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Surface-coated tool

A technology of surface coating and tools, which is applied in the field of surface coating tools, can solve the problems of insufficient hard film adhesion, increased tool surface roughness, and smaller contact area, so as to achieve uniform structure and composition, and wear resistance High performance and high fracture resistance, high hardness

Inactive Publication Date: 2009-04-01
KYOCERA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, as in Patent Document 6, when the first layer is applied with a low bias voltage, the average particle size of the hard film becomes large, so the contact area with the substrate becomes small, and as a result, the adhesion of the hard film Insufficient, so membrane detachment occurs at an early stage
In addition, since the second layer is formed by a high bias voltage, a large number of droplets are generated, and the surface roughness of the tool surface becomes large.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0094]

[0095] Mainly composed of tungsten carbide (WC) powder with an average particle size of 0.8 μm, 10% by mass of cobalt (Co) powder with an average particle size of 1.2 μm, 0.2% by mass of cobalt (Co) powder with an average particle size of 1.0 μm Vanadium (VC) powder, 0.6% by mass of chromium carbide (Cr 3 C 2 ) powder is formed into a triangular groove cutting tool shape (Kyocera groove insert GBA43R300MY) by press molding, followed by binder removal treatment, and fired at 1450°C for 1 hour in a vacuum of 0.01Pa. into a superhard alloy. In addition, the surface of the rake face of each sample was ground by shot blasting, brushing, or the like. In addition, the produced cemented carbide is subjected to edge treatment (honing) by brush processing to form a base.

[0096] A hard coating layer was formed on each of the compositions shown in Table 1 on the substrate produced in this way by a sputtering method. In addition, in sample No. I-7, a TiN layer was formed w...

Embodiment II

[0115]

[0116] Mainly composed of tungsten carbide (WC) powder with an average particle size of 0.8 μm, 10% by mass of cobalt (Co) powder with an average particle size of 1.2 μm, 0.2% by mass of cobalt (Co) powder with an average particle size of 1.0 μm Vanadium (VC) powder, 0.6% by mass of chromium carbide (Cr 3 C 2 ) powder, formed into the shape of a cutting tool for edge exchange milling (BDMT11T308ER-JT) by stamping, followed by binder removal treatment, and fired at 1450°C for 1 hour in a vacuum of 0.01Pa to make a cemented carbide . In addition, the rake face surface of each sample was ground by shot blasting, brushing, or the like. In addition, the produced cemented carbide is subjected to edge treatment (honing) by brush processing to form a base.

[0117] A hard coating layer with various compositions shown in Table 3 was formed on the substrate produced in this way by a sputtering method. In addition, in sample No. II-7, a TiN layer was formed with a layer th...

Embodiment III

[0136]

[0137] cBN raw material powder with an average particle size of 2.5 μm, TiC raw material powder with an average particle size of 1.5 μm, TiN raw material powder with an average particle size of 1.2 μm, TiCN raw material powder with an average particle size of 1 μm, and NbC raw material powder, TaC raw material powder with an average particle size of 1.1 μm, Ni raw material powder with an average particle size of 0.9 μm, metal Al raw material powder with an average particle size of 1.2 μm, metal Co raw material powder with an average particle size of 0.8 μm, The composition shown in Table 5 was prepared, and the powder was mixed for 16 hours with a ball mill using alumina balls. Then, the mixed powder was press-molded under a pressure of 98MPa. Use ultra-high pressure and high temperature equipment to heat up the obtained molded body at the speed shown in Table 5, and after firing at a pressure of 5.0 GPa at the temperature and time shown in Table 5, the temperature ...

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Abstract

A surface coated tool including a substrate, and stacked layers composed of two coating layers represented by the following general formula (1) on the substrate is provided. A first coating layer to be coated on the surface of the substrate, which has a thickness of 0.1 to 1 [mu]m, is composed of a granular crystal having a mean crystal diameter of 0.01 to 0.1[mu]m. A second coating layer to be coated on the surface of the first coating layer, which has a thickness of 0.5 to 5 [mu]m, is composed of columnar crystal grown in a direction perpendicular to the substrate, and the columnar crystal has a mean crystal width of 0.05 to 0.3[mu]m in a direction parallel to the substrate while a mean crystal width thereof is larger than the mean crystal diameter of the first coating layer. [Formula 3] M 1 - a Al a (C b N 1-b ) (1) wherein, M represents at least one metal element selected from the group consisting of the elements of Groups 4, 5 and 6 of the periodic table, Si and rare earth elements, ''a'' satisfies the relation of 0.25 a 0.75, and ''b'' satisfies the relation of 0 b 1.

Description

technical field [0001] The present invention relates to a surface-coated tool in which a hard coating film is formed on the surface of a substrate. Background technique [0002] Recently, in surface-coated tools as described above, various hard coating layers are formed on the surface of hard materials such as WC-based cemented carbide and TiCN-based cermets to improve sliding properties, wear resistance, Among the methods for improving chip resistance, a hard coating layer formed by a physical vapor phase synthesis method is widely used in various applications due to its high hardness and high wear resistance. As the physical vapor phase synthesis method, a method of forming a TiAIN layer using an arc ion plating method or a sputtering method can be performed well, and further, improvement of a TiAIN layer for prolonging tool life has been studied. [0003] For example, in Patent Document 1, it is disclosed that by forming a hard film in which low-hardness TiAIN layers and...

Claims

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Application Information

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IPC IPC(8): B23B27/14C04B35/583C23C14/06C23C14/34
Inventor 朱耀灿野田谦二松泽正人
Owner KYOCERA CORP
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