EP1420899A1 - Verfahren zur herstellung von strangförmigen produkten aus magnesium oder magnesiumlegierungen - Google Patents
Verfahren zur herstellung von strangförmigen produkten aus magnesium oder magnesiumlegierungenInfo
- Publication number
- EP1420899A1 EP1420899A1 EP02760134A EP02760134A EP1420899A1 EP 1420899 A1 EP1420899 A1 EP 1420899A1 EP 02760134 A EP02760134 A EP 02760134A EP 02760134 A EP02760134 A EP 02760134A EP 1420899 A1 EP1420899 A1 EP 1420899A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnesium
- lubricant
- cold drawing
- carried out
- 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.)
- Granted
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 OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes 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 OR PROFILES, 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 method for producing strand-like products, such as wires, rods and tubes, from
- the wires produced by the process can be used, for example, as filler metals for laser beam welding of magnesium materials. However, they can also be used, for example, as a base for physico-chemical coatings, such as for the new magnesium diboride superconductor MgB 2 (J. Nagamatsu, N. Nagakawa, T. Muranaka, Y. Zenitani and J. Akimitsu: Nature 410 (2001 ) 63).
- soaps and waxes are used as lubricants for light forming and that talc and graphite are used for more demanding forming at elevated temperatures (S. Kalpak ⁇ ian: Manufacturing Processes for Engineering Materials, Addison-Wessley Publishing Company, Readmg, Massachusetts, USA, 1991, p.342).
- the invention is based on the object of providing a method which enables the production of magnesium wires, rods and tubes by cold drawing.
- This task is solved with a forming process in which the magnesium materials are subjected to a smooth surface treatment before they are formed, which ensures the lowest possible surface roughness, the mean surface roughness value R z ⁇ 12 ⁇ m, and in which cold drawing using solid lubricant coatings adhering firmly to the material to be formed.
- the smooth surface treatment is carried out in such a way that a surface roughness with an average roughness depth R z of 2 to 8 ⁇ m is generated.
- the surface of the magnesium materials is expediently smoothed using drawing shells or grinding.
- the smoothed magnesium materials are coated with a firm, well-adhering lubricant film by drying up liquid lubricant dispersions.
- Metal selenium systems which contain polymeric components, such as cellulose derivatives or polyvinyl alcohol, which contribute to increasing the adhesiveness, can preferably be used as the lubricant. Before cold drawing, solid lubricant films can also be applied by pressing on plastic or paste-like lubricants or lubricant mixtures.
- the cold drawing is carried out with a decrease in cross section of 10% to 40%, preferably with a decrease in cross section of 20%.
- the drawn product can finally be drawn-coated, smoothed over or freed from the oxide skin by pickling.
- the top layer-free product can then be subjected to a chemical reaction.
- a chemical reaction can be carried out on the surface in pure hydrogen with diborane, by means of which a magnesium diboride layer (MgB 2 ) is produced on the surface of the product, which has superconducting properties.
- MgB 2 magnesium diboride layer
- the method according to the invention is based on the idea that the starting material for the shaping process, in contrast to the conventional method, must have a surface that is as smooth as possible and that, in addition, a well-adhering lubricant layer is applied to this slightly rough surface.
- the magnesium material is subjected to surface treatment before cold drawing, which smoothes the material to a high degree.
- the smoothed material is then coated with a solid lubricant film with good adhesion and can then be drawn using conventional drawing dies, for example made of hard metal.
- a magnesium rod with an initial diameter of 30 mm is extruded at a temperature of 350 ° C.
- the extruded rod is peeled and drawn starting from 0 5.7 mm wire diameter over 4 steps at room temperature as follows:
- this starting wire is coated with a solid lubricant of the R261 type, which contains polyvinyl alcohol as an adhesive component, from a liquid dispersion and dried.
- the resulting solid film has calcium stearate as the lubricant base and enables the entire drawing process to be carried out without the additional use of lubricant.
- the wire drawn in this way can then be further processed in the fine drawing process up to a diameter of ⁇ 1 mm, it being necessary for the surface of the wire to be subjected to smoothing between individual drawing stages.
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
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10142204 | 2001-08-24 | ||
DE10142204A DE10142204A1 (de) | 2001-08-24 | 2001-08-24 | Verfahren zur Herstellung von strangförmigen Produkten aus Magnesium oder Magnesiumlegierungen |
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 true EP1420899A1 (de) | 2004-05-26 |
EP1420899B1 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 EP EP02760134A patent/EP1420899B1/de not_active Expired - Lifetime
- 2002-08-22 DE DE50204707T patent/DE50204707D1/de not_active Expired - Lifetime
- 2002-08-22 WO PCT/DE2002/003125 patent/WO2003018225A1/de not_active Application Discontinuation
- 2002-08-22 AT AT02760134T patent/ATE307691T1/de not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO03018225A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE307691T1 (de) | 2005-11-15 |
EP1420899B1 (de) | 2005-10-26 |
DE50204707D1 (de) | 2005-12-01 |
WO2003018225A1 (de) | 2003-03-06 |
DE10142204A1 (de) | 2003-03-06 |
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