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Surface coated member and cutting tool

A surface coating and component technology, applied in the direction of manufacturing tools, turning equipment, tool holder accessories, etc., can solve the problems of insufficient adhesion, low hardness, wear, etc., to achieve the effect of improving adhesion and inhibiting peeling

Active Publication Date: 2012-09-26
KYOCERA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under such severe cutting conditions, only the peak intensity of the diffraction peak, that is, the orientation direction of the entire crystal, described in the above-mentioned Patent Document 1 and Patent Document 2 is controlled. 2 o 3 layer, Al 2 o 3 The adhesion of the layer is not sufficient and cannot resist harsh cutting conditions. It exists in the Al 2 o 3 The case where the boundary between a layer and its underlying layer is delaminated
[0011] In addition, as described in Patent Document 3, Al 2 o 3 If the layer has a k-type crystal structure, it can strengthen the adhesion with the lower layer, but due to the k-type crystal structure of Al 2 o 3 Harder than Al with α-type crystal structure 2 o 3 The hardness is low, so there is a problem that the wear progresses quickly

Method used

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  • Surface coated member and cutting tool
  • Surface coated member and cutting tool
  • Surface coated member and cutting tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] To tungsten carbide (WC) powder with an average particle size of 1.5μm, add metallic cobalt (Co) with an average particle size of 1.2μm at 6% by mass, and add tantalum carbide (TaC) powder at 0.2% by mass, and mix them. Press forming to form a cutting tool shape (CNMA120412). The obtained molded body was subjected to a binder removal treatment, and fired in a vacuum of 0.5 to 100 Pa at 1400° C. for one hour to produce a cemented carbide. Then, with respect to the produced cemented carbide, the rake face side is subjected to edge treatment (R honing) by brushing.

[0093] Next, for the above-mentioned cemented carbide, various coating layers 3 were formed by the CVD method under the film forming conditions and layer structures shown in Tables 1 to 4. Then, the surface of the coating layer 3 was brushed from the rake face side for 30 seconds to produce surface-coated cutting tools of sample Nos. 1 to 29.

[0094] [Table 1]

[0095]

[0096] [Table 2]

[0097]

[0098] *Al 2 ...

Embodiment 2

[0130] With respect to the cemented carbide of Example 1 that was subjected to a cutting edge treatment (R honing), various coating layers 3 were formed by the CVD method under the film forming conditions and layer structures shown in Table 1 and Table 7. The same evaluations as in Example 1 were performed on the obtained samples (30 to 33). The results are shown in Tables 8-10.

[0131] [Table 8]

[0132]

[0133] Note: The content in () indicates the layer thickness (unit: μm)

[0134] [Table 9]

[0135]

[0136] Note: The content in () indicates the layer thickness (unit: μm)

[0137] Note 1) The contents in [] indicate Al 2 O 3 Crystal system.

[0138] [Table 10]

[0139]

[0140] It can be seen from Tables 1, 8 to 10 that any of sample Nos. 30 to 33 has Al in the cutting evaluation 2 O 3 The peeling of the layer is suppressed and the cutting performance is excellent in chipping resistance.

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Abstract

Disclosed is a surface coated member having excellent adhesion resistance and fracture resistance. A surface coated member (1) comprises a coating layer (3) on the surface of a base (2). The coating layer (3) is composed of a multilayer body wherein a titanium carbonitride (TiCN) layer (4), a continuously existing intermediate layer (5) containing titanium, aluminum, carbon and oxygen and having an average film thickness of 5-30 nm, and an a-aluminum oxide (Al2O3) layer (9) composed of aluminum oxide (Al2O3) having an a crystal structure are sequentially formed by deposition.

Description

Technical field [0001] The present invention relates to a surface-coated member having a coating layer formed on the surface of a base and a cutting tool using the surface-coated member. Background technique [0002] Conventionally, as a cutting tool widely used for cutting of metals and printed circuit boards, etc., it is known that a single-layer or multilayer coating layer is formed on the surface of a substrate such as cemented carbide, cermet, or ceramic. Coated cutting tools. As the coating layer, a layer of titanium carbide (TiC), titanium nitride (TiN), titanium carbonitride (TiCN) and aluminum oxide (Al 2 O 3 ) Layer and other structure covering layer. [0003] Due to the Al in the coating layer 2 O 3 The layer has excellent oxidation resistance. Therefore, even in cutting conditions where the cutting edge is likely to be formed at high temperatures, such as the processing of difficult-to-cut materials such as cast iron or alloy steel, or the processing conditions where c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B27/14C23C16/36
CPCC23C30/005C23C28/00C23C16/30C23C16/403C23C16/36C23C16/0272C23C28/02Y10T428/26
Inventor 谷渊荣仁儿玉芳和深野刚
Owner KYOCERA CORP