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Preparation method of diamond coated cutting tool

A diamond coating and diamond technology, applied in metal material coating technology, coating, superimposed layer plating, etc., can solve the problems of unfavorable industrial production and practical application, long time, etc., to improve the processing effect and reduce the edge Chipping and reduced processing costs

Inactive Publication Date: 2017-10-20
ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent document "A Preparation Method of Diamond Coated Cutting Tool and Application of the Diamond Coated Cutting Tool in the Preparation of Printed Circuit Boards" with the application number CN201310355819.5 mentions that a sol-gel method is used to prepare a thickness of 0.5- 5μm silicon dioxide film and reduction of silicon dioxide film to obtain silicon / silicon carbide transition layer, but the transition layer prepared by this method takes a long time, reaching 120-160h, which is not conducive to industrial production and practical application

Method used

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  • Preparation method of diamond coated cutting tool
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  • Preparation method of diamond coated cutting tool

Examples

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Embodiment 1

[0035] A preparation method of a diamond-coated cutting tool of the present invention, comprising the following steps:

[0036] (1) Substrate selection: A cemented carbide blade with a WC grain size of 0.4 μm to 1.5 μm and a Co content of 6wt% is selected as the substrate material, and a flat blade with a blade size of 12mm×12mm×4mm.

[0037] (2) Substrate corrosion treatment:

[0038] (2.1) Alkali corrosion: Put the blade in step (1) into the alkaline solution for ultrasonic corrosion for 10 minutes, the alkaline solution is K 3 [Fe(CN) 6 ], KOH and H 2 Mixed solution of O, K 3 [Fe(CN) 6 ], KOH and H 2 The mass ratio of O was 1:1:20, and then sprayed with tap water for 3 minutes to remove the corrosive liquid on the surface of the substrate, then placed in pure water for ultrasonic cleaning for 5 minutes, and finally air-dried.

[0039] (2.2) Acid corrosion: put the air-dried blade in step (2.1) into the acid solution for 5 minutes, and the acid solution is HNO 3 、H 2...

Embodiment 2

[0048] A preparation method of a diamond-coated cutting tool of the present invention, comprising the following steps:

[0049] (1) Substrate selection: A cemented carbide rod with a WC grain size of 0.6 μm to 1.5 μm and a Co content of 6 wt% is selected as the tool substrate. According to the processing requirements of composite materials, the twist drill bit with double-vertex angle structure is prepared through grinding center processing, and the tool specification is φ3×28×φ6×70mm. Knives are cleaned to remove surface oil.

[0050] (2) Substrate corrosion treatment:

[0051] (2.1) Alkali corrosion: Put the tool obtained in step (1) into the alkaline solution for ultrasonic corrosion for 20 minutes, the alkaline solution is K 3 [Fe(CN) 6 ], KOH and H 2 Mixed solution of O, K 3 [Fe(CN) 6 ], KOH and H 2 The mass ratio of O was 1:1:50, and then sprayed with tap water for 3 minutes to remove the corrosive liquid on the surface of the tool, then put it into pure water for...

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Abstract

The invention discloses a preparation method of a diamond coated cutting tool. The preparation method comprises the following steps: (1) corroding a cutting tool base body; (2) depositing a Cr / CrN transition layer; and (3) depositing a diamond coating. With adoption of the preparation method, the binding force between the diamond coating and a hard alloy base is effectively improved, Co diffusion is also restrained, and nucleation and growth of the diamond coating are facilitated to form the diamond coating with high adhesive force; after depositing the diamond coating, contents of Co on the surface layer and the interior of the hard alloy are basically kept consistent, so that Co deficiency on the surface layer does not cause strength reduction of the cutting tool, and the Cr / CrN transition layer facilitates keeping of keenness of the cutting edge of the cutting tool.

Description

technical field [0001] The invention belongs to the field of preparation of hard alloy diamond-coated cutting tools, and relates to a preparation method of diamond-coated cutting tools, in particular to an acid-base corrosion pretreatment process and a transition layer to improve the combination of diamond coating and hard alloy substrate Preparation method of diamond-coated cutting tools for high strength. Background technique [0002] Diamond has high hardness, and the diamond coating prepared by hot wire chemical vapor deposition (HFCVD) can be deposited on the complex-shaped cemented carbide tool substrate. Composite materials and AlSi alloys and other materials have a relatively high service life, which is more than 10 times that of ordinary carbide tools, and have high cost performance and market prospects. [0003] There are two points to overcome in the combination of diamond coating and cemented carbide substrate. First, the thermal expansion coefficients between ...

Claims

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Application Information

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IPC IPC(8): C23C28/00C23C14/16C23C14/06C23C16/27C23C14/02
CPCC23C28/322C23C14/021C23C14/0641C23C14/16C23C16/271C23C28/347
Inventor 徐银超王社权陈响明温光华李园园
Owner ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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