AT60965B - Process for making ductile tungsten metal. - Google Patents
Process for making ductile tungsten metal.Info
- Publication number
- AT60965B AT60965B AT60965DA AT60965B AT 60965 B AT60965 B AT 60965B AT 60965D A AT60965D A AT 60965DA AT 60965 B AT60965 B AT 60965B
- Authority
- AT
- Austria
- Prior art keywords
- tungsten metal
- tungsten
- metal
- ductile tungsten
- sintering
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title description 10
- 229910052721 tungsten Inorganic materials 0.000 title description 9
- 239000010937 tungsten Substances 0.000 title description 9
- 229910052751 metal Inorganic materials 0.000 title description 7
- 239000002184 metal Substances 0.000 title description 7
- 238000005245 sintering Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 241001085205 Prenanthella exigua Species 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Description
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Verfahren zur Herstellung duktilen Wolframmetalles.
Man hat in letzterer Zeit die Bedingungen ermittelt, unter welchen das sonst spröde Wolframmetall duktil wird. Dieser Zustand wird durch folgende Arbeitsvorgänge erreicht : Pulverförmiges Wolfram wird unter hohem Drucke zu Stäben gepresst. Diese Stäbe werden zum Zwecke des Sinterns mit hohen Stromstärken beschickt und hierauf einer mechanischen Bearbeitung unterworfen. Das so vorbereitete Material lässt sich bei hohen Temperaturen zu allerfeinsten Drähten ziehen.
Könnte man von vorher geschmolzenen Stäben aus Wolfram ausgehen, so würde infolge der dichten Beschaffenheit des Ausgangsmaterials die Bearbeitungsfähigkeit sehr gunstig beeinflusst werden, dem stehen aber unüberwindliche technische Schwierigkeiten
EMI1.1
Die vorliegende Erfindung bezweckt die Herstellung von Wolframstäben. deren strukturelle Beschaffenheit derjenigen des geschmolzenen Wolframs am nächsten kommt und erreicht dieses Ziel dadurch, dass der aus Pulver gepresste Wolframköper während des Sinterprozesses-also im Zustande des Erweichens - eimem möglichst hohen Druck ausgesetzt wird.
Eine beispielsweise Ausführungsform dieses Verfahrens besteht darin, das Wolframpulver in einem Zylinder ans isolierendem Material oder aus Meta !) mit isolierender Ausfiltterung zusammengepresst wird, während man gleichzeitig mittels elektrischen Stromes bis auf helle Weissglut erhitzt.
Durch den gleichzeitigen Sinter- und Pressprozess, wobei Drucke von 3000 bis 5000 kg
EMI1.2
Toichpn zu einem sehr dichten Körper befördert. Das Metall erlangt dadurch eine Be- seliaffeniteit, die es zur weiteren Verarbeitung unjgemein geeignet macht.
Auch lässt sich das Pressen und Sintern mit dem Hämmern kombinieren, so dass alle
EMI1.3
PATENT-ANSPRÜCHE :
1. Verfahren zur Herstellung duktilen Wolfram-Metalles durch Sintern von aus Wolframputver gepressten Stäben oder Platten, dadurch gekennzeichnet, dass das Metall-
EMI1.4
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Process for making ductile tungsten metal.
The conditions under which the otherwise brittle tungsten metal becomes ductile have recently been determined. This state is achieved through the following operations: Powdered tungsten is pressed into rods under high pressure. These rods are charged with high currents for the purpose of sintering and then subjected to mechanical processing. The material prepared in this way can be drawn into the finest wires at high temperatures.
If one could start from previously melted tungsten rods, then, due to the dense nature of the starting material, the machinability would be influenced very favorably, but there are insurmountable technical difficulties
EMI1.1
The present invention aims at the manufacture of tungsten rods. the structural properties of which come closest to that of molten tungsten and achieve this goal in that the tungsten body pressed from powder is exposed to the highest possible pressure during the sintering process, i.e. in the softening state.
An example embodiment of this method consists in compressing the tungsten powder in a cylinder on the insulating material or made of metal!) With insulating filtering, while at the same time heating it to bright white heat by means of an electric current.
Due to the simultaneous sintering and pressing process, with pressures from 3000 to 5000 kg
EMI1.2
Toichpn promoted to a very dense body. This gives the metal a beselia affinity that makes it extremely suitable for further processing.
Pressing and sintering can also be combined with hammering, so that all
EMI1.3
PATENT CLAIMS:
1. A process for the production of ductile tungsten metal by sintering bars or plates pressed from Wolframputver, characterized in that the metal
EMI1.4
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT60965T | 1911-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT60965B true AT60965B (en) | 1913-09-10 |
Family
ID=3582822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT60965D AT60965B (en) | 1911-11-29 | 1911-11-29 | Process for making ductile tungsten metal. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT60965B (en) |
-
1911
- 1911-11-29 AT AT60965D patent/AT60965B/en active
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