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cutting tool

A cutting tool and cutting edge technology, which is applied in the direction of manufacturing tools, workpieces, turning equipment, etc., can solve the problems of insufficient cutting performance of cutting tools, and achieve the effects of suppressing boundary damage, improving edge rolling resistance, and high hardness

Active Publication Date: 2017-03-08
KYOCERA CORP
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, even the coating film (coating layer) in which the second layer is grown in a direction inclined at an average angle of 1 to 15° with respect to the direction perpendicular to the surface of the base as described in Patent Document 1 is not suitable as a cutting tool. The overall cutting performance is still insufficient and needs further improvement

Method used

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Embodiment Construction

[0021] According to the cutting tool of the present invention as a preferred embodiment figure 1 , 2 , the cutting tool 1 includes a base body 2 and a coating layer 6 covering the surface of the base body 2 . The coating layer 6 is composed of elongated columnar crystals 7 . In the present invention, the so-called columnar crystal 7 means that the direction with the longest length of the crystal is taken as the longitudinal direction of the crystal, and the longest length among the directions perpendicular to the longitudinal direction is taken as the length of the width direction of the crystal. , a crystal having an aspect ratio that is a ratio of length in the longitudinal direction / length in the width direction of the crystal is 1.5 or more. Since the coating layer 6 is composed of columnar crystals 7, the wear resistance and chipping resistance of the flank face 4 and the rake face 3 are high. That is, if the crystals constituting the coating layer 6 are not columnar c...

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Abstract

Problem: To provide a cutting tool that exhibits superior chipping resistance and wear resistance. Resolution means: A cutting tool 1 is provided with a base 2, and a coating layer 6 comprising columnar crystals 7 that cover the surface of the base 2. A Cutting edge 5 is formed at the crossing ridge line of a rake face 3 and a flank face 4. The average inclination angle (¸2) of the flank face 4, in the longitudinal direction of the columnar crystals 7 with respect to the direction orthogonal to the surface of the base 2, is greater than the average inclination angle (¸1) of the rake face 3, in the longitudinal direction of the columnar crystals 7 with respect to the direction orthogonal to the surface of the base 2.

Description

technical field [0001] The present invention relates to a cutting tool in which a coating layer is formed on the surface of a substrate. Background technique [0002] The process used for cutting tools is to form a film on the surface of a substrate composed of sintered alloys such as superhard alloys and cermets, high-hardness sintered bodies of diamond or cBN (cubic boron nitride), and ceramics such as alumina and silicon nitride. coating layer to improve wear resistance and chipping resistance. [0003] In addition, coating layers such as TiAlN have been continuously studied. For example, Patent Document 1 discloses a coating film (coating layer) in which the columnar crystals of the second layer of the TiAlN-based coating layer laminated in two layers are aligned in a direction perpendicular to the surface of the substrate. It grows in the direction inclined at an average angle of 1-15°. [0004] prior art literature [0005] patent documents [0006] Patent Documen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B27/14B23B51/00B23C5/16
CPCB23B27/14B23B2228/10C23C14/0664C23C14/3464C23C30/005C23C14/505B23B2228/105
Inventor 朱耀灿
Owner KYOCERA CORP