DE951590C - Use of a sintered hard metal alloy - Google Patents

Use of a sintered hard metal alloy

Info

Publication number
DE951590C
DE951590C DEK9677A DEK0009677A DE951590C DE 951590 C DE951590 C DE 951590C DE K9677 A DEK9677 A DE K9677A DE K0009677 A DEK0009677 A DE K0009677A DE 951590 C DE951590 C DE 951590C
Authority
DE
Germany
Prior art keywords
metal alloy
hard metal
carbide
sintered hard
metals
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
DEK9677A
Other languages
German (de)
Inventor
Dr Phil Josef Hinnueber
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.)
Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie
Original Assignee
Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie
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 Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie filed Critical Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie
Priority to DEK9677A priority Critical patent/DE951590C/en
Application granted granted Critical
Publication of DE951590C publication Critical patent/DE951590C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • C23C30/005—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process on hard metal substrates
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Powder Metallurgy (AREA)

Description

Verwendung einer gesinterten Hartmetallegierung Zusatz zum Patent 948 449 Den Gegenstand des Patents 948 449 bildet unter anderem die Verwendung einer gesinterten Hartmetallegierung, die aus 1o bis 30% Tantalkarbid, i bis 2o% Wolframkarbid, 0,3 bis 2o% Chromkarbid, bis zu 25% eines Metalls oder mehrere Metalle der Eisengruppe, Rest 5o bis 8o%, Titankarbid besteht, als Werkstoff für Gegenstände, die im Betrieb einer oxydierenden Atmosphäre bei hohen Temperaturen, z. B. 8oo° C, ausgesetzt werden.Use of a sintered hard metal alloy Addition to the patent 948 449 The subject matter of patent 948 449 is, among other things, the use of a sintered hard metal alloy consisting of 1o to 30% tantalum carbide, i to 2o% tungsten carbide, 0.3 to 20% chromium carbide, up to 25% of a metal or several metals of the iron group, The remainder 5o to 8o%, consists of titanium carbide, as a material for objects that are in operation an oxidizing atmosphere at high temperatures, e.g. B. 8oo ° C, are exposed.

Es hat sich nun gezeigt, daß in dieser Legierung - offenbar bedingt durch die starke Wirkung des Chromkarbids - der Titankarbidgehalt bis auf 35010 gesenkt werden kann, ohne d'aß eine merkliehe Verschlechterung der Verschleißfestigkeit und Oxydationsbeständigkeit in Erscheinung tritt. Für bestimmte Anwendungszwecke eignet sich diese durch herabgesetzte Titankarbidgehalte gekennzeichnete Hartmetallegierung sogar besser als die entsprechend dem Hauptpatent mit höherem Titankarb:idgehalt zu verwendende Hartmetalllegierung.It has now been shown that in this alloy - apparently due to the strong action of chromium carbide - the titanium carbide content can be reduced to 35010 without a noticeable deterioration in wear resistance and oxidation resistance. This hard metal alloy, which is characterized by reduced titanium carbide content, is even better suited for certain applications than the hard metal alloy to be used with a higher titanium carbide content according to the main patent.

Außerdem hat es sich herausgestellt, daß bei einer solchen, einen herabgesetzten Titankarbidgehalt aufweisenden Legierung ein verhältnismäßig hoher Gehalt an wenigstens einem Metall der Eisengruppe, insbesondere Kobalt, sehr förderlich ist und der Gehalt an solchem Metall über die in dem Hauptpatent angegebene obere Grenze von 250/0 hinaus bis zu 3090 gesteigert werden kann. Diese Festellung beruht offenbar darauf, daß bei auftretender Oxydation das entstehende Oxyd des Metalls der Eisengruppe, insbesondere Kobaltoxyd, mit den entstehenden Oxydationsprodukten der Karbide verhältnismäßig stabile Lösungen oder Verbindungen eingeht, die eine gut haftende oxydationswiderstandsfähige Oberflächenschicht auf der Legierung bilden.In addition, it has been found that in such an alloy having a reduced titanium carbide content a relatively high content of at least one metal of the iron group, in particular cobalt, is very beneficial and the content of such metal is above the upper limit of 250 / given in the main patent. 0 can be increased up to 3090. This finding is apparently based on the fact that when oxidation occurs, the resulting oxide of the metal of the iron group, in particular cobalt oxide, forms relatively stable solutions or compounds with the resulting oxidation products of the carbides, which form a well-adhering, oxidation-resistant surface layer on the alloy.

Claims (1)

PATENTANSPRÜCHE: i. Verwendung einer gesinterten Hartmetalllegierung nach Patent 948!449, bestehend aus io bis 30% Tantalkarbid, i bis 2o'% Wolframkarbid, 0,3 bis 2o0/a Chromkarbid, bis zu 25 % eines Metells oder mehrerer Metalle der Eisengruppe, Rest 35 bis weniger als 5o % Titankarbid, als Werkstoff für Gegenstände, die im Betrieb einer oxydierenden Atmosphäre bei hohen Temperaturen, z. B. bei 8oo° C, ausgesetzt werden. z. Verwendung einer Hartmetallegierung nach Anspruch i, bei der die obere Grenze für den Gehalt an einem Metall oder mehreren Metallen der Eisengruppe, insbesondere Kobalt, bis auf 30% erhöht ist, für den Zweck nach Anspruch i. In Betracht gezogene Druckschriften: Österreichische Patentschrift Nr. 135 049; britische Patentschrift Nr. 443 303; Metals Transactions, Bd. 185 (Dez. i949), S.988. PATENT CLAIMS: i. Use of a sintered hard metal alloy according to patent 948! 449, consisting of 10 to 30% tantalum carbide, 1 to 20% tungsten carbide, 0.3 to 20% chromium carbide, up to 25% of a metal or several metals of the iron group, remainder 35 to less than 5o% titanium carbide, as a material for objects that operate in an oxidizing atmosphere at high temperatures, e.g. B. at 8oo ° C, are exposed. z. Use of a hard metal alloy according to claim i, in which the upper limit for the content of one metal or more metals of the iron group, in particular cobalt, is increased to 30%, for the purpose according to claim i. Documents considered: Austrian Patent No. 135 049; British Patent No. 443,303; Metals Transactions, Vol. 1 85 (December I949), S.988.
DEK9677A 1951-04-19 1951-04-19 Use of a sintered hard metal alloy Expired DE951590C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK9677A DE951590C (en) 1951-04-19 1951-04-19 Use of a sintered hard metal alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK9677A DE951590C (en) 1951-04-19 1951-04-19 Use of a sintered hard metal alloy

Publications (1)

Publication Number Publication Date
DE951590C true DE951590C (en) 1956-10-31

Family

ID=7212531

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK9677A Expired DE951590C (en) 1951-04-19 1951-04-19 Use of a sintered hard metal alloy

Country Status (1)

Country Link
DE (1) DE951590C (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT135049B (en) * 1932-04-07 1933-10-25 Krupp Ag Sintered hard alloys.
GB443303A (en) * 1934-09-29 1936-02-26 Firth Sterling Steel Co Improvements in or relating to hard cemented carbide material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT135049B (en) * 1932-04-07 1933-10-25 Krupp Ag Sintered hard alloys.
GB443303A (en) * 1934-09-29 1936-02-26 Firth Sterling Steel Co Improvements in or relating to hard cemented carbide material

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