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Surface-coated member, method for manufacture thereof, and cutting tool

A technology for surface coating and cutting tools, which is applied in the direction of manufacturing tools, turning equipment, drilling tool accessories, etc. Deterioration and other problems, to achieve the effect of improving chip discharge performance, suppressing crater wear, and improving chip discharge performance

Active Publication Date: 2012-07-18
KYOCERA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Cutting is a processing method that transfers the surface shape of the cutting tool to the material to be cut. Therefore, the deterioration of the surface roughness of the cutting tool surface due to the adhesion of coarse particles will cause a decrease in the surface accuracy of the material to be cut.
In addition, there is a problem that during cutting, the coarse particles are threshed from the surface of the coating layer, so large unevenness is formed on the surface of the coating layer, which increases the cutting resistance, reduces the surface accuracy of the material to be cut, and generates burrs. , the coating layer is easily partially peeled off from the surface of the substrate, and as a result, the wear resistance and fracture resistance of the cutting tool are reduced
[0020] However, in the case of using the PVD method, there are problems of wear resistance and chipping resistance due to the above-mentioned coarse particles; in the case of using the CVD method, there is a problem of deterioration of the lubricity of the workpiece.

Method used

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  • Surface-coated member, method for manufacture thereof, and cutting tool
  • Surface-coated member, method for manufacture thereof, and cutting tool
  • Surface-coated member, method for manufacture thereof, and cutting tool

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0056] figure 1 is a perspective view showing the cutting tool according to the first embodiment; figure 2 yes figure 1 The enlarged cross-sectional view of the A-A line of the cutting tool; image 3 (a) is an enlarged explanatory view showing the surface of the coating layer of the chip breaking surface of the present embodiment, image 3 (b) is an enlarged explanatory view showing the surface of the coating layer of the ridge surface; Figure 4 It is an enlarged cross-sectional view showing the vicinity of the surface of the coating layer of the present embodiment.

[0057] Such as figure 1 As shown, the cutting tool 1 of this embodiment (hereinafter referred to as the tool 1) is formed in a substantially flat plate shape, the front surface 3 is arranged on the main surface (upper surface) of the base body 2, the rear surface 4 is arranged on the side surface of the base body 2, and the front surface 3 and the rear surface 4 are arranged. A cutting edge 5 is provided o...

no. 2 approach

[0107] Next, a cutting tool according to a second embodiment will be described in detail with reference to the drawings. Figure 7 is an enlarged cross-sectional view showing the vicinity of the surface of the coating layer of this embodiment; Figure 8 It is a scanning electron microscope (SEM) photograph (magnification: 3000 times) showing the coating layer surface of the blade (honing portion) of this embodiment; Figure 9 It is an SEM photograph (magnification: 3000 times) showing the surface of the coating layer of the ridge surface of this embodiment. In addition, in Figure 7-9 in, with the above Figure 1~6 The same or equivalent parts are denoted by the same symbols, and their descriptions are omitted.

[0108]In the cutting tool according to the present embodiment, the surface of the substrate is coated with a coating layer by CVD, and the plurality of recesses on the surface of the coating layer are more present on the front surface than on the cutting edge (honi...

Embodiment I

[0145]

[0146] 88.5% by mass of tungsten carbide (WC) powder with an average particle size of 1.5 μm, 6% by mass of metallic cobalt (Co) powder with an average particle size of 1.2 μm, and 0.5% by mass of titanium carbide (TiC) powder with an average particle size of 2.0 μm %, TaC powder with an average particle diameter of 2.0 μm was added and mixed at a ratio of 5% by mass to obtain a mixture.

[0147] Next, the mixture was molded into a cutting tool shape (CNMG120408) by press molding, then subjected to binder removal (Binder) treatment, and burned at 1500° C. for 1 hour in a vacuum of 0.01 Pa to produce a cemented carbide. Then, the resulting cemented carbide is subjected to edge strengthening treatment (honing R) from the front side by brush machining.

[0148] Next, various coating layers are formed on the above-mentioned cemented carbide by the CVD method. Specifically, under the coating conditions shown in Table 1, a coating layer having the multilayer film composi...

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Abstract

Disclosed is a surface-coated member comprising a substrate and a coaling layer formed on the surface of the substrate. On the surface of the coating layer, two or more first phases and a second phase coexist. Each of the first phases comprises at least one compound having an oxygen and at least element selected from metals belonging to Groups 4, 5 and 6 in the periodic table, aluminum and silicon, and the second phase comprises at least one compound selected from a carbide, a nitride and a carbonitride of at least one element selected from metals belonging to Groups 4, 5 and 6 in the periodic table, aluminum and silicon. Also disclosed is a method for manufacture of the surface-coated member. Further disclosed is a cutting tool having the surface-coated member. The cutting tool comprises a rake face formed on the upper surface of the cutting tool, a flank face formed on a side surface of the cutting tool, and a cutting blade formed on a ridge line formed at the intersection of the rake face and the flank face, wherein the rake face comprises at least the surface of the coating layer.

Description

technical field [0001] The present invention relates to a surface-coated member, a method for producing the same, and a cutting tool. Coating layer with various characteristics such as wear resistance. Background technique [0002] For a long time, in the cutting of cast iron, carbon steel, stainless steel and other metals, it has been widely used on the surface of hard alloys such as tungsten carbide-based superhard alloys and titanium-based cermets to be coated with titanium carbide, nitride, etc. Surface-coated cutting tools (hereinafter referred to as cutting tools) with hard coatings (ie, hard coatings, hereinafter referred to as coatings) composed of titanium-based compounds such as titanium and titanium carbonitride, which are excellent in mechanical hardness . [0003] Recently, in consideration of the increase in cutting speed, the handling of difficult-to-cut materials, the environment, etc., cutting is required to be performed in a dry process without using cutt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/30B23B27/14B23B51/00B23C5/16
Inventor 深野刚伊藤博俊
Owner KYOCERA CORP