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Surface-coated cutting tool

A cutting tool and surface coating technology, which is applied in the field of surface coating cutting tools, can solve problems such as insufficient adhesion strength, achieve excellent high temperature strength and high temperature hardness, and improve the effect of adhesion strength

Active Publication Date: 2014-04-30
MITSUBISHI MATERIALS CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the above-mentioned conventional coated tool is used under the conditions of high-speed heavy cutting and high-speed interrupted cutting, the lower layer composed of the Ti compound layer constituting the hard coating layer and the layer composed of Al 2 o 3 Insufficient adhesion strength of the upper layer composed of layers

Method used

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Experimental program
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Embodiment

[0097] 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. These raw material powders were blended into the compounding composition shown in Table 1, paraffin wax was further added, ball milled in acetone for 24 hours, dried under reduced pressure, and then punched into a green compact of a predetermined shape under a pressure of 98 MPa. The compact was vacuum sintered in a vacuum of 5 Pa at a specified temperature in the range of 1370 to 1470°C for 1 hour. After sintering, the cutting edge was subjected to R: 0.07mm edge grinding. In this way, tool bases A to F made of WC-based cemented carbide having an indexable insert shape specified in ISO·CNMG160608 were produced, respectively.

[0098] And, as the raw material powder, 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 were blen...

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Abstract

Provided is a surface-coated cutting tool whereby a hard coated layer exhibits excellent peeling resistance and chipping resistance during high-speed heavy-duty cutting and high-speed intermittent cutting. A surface-coated cutting tool formed by vapor deposition of a hard coated layer having a Ti compound layer as a lower layer and an a-Al2O3 layer as an upper layer; and wherein 30%-70% of the Al2O3 crystal particles immediately above the lower layer comprise (11-20)-orientated Al2O3 crystal particles, at least 45% of all the Al2O3 crystal particles in the upper layer comprise (0001)-oriented Al2O3 crystal particles, and, ideally, the uppermost surface layer of the lower layer comprises an oxygen-containing TiCN layer containing oxygen at 0.5-3 at.% across only a region of a depth of up to 500 nm, and the ratio between the number of oxygen-containing TiCN crystal particles in the uppermost surface layer of the lower layer and the number of Al2O3 crystal particles in the interface between the lower and upper layers is 0.01-0.5.

Description

technical field [0001] The present invention relates to a surface-coated cutting tool (hereinafter referred to as a coated tool) exhibiting excellent wear resistance for a long period of time. In this coated tool, even under heavy cutting conditions where a high load such as high speed, high depth of cut or high feed rate acts on the cutting edge, and in intermittent cutting where high speed and intermittent impact load acts on the cutting edge When cutting various steels or cast irons under different conditions, the hard coating also exhibits excellent peeling resistance and chipping resistance. [0002] This application claims priority based on Patent Application No. 2011-189003 for which it applied in Japan on August 31, 2011, and Patent Application No. 2012-187859 for which it applied in Japan on August 28, 2012, and uses the content here. Background technique [0003] In the past, it is known that there is a method of evaporating on the surface of a substrate (hereinaf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B27/14B23C5/16C23C16/30C23C16/32C23C16/34C23C16/36C23C16/40
CPCC23C30/005C23C16/029C23C28/044C23C16/36C23C16/0272C23C16/403B23B27/14C23C16/45523C23C28/042Y10T428/24975
Inventor 富田兴平长田晃
Owner MITSUBISHI MATERIALS CORP
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