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Surface coating cutting tool provided with hard coating layer having excellent anti-tipping performance

A cutting tool and surface coating technology, which is applied in the field of surface coating cutting tools, can solve the problems of sufficient chipping resistance, poor toughness, and inability to increase the Al content X of the film, etc., to achieve chipping suppression and excellent wear resistance Effect

Inactive Publication Date: 2013-12-18
MITSUBISHI MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] However, the coated tools described in the above-mentioned Patent Documents 1 and 2 are composed of (Ti 1-X al X ) The hard coating layer composed of N layer cannot increase the Al content X in the film, so for example, when it is used for high-speed interrupted cutting of alloy steel, it cannot be said that the chipping resistance is sufficient
[0016] On the other hand, for (Ti 1-X al X ) N layer, the Al content X can be increased, and a cubic crystal structure can be formed, 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. Poor, so when used as a coated tool for high-speed interrupted cutting of alloy steel, abnormal damage such as chipping, chipping, and peeling is prone to occur, and it cannot be said that satisfactory cutting performance can be achieved

Method used

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  • Surface coating cutting tool provided with hard coating layer having excellent anti-tipping performance
  • Surface coating cutting tool provided with hard coating layer having excellent anti-tipping performance
  • Surface coating cutting tool provided with hard coating layer having excellent anti-tipping performance

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Effect test

Embodiment 1

[0083] 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 carbide substrates with the blade shape of ISO standard SEEN1203AFSN are manufactured respectively. A~D.

[0084] 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 compounded into the composition shown in Table 2, wet mixed with a ball mill for 24 hours, after drying, stamping with a pres...

Embodiment 2

[0130] As raw material powders, cBN powder, TiN powder, TiCN powder, TiC powder, Al powder, and Al 2 o 3Powder, these raw material powders were blended into the compounding composition shown in Table 8, wet mixed with a ball mill for 80 hours and dried, and 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 The prepared WC-based cemented carbide support sheets having the 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 in an ordinary The conditions are pressure: 4GPa, temperature: 1200~1400℃, holding time at a predetermined tem...

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Abstract

The invention provides a surface coating cutting tool. According to the surface coating cutting tool, a base surface is covered by a hard coating layer constituted by a (Ti1-XA1X)(CYN1-Y) layer having a cubic crystal structure, which adopts the chemical vapor deposition film formation method using the A1(CH3)3 as the reaction gas. The atomic ratio of X,Y are 0.55<=X<=0.95, 0.0005<=Y<=0.005. The hard coating layer is provided with an area A layer and an area B layer. During the measurement of an inclined angle between a normal of a (110) surface of a grain and a normal direction of the base surface, the inclined angle value distribution can be acquired. A highest peak value exists in the inclined angles of the area A layer in a range from 2 to 12 degrees, and the degree ratio in a range from 2 to 12 degrees is more than 45% of the whole degrees. A highest peak value exists in the inclined angles of the area B layer in a range from 25 to 35 degrees, and the degree ratio in a range from 25 to 35 degrees is more than 60% of the whole degrees. The area A layer and the area B layer exist alternatively, and are respectively more than one layer.

Description

technical field [0001] The present invention relates to a surface-coated cutting tool (hereinafter referred to as a coated tool) whose hard coating is used in high-speed interrupted cutting of alloy steel and the like that are accompanied by high heat generation and impact loads 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 matrix), the surface of the matrix (hereinafter referred to as the matrix) is coated with a Ti-Al composite nitride layer as a hard coating layer by physical vapor deposition. Excellent wear resistance. [0003] However, although the above-ment...

Claims

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Application Information

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IPC IPC(8): B23C5/16B23B27/00C23C16/36
Inventor 龙冈翔五十岚诚岩崎直之长田晃
Owner MITSUBISHI MATERIALS CORP
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