffer des billettes et des lingots
CN1275710C (zh) * 2002-06-05 2006-09-20 住友电工钢铁电缆株式会社 镁合金板及其制造方法
CN1310711C (zh) * 2005-04-19 2007-04-18 哈尔滨工业大学 一种制造微晶镁合金反向温度场挤压方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106862272A (zh) * 2015-12-14 2017-06-20 宝山钢铁股份有限公司 一种高强度高延展性镁合金板材的高效率轧制工艺及制备方法

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US20100180656A1 (en) 2010-07-22
JP2011509833A (ja) 2011-03-31

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