AN/Crl-xAlxN/Cr30 (Al, Y) 70N hard gradient coating and preparation method thereof

A gradient coating and coating technology, applied in the direction of coating, metal material coating process, ion implantation plating, etc., can solve the problems of affecting the bonding force of coating film base, low ionization rate of sputtering particles, and other problems. , to improve thermal performance and high temperature oxidation resistance, to avoid the effect of sub-interface
CN102766846AActive Publication Date: 2012-11-07SOUTH CHINA UNIV OF TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2012-11-07

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Abstract

The invention discloses an AN / Crl-xAlxN / Cr30 (Al, Y) 70N hard gradient coating and a preparation method of the AN / Crl-xAlxN / Cr30 (Al, Y) 70N hard gradient coating. The coating is prepared on hard alloy or a steel base body, and the structure of the coating consists of three parts, wherein the first part is a CrN or TiN film layer which is taken as a bonding layer and a transition layer; the second part is a Crl-xAlxN gradient film layer, the aluminum content X in a structural formula from the inside to the outside of the gradient film layer linearly transits to 0.7 from 0.1; and the outer layer of the third part of the coating is a Cr30 (Al, Y) 70N film layer containing yttrium. The preparation method of the AN / Crl-xAlxN / Cr30 (Al, Y) 70N hard gradient coating comprises the steps of preprocessing the surface of a workpiece, preheating, cleaning and etching the surface, preparing a transition layer, preparing the gradient film layer and preparing the Cr30 (Al, Y) 70N film layer. According to the AN / Crl-xAlxN / Cr30 (Al, Y) 70N hard gradient coating and the preparation method of the AN / Crl-xAlxN / Cr30 (Al, Y) 70N hard gradient coating, due to the design of the coating structure and the adoption of the hollow cathode and ion plating combined preparation technology, the Cr-Al-N series coating with excellent mechanical property and high-temperature oxidation resistance can be obtained.
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Description

technical field

[0001] The invention belongs to the surface engineering technology in the field of mechanical processing and molds, and specifically relates to a binary nitride / Cr compound with high bonding force, high hardness and high temperature oxidation resistance. 1-x Al x N / Cr 30 (Al,Y) 70 N hard gradient coating and its preparation method, wherein the binary nitride is CrN or TiN. Background technique

[0002] Aluminum, chromium, titanium and other transition metal nitrides, carbides, and carbonitride ceramic coatings have high hardness and oxidation resistance, and have been widely used in the field of machining tools and molds. Compared with uncoated tools and molds, the above-mentioned coating can improve machining accuracy and efficiency, and greatly prolong the service life of tools and molds.

[0003] Ion plating (AIP), magnetron sputtering (MS), arc discharge evaporation and ion beam assisted deposition (IBAD) or the combined application of the above metho...

Claims

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