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Surface coating cutting tool

A cutting tool and surface coating technology, applied in the field of surface coating cutting tools, can solve the problems of poor toughness, easy to produce chipping, defect, peeling, sufficient and so on, and achieve the effect of excellent wear resistance

Active Publication Date: 2014-05-21
MITSUBISHI MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] However, the coated tool described in the above-mentioned Patent Document 1 is vapor-deposited by physical vapor deposition (Ti 1-X Al X ) The hard coating layer composed of N layers cannot increase the Al content X in the hard coating layer. Therefore, for example, when it is used for high-speed interrupted cutting of alloy steel, it cannot be said that the chipping resistance is sufficient.
[0014] On the other hand, for the (Ti 1-X Al X ) N layer, can increase the Al content X, and can form a cubic crystal structure, so a hard coating layer with predetermined hardness and excellent wear resistance can be obtained, but the adhesion strength with the substrate is not sufficient, and the toughness is relatively low. Difference
[0015] In addition, the coated tool described in the above-mentioned Patent Document 3 has a predetermined hardness and is excellent in wear resistance, but has poor toughness, so chipping, chipping, and peeling are likely to occur when used for high-speed interrupted cutting of alloy steel, etc. Abnormal damage, etc., cannot be said to exhibit satisfactory cutting performance

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0085] As raw material powders, WC powder, TiC powder, ZrC powder, TaC powder, NbC powder, Cr 3 C 2 Co powder and Co powder, these raw material powders are compounded into the compounding composition shown in Table 1, and paraffin wax is further added, ball milled and mixed in acetone for 24 hours, and dried under reduced pressure, then stamped into a green compact of a predetermined shape with a pressure of 98 MPa. The compact is vacuum sintered in a vacuum of 5Pa at a predetermined temperature in the range of 1370-1470°C for 1 hour. After sintering, WC-based cemented carbides with blade shapes specified in ISO·SEEN1203AFSN are produced. Prepare substrates A-D.

[0086] In addition, TiCN (TiC / TiN=50 / 50 in mass ratio) powder, Mo 2 C powder, ZrC powder, NbC powder, TaC powder, WC powder, Co powder, and Ni powder. These raw material powders are blended into the compounding composition shown in Table 2, wet-mixed with a ball mill for 24 hours, dried, and stamped with a pressure...

Embodiment 2

[0143] As raw material powders, WC powder, TiC powder, ZrC powder, VC powder, TaC powder, NbC powder, Cr 3 C 2 powder, TiN powder and Co powder, and these raw material powders are combined into the compound composition shown in Table 10, and paraffin wax is further added, mixed in acetone for 24 hours, dried under reduced pressure, and pressed into a predetermined shape with a pressure of 98MPa. The compact is vacuum sintered in a vacuum of 5Pa at a predetermined temperature in the range of 1370-1470°C for 1 hour. After sintering, the cutting edge is ground by R: 0.07mm Tool substrates a to ε made of WC-based cemented carbide having an insert shape according to ISO standard CNMG120412 were manufactured by processing.

[0144] In addition, TiCN (TiC / TiN=50 / 50 in mass ratio) powder, Mo 2 C powder, ZrC powder, NbC powder, TaC powder, WC powder, Co powder, and Ni powder. These raw material powders are blended into the compounding composition shown in Table 11, and wet mixed with...

Embodiment 3

[0184] As raw material powders, cBN powder, TiN powder, TiCN powder, TiC powder, Al powder, and Al 2 o 3Powder, these raw material powders were compounded into the compounding composition shown in Table 16, wet-mixed with a ball mill for 80 hours and dried, then press-molded with a pressure of 120MPa to form a green compact with a size of diameter: 50mm×thickness: 1.5mm, and then , the compact is sintered in a vacuum atmosphere at a pressure of 1 Pa, and kept at a predetermined temperature in the range of 900 to 1300°C for 60 minutes to be sintered as a pre-sintered body for cutting blades. The pre-sintered body is combined with another Prepared WC-based cemented carbide support sheets with dimensions of Co: 8% by mass, WC: remaining composition and diameter: 50mm×thickness: 2mm were stacked, loaded into an ordinary ultra-high pressure sintering device, and The conditions are pressure: 4GPa, temperature: 1200-1400°C at a predetermined temperature, holding time: 0.8 hours for ...

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Abstract

The invention provides a surface coating cutting tool which coats a (Til-XA1X)(CYN1-Y) layer formed by hexagonal phase and cubic phase mixed organization forming a film by means of chemical vapor deposition by taking A1 (CH3) as reaction gases on a matrix surface formed by WC-base cemented carbide, TiCN-base metal ceramics, cBN-base ultrahigh pressure sintered body, wherein X and Y are 0.60<=X<=0.95 and 0.0005<=Y<=0.005 by means of atomic ratio. When an inclined angle formed by the normal line of the surface (0001) of a particle of the hexagonal phase relative to the normal line direction of the surface of the matrix is detected, the zoning of the inclined angle in the range of 2-12 degrees has peak value and the degree proportion occupied in the zoning of the inclined angle is more than 40%, preferably, the average aspect ratio Alpha c of the cubic phase is less than 2, the average particle width Omega c is less than 0.3 [mu]m, and moreover, the average aspect ratio Alpha h of the hexagonal phase is more than 2, and the average particle width Omega h is in the range of 0.1-2 [mu]m.

Description

technical field [0001] The present invention relates to a surface-coated cutting tool (hereinafter referred to as a coated tool) whose hard coating layer is used in high-speed interrupted cutting processing accompanied by high heat generation of alloy steel and the like and impact load acting on the cutting edge Exhibits excellent chipping resistance. Background technique [0002] In the past, the following cladding tools are known, which are usually made of tungsten carbide (hereinafter represented by WC) based cemented carbide, titanium carbonitride (hereinafter represented by TiCN) based cermets or cubic boron nitride (hereinafter represented by cBN) ) based ultra-high pressure sintered body (hereinafter collectively referred to as the substrate), the surface of the Ti-Al composite nitride layer is formed by physical evaporation method as a hard coating layer, and these coating tools play an important role Excellent wear resistance. [0003] However, although the above-...

Claims

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Application Information

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IPC IPC(8): B23B27/00B23C5/00B23P15/28C23C16/30
CPCB23B27/148
Inventor 龙冈翔岩崎直之山口健志长田晃
Owner MITSUBISHI MATERIALS CORP
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