Cermet insert and cutting tool

A technology made of cermets and ceramics, which is applied in the manufacture of tools, metal processing equipment, and cutting tools for lathes, etc., can solve the problems of insufficient research on wear resistance and defect resistance, and achieve excellent wear resistance and Effects of chipping resistance and excellent wear resistance

Inactive Publication Date: 2008-05-28
MITSUBISHI MATERIALS CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0052] However, in the technology of the above-mentioned Patent Document 2, although the strength of the alloy can be improved to a certain extent by the above-mentioned configuration of the black phase / white phase, there is a problem that studies on wear resistance and fracture resistance are insufficient. question

Method used

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  • Cermet insert and cutting tool
  • Cermet insert and cutting tool
  • Cermet insert and cutting tool

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0135] The titanium carbonitride-based cermet insert (hereinafter also referred to as cutting insert) of the present embodiment is formed of titanium carbonitride-based cermet. As the cutting insert, for example, an insert 11 having a tip shape of ISO standard CNMG120412 shown in FIG. 1 is exemplified.

[0136] The titanium carbonitride-based cermet is a sintered body of compacted powder with the following composition, which contains at least tungsten carbide in mass %: 20-30%, tantalum carbide and / or niobium carbide (hereinafter also referred to as TaC / NbC): 5-10%, Co: 5-10%, Ni: 5-10%, and titanium carbonitride: 50-60%.

[0137] When the structure is observed with a scanning electron microscope, it can be seen that the structure is as follows: a hard phase: 75 to 90 area %, and a binder phase: the balance.

[0138] As shown in the schematic diagram of FIG. 2 , the hard phase includes the following (1) to (3).

[0139] (1) The first hard phase with a core structure, the cor...

no. 2 approach

[0160] The insert made of titanium carbonitride-based cermets (hereinafter also referred to as cutting insert) according to the present embodiment is a sintered body of a green compact having a composition comprising at least tungsten carbide: 20 to 30%, tantalum carbide and / or niobium carbide (hereinafter also referred to as TaC / NbC): 5-10%, one or two of zirconium carbide, vanadium carbide and molybdenum carbide (hereinafter also referred to as ZrC / VC / Mo 2 C): 1-5%, Co: 5-10%, Ni: 5-10%, and titanium carbonitride: 50-60%. For example, the insert 21 etc. which have the tip shape of ISO standard|CNMG120412 shown in FIG. 1 are mentioned, for example.

[0161] When the structure is observed with a scanning electron microscope, it can be seen that it has the following structure: a hard phase: 75 to 90 area %, and a binder phase: the balance.

[0162] As shown in the schematic diagram of FIG. 3 , the hard phase includes the following (1) to (3).

[0163] (1) The first hard pha...

no. 3 approach

[0184] The titanium carbonitride-based cermet insert 1 of the present embodiment is a cutting insert composed of a sintered body having a shape of ISO standard: SNGN120408, as shown in FIG. 5 .

[0185] The insert 1 is formed of a titanium carbonitride-based cermet composed of a sintered body containing Ti, Ti and / or Nb (hereinafter also referred to as Ta / Nb), and W.

[0186] The composition of the sintered body of the insert 1 is shown below.

[0187] The total of the value converted from Ti to carbonitride, the value converted from Ta and / Nb to carbide, and the value converted from W to carbide is 70% as a ratio to the entire structure constituting the sintered body. ~95% by mass.

[0188] In addition, the value of W converted into carbides is 20 to 35% by mass relative to the entire structure, and the ratio of Co and Ni to the entire structure is 5 to 30% by mass.

[0189] Ti is contained in an amount of 45 to 60% by mass in terms of carbonitrides, and Ta and / or Nb is co...

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Abstract

One mode of the blade made of titanium carbonitride-based cermet is that it has a structure composed of 75-90 area % of hard phase and the balance is a binding phase. The hard phase has: the core is made of titanium carbonitride Phase composition, the peripheral part is composed of a first hard phase with a core structure composed of Ta and/or Nb, Ti, and W complex carbonitride (hereinafter expressed as (Ti, W, Ta/Nb)CN) phase; Both the core and the peripheral part are the second hard phase with a core structure composed of (Ti, W, Ta/Nb) CN phase; the third hard phase with a single-phase structure composed of TiCN phase, and the binding phase has: Co: 18-33%; Ni: 20-35%; Ta and/or Nb, and Ti, the total amount: 5% or less; W: 40-60%. Another form of the titanium carbonitride-based cermet blade is the sum of the value of Ti converted into carbonitride, the value of Ta and/or Nb converted into carbide, and the value of W converted into carbide It is 70-95% by mass, the value of W converted into carbide is 20-35% by mass, Co and Ni are 5-30% by mass, and have a structure composed of hard phase and binder phase. The hard phase has (Ti , W, Ta/Nb) CN, the binding phase is mainly composed of Co and/or Ni, and W, and 40-65% by mass of W is contained in the hard phase. This cutting tool has a holder and the cermet blade fixed by the holder.

Description

technical field [0001] The present invention relates to inserts and cutting tools made of cermets. Specifically, it relates to an insert made of titanium carbonitride-based cermet and a cutting tool having the insert made of cermet, wherein the binder phase of titanium carbonitride-based cermet (hereinafter referred to as TiCN-based cermet) has an excellent high temperature Hardness, as a result, exhibits excellent wear resistance and fracture resistance in high-speed cutting processes accompanied by high heat generation. [0002] This application claims the following priority and cites its contents: Japanese Patent Application No. 2005-173463 filed on June 14, 2005; Japanese Patent Application No. 2005-259169 filed on September 7, 2005; Japanese Patent Application No. 2005-259170 filed on September 7, Japanese Patent Application No. 2005-259171 filed on September 7, 2005, Japanese Patent Application No. 2005-303095 filed on October 18, 2005, and 2005 Japanese Patent No. 200...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B27/14C22C29/04C22C27/04
Inventor 谷内俊之福村昌史高桥慧新藤知昭小村笃史高岛启彰
Owner MITSUBISHI MATERIALS CORP
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