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A soft-hard composite coating tool and its preparation method

A soft-hard composite and hard coating technology, applied in coating, metal material coating process, vacuum evaporation coating, etc., can solve the problems of rising residual stress of coating, thick design thickness of coating, and decreased bonding force of substrate. , to achieve the effect of improving cutting performance, improving wear resistance and reducing friction coefficient

Active Publication Date: 2019-03-01
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the composite coating does not have a transition layer structure, and the design thickness of the coating is relatively thick, the residual stress of the coating increases, and the bonding force with the substrate decreases significantly, and the coating is easy to peel off when used for cutting.

Method used

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  • A soft-hard composite coating tool and its preparation method

Examples

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Effect test

Embodiment 1

[0028] A soft-hard composite coating and its preparation method, the base material of the cutting tool is: YS8 cemented carbide; the coating material is: ZrN, CN x and WS 2 ;Deposit CN x The nitrogen and argon gas flow ratio is 5:1 (150sccm / 30sccm) to deposit "harder" CN x , the coating can be used to cut high-hard materials such as ZL108 high-silicon aluminum alloy, and the deposition method is: DC reactive magnetron sputtering + radio frequency magnetron sputtering. The steps of its preparation method are as follows:

[0029] (1) Pretreatment: Mirror-polish the cemented carbide substrate 1, then perform ultrasonic cleaning with acetone for 20 minutes, and ultrasonic cleaning with alcohol for 20 minutes to remove various stains on the surface of the substrate 1. Do not touch the sample with hands before and after coating. After fully drying, quickly put it into the vacuum chamber of the coating machine, and the vacuum chamber is evacuated to 4.0×10 -4 Pa, heat to 300°C, h...

Embodiment 2

[0036] A soft-hard composite coating and its preparation method. The material of the matrix 1 of the tool is: YS8 cemented carbide; the coating material is: ZrN, CN x and WS 2 ;Deposit CN xThe ratio of nitrogen and argon flow rate is 3:1 (90sccm / 30sccm) to deposit "softer" CN x , the coating can be used to cut 45 steel and other soft materials, the deposition method is: DC reactive magnetron sputtering + radio frequency magnetron sputtering. The steps of its preparation method are as follows:

[0037] (1) Pretreatment: Mirror-polish the cemented carbide substrate 1, then perform ultrasonic cleaning with acetone for 20 minutes, and ultrasonic cleaning with alcohol for 20 minutes to remove various stains on the surface of the substrate 1. Do not touch the sample with hands before and after coating. After fully drying, quickly put it into the vacuum chamber of the coating machine, and the vacuum chamber is evacuated to 4.0×10 -4 Pa, heat to 300°C, hold for 30min;

[0038] (2...

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Abstract

The invention discloses a soft and hard composite coated cutting tool and a preparation method thereof. The cutting tool comprises a substrate and a soft and hard composite coating coated on the outer surface of the substrate, wherein the substrate is made from hard alloy; the soft and hard composite coating sequentially comprises a ZrN transition layer, a CNx hard coating and a WS2 soft coating from inside to outside; the ZrN transition layer is prepared through a direct current reactive magnetron sputtering method; and both the CNx hard coating and the WS2 soft coating are prepared through a radio frequency magnetron sputtering method. The soft and hard composite coating in the invention combines the advantages of the WS2 soft coating and the CNx hard coating; the high hardness and the high wear resistance of the hard coating and the antifriction property of the soft coating are combined; and the therefore, the cutting tool can simultaneously have high wear resistance and very low friction coefficient.

Description

technical field [0001] The invention belongs to the technical field of mechanical cutting tool manufacturing, and in particular relates to a soft-hard composite coating tool and a preparation method thereof. Background technique [0002] According to the nature of the coating material, coated tools can be divided into two categories, namely hard-coated tools and soft-coated tools. The hard-coated tool is characterized by high hardness and good wear resistance, but its disadvantages are that the friction coefficient between the tool and the workpiece is high, and the cutting force is large, resulting in high cutting temperature and affecting the surface quality of the processed workpiece. The soft-coated tool is characterized by low shear strength and low friction coefficient between the tool and the workpiece, but the soft-coated tool has poor wear resistance and low tool life. The current development of coated tools is that the coating components tend to be diversified and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/06C23C14/35
CPCC23C14/0036C23C14/0623C23C14/0641C23C14/0658C23C14/345C23C14/352
Inventor 连云崧穆晨亮姚斌陈彬强陈汇丰
Owner XIAMEN UNIV
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