Amorphous cutting tool coating used for dry machining of aluminum alloy and preparation method of the coating

A technology for aluminum alloys and cutting tools, which is applied in the field of coating and preparation of amorphous cutting tools for aluminum alloy dry processing, and can solve the problems of high preparation temperature and strict temperature resistance requirements of cutting tool materials

Active Publication Date: 2017-08-29
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation temperature of this method is high, and the temperature resistance of the tool material is strictly required.

Method used

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  • Amorphous cutting tool coating used for dry machining of aluminum alloy and preparation method of the coating
  • Amorphous cutting tool coating used for dry machining of aluminum alloy and preparation method of the coating
  • Amorphous cutting tool coating used for dry machining of aluminum alloy and preparation method of the coating

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preparation example Construction

[0049] In order to obtain the amorphous tool coating for aluminum alloy dry machining described in the application, the application also provides a preparation method for the amorphous tool coating for aluminum alloy dry machining, comprising the following steps:

[0050] A bonding layer is deposited on the surface of the workpiece to be plated after pretreatment by magnetron sputtering;

[0051] Depositing a transition layer on the surface of the bonding layer by magnetron sputtering under reactive vapor deposition conditions;

[0052] A functional film layer is deposited on the surface of the transition layer, and the functional film layer is composed of alternately stacked A layers and B layers, the number of layers of the A layer is ≥1, the number of layers of the B layer is ≥1, and the The layer A is obtained by magnetron sputtering, and the layer B is obtained by applying a bias voltage to carbon ions or carbon-hydrogen ions.

[0053] In the above-mentioned process of p...

Embodiment 1

[0076] Embodiment 1 Pretreatment of workpiece to be plated, preparation of bonding layer and transition layer

[0077] (1) Degrease the workpiece to be plated-ordinary tool, degrease with lye, rinse with pure water, dehydrate and dry with hot air (120°C) to remove rust, oil stains and other stains on the workpiece;

[0078] (2) Put the workpiece to be plated through the process (1) into the vacuum chamber;

[0079](3) Vacuumize the vacuum chamber and heat the vacuum chamber at the same time, keeping the heating temperature at 150°C; when the vacuum degree of the vacuum chamber is better than 5×10 -4 After Pa, adjust the temperature of the vacuum chamber and stabilize it at 120°C;

[0080] (4) The vacuum chamber is fed with argon gas, and the anode layer ion source is operated in the high voltage and low current discharge mode to generate argon ions; at the same time, the bias power supply is turned on, and the bias value is set to -1500V, and the workpiece to be plated is sub...

Embodiment 2

[0082] Example 2 Preparation of Amorphous Tool Coatings for Dry Machining of High-Strength Aluminum Alloys Using Magnetron Sputtering Deposition Method

[0083] (1)~(5) the pretreatment of the workpiece to be plated, the preparation of the bonding layer and the preparation of the transition layer are the same as in Example 1;

[0084] (6) Under argon atmosphere, magnetron sputtering chromium target and graphite target at the same time, the power supply of the sputtering target is DC power supply, and the power density of the sputtering target is less than 8W / cm 2 ;During the coating process, the vacuum degree is 0.5Pa, and the temperature of the vacuum chamber is adjusted and stabilized at 120°C; a bias voltage of -100V is applied to the workpiece to deposit and coat the a-CrC / a-C amorphous sub-film layer, and the bias power supply is a DC power supply;

[0085] (7) Repeat step (6) of this embodiment, wherein, only magnetron sputtering graphite target material is carried out, ...

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Abstract

The invention provides an amorphous cutting tool coating used for dry machining of aluminum alloy. The amorphous cutting tool coating includes a binding layer which is laminated to the surface of a cutting tool, a transition layer which is laminated to the surface of the binding layer, and a functional film layer which is laminated to the surface of the transition layer and is composed of a layer A and a layer B that are alternately overlapped on each other. Number of the layer A is not less than 1 and number of the layer B is not less than 1. The layer A has an amorphous chromium carbide-amorphous carbon composite structure, wherein the amorphous chromium carbide is dispersed and distributed in the amorphous carbon as a substrate. The layer B is a diamond-like layer. The application also provides a preparation method of the amorphous cutting tool coating used for dry machining of aluminum alloy and provides a coated cutting tool. The amorphous cutting tool coating has high-temperature wear resistance, in particular, high hardness, low friction coefficient and good thermostability, and also is non-stick to aluminum. After machining with the cutting tool, aluminum alloy has smooth surface and stable chemical performance. The cutting tool is not chemically reacted with an aluminum work piece.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to an amorphous tool coating for aluminum alloy dry processing and a preparation method thereof. Background technique [0002] In recent years, my country's aerospace and transportation industries have developed rapidly. As the country advocates energy conservation and emission reduction, various manufacturers are actively conducting equipment lightweight research, so as to achieve energy conservation, emission reduction, and cost savings. In order to reduce the weight of aircraft and auto parts, the use of aluminum alloy is increasing year by year. Aluminum alloy materials are widely used in auto parts. In order to increase the strength of aluminum alloys, a large amount of silicon is usually added to aluminum alloys, such as the metal type gravity casting A319 aluminum alloy (containing 6.5wt% Si) used to process cylinder heads, Die cast A380 aluminum alloy (containing 8.5 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/14C23C14/06
CPCC23C14/0036C23C14/0057C23C14/0605C23C14/0635C23C14/14C23C14/345C23C14/352
Inventor 孙德恩李静梁斐珂
Owner CHONGQING UNIV
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