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EP1230410A1 - Outil en carbure metallique destine au travail du bois - Google Patents

Outil en carbure metallique destine au travail du bois

Info

Publication number
EP1230410A1
EP1230410A1 EP00975107A EP00975107A EP1230410A1 EP 1230410 A1 EP1230410 A1 EP 1230410A1 EP 00975107 A EP00975107 A EP 00975107A EP 00975107 A EP00975107 A EP 00975107A EP 1230410 A1 EP1230410 A1 EP 1230410A1
Authority
EP
European Patent Office
Prior art keywords
cemented carbide
binder phase
max
woodworking
grain size
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.)
Withdrawn
Application number
EP00975107A
Other languages
German (de)
English (en)
Inventor
Peter Lorentezen
Knud Rasmussen
Peter Fuller
Christian Daugaard
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.)
Sandvik AB
Original Assignee
Sandvik AB
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 Sandvik AB filed Critical Sandvik AB
Publication of EP1230410A1 publication Critical patent/EP1230410A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
    • 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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • the present invention relates to a cemented carbide with excellent properties for use as tool for woodworking. More particularly, the invention relates to a sintered, very fine-grained cemented carbide material in which a corrosion and oxidation resistant phase has been distributed in a monophase binder based on nickel and cobalt and of one or more of the following metals : chromium, molybdenum, iron and vanadium. Most particularly, the binder is based on nickel and/or cobalt powders made by the polyol process .
  • Cemented carbide is usually manufactured by blending the WC, Ni, Co and other powderous sources and an organic binder (typically wax-based) and mixing these in a ball mill before spray-drying the slurry into a flowable ready-to-press powder.
  • organic binder typically wax-based
  • most of the powder sources of Ni and Co are made from calcinated oxalates or hydroxides subsequently reduced in a hydrogen atmosphere. These powders usually have a broad particle size distribution and strongly agglomerated particles . The particles are difficult to deagglomerate, even by ball milling. This may lead to Co-lakes and a heterogeneous cemented carbide microstructure resulting in varying physical and chemical properties.
  • Polyol cobalt and nickel powders made according to US patent no.4,539,041 contain predominately near- spherical grains with little agglomeration and a submicron average particle size.
  • the use of polyol powders as binders in cemented carbides is described in US patent 5,441,693.
  • polyol powder sources By using polyol powder sources the microstructure becomes more homogeneous through better dispersion of the binder phase particles. Thereby fewer binder phase-lakes are present after sintering and further the sintering temperature may be decreased.
  • Cemented carbide is one of the most common materials currently being used in the wood industry for woodworking tools. In the quest for extended lifetime of the woodworking tools and for cutting quality it is important to optimise specific properties of the cutting tool material. Two of the most important properties of the woodworking tool are the resistance to corrosion and oxidation and the hardness .
  • Solid wood contains organic acids and other compounds that degrade the binder in the tool material and cause outbreak of the hard WC-particle from the matrix and thus wear the tool material .
  • Man-made wood products contain organic binder material, based on compounds such as urea, formaldehyde, wax, glue fillers etc. and possibly laminated with plastic layers, such as melamine .
  • the temperature may get very high (>500°C) when working these wood products and then the content of the product will degrade into corrosive compounds chemically attacking the cemented carbide binder. Furthermore the high temperature may result in oxidation of the cemented carbide binder, also degrading and wearing the cutting edge.
  • the hardness usually should be as high as possible in order to retain a sharp and wear resistant cutting edge.
  • the factors determining the hardness are predominately grain size and binder content. The lower the grain size and/or the binder content the higher hardness usually will be.
  • the invention is primarily concerned with the use of near-spherical, submicron nickel and/or cobalt powders manufactured by the polyol process in cemented carbide grades particularly for woodworking having a corrosion and oxidation resistant monophase binder phase.
  • the said polyol Ni- and Co-powders shall be produced separately by the polyol process, preferably as a mixture of Ni and Co by the polyol process .
  • the total content of said binder phase varies between 0.5 and 30 wt%, preferably between 1 and 10 wt%, most preferably between 1.5 and 5 wt%, the remainder being tungsten carbide.
  • the composition of said binder phase shall be 30 to 80 wt% Co, max 5 wt% Mo, max 15 wt% Cr, max 10 wt% V, max 20 wt% Fe, balance Ni .
  • the average sintered WC grain size shall be less than 0.7 ⁇ m, preferably less than 0.5 ⁇ m, most preferably less than 0.3 ⁇ m.
  • the cemented carbide consists of 2.3 wt% Co, 0.9 wt% Ni and 0.3 wt% Cr, the rest being tungsten carbide.
  • the average sintered WC grain size is ⁇ 0.5 ⁇ m, preferably ⁇ 0.3 ⁇ m.
  • the invention also relates to the use of a cemented carbide with very fine sintered grain size and with a binder phase containing Ni and Co produced by the polyol process as a tool, such as saw tips or indexable inserts, for cutting and machining of wood and wood- based products, particularly chipboard, particle boards and medium or high density fibre boards (MDF/HDF) .
  • the present invention further relates to a method of making a cemented carbide body based on tungsten carbide and a binder phase based on Ni and Co and any of the following constituents: Mo, Cr, Fe and V, by powder metallurgical methods by milling, pressing and sintering of powders forming hard constituents and binder phase whereby said binder phase contains Ni and/or Co made by the polyol process.
  • sintering is performed gas pressure sintering also referred to a sinter-HIP.
  • Both grades were manufactured by conventional cemented carbide techniques .
  • Co and Ni-powders were made by reduction of Co-and Ni- oxalate; in the invention powder Co and Ni-powders were made from Co-and Ni-hydroxide thermally reduced in polyol thus obtaining powders with a submicron average particle size.
  • the test comprised machining particleboard plates with a top cutter containing three identical indexable inserts. The cutting speed was 18000 rpm, feed rate lm/min and cutting depth 2 mm.

Landscapes

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

Abstract

La présente invention concerne un carbure métallique aux propriétés excellentes destiné à des outils de travail du bois. A cet effet, on utilise une poudre WC aux grains extrêmement fins et des poudres de cobalt et/ou nickel obtenues selon le processus polyol. Ce carbure métallique est particulièrement utile pour l'usinage de panneaux agglomérés, de panneaux de particules et de panneaux de fibres moyenne et haute densité (MDF/HDF).
EP00975107A 1999-10-28 2000-10-26 Outil en carbure metallique destine au travail du bois Withdrawn EP1230410A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9903898 1999-10-28
SE9903898A SE9903898D0 (sv) 1999-10-28 1999-10-28 Cemented carbide tool for wood working
PCT/SE2000/002085 WO2001031075A1 (fr) 1999-10-28 2000-10-26 Outil en carbure metallique destine au travail du bois

Publications (1)

Publication Number Publication Date
EP1230410A1 true EP1230410A1 (fr) 2002-08-14

Family

ID=20417523

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00975107A Withdrawn EP1230410A1 (fr) 1999-10-28 2000-10-26 Outil en carbure metallique destine au travail du bois

Country Status (5)

Country Link
EP (1) EP1230410A1 (fr)
JP (1) JP2003512535A (fr)
CA (1) CA2386860A1 (fr)
SE (1) SE9903898D0 (fr)
WO (1) WO2001031075A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6844236B2 (en) * 2001-07-23 2005-01-18 Agere Systems Inc. Method and structure for DC and RF shielding of integrated circuits
PL2604714T3 (pl) * 2008-12-18 2018-02-28 Sandvik Intellectual Property Ab Nóż z ostrzem obrotowym
US8834786B2 (en) 2010-06-30 2014-09-16 Kennametal Inc. Carbide pellets for wear resistant applications
MX2018015840A (es) * 2016-06-23 2019-05-27 Sandvik Hyperion AB Herramienta de linea de proceso de carburo cementado resistente al desgaste y corrosion.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2537898A1 (fr) * 1982-12-21 1984-06-22 Univ Paris Procede de reduction de composes metalliques par les polyols, et poudres metalliques obtenues par ce procede
SE9100227D0 (sv) * 1991-01-25 1991-01-25 Sandvik Ab Corrosion resistant cemented carbide
JPH06506502A (ja) * 1991-04-10 1994-07-21 サンドビック　アクティエボラーグ セメンテッドカーバイド物品の製造方法
SE512754C2 (sv) * 1997-09-05 2000-05-08 Sandvik Ab Sätt att tillverka ultrafina WC-Co-legeringar

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0131075A1 *

Also Published As

Publication number Publication date
CA2386860A1 (fr) 2001-05-03
WO2001031075A1 (fr) 2001-05-03
JP2003512535A (ja) 2003-04-02
SE9903898D0 (sv) 1999-10-28

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