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Surface-coated cutting tools with chipping resistance and chipping resistance in the hard coating layer

A cutting tool and surface coating technology, applied in the field of surface coating cutting tools, can solve the problems of defective tool life, easy to produce chipping, etc., and achieve the effect of excellent high temperature strength and excellent chipping resistance.

Active Publication Date: 2015-09-02
MITSUBISHI MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned coated tool has the problem that chipping, chipping, etc. are likely to occur under cutting conditions where a large load is applied to the cutting edge, and the tool life is short. Therefore, various efforts have been made to solve this problem. proposal

Method used

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  • Surface-coated cutting tools with chipping resistance and chipping resistance in the hard coating layer
  • Surface-coated cutting tools with chipping resistance and chipping resistance in the hard coating layer
  • Surface-coated cutting tools with chipping resistance and chipping resistance in the hard coating layer

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Experimental program
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Embodiment

[0069] Prepare WC powder, TiC powder, ZrC powder, VC powder, TaC powder, NbC powder, Cr 3 C 2 Powder, TiN powder, TaN powder and Co powder are used as raw material powders. These raw material powders are mixed into the compound composition shown in Table 1, and wax is added and mixed in acetone for 24 hours. After drying under reduced pressure, stamping with a pressure of 98MPa Shape the compact into a specified shape, vacuum sinter the compact in a vacuum of 5Pa and maintain a specified temperature in the range of 1370-1470°C for 1 hour, and after sintering, implement R: 0.07mm on the cutting edge. The edge grinding processing of WC-based cemented carbide tool substrates A to E with the insert shape specified in ISO standard CNMG120408 was manufactured respectively.

[0070] 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 are used as raw material powders. These raw material powder...

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Abstract

The invention provides a surface covering cutting tool having excellent anti-blade-breaking performance and good anti-damage performance in cutting rigid covering layer in high speed interrupted cut. The surface covering cutting tool is provided with a rigid covering layer formed by steaming on the surface of a tool substrate containing WC rigid alloy and TiCN base metallic ceramics. The rigid covering layer includes (a) a lower part layer containing Ti compound layer and (b) an upper part layer containing aluminum oxide layer. The upper part layer is distributed with micro holes having pore diameter of 2 to 50 nm and the pore size distribution of micro holes are arranged in a bimodal distribution.

Description

technical field [0001] The present invention relates to a surface-coated cutting tool (hereinafter referred to as a coated tool), which is used in high-speed intermittent cutting of various steels or cast irons with high heat generation and intermittent or impact loads acting on the cutting edge , Since the hard coating layer has excellent chipping resistance and chipping resistance, it will exhibit excellent cutting performance after long-term use. Background technique [0002] In the past, it is generally known that the surface of a substrate (hereinafter referred to as a tool substrate) composed of tungsten carbide (hereinafter represented by WC)-based cemented carbide or titanium carbonitride (hereinafter represented by TiCN)-based cermet consists of the following Coated tools made of hard coatings composed of (a) and (b): [0003] (a) The lower layer, which is a carbide (hereinafter represented by TiC) layer, a nitride (hereinafter also represented by TiN) layer, a car...

Claims

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Application Information

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IPC IPC(8): B23B27/14B23P15/28C23C16/30
Inventor 龙冈翔富田兴平中村惠滋长田晃
Owner MITSUBISHI MATERIALS CORP
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