Preparation process of composite coating layer based on cutting tool

A cutting tool and composite coating technology, which is applied in the field of composite coating preparation technology, can solve the problems of poor coating conductivity, low tool toughness and long service life, and achieve good conductivity, long service life and good wear resistance. Effect

Inactive Publication Date: 2018-07-24
上海三朗纳米技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a composite coating preparation process based on cutting tools, which solves the technical problems of poor coating conductivity of cutting tools, low toughness of coated tools and long service life in the prior art

Method used

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  • Preparation process of composite coating layer based on cutting tool

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Comparison scheme
Effect test

Embodiment 1

[0022] A composite coating preparation process based on a cutting tool, including a CVD coating process inside the cutting tool and a PVD coating process outside the CVD coating; wherein,

[0023] The CVD coating process on the inside of cutting tools consists of the following steps:

[0024] Step 1: The cutting tool is subjected to cleaning pretreatment and cobalt removal pretreatment in sequence, and the cutting tool after decobalt pretreatment is cleaned and dried for use; it should be noted that the pre-cleaning treatment refers to the organic Dirt removal. Can be treated with alcohol or acetone. Decobalt pretreatment is to remove cobalt on the surface of cutting tools to improve the adhesion of later composite coatings. Cobalt removal pretreatment includes alkali etching with inorganic alkali solution for 2-20 minutes, cleaning after alkali etching, and then putting in inorganic acid solution for acid etching for 2-15 minutes. In this embodiment, the inorganic alkali s...

Embodiment 2

[0028] A composite coating preparation process based on a cutting tool, including a CVD coating process inside the cutting tool and a PVD coating process outside the CVD coating; wherein,

[0029] The CVD coating process on the inside of cutting tools consists of the following steps:

[0030] Step 1: Clean the cutting tool with alcohol before cleaning, and then use an inorganic alkali solution as w(KOH):w(K 3 [Fe(CN) 6 ]): w(H 2 O)=1:1:10, the alkali etching time is 10min, and the inorganic acid solution is v(H 2 SO 4 ):v(H 2 (0)=1:10, the acid etching time is 10min to carry out decobalt pretreatment, and the cutting tool after decobalt pretreatment is cleaned and dried for use.

[0031] Step 2: Put the cutting tool to be used in step 1 into the CVD diamond deposition furnace, then evacuate the CVD diamond deposition furnace, the pressure in the furnace should not be higher than 10pa, and then follow the CH4 、H 2 , N 2 The gas flow rate ratio is 1:250:1 into CH 4 、H 2...

Embodiment 3

[0034] A composite coating preparation process based on a cutting tool, including a CVD coating process inside the cutting tool and a PVD coating process outside the CVD coating; wherein,

[0035] The CVD coating process on the inside of cutting tools consists of the following steps:

[0036] Step 1: The cutting tool is cleaned with acetone before treatment, and then the inorganic alkali solution is used as w(KOH):w(K 3 [Fe(CN) 6 ]): w(H 2 O)=1:1:10, the alkaline etching time is 15min, and the inorganic acid solution is v(H 2 SO 4 ):v(H 2 (0)=1:10, the acid etching time is 13min for decobalt pretreatment, and the cutting tool after decobalt pretreatment is cleaned and dried for use.

[0037] Step 2: Put the cutting tool to be used in step 1 into the CVD diamond deposition furnace, then evacuate the CVD diamond deposition furnace, the pressure in the furnace should not be higher than 10pa, and then follow the CH 4 、H 2 , N 2 The gas flow rate ratio is 1:100:3 into CH 4...

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Abstract

The invention discloses a preparation process of a composite coating layer based on a cutting tool. The preparation process comprises the following steps of: carrying out cleaning pretreatment and cobalt-removing pretreatment in sequence on the cutting tool, cleaning, and then drying for spare use; introducing mixed gas of CH4, H2 and N2 according to the gas-flow speed ratio of 1:(100-300):(1-3),heating hot filaments to adjust the surface temperature of the cutting tool to be 600-1000 DEG C, and depositing for 6-10 hours to form a conducting diamond coating layer; and then carrying out TiN coating layer deposition on the surface of the CVD coating layer to obtain the cutting tool with the composite coating layer. The preparation process of the composite coating layer based on the cuttingtool has the beneficial effects that the tool with the composite coating layer is formed by coating the CVD conducting diamond coating layer in the cutting tool and then coating the TiN coating layeron the surface of the CVD conducting diamond coating layer; the cutting tool prepared by the preparation process is good in conductivity, strong in toughness, good in wear resistance and long in service life.

Description

technical field [0001] The invention belongs to the technical field of cutting tool processing and manufacturing, and in particular relates to a cutting tool-based composite coating preparation process. Background technique [0002] Therefore, the limitations of use are very large. At present, many new materials have emerged in various industries, especially aerospace, such as superalloy materials. This high-temperature alloy material has excellent high-temperature strength, good oxidation resistance and hot corrosion resistance, good fatigue performance, fracture toughness and other comprehensive properties, so it is also called "super alloy". However, this material is difficult to process, and it is generally achieved by using carbide tools coated with wear-resistant coatings. Cutting tools coated with a hard layer by physical vapor deposition (PVD) have been used commercially for many years. However, PVD-coated knives perform slightly worse in terms of wear resistance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/04C23C16/27C23C14/06C23C14/35
CPCC23C14/0036C23C14/0641C23C14/35C23C16/271C23C28/044
Inventor 姚勇
Owner 上海三朗纳米技术有限公司
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