DE409505C - Manufacture of hard, acid-resistant alloys for gold nibs - Google Patents

Manufacture of hard, acid-resistant alloys for gold nibs

Info

Publication number
DE409505C
DE409505C DEH94743D DEH0094743D DE409505C DE 409505 C DE409505 C DE 409505C DE H94743 D DEH94743 D DE H94743D DE H0094743 D DEH0094743 D DE H0094743D DE 409505 C DE409505 C DE 409505C
Authority
DE
Germany
Prior art keywords
acid
hard
manufacture
resistant alloys
alloys
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
Application number
DEH94743D
Other languages
German (de)
Inventor
Dr Ernst Haagn
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.)
WC Heraus GmbH and Co KG
Original Assignee
WC Heraus GmbH and Co KG
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.)
Filing date
Publication date
Application filed by WC Heraus GmbH and Co KG filed Critical WC Heraus GmbH and Co KG
Priority to DEH94743D priority Critical patent/DE409505C/en
Application granted granted Critical
Publication of DE409505C publication Critical patent/DE409505C/en
Expired 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
    • C22C1/10—Alloys containing non-metals
    • C22C1/1036—Alloys containing non-metals starting from a melt
    • C22C1/1068—Making hard metals based on borides, carbides, nitrides, oxides or silicides

Landscapes

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

Description

Herstellung von harten, säurebeständigen Legierungen für Goldfederspitzen. Die Erfindung bezieht sich auf ein Verfahren zur Herstellung harter, säurebeständiger Legierungen für Goldfederspitzen. In dem Patent 374046 ist eine Legierung beschrieben, welche als Ersatz für das natürliche Osmium-Iridium oder auch für andere künstliche Legierungen der Platinmetalle dienen soll. Es hat sich ergeben, daß die Härte und die Zähigkeit doch nicht groß genug ist, um eine Schleiffestigkeit zu erzielen, welche an die der natürlichen oder künstlichen Legierungen der Platinmetalle heranreicht. Systematische Schleifversuche mit einer großen Anzahl anderer Legierungen haben ergeben, daß Legierungen von Wolfram mit Platin von io bis 15 Prozent Gehalt die den Platinlegierungen entsprechende Härte und Zähigkeit besitzen, wenn diese Legierungen auch noch einen geringen Gehalt an Kohlenstoff enthalten, und zwar muß dieser Gehalt unterhalb des für die Formel WC entsprechenden Gehalts von r1/2 Prozent Kohlenstoff liegen. Bekanntlich läßt sich in kohlenstoff- oder kohlenoxydhaltigen Gasen durch Erhitzung auf etwa 700 bis 80o° und durch Einhaltung einer bestimmten Zeit fast jeder beliebige Kohlenstoffgehalt bei Wolframpulver erzielen. Durch eine geringe Kohlenstoffbeimengung in den erwähnten Grenzen wird eine sehr glatte Schmelzung im Lichtbogen erzielt und eine Legierung von ausgezeichneter Härte, welche gegen verdünnte Schwefelsäure vollkommen widerstandsfähig ist, so daß sie für den vorliegenden Zweck besonders brauchbar ist. Wenn auch bisher bekannt war, daß durch Kohlenstoffgehalt die Härte von Wolfram gesteigert werden kann, so war aber nicht bekannt, daß gerade durch Zusatz von Platin eine Legierung erzeugt wird, welche für den beabsichtigten Zweck besonders geeignet ist.Manufacture of hard, acid-resistant alloys for gold nib tips. The invention relates to a method for producing hard, acid-resistant alloys for gold nib tips. In the patent 374046 an alloy is described, which is to serve as a substitute for the natural osmium-iridium or also for other artificial alloys of the platinum metals. It has been found that the hardness and toughness are not great enough to achieve a grinding strength which comes close to that of the natural or artificial alloys of the platinum metals. Systematic grinding tests with a large number of other alloys have shown that alloys of tungsten with platinum from 10 to 15 percent content have the hardness and toughness corresponding to the platinum alloys, if these alloys also contain a low content of carbon, and this content must are below the corresponding content of r1 / 2 percent carbon for the formula WC. It is known that in gases containing carbon or carbon oxide, almost any carbon content can be achieved in tungsten powder by heating to about 700 to 80 ° and by observing a certain time. By adding a small amount of carbon within the limits mentioned, a very smooth melting in the arc is achieved and an alloy of excellent hardness, which is completely resistant to dilute sulfuric acid, so that it is particularly useful for the present purpose. Even if it was previously known that the hardness of tungsten can be increased by the carbon content, it was not known that an alloy which is particularly suitable for the intended purpose is produced by adding platinum.

Claims (1)

PATENT-ANSPRUCH: Verfahren zur Herstellung von harten, säurebeständigen Legierungen für Goldfederspitzen, dadurch gekennzeichnet, daß eine Legierung von Wolfram mit io bis 15 Prozent Platin und einem Koh7lenstoffgehalt bis zu höchstens il/, Prozent durch Schmelzen im Lichtbogen hergestellt wird.PATENT CLAIM: Process for the production of hard, acid-resistant Alloys for gold nibs, characterized in that an alloy of Tungsten with 10 to 15 percent platinum and a carbon content of up to a maximum il /, percent is produced by melting in an electric arc.
DEH94743D 1923-09-11 1923-09-11 Manufacture of hard, acid-resistant alloys for gold nibs Expired DE409505C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH94743D DE409505C (en) 1923-09-11 1923-09-11 Manufacture of hard, acid-resistant alloys for gold nibs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH94743D DE409505C (en) 1923-09-11 1923-09-11 Manufacture of hard, acid-resistant alloys for gold nibs

Publications (1)

Publication Number Publication Date
DE409505C true DE409505C (en) 1925-02-06

Family

ID=7167083

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH94743D Expired DE409505C (en) 1923-09-11 1923-09-11 Manufacture of hard, acid-resistant alloys for gold nibs

Country Status (1)

Country Link
DE (1) DE409505C (en)

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