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

Active Publication Date: 2012-11-07
SOUTH CHINA UNIV OF TECH +1
View PDF4 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned patented technology of Cr-Al-N gradient coating has the following problems: 1) Using a single magnetron sputtering technology, the ionization rate of sputtered particles is low, which affects the film-base bonding force of the coating; 2) There is still a multi-layer composition mutation interface in the step change; 3) The composition of the top layer of the coating needs to be further optimized to improve the high temperature performance of the coating in order to meet the harsh processing conditions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • AN/Crl-xAlxN/Cr30 (Al, Y) 70N hard gradient coating and preparation method thereof
  • AN/Crl-xAlxN/Cr30 (Al, Y) 70N hard gradient coating and preparation method thereof
  • AN/Crl-xAlxN/Cr30 (Al, Y) 70N hard gradient coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 High-speed steel (SKH51) milling cutter and surface coating treatment of test piece

[0037] The material grade of the milling cutter is SKH51. During the surface treatment, a 10x10x20 (mm) rectangular sample with the same heat treatment system (the Rockwell hardness is HRC65 after quenching + tempering treatment) is placed in the furnace, and one side of the sample is ground and polished. , in order to coat TiN / Cr 1-x Al x N / Cr 30 (Al,Y) 70 The relevant properties were tested after N gradient coating.

[0038] (1) Surface pretreatment of workpieces and samples: Boil the workpieces and samples in alkaline metal cleaning solution for 120 minutes to degrease the surface (the oil stain on the surface of the milling cutter is serious); place the workpieces and samples in an alkaline solution at room temperature Ultrasonic cleaning machine (frequency 40kHz, intensity 100W / liter) for metal cleaning liquid for 15 minutes; put the cleaned workpieces and samples in...

Embodiment 2

[0047] The surface treatment of embodiment 2 cemented carbide rail machining blade

[0048] A CrN / Cr 1-x Al x N / Cr 30 (Al,Y) 70 The preparation method of N gradient coating comprises the following steps and process conditions:

[0049] (1) Pretreatment of the surface of the hard alloy rail processing knife: put the blade in an alkaline metal cleaning solution and boil for 40 minutes to degrease the surface; at room temperature, place the blade in an ultrasonic cleaning machine (frequency 20kHz , the intensity is 10W / liter) in ultrasonic treatment for 10 minutes; put the cleaned blade into pure ethanol solution for dehydration, and then place it in an oven at 120°C for 60 minutes.

[0050] (2) Preheating of carbide rail processing blades: put the pretreated blades into a vacuum coating furnace, and vacuumize to 5x10 -3 After Pa, pass Ar gas to maintain a vacuum of 2.3x10 -1 Pa, start the HCD electron gun and the auxiliary auxiliary resistance heating device in the furnace...

Embodiment 3

[0056] Example 3 Surface Treatment of Cold Work Die Steel SKD1 Alloy Substrate

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
hardnessaaaaaaaaaa
Login to view more

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.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C14/22
Inventor 彭继华苏东艺
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap