[go: up one dir, main page]

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
Application number
DE1903152848D
Other languages
German (de)
Filing date
Publication of DE152848C publication Critical patent/DE152848C/de
Application filed filed Critical
Priority to AT18611D priority Critical patent/AT18611B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Description

SS. JJ
ca bet Sca bet S ■ J■ J filz <2£nfelt <2 £ n W OCAW OCA 1 C '< 1 C '<
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)

oder Schweißen gewonnenen Körper und insbesondere auch zu Drähten gezogen werden kann.or welding body and in particular also drawn into wires can. Patent-A ν Spruch:Patent-A ν saying: Verfahren zur Herstellung homogener Körper aus Tantalmetall oder anderen schwer schmelzbaren Metallen, gekennzeichnet dadurch, daß das auf beliebigem Wege hergestellte Metallpulver zunächst durch Zusammenpressen oder Zusammensintern zu einem hinreichend festen Körper vereinigt wird und hierauf durch Hindurchleiten eines elektrischen Stromes im Vakuum oder indifferenter Umgebung bis zum Schmelzen erhitzt wird.Process for the production of homogeneous bodies from tantalum metal or others Difficult-to-melt metals, characterized in that the metal powder produced in any way initially by pressing or sintering together to form a sufficiently solid body is combined and then by passing an electric current in a vacuum or an indifferent environment up to is heated to melt.
DE1903152848D 1903-01-19 1903-01-19 Expired - Lifetime DE152848C (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
DE2049757A1 (en) Process for the manufacture of coated articles
DE1295842B (en) Use of a ruthenium-rhenium alloy
DE152848C (en)
DE1189723B (en) Process for sintering and simultaneous diffusion metallization of molded parts
AT18611B (en) Process for the production of homogeneous bodies from tantalum metal or other difficult-to-melt metals.
DE1260154B (en) Ruthenium sintered alloy and the use and manufacture of the same
DE1783126A1 (en) Welding electrode
DE2656929A1 (en) NICKEL-CHROME ALLOY
AT2017U1 (en) USE OF A MOLYBDENUM / TUNGSTEN ALLOY IN COMPONENTS FOR GLASS MELTING
DE1758043A1 (en) Material of high mechanical strength and heat resistance
DE1458388A1 (en) Tantalum alloy with special strength
DE1950260C3 (en) Use of a sintered molybdenum-boron alloy
DE1924869A1 (en) Process for producing a nickel-aluminum alloy
DE1290723B (en) Use of a zirconium oxide-containing material for resistance to oxidic melts with high resistance to oxidic melts at high temperatures, in particular to glass melts
DE60016420T2 (en) CHROME BASED ALLOY WITH EXCELLENT BALANCE BETWEEN STRENGTH AND DUCTILITY AT HIGH TEMPERATURES
DE1139281B (en) Composite material for electrical contacts
DE1483356A1 (en) Process for producing a tungsten-rhenium alloy
DE895608C (en) Process for producing a material suitable for high-strength components and devices
CH617289A5 (en) Method for producing an electrical contact material
DE925276C (en) Wear-resistant materials
DE690816C (en) Process for producing sintered hard metal alloys
DE571750C (en) Process for improving the mechanical properties of alloys which have such an antimonide content that the material has a high degree of brittleness in the as-cast state
DE1157720B (en) Silicon carbide heating element with good conductive connection ends
DE819458C (en) Alloy for the production of welding electrodes for resistance welding
DE1771970B2 (en) Process for the production of heat-resistant, carbon-containing bodies