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Hard alloy cutter with two structural coatings

A coating and cutting tool technology, applied in the field of ceramic coating cutting tools, can solve the problems of reducing roughness, affecting the beauty of the blade, poor bonding force, etc., reducing stress and strain, good wear resistance, and good thermal shock resistance. Effect

Active Publication Date: 2011-02-09
CHENGDU TOOL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to further reduce the roughness of the coating surface and improve the surface quality of the coating, we creatively propose to deposit a layer of PVD-TiN coating on the post-treated CVD coating, and then perform sandblasting. The benefits of this Yes: The particles of PVD-TiN are smaller than CVD-TiN, so its surface is denser and self-lubricating, which increases the resistance to Al 2 o 3 The protective effect of the coating, in addition, after sandblasting the CVD coating, it may cause some TiN particles with poor bonding force to peel off, so that the lower layer of Al 2 o 3 If the coating is exposed, if the CVD coating is sandblasted, the surface of the TiN coating will peel off more, and the surface will form yellow and black patterns, which will affect the appearance of the blade.

Method used

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  • Hard alloy cutter with two structural coatings
  • Hard alloy cutter with two structural coatings
  • Hard alloy cutter with two structural coatings

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Experimental program
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Embodiment 1

[0022] Medium-temperature continuous chemical coating is deposited on WC-Co cemented carbide substrate, and its structure is as follows: medium-temperature TiN (0.5 μm) + medium-temperature TiCN (7 μm) + transition layer + high-temperature α-Al 2 o 3 (4μm) + high temperature TiN (1.0μm).

[0023] Medium temperature-TiN:

[0024] Reactive gas: H 2 , N 2

[0025] Gas Flow (SLM): 64 38

[0026] TiCl 4 Water bath temperature 55°C; CH 3 CN water bath temperature 30°C

[0027] Reaction temperature: 850-910°C

[0028] Furnace pressure: 15Kpa

[0029] Deposition time: 5min

[0030] Medium temperature-TiCN:

[0031] Reactive gas: H 2 , N 2 CH 4

[0032] Gas Flow (SLM): 64 18 2

[0033] TiCl 4 Water bath temperature 55°C; CH 3 CN water bath temperature 30°C

[0034] Reaction temperature: 850-910°C

[0035] Furnace pressure: 10Kpa

[0036] Deposition time: 45min

[0037] Transition layer: Ti(C,N,O) or Ti(C,O)

[0038] Reactive gas: H 2 CH 4 ArCO 2 HCl

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Abstract

The invention relates to a hard alloy cutter with two structural coatings, solving the problems of the existing cutter such as high surface roughness, poor corrosion resistance and poor toughness and thermal shock resistance. The hard alloy matrix is provided with a medium and high temperature continuous chemical composite coating; and after the sandblast treatment is performed to the medium and high temperature continuous chemical composite coating, a surface TiN coating is deposited on the chemical composite coating through the physical deposition method.

Description

Technical field: [0001] The invention relates to a ceramic coated cutting tool, specifically: chemical coating (CVD) + physical coating (PVD) dual-structure coating, a cemented carbide cutting tool for high-speed and high-efficiency cutting. technical background: [0002] Hard coating is one of the key technologies of modern manufacturing industry. The technological progress of manufacturing industry puts forward higher and higher requirements for the hard coating of tools. Cutting tools are subjected to enormous mechanical and thermal loads during the cutting process, and are prone to wear and wear damage, resulting in a sharp decline in their service life. Therefore, it is extremely important to improve the life of cutting tools by surface modification of cutting tools and improving surface properties. The cutting tool surface coating technology can effectively improve its cutting performance and service life, so that the tool can obtain excellent comprehensive performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C14/22
Inventor 周彤李洪林曾祥才李波高见王瑚袁晓光夏云吴春涛胡恒宁宋洪刚
Owner CHENGDU TOOL RES INST