EP1488020A1 - Hard metal or cermet cutting material and the use thereof - Google Patents

Hard metal or cermet cutting material and the use thereof

Info

Publication number
EP1488020A1
EP1488020A1 EP03722231A EP03722231A EP1488020A1 EP 1488020 A1 EP1488020 A1 EP 1488020A1 EP 03722231 A EP03722231 A EP 03722231A EP 03722231 A EP03722231 A EP 03722231A EP 1488020 A1 EP1488020 A1 EP 1488020A1
Authority
EP
European Patent Office
Prior art keywords
cutting material
mass
weight
binder phase
binder
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.)
Granted
Application number
EP03722231A
Other languages
German (de)
French (fr)
Other versions
EP1488020B1 (en
Inventor
Hans Werner Daub
Klaus Dreyer
Dieter Kassel
Walter Lengauer
Klaus RÖDIGER
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.)
Widia GmbH
Original Assignee
Widia GmbH
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 Widia GmbH filed Critical Widia GmbH
Publication of EP1488020A1 publication Critical patent/EP1488020A1/en
Application granted granted Critical
Publication of EP1488020B1 publication Critical patent/EP1488020B1/en
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
    • C22C29/005—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides 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
    • 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

Definitions

  • the invention relates to a hard metal or cermet cutting material for machining chrome-containing metal workpieces, such as e.g. Austenites, Ni-based alloys, stones or steels, with a hard material phase containing carbides, nitrides and / or carbonitrides and a 3 to 25 mass% binder phase made of iron, cobalt and nickel.
  • chrome-containing metal workpieces such as e.g. Austenites, Ni-based alloys, stones or steels
  • a hard material phase containing carbides, nitrides and / or carbonitrides and a 3 to 25 mass% binder phase made of iron, cobalt and nickel.
  • the invention further relates to a use of the hard metal or cermet cutting material for machining metal workpieces.
  • the binder In hard metals such as cermets, the binder is used to form a liquid phase at sintering temperature, which is in equilibrium with the hard material phase and can wet it.
  • the liquid binding phase is said to have considerable solubility for the hard material phase with the sintering temperature, but is said to be eliminated again on cooling. Reactions of the binder phase with the hard material phase, which lead to the consumption or degradation of the binder phase, should be avoided as far as possible.
  • the binder phase should have mechanical properties which correspond to the intended use and the temperatures prevailing here in such a way that the binder leads to the hardest and toughest cohesion of the hard metal or cermet body.
  • the hard metal or cermet cutting material has a binder phase with 10 mass% to 75 mass% Co, 10 mass% to 75 mass% Ni, 5 mass% to 30 mass% Cr,> 20 mass% to 60 mass% Fe, where the sum of the metals Co, Ni, Cr and Fe does not exceed 100%.
  • the binder phase can additionally contain up to 5% by mass of V, Mo and / or Al, up to the solubility limit Ti, W, Ta / Nb, Zr and / or Hf and up to 15% by mass of Mn. Oxygen, nitrogen and / or boron can furthermore be present in the binder to the maximum solubility.
  • the carbon content in the cutting material is adjusted so that there is no ⁇ and no C porosity.
  • the binder phase preferably has no hexagonal components.
  • the hard metal or cermet body is based on the inventive core idea that there is no difference or only the smallest possible difference in the concentrations of the lying components between workpiece and tool between the metal to be machined and the cutting material. This is intended to minimize interdiffusion of the cobalt from the hard metal or cermet cutting material on the one hand and the alloy elements of the steel on the other hand during machining.
  • the binding phase of the cutting material must also contain chromium in addition to iron, nickel and cobalt, whereby good wettability of nickel and cobalt is the reason for the minimum 10 and maximum 75% content in the binder phase.
  • the rest iron and nickel with at least 4% by weight, but not more than 36% by weight nickel or iron , the ratio Ni / Fe should be between 1.5: 1 to 1: 1.5 is inevitably contained in the binder in the present material for machining Cr.
  • an fcc structure is formed in the binder described.
  • the tendency of the cutting material to stick can only be avoided if there is significant Cr content in the binder.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Scissors And Nippers (AREA)
  • Powder Metallurgy (AREA)

Abstract

The invention relates to a hard metal or cermet cutting material for cutting chromium-alloy steel parts. Said cutting material comprises a hard phase containing carbides, nitrides and/or carbonitrides and a binder phase based on iron, cobalt and nickel. The aim of the invention is to prevent an agglomeration of the cutting material during cutting operations. For this purpose, the binder phase contains 10% by weight to 75% by weight of Co, 10% by weight to 75% by weight of Ni, 5% by weight to 30% by weight of Cr, >=20% by weight to 60% by weight of Fe, the total of Co, Ni, Cr and Fe not exceeding 100% by weight.

Description

Beschreibung description
Hartmetall- oder Cermet-Schneidwerkstoff sowie dessen VerwendungTungsten carbide or cermet cutting material and its use
Die Erfindung betrifft einen Hartmetall- oder Cermet-Schneidwerkstoff zum Zerspanen von Chrom-haltigen Metallwerkstücken, wie z.B. Austeniten, Ni-Basislegierun- gen, Steinten oder Stählen, mit einer Carbide, Nitride und/oder Carbonitride enthaltenden Hartstoffphase und einer 3 bis 25 Massen%igen Binderphase aus Eisen, Cobalt und Nickel.The invention relates to a hard metal or cermet cutting material for machining chrome-containing metal workpieces, such as e.g. Austenites, Ni-based alloys, stones or steels, with a hard material phase containing carbides, nitrides and / or carbonitrides and a 3 to 25 mass% binder phase made of iron, cobalt and nickel.
Die Erfindung betrifft ferner eine Verwendung des Hartmetall- oder Cermet- Schneidwerkstoffes zur zerspanenden Bearbeitung von Metallwerkstücken.The invention further relates to a use of the hard metal or cermet cutting material for machining metal workpieces.
In Hartmetallen wie in Cermets dient der Binder dazu, bei Sintertemperatur eine flüssige Phase zu bilden, die im Gleichgewicht mit der Hartstoffphase bestehen und diese benetzen kann. Die flüssige Bindephase soll eine beachtliche Löslichkeit für die Hartstoffphase mit der Sintertemperatur haben, soll dieselbe jedoch beim Abkühlen wieder ausscheiden. Reaktionen der Bindephase mit der Hartstoffphase, die zur Aufzehrung bzw. zum Abbau der Binderphase führen, sollen möglichst unterbleiben. Weiterhin soll die Binderphase mechanische Eigenschaften besitzen, die dem Einsatzzweck und den hierbei herrschenden Temperaturen derart entsprechen, dass der Binder für einen möglichst harten und zähen Zusammenhalt des Hartmetalloder Cermetkörpers führt.In hard metals such as cermets, the binder is used to form a liquid phase at sintering temperature, which is in equilibrium with the hard material phase and can wet it. The liquid binding phase is said to have considerable solubility for the hard material phase with the sintering temperature, but is said to be eliminated again on cooling. Reactions of the binder phase with the hard material phase, which lead to the consumption or degradation of the binder phase, should be avoided as far as possible. Furthermore, the binder phase should have mechanical properties which correspond to the intended use and the temperatures prevailing here in such a way that the binder leads to the hardest and toughest cohesion of the hard metal or cermet body.
Es ist auch bereits bekannt, dass zur Erhöhung der Korrosionsfestigkeit von Hartmetallen Cr3C2 mit ca. 8 bis 18 % Nickel als Binder dienen können.It is also already known that Cr 3 C 2 with approximately 8 to 18% nickel can serve as a binder to increase the corrosion resistance of hard metals.
Bei Zerspanungsoperationen wie dem Drehen, Fräsen oder Bohren von Stahlsorten, insbesondere austenitischen Stählen, ist häufig ein Verkleben des Hartmetall- oder Cermet-Schneidwerkstoffes mit dem Stahlwerkstück festzustellen, was wegen dem daraus resultierenden erhöhten Verschleiß des Schneidwerkzeuges sowie der schlechten Bearbeitungsqualität am Werkstück unerwünscht ist. Es ist Aufgabe der vorliegenden Erfindung, einen Schneidwerkstoff und ein Verfahren anzugeben, mit denen dieser Nachteil behoben wird.During machining operations such as turning, milling or drilling steel types, especially austenitic steels, the carbide or cermet cutting material often sticks to the steel workpiece, which is undesirable due to the resulting increased wear on the cutting tool and the poor machining quality on the workpiece. It is an object of the present invention to provide a cutting material and a method with which this disadvantage is eliminated.
Erfindungsgemäß besitzt der Hartmetall- oder Cermet-Schneidwerkstoff eine Binderphase mit 10 Massen% bis 75 Massen% Co, 10 Massen% bis 75 Massen% Ni, 5 Massen% bis 30 Massen% Cr, > 20 Massen% bis 60 Massen% Fe, wobei die Summe der Metalle Co, Ni, Cr und Fe 100 % nicht übersteigt.According to the hard metal or cermet cutting material has a binder phase with 10 mass% to 75 mass% Co, 10 mass% to 75 mass% Ni, 5 mass% to 30 mass% Cr,> 20 mass% to 60 mass% Fe, where the sum of the metals Co, Ni, Cr and Fe does not exceed 100%.
Weiterbildungen dieses Schneidwerkstoffes sind in den Ansprüchen 2 bis 5 beschrieben.Developments of this cutting material are described in claims 2 to 5.
So kann die Binderphase zusätzlich bis zu jeweils 5 Massen% V, Mo und/oder AI, bis zur Löslichkeitsgrenze Ti, W, Ta/Nb, Zr und/oder Hf sowie bis zu 15 Massen% Mn enthalten. Weiterhin können im Binder Sauerstoff, Stickstoff und/oder Bor bis zur maximalen Löslichkeit enthalten sein. Der Gehalt an Kohlenstoff im Schneidwerkstoff ist so eingestellt, dass keine η- und keine C-Porosität vorliegen. Vorzugsweise besitzt die Binderphase keine hexagonalen Anteile.The binder phase can additionally contain up to 5% by mass of V, Mo and / or Al, up to the solubility limit Ti, W, Ta / Nb, Zr and / or Hf and up to 15% by mass of Mn. Oxygen, nitrogen and / or boron can furthermore be present in the binder to the maximum solubility. The carbon content in the cutting material is adjusted so that there is no η and no C porosity. The binder phase preferably has no hexagonal components.
Grundsätzlich liegt dem Hartmetall- oder Cermetkörper der erfinderische Kerngedanke zugrunde, dass zwischen dem zu bearbeitenden Metall und dem Schneidwerkstoff bezüglich des Cr-Gehaltes keine oder nur eine möglichst geringe Differenz in den Konzentrationen der Liegerungsbestandteile zwischen Werkstück und Werkzeug vorliegt. Hiermit soll eine Interdiffusion des Cobalts aus dem Hartmetalloder Cermet-Schneidwerkstoff einerseits und den Legierungselementen des Stahles andererseits beim Zerspanen minimiert werden. Zu diesem Zweck muss die Bindephase des Schneidwerkstoffes neben Eisen, Nickel und Cobalt auch Chrom enthalten, wobei eine gute Benetzbarkeit von Nickel und Cobalt Ursache für den mindestens 10 und maximal 75 %igen Gehalt in der Binderphase ist. Anders als bei dem aus der WO 99/10549 bekannten Co-Ni-Fe-Binder mit 40 bis 90 Gew.% Cobalt, Rest Eisen und Nickel mit wenigstens 4 Gew.%, aber nicht mehr als 36 Gew.% Nickel bzw. Eisen, wobei das Verhältnis Ni/Fe zwischen 1 ,5 : 1 bis 1 : 1 ,5 liegen soll, ist bei dem vorliegenden Werkstoff zum Zerspanen Cr zwingend im Binder enthalten. Anders als eine Cobalt-Binderphase mit einer hexagonalen Struktur, bildet sich bei dem beschriebenen Binder eine fcc-Struktur aus. Allerdings kann die Klebneigung des Schneidwerkstoffes nur bei signifikanten Cr-Gehalten im Binder vermieden werden.Basically, the hard metal or cermet body is based on the inventive core idea that there is no difference or only the smallest possible difference in the concentrations of the lying components between workpiece and tool between the metal to be machined and the cutting material. This is intended to minimize interdiffusion of the cobalt from the hard metal or cermet cutting material on the one hand and the alloy elements of the steel on the other hand during machining. For this purpose, the binding phase of the cutting material must also contain chromium in addition to iron, nickel and cobalt, whereby good wettability of nickel and cobalt is the reason for the minimum 10 and maximum 75% content in the binder phase. In contrast to the Co-Ni-Fe binder known from WO 99/10549 with 40 to 90% by weight cobalt, the rest iron and nickel with at least 4% by weight, but not more than 36% by weight nickel or iron , the ratio Ni / Fe should be between 1.5: 1 to 1: 1.5 is inevitably contained in the binder in the present material for machining Cr. Unlike a cobalt binder phase with a hexagonal structure, an fcc structure is formed in the binder described. However, the tendency of the cutting material to stick can only be avoided if there is significant Cr content in the binder.
Obwohl die Mechanismen der Reaktionen und Wechselwirkungen zwischen den im Stahl enthaltenen Metallen und Kohlenstoff sehr komplex sind, hat sich überraschenderweise beim Zerspanen von Cr-haltigen Metallwerkstücken mittels eines Schneidwerkstoffes gezeigt, dass optimale Ergebnisse dann erzielt werden konnten, wenn der Cr-Anteil in der Binderphase des Schneidwerkstoffes dem Cr-Anteil in dem Werkstückstoff annähernd gleich ist. Although the mechanisms of the reactions and interactions between the metals and carbon contained in the steel are very complex, surprisingly, when cutting metal workpieces containing Cr using a cutting material, it has been shown that optimal results can be achieved if the Cr content is in the binder phase of the cutting material is approximately equal to the Cr content in the workpiece material.

Claims

Patentansprüche claims
1. Hartmetall- oder Cermet-Schneidwerkstoff zum Zerspanen von Chrom-legierten Stahlwerkstücken, mit einer Carbide, Nitride und/oder Carbonitride enthaltenden Hartstoffphase und einer Binderphase aus Eisen, Cobalt und Nickel, d a d u r c h g e k e n n z e i c h n e t, dass die Binderphase 10 Massen% bis 75 Massen% Co, 10 Massen% bis1. Tungsten carbide or cermet cutting material for machining chrome alloy steel workpieces, with a carbide, nitride and / or carbonitride containing hard material phase and a binder phase made of iron, cobalt and nickel, characterized in that the binder phase 10 mass% to 75 mass% Co , 10 mass% to
75 Massen% Ni, 5 Massen% bis 30 Massen% Cr, > 20 Massen% bis75% by mass Ni, 5% by mass to 30% by mass Cr,> 20% by mass to
60 Massen% Fe enthält, wobei die Summe an Co, Ni, Cr und Fe60 mass% contains Fe, the sum of Co, Ni, Cr and Fe
100 Massen% nicht übersteigt.Does not exceed 100 mass%.
2. Hartmetall- oder Cermet-Schneidwerkstoff nach Anspruch 1 , dadurch gekennzeichnet, dass die Binderphase zusätzlich bis zu jeweils 5 Massen% V, Mo und/oder AI, bis zur maximalen Löslichkeit Ti, W, Ta/Nb und/oder bis zu2. Tungsten carbide or cermet cutting material according to claim 1, characterized in that the binder phase additionally up to 5% by mass V, Mo and / or Al, up to the maximum solubility Ti, W, Ta / Nb and / or up to
15 Massen% Mn enthält.Contains 15 mass% Mn.
3. Hartmetall- oder Cermet-Schneidwerkstoff nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass im Binder O, N und/oder B bis zur maximalen Löslichkeit enthalten sind.3. Tungsten carbide or cermet cutting material according to claim 1 or 2, characterized in that the binder contains O, N and / or B to the maximum solubility.
4. Hartmetall- oder Cermet-Schneidwerkstoff nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der C-Gehalt im Schneidwerkstoff so eingestellt sind, dass keine η-Phase und keine C-Porosität vorliegen.4. Hard metal or cermet cutting material according to one of claims 1 to 3, characterized in that the C content in the cutting material is set such that there is no η phase and no C porosity.
5. Hartmetall- oder Cermet-Schneidwerkstoff nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Binderphase keine.hexagonalen Anteile besitzt.5. Hard metal or cermet cutting material according to one of claims 1 to 4, characterized in that the binder phase has no hexagonal components.
6. Verwendung des Hartmetall- oder Cermet-Schneidwerkstoffes nach einem der Ansprüche 1 bis 5 zur zerspanenden Bearbeitung von Stahlwerkstücken, vorzugsweise von Werkstücken aus Cr-haltigen Legierungen. Verwendung eines Schneidwerkstoffes nach einem der Ansprüche 1 bis 5 zur zerspanenden Bearbeitung von chromhaltigen Metallwerkstücken, dadurch gekennzeichnet, dass der Chrom-Anteil in der Binderphase des Schneidwerkstoffes nicht größer ist als der Chrom-Anteil in der Stahllegierung des Werkstückes. 6. Use of the hard metal or cermet cutting material according to one of claims 1 to 5 for machining steel workpieces, preferably workpieces made of Cr-containing alloys. Use of a cutting material according to one of claims 1 to 5 for machining chrome-containing metal workpieces, characterized in that the chromium content in the binder phase of the cutting material is not greater than the chromium content in the steel alloy of the workpiece.
EP03722231A 2002-03-28 2003-03-21 Hard metal or cermet cutting material and the use thereof Expired - Lifetime EP1488020B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10213963 2002-03-28
DE10213963A DE10213963A1 (en) 2002-03-28 2002-03-28 Tungsten carbide or cermet cutting material and method for machining Cr-containing metal workpieces
PCT/DE2003/000946 WO2003083149A1 (en) 2002-03-28 2003-03-21 Hard metal or cermet cutting material and the use thereof

Publications (2)

Publication Number Publication Date
EP1488020A1 true EP1488020A1 (en) 2004-12-22
EP1488020B1 EP1488020B1 (en) 2006-08-02

Family

ID=27816033

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03722231A Expired - Lifetime EP1488020B1 (en) 2002-03-28 2003-03-21 Hard metal or cermet cutting material and the use thereof

Country Status (7)

Country Link
US (1) US20050115742A1 (en)
EP (1) EP1488020B1 (en)
JP (1) JP2005521790A (en)
AT (1) ATE335093T1 (en)
DE (2) DE10213963A1 (en)
ES (1) ES2270016T3 (en)
WO (1) WO2003083149A1 (en)

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AT8346U1 (en) 2005-04-29 2006-06-15 Ceratitzit Austria Ges M B H COATED TOOL
DE102007047312A1 (en) * 2007-10-02 2009-04-09 H.C. Starck Gmbh Tool
US20120107603A1 (en) * 2010-10-29 2012-05-03 General Electric Company Article formed using nanostructured ferritic alloy
ES2628422T3 (en) 2011-05-27 2017-08-02 H.C. Starck Gmbh FeNi binder with universal applicability
JP5999362B2 (en) * 2013-03-12 2016-09-28 三菱マテリアル株式会社 Surface coated cutting tool
JP6315197B2 (en) * 2014-09-26 2018-04-25 三菱マテリアル株式会社 Composite sintered body cutting tool
WO2016104620A1 (en) * 2014-12-25 2016-06-30 三菱マテリアル株式会社 Compound sintered compact cutting tool and compound sintered compact cutting tool with coated surface
JP6614491B2 (en) * 2014-12-25 2019-12-04 三菱マテリアル株式会社 Composite sintered body cutting tool and surface-coated composite sintered body cutting tool
CN106834809A (en) * 2015-12-04 2017-06-13 南京理工大学 A kind of high-performance carbide using cobalt-base alloys as Binder Phase

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Also Published As

Publication number Publication date
ES2270016T3 (en) 2007-04-01
ATE335093T1 (en) 2006-08-15
US20050115742A1 (en) 2005-06-02
JP2005521790A (en) 2005-07-21
DE10213963A1 (en) 2003-10-09
WO2003083149A1 (en) 2003-10-09
EP1488020B1 (en) 2006-08-02
DE50304470D1 (en) 2006-09-14

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