EP2395119A1 - Procédé de déformation d'un alliage à base de magnésium à l'aide d'extrudeuses - Google Patents

Procédé de déformation d'un alliage à base de magnésium à l'aide d'extrudeuses Download PDF

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Publication number
EP2395119A1
EP2395119A1 EP10163645A EP10163645A EP2395119A1 EP 2395119 A1 EP2395119 A1 EP 2395119A1 EP 10163645 A EP10163645 A EP 10163645A EP 10163645 A EP10163645 A EP 10163645A EP 2395119 A1 EP2395119 A1 EP 2395119A1
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EP
European Patent Office
Prior art keywords
extrusion
magnesium
based alloy
profiles
alloy
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Withdrawn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
EP10163645A
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German (de)
English (en)
Inventor
Jan Bohlen
Dietmar Letzig
Karl Ulrich Kainer
Jacek Swiostek
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.)
Helmholtz Zentrum Geesthacht Zentrum fuer Material und Kustenforschung GmbH
Original Assignee
Helmholtz Zentrum Geesthacht Zentrum fuer Material und Kustenforschung GmbH
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 Helmholtz Zentrum Geesthacht Zentrum fuer Material und Kustenforschung GmbH filed Critical Helmholtz Zentrum Geesthacht Zentrum fuer Material und Kustenforschung GmbH
Priority to EP10163645A priority Critical patent/EP2395119A1/fr
Publication of EP2395119A1 publication Critical patent/EP2395119A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C23/00—Alloys based on magnesium
    • C22C23/04—Alloys based on magnesium with zinc or cadmium as the next major constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C23/00—Alloys based on magnesium
    • C22C23/06—Alloys based on magnesium with a rare earth metal as the next major constituent

Definitions

  • the present invention relates to a process for the production of profiles from a magnesium-based alloy by extrusion.
  • Extrusion is a massive forming process for the production of bars, wires, tubes and other profiles.
  • a heated to forming temperature compact (block) is pressed with a punch through a die.
  • the outer shape of the billet is determined by the die and may include, in addition to bars, wires and tubes, L-shaped profiles, T-shaped profiles, I-shaped profiles and the like.
  • extrusion is used primarily on aluminum and aluminum alloys (eg heat sink profiles), copper and copper alloys (overhead lines), and increasingly on steel, magnesium and titanium alloys.
  • direct, indirect and hydrostatic extrusion are to be distinguished.
  • direct extrusion the punch pushes the block along the inner surface of the recipient towards the die. To generate this relative movement between the block and the recipient, high frictional forces must be overcome. The directions of movement of punch and exiting strand are the same.
  • indirect extrusion the recipient is closed on one side, from the other side, the die is pressed onto the block, which is located at the head of a hollow punch. The strand passes through the punch bore. Their diameter thus limits the profile outline.
  • a reduction of the overheating is conventionally achieved by lowering the extrusion temperature and / or the extrusion speed.
  • this is only possible to a limited extent in particular for higher-alloyed and higher-strength magnesium alloys.
  • the object of the present invention is to provide a process for the production of profiles from a magnesium-based alloy by extrusion, which can be carried out with a high extrusion speed on conventional extrusion presses, the formation of hot cracks being largely avoided.
  • the alloys used according to the invention can be extruded at significantly higher pressing speeds using conventional extrusion presses without the formation of hot cracks on the profile surface.
  • the efficiency of existing processes for the production of profiles from a magnesium-based alloy by extrusion is thus greatly improved.
  • the magnesium alloys used in the invention are for example from EP 0 791 662 B1 or the US 6,299,834 B1 known. However, it has not been known to use these alloys in an extrusion process for the production of profiles.
  • the extrusion process of the invention is a direct or an indirect extrusion process.
  • the content of zinc is preferably 4 to 6% by weight, and the content of rare earth elements is preferably 1 to 3.5% by weight, more preferably 2 to 3.5% by weight.
  • Preferred mode end elements are cerium, lanthanum, neodymium, praseodymium and combinations thereof (mischmetal).
  • the extrusion speed depends on the desired profile. Extrusion speeds of at least 3 m / min, more preferably at least 5 m / min, are advantageous for the economy.
  • the process is preferably carried out at an extrusion temperature of 200 ° C to 500 ° C, preferably 250 ° C to 400 ° C, more preferably 250 ° C to 350 ° C.
  • the extrusion temperature is the temperature of the pin during extrusion.
  • the exit temperature of the profile should preferably be 200 ° C to 600 ° C, more preferably 350 ° C to 450 ° C.
  • Both alloys were produced under the same conditions in an indirect extrusion process at a pressing speed of 3 m / min, a pressing temperature of 300 ° C (outlet temperature 400 ° C), a pressing ratio of 25 and with a profile diameter of 32 mm extruded.
  • Alloy 1 The conventional ZK60 alloy (Alloy 1) showed hot cracks ( Fig. 1 ) and was unusable for further use. Alloy 2 showed a crack-free surface ( Fig. 2 ) and had a finer and more homogeneous microstructure inside than Alloy 1.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Extrusion Of Metal (AREA)
  • Forging (AREA)
EP10163645A 2010-05-21 2010-05-21 Procédé de déformation d'un alliage à base de magnésium à l'aide d'extrudeuses Withdrawn EP2395119A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10163645A EP2395119A1 (fr) 2010-05-21 2010-05-21 Procédé de déformation d'un alliage à base de magnésium à l'aide d'extrudeuses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10163645A EP2395119A1 (fr) 2010-05-21 2010-05-21 Procédé de déformation d'un alliage à base de magnésium à l'aide d'extrudeuses

Publications (1)

Publication Number Publication Date
EP2395119A1 true EP2395119A1 (fr) 2011-12-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10163645A Withdrawn EP2395119A1 (fr) 2010-05-21 2010-05-21 Procédé de déformation d'un alliage à base de magnésium à l'aide d'extrudeuses

Country Status (1)

Country Link
EP (1) EP2395119A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102839307A (zh) * 2012-09-28 2012-12-26 重庆大学 一种含稀土铈的高强度高电磁屏蔽性能变形镁合金
CN104099507A (zh) * 2014-07-14 2014-10-15 沈阳工业大学 高强度、高韧性稀土镁合金
CN105483484A (zh) * 2016-02-04 2016-04-13 哈尔滨工业大学（威海） 制造各向同性高强度变形镁合金的方法
CN110541100A (zh) * 2019-09-30 2019-12-06 内蒙古民族大学 一种超高综合性能变形稀土镁合金材料及其制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0791662B1 (fr) 1996-02-27 2001-05-16 Honda Giken Kogyo Kabushiki Kaisha Alliage de magnésium résistant à la chaleur
US6299834B1 (en) 1999-06-17 2001-10-09 Kabushiki Kaisha Toyota Chuo Kenkyusho Heat-resistant magnesium alloy
EP1574590A1 (fr) * 2004-03-11 2005-09-14 Gkss-Forschungszentrum Geesthacht Gmbh Méthode de fabrication des profiles en métal léger par extrusion

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0791662B1 (fr) 1996-02-27 2001-05-16 Honda Giken Kogyo Kabushiki Kaisha Alliage de magnésium résistant à la chaleur
US6299834B1 (en) 1999-06-17 2001-10-09 Kabushiki Kaisha Toyota Chuo Kenkyusho Heat-resistant magnesium alloy
EP1574590A1 (fr) * 2004-03-11 2005-09-14 Gkss-Forschungszentrum Geesthacht Gmbh Méthode de fabrication des profiles en métal léger par extrusion

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
H.E. FRIEDRICH, B.L. MORDIKE: "Magnesium Technology", 2006, SPRINGER VERLAG, Heidelberg, ISBN: 3-540-20599-3, XP002593468 *
LI LIN, ZHENG LIU, LIJIA CHEN, FENG LI: "Tensile Properties and Strengthening Mechanisms of Mg-Zn-Zr Alloys", METALS AND MATERIALS INTERNATIONAL, vol. 10, no. 6, 2004, pages 507 - 512, XP002593466 *
S.M. HE, L.M. PENG, X.Q. ZENG, W.J. DING, Y.P. ZHU: "Comparison of the microstructure and mechanical properties of a ZK60 alloy with and without 1.3 wt.% gadolinium addition", MATERIALS SCIENCE AND ENGINEERING, no. A433, 2006, pages 175 - 181, XP002593467 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102839307A (zh) * 2012-09-28 2012-12-26 重庆大学 一种含稀土铈的高强度高电磁屏蔽性能变形镁合金
CN104099507A (zh) * 2014-07-14 2014-10-15 沈阳工业大学 高强度、高韧性稀土镁合金
CN105483484A (zh) * 2016-02-04 2016-04-13 哈尔滨工业大学（威海） 制造各向同性高强度变形镁合金的方法
CN110541100A (zh) * 2019-09-30 2019-12-06 内蒙古民族大学 一种超高综合性能变形稀土镁合金材料及其制备方法

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