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Coated cutting tool

A cutting tool and coating technology, used in the manufacture of tools, workpieces, drilling tool accessories, etc., can solve the problems of poor durability, large tool damage, easy to contain, etc., and achieve the effect of improving durability

Pending Publication Date: 2021-08-06
MOLDINO TOOL ENG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hard coating coated by the sputtering method is not sufficiently densified compared with the hard coating coated by the arc ion plating method, and inevitably contains more Ar.
Therefore, compared with the AlCrSi nitride-coated cutting tool proposed by the sputtering method, the tool damage is larger and the durability is lower than the AlCrSi nitride-coated cutting tool by the arc ion plating method. Poor tendency, there is still room for improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060]

[0061] As a tool, the composition is WC(bal.)-Co(8 mass%)-V(0.3 mass%)-Cr(0.4 mass%), and the hardness is 94.0HRA (Rockwell hardness, the value measured according to JIS G 0202). An indexable insert tool made of cemented carbide (manufactured by Mitsubishi Hitachi Tool Co., Ltd.).

[0062] In Examples 1 to 3 and Comparative Examples 1 to 3, a sputtering apparatus capable of mounting six sputtering evaporation sources was used. Among these vapor deposition sources, three AlCrSi alloy targets were installed in the apparatus as vapor deposition sources. In addition, a target having a size of Φ16 cm and a thickness of 12 mm was used.

[0063] Fix the tool on the sample holder inside the sputtering apparatus and connect the bias power supply to the tool. In addition, the bias power supply is configured to apply a negative bias voltage to the tool independently of the target. The tool rotates by itself at 2 revolutions per minute, and revolves via the fixed jig and the...

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Abstract

A coated cutting tool of the present invention has a hard coat on the surface of a base material. The hard coat is a nitride of Al, Cr, and Si, comprising 50 atom% or more Al, 30 atom% or more Cr, and between 1 atom% and 5 atom% inclusive Si. The hard coat contains 0.02 atom% Ar. The atomic ratio A thereof and the atomic ratio B of nitrogen satisfy the relationship 1.02 <= B / A <= 1.10. The diffraction peak originating from the (111) plane of a face-centered cubic lattice structure exhibits the maximum intensity. In a cross-sectional observation, the hard coat has, per 100 M[u]2, less than one droplet having an equivalent circle diameter of 3 micrometers or larger. For the surface of the hard coat, the value of the arithmetic mean peak curvature Spc (1 / mm), as defined in ISO 25178, is 5,000 or lower.

Description

technical field [0001] The present invention relates to a coated cutting tool having a hard coating on the surface of a base material. [0002] This application claims priority based on Patent Application No. 2019-055368 filed in Japan on March 22, 2019, and the content thereof is hereby cited. Background technique [0003] Nitride of AlCrSi is a kind of film excellent in wear resistance and heat resistance, and is widely used for coating cutting tools. In general, AlCrSi nitrides used for coating cutting tools are also coated using an arc ion plating method that is excellent in adhesion to the base material in the physical vapor deposition method. However, in the arc ion plating method, since the target component is vaporized and coated by arc discharge, the hard coating inevitably contains a large number of droplets of several micrometers. In the case of coating a tool with a diameter of 3 mm or less, or even a small diameter tool of 1 mm or less, the impact of the dropl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B27/14B23C5/16C23C14/06
CPCC23C28/044C23C30/005C23C14/0641C23C14/3485C23C14/345C23C14/0036C23C14/022C23C28/04C23C28/34C23C28/347C23C14/5886B23B27/14B23C5/16B23B27/148B23B2228/10C23C14/34
Inventor 佐佐木智也
Owner MOLDINO TOOL ENG LTD