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Multicomponent composite coated cutting tool and its preparation method

A cutting tool and multi-component composite technology, which is applied in turning equipment, cutting tools for lathes, coatings, etc., can solve the problems of high brittleness, limited application, and insufficient hardness of TiC, and achieve improved service life and enhanced wear resistance. Effect

Inactive Publication Date: 2008-05-28
FUDAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hardness of TiN is not high enough, and the brittleness of TiC is very high, which limits their further application in the processing of high hardness workpieces.

Method used

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  • Multicomponent composite coated cutting tool and its preparation method
  • Multicomponent composite coated cutting tool and its preparation method
  • Multicomponent composite coated cutting tool and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: One layer of TiN and one layer of TiCN are plated, that is, a combined structure of n=1. Among them, the thickness of the Ti film coated on the body of the tool is 100nm; the thickness of the TiN film is 300nm, and the atomic ratio of Ti to N is controlled to 0.97; the thickness of the TiCN film is 1600nm, and the atomic ratio of Ti to (N+C) is 0.70, The atomic ratio of N to C is 1.0. The tool (tap) was prepared through the above process, and 12 taps processed a total of 4,713 workpieces, with an average of 392 pieces processed per tap, and the service life was 4.6 times that of uncoated. The cutting speed was 169 rpm.

Embodiment 2

[0033] Embodiment 2: Two layers of TiN and TiCN are plated, that is, a combined structure of n=2. Among them, the thickness of the Ti film coated on the body of the tool is 100nm; the thickness of the TiN film is 250nm, and the atomic ratio of Ti to N is controlled to 1.0; the thickness of the TiCN film is 1500nm, and the atomic ratio of Ti to (N+C) is 1.0, The atomic ratio of N to C was 1.7. The tool (tap) was prepared through the above process, and 11 taps processed 5632 workpieces, with an average of 512 pieces processed per tap, and the service life was 6.1 times that of uncoated. Cutting speed remains at 169 rpm.

Embodiment 3

[0034]Embodiment 3: A combined structure of three layers of TiN and TiCN, ie, n=3, is adopted. Among them, the thickness of the Ti film coated on the body of the tool is .80nm; the thickness of the TiN film is 100nm, and the atomic ratio of Ti to N is controlled to 1.03; the thickness of the TiCN film is 1000nm, and the atomic ratio of Ti to (N+C) is 1.01 , the atomic ratio of N to C is 1.2. The tool (tap) was prepared through the above process, and 70 taps processed a total of 31,894 workpieces, with an average of 456 pieces processed per tap, and the service life was 5.4 times that of the uncoated layer. The cutting speed was 169 rpm.

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Abstract

The present invention relates to a cutting tool with multicomponent composite coated layer. It uses cutting tool as base body, on the base body a transition layer Ti film is coated firstly, then n layers of TiN film and TiCN film composite hard coated layers are successively plated, in which the thickness of Ti film is 50-100 mm, the thickness of every layer of TiN film is 100-300 nm, and the thickness of every layer of TiCN film is 1000-1600 nm, the n is 1-4. The above-mentioned multicomponent composite coated layer can be prepared by using multi-arc source ion film-plating method.

Description

technical field [0001] The invention belongs to the technical field of superhard materials, and in particular relates to a cutting tool with multiple composite coatings and a preparation method thereof. Background technique [0002] In the nitrides, carbides, borides and oxides of transition metals, according to Haegg's law, non-metal atoms are embedded in the octahedral gap of metal atoms, relying on the full bonding of non-metal atoms and metal atoms to form a strong binding force. Macroscopically, it shows a high microhardness. Titanium nitride (TiN) and titanium carbide (TiC) belong to this type of structure (see figure 1) . [0003] Since the mid-1980s, it has been successfully used in anti-wear hard coatings. However, the hardness of TiN is not high enough, and the brittleness of TiC is very high, which limits their further application in the processing of high hardness workpieces. [0004] The rapid development of modern industrial level and science and technology...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B27/14C23C14/06C23C14/22
Inventor 严学俭张亚樑
Owner FUDAN UNIV