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Surface-coated cutware and process for producing the same

A cutting tool and surface coating technology, which is applied in the field of surface coating cutting tools and their manufacturing, can solve the problems of accelerated wear of wear-resistant hard layers and the like

Active Publication Date: 2009-08-19
MITSUBISHI MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In recent years, the high-performance and automation of cutting processing equipment have attracted attention. On the other hand, people have demanded labor-saving, energy-saving and low-cost cutting processing, and there has been a strong desire to manufacture high-speed There is a tendency towards a general-purpose surface-coated cutting tool that is not limited by the type of material to be cut. However, the current situation of the above-mentioned existing surface-coated cutting tool is that although it is used for cutting materials such as various steels or cast iron, There is no problem in the case of cutting under normal cutting conditions, but it is used for hard and difficult-to-cut materials such as Ti-based alloys, Ni-based alloys, Co-based alloys, and Al-Si alloys containing high Si. In the case of cutting processing under high-speed cutting conditions, the extremely high heat generated during cutting will significantly accelerate the wear of the wear-resistant hard layer, so that the service life will be reached in a short period of time

Method used

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  • Surface-coated cutware and process for producing the same
  • Surface-coated cutware and process for producing the same
  • Surface-coated cutware and process for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] As raw material powder, WC powder, TiC powder, ZrC powder, VC powder, TaC powder, NbC powder, Cr 3 C 2 powder, TiN powder, TaN powder and Co powder, etc., these raw material powders are mixed together according to the composition ratio shown in Table 1, wet mixed with a ball mill for 72 hours, dried, and pressurized with a pressure of 100MPa to form a compact Powder, the pressed powder is sintered in a vacuum at a temperature of 1400°C for one hour. After sintering, the blade is honed so that R is 0.03mm, and a WC with the blade shape of ISO standard CNMG120408 is formed. Cutting tool substrates A-1 to A-10 made of superhard alloy.

[0029] As raw material powders, TiCN (weight ratio TiC / TiN = 50 / 50) powder, Mo 2 C powder, ZrC powder, NbC powder, TaC powder, WC powder, Co powder, and Ni powder, etc., these raw material powders are mixed together according to the composition ratio shown in Table 2, wet mixed with a ball mill for 24 hours, and dried , with a pressure o...

Embodiment 2

[0066] As raw material powders, medium-coarse WC powder with an average particle diameter 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, 1.5 μm VC powder, 1.0 μm (Ti, W)C [mass ratio TiC / WC=50 / 50] powder, and 1.8 μm Co powder, these raw material powders are distributed according to the composition ratio shown in Table 5 Mix together, then add paraffin in acetone and mix in a ball mill for 24 hours. After drying under reduced pressure, pressurize and form various pressed powders with a predetermined shape at a pressure of 100 MPa. These pressed powders are placed in a vacuum atmosphere of 6 Pa. In the process, the temperature is raised to a predetermined temperature in the range of 1370-1470°C at a heating rate of 7°C / min, kept at this temperature for 1 hour, and sintered under the condition of furnace cooling to form three types with diameters of 8mm, ...

Embodiment 3

[0090] The diameters manufactured in Example 2 above are 8 mm (for forming cutting tool bases C-1 to C-3), 13 mm (for forming cutting tool bases C-4 to C-6), and 26 mm (for forming cutting tool bases C-4 to C-6). Three types of round bar sintered bodies that form cutting tool bases C-7, C-8) were manufactured by grinding from these three types of round bar sintered bodies. (cutting tool base D-1~D-3), 8mm×22mm (cutting tool base D-4~D-6), and 16mm×45mm (cutting tool base D-7, D-8) and the helix angles are Cutting tool substrates (drills) D-1 to D-8 made of 30-degree double-edged WC-based cemented carbide.

[0091] Next, the blades of these cutting tool bases (drills) D-1 to D-8 were honed, ultrasonically cleaned in acetone, dried, and then placed in the same manner. Figure 1A , 1B In the vapor deposition apparatus shown, under the same conditions as in the above-mentioned Example 1, a lower layer formed of a (Ti, Al)N layer having a target composition and a target layer thi...

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Abstract

A surface-coated cutting tool having a cutting tool base body and a hard coating layer physically vapor-deposited on the cutting tool base body, the hard coating layer having an upper layer formed of a chromium boride layer, and a layer composed of Ti and Al containing The lower layer formed of complex nitrides. The composite nitride preferably has a composition formula satisfying (Ti1-X, AlX)N (where X is 0.40-0.75 in terms of atomic ratio).

Description

technical field [0001] The present invention relates to the performance of cutting hard and difficult-to-cut materials such as Ti-based alloys, Ni-based alloys, Co-based alloys, and high-Si-containing Al-Si alloys under high-speed cutting conditions accompanied by high heat generation. Surface-coated cutting tool excellent in wear resistance and method of manufacturing the same. [0002] This application claims the priority of the following prior applications, Japanese Patent Application No. 2004-181248 filed on June 18, 2004, and Japanese Patent Application No. 2004-181250 filed on the same day, and their contents are cited here. , Japanese Patent Application No. 2004-181251 filed on the same date, Japanese Patent Application No. 2004-345465 filed on November 30, 2004, Japanese Patent Application No. 2004-345471 filed on the same day, Japanese Patent Application No. 2004-345474 filed on the same day, December 2004 Japanese Patent Application No. 2004-348163 filed on the 1st,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B27/14B23B51/00B23C5/16B23P15/28C23C14/06
Inventor 大上强田中裕介
Owner MITSUBISHI MATERIALS CORP