US1800122A - Process for producing articles of refractory metal alloys - Google Patents

Process for producing articles of refractory metal alloys Download PDF

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Publication number
US1800122A
US1800122A US360326A US36032629A US1800122A US 1800122 A US1800122 A US 1800122A US 360326 A US360326 A US 360326A US 36032629 A US36032629 A US 36032629A US 1800122 A US1800122 A US 1800122A
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US
United States
Prior art keywords
refractory metal
metal alloys
producing articles
alloy
metal
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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
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US360326A
Inventor
Voigtlander Hermann
Kaufels Otto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Krupp Stahl AG
Fried Krupp AG
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Krupp Stahl AG
Priority date (The priority date 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 date listed.)
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Publication date
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Publication of US1800122A publication Critical patent/US1800122A/en
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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
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor

Definitions

  • the invention has for its object a new process for the production of an alloy which consists of carbide of tungsten or molybdenum and of a lower melting metal or metalloid.
  • This object is obtained according to the invention b melting down an alloy consisting of said re ractory metals and of a lower melting metal or metalloid and carbon, and by pulverizing and sintering the mass.
  • the process may be performed e. g. in the following manner:
  • an alloy is melted down containing at least 80 per cent of tungsten, at most per cent 15 of a lower melting metal or metalloid (e. g. nickel, chromium, cobalt, iron, or silicon) and carbon. After solidification this alloy is pulverized as finely as possible and shaped to pressed bodies which are finally subjected go to a sintering rocess that intimately unites the particles 0 the bodies.
  • the temperature required for the sintering o eration lies at about 2200 to 2400 degrees
  • the sintered alloy produced in this manner is remarkable when compared with a cast alloy of the same composition for its greater ability to withstand the shocks to which tools are unavoidably exposed.
  • the present alloy In comparison with an alloy of the same composition but obtained by sinterin a mixture of carbide of tungsten or moly denum and of a lower melting auxiliary metal the present alloy possesses the advantage, especially important for tools, that the'finished alloy resists a much higher heating than the former.

Description

Patented Apr. 7, 1931 UNITED STATES PATENT OFFICE nnmumr vororninnnn Ann o'r'ro norms, on ssnn, GERMANY, assmnons T ramp. xaurr ax'rmuensnnscnarr, or ESSEN-ON-THE-RUHR, enemy PROCESS FOB'IPRODUCING ARTICLES 01 BEIRAGIORY'METAL ALLOYS Io Drawing. Application filed May 3, 1829, Serial No. 360,826, and in Germany May 2, 1928.
The invention has for its object a new process for the production of an alloy which consists of carbide of tungsten or molybdenum and of a lower melting metal or metalloid.
This object is obtained according to the invention b melting down an alloy consisting of said re ractory metals and of a lower melting metal or metalloid and carbon, and by pulverizing and sintering the mass.
1 The process may be performed e. g. in the following manner:
In a carbon or graphite resistance furnace an alloy is melted down containing at least 80 per cent of tungsten, at most per cent 15 of a lower melting metal or metalloid (e. g. nickel, chromium, cobalt, iron, or silicon) and carbon. After solidification this alloy is pulverized as finely as possible and shaped to pressed bodies which are finally subjected go to a sintering rocess that intimately unites the particles 0 the bodies. The temperature required for the sintering o eration lies at about 2200 to 2400 degrees The sintered alloy produced in this manner is remarkable when compared with a cast alloy of the same composition for its greater ability to withstand the shocks to which tools are unavoidably exposed. In comparison with an alloy of the same composition but obtained by sinterin a mixture of carbide of tungsten or moly denum and of a lower melting auxiliary metal the present alloy possesses the advantage, especially important for tools, that the'finished alloy resists a much higher heating than the former.
We claim:
1. The process of producing articles of refractory metal alloys, which comprises melting together a refractory metal, a metal or metalo1d having a lower melting point, and carbon; allowing the fused massjo solidify; pulverizing the solidified mass, pressing the powder so produced into a body of any desired shape, and then sintering the body.
2. The process of producing articles of refractory metal alloys, which comprises melting together one of the metals tungsten or molybdenum, a metal or metalloid having a lower melting point and carbon; allowing the fused mass to solidify; pulverizing the solidified mass, pressing the powder so produced into a body of any desired shape, and then sintering the body.
The foregoing specification signed at gggggne, Germany, this 18th day of April,
HERMANN VOIGTLFLNDER. OTTO KAUFELS.
US360326A 1928-05-02 1929-05-03 Process for producing articles of refractory metal alloys Expired - Lifetime US1800122A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1800122X 1928-05-02

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US1800122A true US1800122A (en) 1931-04-07

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US360326A Expired - Lifetime US1800122A (en) 1928-05-02 1929-05-03 Process for producing articles of refractory metal alloys

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2630383A (en) * 1950-04-26 1953-03-03 Gen Electric Method of making a porous sintered carbide tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2630383A (en) * 1950-04-26 1953-03-03 Gen Electric Method of making a porous sintered carbide tool

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