DE152848C - - Google Patents
Info
- Publication number
- DE152848C DE152848C DE1903152848D DE152848DA DE152848C DE 152848 C DE152848 C DE 152848C DE 1903152848 D DE1903152848 D DE 1903152848D DE 152848D A DE152848D A DE 152848DA DE 152848 C DE152848 C DE 152848C
- Authority
- DE
- Germany
- Prior art keywords
- metal
- melt
- melting
- tantalum
- difficult
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 5
- 229910052715 tantalum Inorganic materials 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 238000002844 melting Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000010309 melting process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 235000008469 Oxalis tuberosa Nutrition 0.000 description 1
- 240000000645 Oxalis tuberosa Species 0.000 description 1
- 230000001427 coherent Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atoms Chemical class [H]* 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/24—Obtaining niobium or tantalum
Description
ca bet Sca bet S
ΟΛ \V\W ti t ΛI Cl ΟΛ \ V \ W ti t ΛI Cl
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Die Verarbeitung sehr schwer schmelzbarer Metalle, insbesondere des Tantalmetalls bietet sehr große Schwierigkeiten, wenn es Γ "sich darum handelt, vollkommen homogene Körper herzustellen, besonders wird das Ziehen des Metalls außerordentlich erschwert, wenn als Ausgangsmaterial nicht ein vollkommen homogener Metallkörper verwendet wird, wie er nur durch einen vollkommenenThe processing of metals that are very difficult to melt, especially tantalum metal offers very great difficulties when it comes to Γ ", completely homogeneous Making bodies, especially the drawing of the metal is extremely difficult, if a completely homogeneous metal body is not used as the starting material, as can only be achieved by a perfect one
ίο Schmelzprozeß gewonnen werden kann.ίο Melting process can be obtained.
Das Schmelzen des Metalls ist aber mit erheblichen Schwierigkeiten verknüpft, da einesteils das Metall bei den hohen Temperaturen leicht chemische Verbindungen mit den Stoffen seiner Umgebung eingeht und andernteils nur schwer geeignete Gefäße zu bekommen sind, welche bei den hohen, für den Schmelzprozeß in Betracht kommenden Temperaturen noch beständig genug sind.The melting of the metal is associated with considerable difficulties because on the one hand the metal at the high temperatures easily chemical compounds with enters into the substances in its environment and, on the other hand, difficult to use suitable vessels are obtained, which are in the high, for the melting process into consideration Temperatures are still stable enough.
Gemäß vorliegender Erfindung nun wird ein für die weitere Verarbeitung geeignetes Material dadurch gewonnen, daß zunächst aus dem als Ausgangsmaterial dienenden Metallpulver durch Zusammenpressen oder Zusammensintern in an sich bekannter Weise ein zusammenhängender Körper von genügender Festigkeit hergestellt wird, welcher alsdann durch Hindurchleiten eines elektrischen Stromes bis zu seinem Schmelzpunkt erhitzt wird. Der Körper wird zu diesem Z\veck am besten zwischen Klemmen aus Tantalmetall selbst festgehalten und derart, geformt, daß zunächst an einer verschwächten Stelle, an welcher die Temperatur am höchsten ist, ein Durchschmelzen eintritt, worauf durch den entstehenden Lichtbogen weitere Mengen des Metalls bis zum Schmelzpunkt erhitzt werden. Selbstverständlich kann man auch derart verfahren, daß man zwischen zwei aus Tantal bestehenden Elektroden einen Lichtbogen bildet, in welchem das Metall zum Schmelzen kommt. Würde man zur Bildung des Lichtbogens andere Materialien, z. B. Kohlen, nehmen und in deren Lichtbogen das Metall zu schmelzen versuchen, so läge die Gefahr vor, daß das Metall in Karbid verwandelt wird. Aus demselben Grunde würde für vorliegenden Zweck auch das bekannte Verfahren nicht anwendbar sein, wonach Tantaloxyd in einen Tiegel durch einen Lichtbogen zum Schmelzen gebracht wird, welcher zwischen Elektroden aus anderem Material gebildet wird.According to the present invention, a material suitable for further processing is now obtained obtained in that initially from the metal powder serving as the starting material by pressing or sintering together in a manner known per se a coherent body of sufficient Strength is established, which then by passing an electric Stromes is heated to its melting point. The body is best made between clamps at this point Tantalum metal itself held and shaped in such a way that initially weakened on one At the point at which the temperature is highest, a meltdown occurs, whereupon by the resulting arc heats additional amounts of the metal to its melting point will. Of course, you can also proceed in such a way that you can choose between two Existing tantalum electrodes form an arc in which the metal is used Melting is coming. If other materials, e.g. B. Take coals and try to melt the metal in their arcs, that would be the place There is a risk that the metal will be transformed into carbide. For the same reason would For the present purpose also the known method cannot be used, according to which tantalum oxide is poured into a crucible by means of an electric arc is caused to melt, which is formed between electrodes made of another material.
Um jede Verunreinigung des Metalls und jeden \7erlust an Metall zu vermeiden, ist es notwendig, den Schmelzprozeß in einer durchaus indifferenten Atmosphäre vorzunehmen. Da die meisten in anderen Fällen hierfür gewöhnlich in Betracht gezogenen Gase, wie Stickstoff, Wasserstoff, usw., in bezug auf das Tantal bei den in Betracht kommenden Temperaturen nicht indifferent sind, so kommt praktisch hauptsächlich zunächst nur ein möglichst vollkommenes Vakuum in Betracht.Around each of the metal contamination and any \ 7 erlust to avoid to metal, it is necessary to carry out the melting process in a completely inert atmosphere. Since most of the gases usually considered for this purpose in other cases, such as nitrogen, hydrogen, etc., are not indifferent to the tantalum at the temperatures in question, in practice only a vacuum that is as perfect as possible comes into consideration initially.
Die auf diese Art gewonnenen Schmelzkörper stellen ein vollkommen homogenes Metall dar, das sich sehr viel leichter verarbeiten läßt als die durch Pressen, SinternThe melting bodies obtained in this way are completely homogeneous Metal that is much easier to process than that by pressing or sintering
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT18611D AT18611B (en) | 1903-01-19 | 1903-12-05 | Process for the production of homogeneous bodies from tantalum metal or other difficult-to-melt metals. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE152848C true DE152848C (en) |
Family
ID=419534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1903152848D Expired - Lifetime DE152848C (en) | 1903-01-19 | 1903-01-19 |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE152848C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2782114A (en) * | 1953-12-18 | 1957-02-19 | Ici Ltd | Melting of high melting point metals or alloys |
-
1903
- 1903-01-19 DE DE1903152848D patent/DE152848C/de not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2782114A (en) * | 1953-12-18 | 1957-02-19 | Ici Ltd | Melting of high melting point metals or alloys |
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