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A kind of b-cr/ta-c coating tool and preparation method thereof

A ta-c, coating technology, applied in the coating, metal material coating process, vacuum evaporation plating, etc., can solve the problems of low bond strength of the substrate, peeling off, aggravated film, etc., to reduce the internal stress of the coating , Increase bonding strength, reduce cutting force and cutting temperature

Active Publication Date: 2019-02-01
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, SP in DLC coating 3 The bond content is generally 30-50%, its hardness is generally less than 30GPa, and its bonding strength with the substrate is low
SP in tetrahedral amorphous carbon (ta-C) 3 The bond content is generally 60-90%, and there is SP 2 Therefore, compared with DLC, ta-C has higher hardness and good anti-friction and anti-wear properties, but it may exacerbate film peeling due to the existence of high stress in the film

Method used

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  • A kind of b-cr/ta-c coating tool and preparation method thereof

Examples

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example 1

[0017] Example 1: B-Cr / ta-C coated tool and its preparation method, the base material of the tool is high-speed steel or hard alloy, the coating is a multi-layer structure, the surface of the tool is B-Cr / ta-C coating, B There are TiCrN and Ti transition layers between the -Cr / ta-C coating and the substrate. The preparation method of the B-Cr / ta-C coated tool adopts the method of multi-arc ion plating + intermediate frequency magnetron sputtering co-deposition. Its concrete preparation steps are:

[0018] 1) Pre-treatment: Grind and polish the tool base material to the mirror surface, put it in alcohol and acetone for 20 minutes, and then ultrasonically clean it for 20 minutes to remove surface oil stains and other pollutants. After fully drying in a vacuum drying oven, quickly put it into the vacuum chamber of the coating machine. The background vacuum of the vacuum chamber is 7.0×10 -3 Pa, heated to 180°C, holding time 30min.

[0019] 2) Ion cleaning: Ar gas is introduced...

example 2

[0024] Example 2: B-Cr / ta-C coated tool and its preparation method, the base material of the tool is high-speed steel or hard alloy, the coating is a multi-layer structure, the surface of the tool is B-Cr / ta-C coating, B There are TiCrN and Ti transition layers between the -Cr / ta-C coating and the substrate. The preparation method of the B-Cr / ta-C coated tool adopts the method of multi-arc ion plating + intermediate frequency magnetron sputtering co-deposition. Its concrete preparation steps are:

[0025] 1) Pretreatment: Grind and polish the tool base material to the mirror surface, put it in alcohol and acetone and ultrasonically clean it for 30 minutes each to remove surface oil stains and other pollutants, use a vacuum drying oven to fully dry it and quickly put it into the vacuum chamber of the coating machine. The background vacuum of the vacuum chamber is 7.0×10 -3 Pa, heated to 180°C, holding time 40min.

[0026] 2) Ion cleaning: Ar gas is introduced, the pressure i...

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Abstract

The invention belongs to the technical field of manufacturing of mechanical cutting cutters, and particularly relates to a BCr / taC coated cutting tool and a preparing method thereof. The substrate material of the cutting tool is hard alloy or high-speed steel, and a method of multi-arc ion plating along with mid-frequency magnetron sputtering is adopted to prepare the cutting tool. The cutting tool has a multilayered structure, the surface of the cutting tool is a BCr / taC layer, and a TiCrN and Ti transition layer is between the BCr / taC layer and the substrate. The BCr / taC layer on the surface of the cutting tool has extremely high rigidity and intensity, a low friction coefficient and good thermal stability performance, and has high bonding strength with the substrate. In a cutting process, the cutting tool can effectively reduce friction, inhibit cementation, lower cutting force and cutting temperature, and thus the abrasion of the cutting tool is reduced, and the service life of the cutting tool is prolonged. The coated cutting tool can be widely applied in drying cutting and cutting machining of non-ferrous metals and difficult-to-machine materials.

Description

technical field [0001] The invention belongs to the field of mechanical cutting tool manufacturing, and relates to a B-Cr / ta-C coated tool and a preparation method thereof. Background technique [0002] Coating the tool is one of the important ways to improve the performance of the tool. At present, TiN, CrN, TiAlN, AlCrN and CrAlTi are commonly used in coated tools at home and abroad. Due to its low coefficient of friction, high hardness and anti-wear properties, DLC coatings are widely used on the surfaces of cutting tools, gears, abrasives and tools. However, SP in DLC coating 3 The bond content is generally 30-50%, its hardness is generally less than 30GPa, and its bonding strength with the matrix is ​​low. SP in tetrahedral amorphous carbon (ta-C) 3 The bond content is generally 60-90%, and there is SP 2 Therefore, compared with DLC, ta-C has higher hardness and good anti-friction and anti-wear properties, but it may exacerbate film peeling due to the existence of h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/32C23C14/02C23C14/35C23C14/16C23C14/06
CPCC23C14/022C23C14/0605C23C14/0641C23C14/16C23C14/325C23C14/35
Inventor 邢佑强吴泽黄鹏刘磊张远明
Owner SOUTHEAST UNIV
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