EP1420899B1 - Verfahren zur herstellung von strangförmigen produkten aus magnesium oder magnesiumlegierungen - Google Patents
Verfahren zur herstellung von strangförmigen produkten aus magnesium oder magnesiumlegierungen Download PDFInfo
- Publication number
- EP1420899B1 EP1420899B1 EP02760134A EP02760134A EP1420899B1 EP 1420899 B1 EP1420899 B1 EP 1420899B1 EP 02760134 A EP02760134 A EP 02760134A EP 02760134 A EP02760134 A EP 02760134A EP 1420899 B1 EP1420899 B1 EP 1420899B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnesium
- process according
- cold
- lubricant
- smoothed
- 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.)
- Expired - Lifetime
Links
Classifications
-
- 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
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
- B21C1/003—Drawing materials of special alloys so far as the composition of the alloy requires or permits special drawing methods or sequences
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C9/00—Cooling, heating or lubricating drawing material
Definitions
- the invention relates to a process for the preparation of strand-like products, such as wires, rods and tubes, from Magnesium or magnesium alloys, by sliding pull at Room temperature.
- the wires produced by the method can be used, for example, as welding consumables for the laser beam welding of magnesium materials. However, they can also be used, for example, as a substrate for physico-chemical coatings, such as for the new magnesium diboride superconductors MgB 2 (Nagamatsu, Nagakawa, T. Muranaka, Y. Zenitani and Akimitsu J. Nature 410 (2001) ) 63).
- the invention is based on the object, a method to That's the production of magnesium wires, rods and -tubes on the way of cold drawing allows.
- This object is achieved by a forming process in which the magnesium materials are subjected to a smoothing surface treatment prior to forming, which ensures the lowest possible surface roughness, wherein the value of the average roughness R z ⁇ 12 microns must be, and in which the cold drawing using on the forming material firmly adhering solid lubricant coatings is performed.
- the smoothing surface treatment is performed such that a surface roughness with an average roughness R z of 2 to 8 microns is generated.
- the surface of the magnesium materials Smoothed by means of peeling or grinding.
- the smoothed magnesium materials are removed before cooling with a strong, well-adhering lubricant film through Drying of liquid lubricant dispersions coated.
- Metal soap systems may be preferred as Lubricant can be used, the polymeric components such as cellulose derivatives or polyvinyl alcohol containing contribute to increasing the adhesion.
- Cold drawing is done with a 10% reduction in cross section 40%, preferably with a 20% reduction in the cross section carried out.
- the drawn product can finally be peeled, ground or freed from the oxide skin by pickling become. Thereafter, the covering layer-free product of a be subjected to chemical reaction.
- a chemical reaction can be carried out, by which on the surface of the product a magnesium diboride layer (MgB 2 ) is produced, which has superconducting properties.
- the method according to the invention is based on the idea that the starting material for the forming process in contrast the usual procedure as smooth as possible surface and that on this little rough surface a well-adhering lubricant layer is applied.
- the magnesium material is used before the Cold drawing subjected to the surface treatment, which is the Smoothing of forming material to a high degree.
- the smoothed material is then with a solid lubricant film with good Adhesion coated and can then with usual Drawing dies, for example made of hard metal, are drawn.
- a magnesium rod with a starting diameter of 30 mm is extruded at a temperature of 350 ° C.
- the extruded rod is peeled and drawn from a ⁇ 5.7 mm wire diameter over 4 stages at room temperature as follows: ⁇ 5.7 mm ⁇ 05.2 mm ⁇ 04.9 mm ⁇ 04.3 mm ⁇ 03.9 mm.
- This output wire is connected to the first drawing stage with a Solid lubricant type R261, the polyvinyl alcohol as Contains adhesive component, from a liquid dispersion coated and dried.
- the resulting solid film has calcium stearate as Lubricant base and allows the entire Ziehumformung without additional lubricant use.
- the wire drawn in this way can then be in Tightening process further up to a diameter ⁇ 1 mm where it may be necessary to: the surface of the wire between individual drawing stages a smoothing processing is subjected.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Extraction Processes (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Description
Ø5,7 mm → 05,2 mm → 04,9 mm → 04,3 mm → 03,9 mm.
Claims (10)
- Verfahren zur Herstellung von strangförmigen Produkten, wie Drähten, Stäben und Rohren, aus Magnesium oder Magnesiumlegierungen, dadurch gekennzeichnet, dass die Magnesiumwerkstoffe vor ihrer Umformung einer glättenden Oberflächenbearbeitung unterzogen werden, die eine möglichst geringe Oberflächenrauhigkeit gewährleistet, wobei der Wert der gemittelten Rauhtiefe Rz < 12 µm betragen muss, und dass das Kaltziehen unter Anwendung von auf dem Umformgut fest haftenden Festschmierstoff-Beschichtungen durchgeführt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass mit der glättenden Oberflächenbearbeitung eine Oberflächenrauhigkeit mit einer gemittelten Rauhtiefe Rz von 2 bis 8 µm erzeugt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Oberfläche der Magnesiumwerkstoffe mittels Ziehschälen geglättet wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Oberfläche der Magnesiumwerkstoffe mittels Schleifen geglättet wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die geglätteten Magnesiumwerkstoffe vor dem Kaltziehen mit einem festen, gut haftenden Schmierstofffilme durch Auftrocknen flüssiger Schmiermitteldispersionen beschichtet werden.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass vorzugsweise Metallseifensysteme als Schmierstoff verwendet werden, die polymere Komponenten enthalten, wie Zellulosederivate oder Polyvinylalkohol, die zur Steigerung der Haftfähigkeit beitragen.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass vor dem Kaltziehen feste Schmierstofffilme durch Aufpressen plastischer oder pastenartiger Schmierstoffe oder Schmierstoffgemische aufgebracht werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Kaltziehen mit Querschnittsabnahmen von 10 % bis 40 %, vorzugsweise mit Querschnittsabnahmen um 20 % durchgeführt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Kaltziehen mit Hartmetallziehsteinen durchgeführt wird.
- Verfahren nach Anspruch 1 bis 9, dadurch gekennzeichnet, dass das gezogene Produkt abschließend ziehgeschält, überschliffen oder durch Beizen von der Oxidhaut befreit wird, und dass danach das deckschichtfreie Produkt einer chemischen Reaktion unterworfen wird, vorzugsweise mit Diboran in reinem Wasserstoff, durch die auf der Oberfläche des Produktes eine Magnesiumdiborid-Schicht (MgB2) erzeugt wird, die supraleitende Eigenschaften hat.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10142204A DE10142204A1 (de) | 2001-08-24 | 2001-08-24 | Verfahren zur Herstellung von strangförmigen Produkten aus Magnesium oder Magnesiumlegierungen |
| DE10142204 | 2001-08-24 | ||
| PCT/DE2002/003125 WO2003018225A1 (de) | 2001-08-24 | 2002-08-22 | Verfahren zur herstellung von strangförmigen produkten aus magnesium oder magnesiumlegierungen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1420899A1 EP1420899A1 (de) | 2004-05-26 |
| EP1420899B1 true EP1420899B1 (de) | 2005-10-26 |
Family
ID=7696916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02760134A Expired - Lifetime EP1420899B1 (de) | 2001-08-24 | 2002-08-22 | Verfahren zur herstellung von strangförmigen produkten aus magnesium oder magnesiumlegierungen |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1420899B1 (de) |
| AT (1) | ATE307691T1 (de) |
| DE (2) | DE10142204A1 (de) |
| WO (1) | WO2003018225A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4862983B2 (ja) * | 2005-03-22 | 2012-01-25 | 住友電気工業株式会社 | マグネシウム溶接線の製造方法 |
| DE102006014790A1 (de) * | 2006-03-29 | 2007-10-11 | Getrag Ford Transmissions Gmbh | Getriebe mit Ausgleichsscheibe |
| CN103170516B (zh) * | 2013-03-05 | 2015-11-18 | 广州有色金属研究院 | 一种镁或镁合金毛细管的短流程制备方法 |
| CN104174685B (zh) * | 2014-07-28 | 2015-12-09 | 攀钢集团江油长城特殊钢有限公司 | 汽轮机转子槽锲用异型棒材及其加工方法 |
| CN106269937B (zh) * | 2016-08-31 | 2019-02-22 | 福机机械工业(宁波)有限公司 | 一种汽车发动机油路系统安装支架的毛坯冷拉工艺 |
| CN115255825A (zh) * | 2022-07-29 | 2022-11-01 | 上海工程技术大学 | 一种高轴径比细晶结构的镁合金线材制备工艺 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19834853A1 (de) * | 1998-08-01 | 2000-02-03 | August Neuhoff Fa | Trägermaterial und dessen Verwendung sowie Verfahren zur Kaltumformung |
-
2001
- 2001-08-24 DE DE10142204A patent/DE10142204A1/de not_active Withdrawn
-
2002
- 2002-08-22 AT AT02760134T patent/ATE307691T1/de not_active IP Right Cessation
- 2002-08-22 WO PCT/DE2002/003125 patent/WO2003018225A1/de not_active Ceased
- 2002-08-22 EP EP02760134A patent/EP1420899B1/de not_active Expired - Lifetime
- 2002-08-22 DE DE50204707T patent/DE50204707D1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1420899A1 (de) | 2004-05-26 |
| ATE307691T1 (de) | 2005-11-15 |
| DE10142204A1 (de) | 2003-03-06 |
| DE50204707D1 (de) | 2005-12-01 |
| WO2003018225A1 (de) | 2003-03-06 |
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