EP0195965B1 - Hartmetall und Verfahren zu seiner Herstellung - Google Patents

Hartmetall und Verfahren zu seiner Herstellung Download PDF

Info

Publication number
EP0195965B1
EP0195965B1 EP86102983A EP86102983A EP0195965B1 EP 0195965 B1 EP0195965 B1 EP 0195965B1 EP 86102983 A EP86102983 A EP 86102983A EP 86102983 A EP86102983 A EP 86102983A EP 0195965 B1 EP0195965 B1 EP 0195965B1
Authority
EP
European Patent Office
Prior art keywords
weight
sintered
hard metal
percent
sintering
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
EP86102983A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0195965A3 (en
EP0195965A2 (de
Inventor
Johannes Kolaska
Norbert Dr.-Ing. Reiter
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.)
Fried Krupp AG
Original Assignee
Fried Krupp 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.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6266548&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0195965(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fried Krupp AG filed Critical Fried Krupp AG
Priority to AT86102983T priority Critical patent/ATE56483T1/de
Publication of EP0195965A2 publication Critical patent/EP0195965A2/de
Publication of EP0195965A3 publication Critical patent/EP0195965A3/de
Application granted granted Critical
Publication of EP0195965B1 publication Critical patent/EP0195965B1/de
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
    • 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
    • C22C29/08—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 based on tungsten carbide
    • 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
    • C22C29/067—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 comprising a particular metallic binder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps

Definitions

  • the invention relates to a hard metal, the hard material phase of tungsten carbide and the binder metal phase of nickel and chromium and which is produced from powdered raw materials by pressing and sintering, and a method for its production.
  • Such hard metals are already known, because US Pat. No. 3,215,510 describes a hard metal which consists of 10 to 30% by weight of a chromium-nickel binding alloy and the remainder tungsten carbide, the weight ratio of chromium to binding metal being between 0.015 and 0. 15 lies, and which is made from powdered raw materials by pressing and sintering.
  • the invention has for its object to provide a hard metal of the type mentioned which, in addition to good corrosion resistance, also has high strength and in particular high toughness. Another object of the invention is to provide a method for producing the hard metal.
  • the hard metal contains, in addition to the hard material phase, 5 to 25% by weight of binder metal phase, which is composed of 5 to 15% by weight of chromium and the rest of nickel, and that the hard metal after sintering during a Time of 20 to 200 minutes in an inert gas atmosphere, preferably an argon atmosphere, at a temperature of 1300 to 1400 ° C and a pressure of 20 to 3000 bar.
  • the hard metal according to the invention is corrosion-resistant and has great strength and great toughness.
  • the strength and toughness of the hard metal according to the invention are even higher than in the case of corresponding tungsten carbide-cobalt hard metals, which according to current knowledge are distinguished by the highest strength and toughness.
  • the hard metal according to the invention is always non-magnetic, which is not always the case with the known hard metals. Because of its good properties, there are many possible uses for the hard metal according to the invention.
  • the tungsten carbide is replaced by titanium carbide, tantalum carbide and / or niobium carbide.
  • the object on which the invention is based is further achieved by a method for producing the hard metal, in which the sintered body is in a noble gas atmosphere, preferably an argon atmosphere, at a temperature of 1300 to 1400 ° C. and a pressure of 20 to 200 minutes 20 to 3000 bar can be treated.
  • a noble gas atmosphere preferably an argon atmosphere
  • the treatment of the sintered bodies according to the invention gives the hard metal good strength and toughness, which is attributed to a high degree of compaction of the hard metal structure.
  • the sintered bodies are cooled and then treated in a separate plant at 100 to 3000 bar or that the sintered bodies are treated in the sintering plant immediately after sintering at 20 to 100 bar. If the treatment of the sintered bodies according to the invention takes place immediately after their sintering, it is possible to work advantageously at particularly low pressure.
  • the powdered raw materials used for hard metal production have a particle size of 0.5 to 5 pm.
  • the hard metal is pressed and sintered according to the known methods.
  • the pressure should not be below 20 bar and the temperature should not be above 1400 ° C., since at a lower pressure there is insufficient compression of the structure and at a higher temperature there is an adverse enlargement of the structure. If the chromium content of the binder metal phase is greater than 15% by weight, chromium carbide precipitates occur in the hard metal structure, as a result of which the properties of the hard metal deteriorate sustainably.
  • the following table contains exemplary embodiments of the hard metal according to the invention and indicates their bending strengths.
  • the flexural strength is a measure of the strength and toughness of hard metals.
  • the table also shows the composition and bending strength of corresponding WC-Co hard metals.
  • the comparison of the bending strengths shows the excellent properties of the hard metal according to the invention.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Conductive Materials (AREA)
EP86102983A 1985-03-28 1986-03-06 Hartmetall und Verfahren zu seiner Herstellung Expired - Lifetime EP0195965B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86102983T ATE56483T1 (de) 1985-03-28 1986-03-06 Hartmetall und verfahren zu seiner herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853511220 DE3511220A1 (de) 1985-03-28 1985-03-28 Hartmetall und verfahren zu seiner herstellung
DE3511220 1985-03-28

Publications (3)

Publication Number Publication Date
EP0195965A2 EP0195965A2 (de) 1986-10-01
EP0195965A3 EP0195965A3 (en) 1988-09-21
EP0195965B1 true EP0195965B1 (de) 1990-09-12

Family

ID=6266548

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102983A Expired - Lifetime EP0195965B1 (de) 1985-03-28 1986-03-06 Hartmetall und Verfahren zu seiner Herstellung

Country Status (5)

Country Link
US (1) US4684405A (enrdf_load_stackoverflow)
EP (1) EP0195965B1 (enrdf_load_stackoverflow)
JP (1) JPS61227147A (enrdf_load_stackoverflow)
AT (1) ATE56483T1 (enrdf_load_stackoverflow)
DE (1) DE3511220A1 (enrdf_load_stackoverflow)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS648245A (en) * 1987-06-30 1989-01-12 Sumitomo Electric Industries Hard alloy
JPH01156438A (ja) * 1987-12-11 1989-06-20 Mitsubishi Metal Corp 切削工具用炭化タングステン基超硬合金の製造法
JP2512973B2 (ja) * 1987-12-14 1996-07-03 三菱マテリアル株式会社 切削工具用炭化タングステン基超硬合金の製造法
DE3837006C3 (de) * 1988-10-31 1993-11-18 Krupp Widia Gmbh Hartmetall
US4963183A (en) * 1989-03-03 1990-10-16 Gte Valenite Corporation Corrosion resistant cemented carbide
SE9100227D0 (sv) * 1991-01-25 1991-01-25 Sandvik Ab Corrosion resistant cemented carbide
US5925197A (en) * 1992-01-24 1999-07-20 Sandvik Ab Hard alloys for tools in the wood industry
US5338506A (en) * 1992-12-21 1994-08-16 Valenite Inc. Process for making non-magnetic nickel tungsten carbide cemented carbide compositions and articles made from the same
DE4340652C2 (de) * 1993-11-30 2003-10-16 Widia Gmbh Verbundwerkstoff und Verfahren zu seiner Herstellung
DE29511247U1 (de) * 1995-07-12 1996-08-14 EMTEC Magnetics GmbH, 67059 Ludwigshafen Kobalt-Bindemetall-Legierung für Hartmetall-Legierungen für Hartmetall-Werkzeuge, insbesondere Schneidwerkzeuge, und Hartmetall-Werkzeuge damit
US5816090A (en) * 1995-12-11 1998-10-06 Ametek Specialty Metal Products Division Method for pneumatic isostatic processing of a workpiece
DE69739311D1 (de) 1996-12-16 2009-04-30 Sumitomo Electric Industries Sinterkarbid, verfahren zu dessen herstellung und sinterkarbidwerkzeuge
US5885379A (en) * 1997-03-28 1999-03-23 The Landover Company Tempered powdered metallurgical construct and method
SE511212C2 (sv) 1997-12-22 1999-08-23 Sandvik Ab Kula för kulspetspennor och användning av denna för kulspetspennor med vattenbaserat bläck
US6173798B1 (en) * 1999-02-23 2001-01-16 Kennametal Inc. Tungsten carbide nickel- chromium alloy hard member and tools using the same
RU2181643C2 (ru) * 2000-04-17 2002-04-27 Научно-исследовательский институт механики Московского государственного университета им. М.В. Ломоносова Способ упрочнения изделий из карбидсодержащих сплавов
DE10104736A1 (de) * 2001-02-02 2002-08-08 Boart Hwf Gmbh Co Kg Erdbearbeitungswerkzeug mit einem Arbeitselement aus Hartmetall
RU2203340C2 (ru) * 2001-06-26 2003-04-27 Закрытое акционерное общество "Дальневосточная технология" Способ получения твердосплавного композиционного материала
TWI291458B (en) * 2001-10-12 2007-12-21 Phild Co Ltd Method and device for producing titanium-containing high performance water
ATE517708T1 (de) * 2001-12-05 2011-08-15 Baker Hughes Inc Konsolidiertes hartmaterial und anwendungen
SE526194C2 (sv) * 2003-08-27 2005-07-26 Seco Tools Ab Metod för att tillverka en sintrad kropp
SE526575C2 (sv) * 2003-08-27 2005-10-11 Seco Tools Ab Metod att tillverka en sintrad kropp
US7682557B2 (en) * 2006-12-15 2010-03-23 Smith International, Inc. Multiple processes of high pressures and temperatures for sintered bodies
RU2368461C9 (ru) * 2007-12-20 2010-02-20 Открытое акционерное общество "ВНИИИНСТРУМЕНТ" Способ получения изделий из твердых сплавов
US20100104874A1 (en) * 2008-10-29 2010-04-29 Smith International, Inc. High pressure sintering with carbon additives
US8602133B2 (en) 2010-06-03 2013-12-10 Dennis Tool Company Tool with welded cemented metal carbide inserts welded to steel and/or cemented metal carbide
US8342486B2 (en) 2010-08-09 2013-01-01 Robert S Smith Durable steam injector device
KR20140081149A (ko) * 2012-12-21 2014-07-01 한국기계연구원 탄소나노튜브를 포함하는 초경합금의 제조방법, 이에 의해 제조된 초경합금 및 초경합금을 포함하여 이루어지는 초경 절삭공구
CH707503A2 (fr) * 2013-01-17 2014-07-31 Omega Sa Axe de pivotement pour mouvement horloger.
US10940538B2 (en) 2017-08-11 2021-03-09 Kennametal Inc. Grade powders and sintered cemented carbide compositions
KR102738187B1 (ko) * 2018-11-01 2024-12-03 스미토모덴키고교가부시키가이샤 초경합금, 절삭 공구 및 초경합금의 제조 방법

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB516734A (en) * 1937-07-21 1940-01-10 Fay Henry Willey Wear resistant metal alloy
AT217818B (de) * 1959-04-18 1961-10-25 Boehler & Co Ag Geb Verfahren zur Herstellung von harten und verschleißfesten Oberflächen durch Auftragsschweißung
US3215510A (en) * 1963-10-02 1965-11-02 Gen Electric Alloy
US3562371A (en) * 1968-10-16 1971-02-09 Corning Glass Works High temperature gas isostatic pressing of crystalline bodies having impermeable surfaces
SE333437B (enrdf_load_stackoverflow) * 1969-03-03 1971-03-15 Asea Ab
BE793069A (nl) * 1971-12-22 1973-06-20 Philips Nv Isostatisch heetpersprocede voor het vervaardigen van dichte sinterlichamen
AT314212B (de) * 1972-04-04 1974-03-25 Plansee Metallwerk Verfahren zum Sintern von Legierungen mit flüssiger Phase
US3964878A (en) * 1973-06-06 1976-06-22 Gte Sylvania Incorporated Cemented carbide employing a refractory metal binder and process for producing same
US3918138A (en) * 1973-06-20 1975-11-11 Kennametal Inc Metallurgical composition embodying hard metal carbides, and method of making
US4024902A (en) * 1975-05-16 1977-05-24 Baum Charles S Method of forming metal tungsten carbide composites
US4146080A (en) * 1976-03-18 1979-03-27 Permanence Corporation Composite materials containing refractory metallic carbides and method of forming the same
DE2717842C2 (de) * 1977-04-22 1983-09-01 Fried. Krupp Gmbh, 4300 Essen Verfahren zur Oberflächenbehandlung von gesinterten Hartmetallkörpern
SE420844B (sv) * 1979-05-17 1981-11-02 Sandvik Ab Sintrad hardmetall av nickelbaserad bindemetall och volframkarbid
EP0062311B1 (en) * 1981-04-06 1985-07-17 Mitsubishi Materials Corporation Tungsten carbide-base hard alloy for hot-working apparatus members
JPS5935974A (ja) * 1982-08-24 1984-02-27 Mitsubishi Pencil Co Ltd ノ−トブツク等の紙面の印刷方法

Also Published As

Publication number Publication date
JPS61227147A (ja) 1986-10-09
EP0195965A3 (en) 1988-09-21
DE3511220C2 (enrdf_load_stackoverflow) 1989-09-07
ATE56483T1 (de) 1990-09-15
EP0195965A2 (de) 1986-10-01
DE3511220A1 (de) 1986-10-09
US4684405A (en) 1987-08-04

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