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Surface-coated cutting tool member having coating layer exhibiting superior wear resistance during high speed cutting operation and method for forming hard coating layer on surface of cutting tool

一种切削工具、高速切削的技术，应用在制造工具、刀夹的附件、金属加工设备等方向，能够解决硬质被覆层磨损增强等问题

Inactive Publication Date: 2005-07-20
MITSUBISHI MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In recent years, the high performance of cutting processing equipment has attracted attention. On the other hand, there is a strong demand for cutting labor and energy saving, and further cost reduction. There are cutting tools, although there is no problem when used under normal cutting conditions, but when used under high-speed cutting conditions with high heat generation, the wear of the hard coating layer constituting it is significantly increased, so the current situation is in Relatively short time to reach service life

Method used

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  • Surface-coated cutting tool member having coating layer exhibiting superior wear resistance during high speed cutting operation and method for forming hard coating layer on surface of cutting tool
  • Surface-coated cutting tool member having coating layer exhibiting superior wear resistance during high speed cutting operation and method for forming hard coating layer on surface of cutting tool
  • Surface-coated cutting tool member having coating layer exhibiting superior wear resistance during high speed cutting operation and method for forming hard coating layer on surface of cutting tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0027] First, WC powder, TiC powder, ZrC powder, VC powder, TaC powder, NbC powder, Cr 3 C 2 powder, TiN powder, TaN powder, and Co powder. These raw material powders were blended into the compounding composition shown in Table 1, wet-mixed with a ball mill for 72 hours, and after drying, pressurized into a compact with a pressure of 100 MPa. The powder is sintered in a vacuum of 6Pa at 1400°C for 1 hour. After sintering, the cutting edge part is honed with R: 0.03 to produce a sheet-shaped WC-based cemented carbide with ISO standard CNMG120408. Superhard substrates A-1 to A-10.

[0028] Furthermore, as raw material powders, TiCN (TiC / TiN=50 / 50 by weight ratio) powder, Mo 2 C powder, ZrC powder, NbC powder, TaC powder, WC powder, Co powder, and Ni powder, these raw material powders are compounded into the compounding composition shown in Table 2, wet mixed with a ball mill for 24 hours, after drying, pressurize with a pressure of 100MPa Compressed powders are formed into co...

Embodiment approach 2

[0040] As raw material powders, medium-coarse WC powder with an average particle size of 5.5 μm, fine-grained WC powder with 0.8 μm, TaC powder with 1.3 μm, NbC powder with 1.2 μm, ZrC powder with 1.2 μm, and Cr powder with 2.3 μm were prepared. 3 C 2 powder, VC powder of 1.5 μm, (Ti, W)C powder of 1.0 μm and Co powder of 1.8 μm, respectively mix these raw material powders into the compounding composition shown in Table 7, then add wax, and mix in acetone with a ball mill After 24 hours, after drying under reduced pressure, pressurize and mold various compressed powders with a given shape at a pressure of 100 MPa, and raise the temperature of these compressed powders to 1370-1370- A given temperature within the range of 1470°C, after being kept at this temperature for 1 hour, sintered under the condition of furnace cooling to form three kinds of round rod sintered bodies with diameters of 8mm, 13mm and 26mm for forming superhard matrix, and then by the above 3 A kind of round...

Embodiment approach 3

[0048] Use the diameters 8mm (for the formation of superhard substrates C-1 to C-3), 13mm (for the formation of superhard substrates C-4 to C-6), and 26mm (for the formation of superhard substrates C-7) manufactured in Embodiment 2 above. 3 kinds of round rod sintered bodies to C-8 formation), and the diameter×length of the groove forming part are respectively 4mm×13mm (superhard matrix D-1 to D-3), 8mm×22mm (superhard substrate D-4 to D-6) and 16mm×45mm (superhard substrate D-7, D-8) superhard substrate (drill bit) D-1 to D -8.

[0049] Then, the cutting edges of these superhard substrates (drill bits) D-1 to D-8 are honed, ultrasonically cleaned in acetone, and loaded into the same dry state. Figure 1A , 1B In the arc ion plating apparatus shown, the method of the present invention was implemented under the same conditions as in Embodiment 1 above, and hard coating layers were evaporated, and the hard coating layers were alternately spaced at the target intervals shown in...

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Abstract

The invention provides a surface coating cemented carbide cutting tool having a hard coating layer showing excellent wear resistance at high speed cutting. This surface coating cemented carbide cutting tool is made by physically evaporating a hard coating layer composed of a composite nitride of Al and Ti upon a surface of a tungsten carbide cemented alloy substrate or a titanium carbonitride-based cermet base with an average layer thickness of 1 to 15 mu m. The hard coating layer has a component concentration distributed structure wherein the Al maximum containing point (the Ti minimum containing point) and Al minimum containing point (Ti maximum containing point) alternately and repeatedly exist in a layer thickness direction at specified intervals, and wherein the content Al of (Ti) is successively changed from the Al maximum containing point to the Al minimum containing point, and from the Al minimum containing point to the Al maximum containing point. The Al maximum containing point satisfies a composition formula: (AlXTi1-X)N (in an atomic ratio, X indicates 0.70 to 0.95), and the Al minimum containing point satisfies a composition formula: (AlYTi1-Y)N (in the atomic ratio, Y indicates 0.40 to 0.65). A clearance between the adjacent Al maximum containing point and Al minimum containing point is made to be 0.01 to 0.1 mu m.

Description

technical field [0001] The present invention relates to a surface-coated cutting tool component (hereinafter referred to as a coated cutting tool part) in which a hard coating layer has excellent high-temperature characteristics and therefore exhibits excellent wear resistance in high-speed cutting processes involving high-heat generation of various steels and cast irons. cutting tools). [0002] In addition, the present invention relates to a method of forming the above-mentioned hard coating layer on the surface of a cutting tool. Background technique [0003] Generally, cutting tools include multi-edged inserts that are detachably attached to the tip of the tool for turning and planing of various steels and cast irons, and for drilling holes in the above-mentioned workpieces. Drills and small drills used in , and three-dimensional end mills used in face cutting, groove processing, shoulder processing, etc. of the above-mentioned workpieces, etc. Type end mills are also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C30/00
CPCY10T428/24942C23C14/0641Y10T428/265Y10T428/24975C23C30/005B23B27/14C23C14/06
Inventor 佐藤和则近藤晓裕田中裕介
Owner MITSUBISHI MATERIALS CORP