Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing gradient nano-structure on surface of high-strength high-hardness metal material

A metal material, surface gradient technology, applied in the field of material surface treatment, can solve the problem of low hardness and achieve the effect of low processing cost, increased thickness and increased depth

Active Publication Date: 2017-09-01
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing surface mechanical treatment methods are mainly used for metals with low hardness (hardness lower than HV300) and good plasticity such as pure iron, pure copper, pure nickel, pure titanium, stainless steel, magnesium alloy, aluminum alloy, titanium alloy, etc. Fabrication of material surface nanolayers

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
  • Method for preparing gradient nano-structure on surface of high-strength high-hardness metal material
  • Method for preparing gradient nano-structure on surface of high-strength high-hardness metal material
  • Method for preparing gradient nano-structure on surface of high-strength high-hardness metal material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with specific embodiments.

[0030] The invention provides a method for a gradient nanostructure on the surface of a high-strength and high-hardness metal material, comprising the following steps:

[0031] Step 1: Install the high-strength and high-hard metal material on the workbench 10, install the tool head, connect the tool head 11 and the workpiece 9 to the positive pole and the negative pole of the high instantaneous energy density pulse power supply 1 respectively, and pass the tool head 11 through The thread is connected to the output end of the ultrasonic transducer 12;

[0032] Step 2: Adjust the output pressure of the cylinder to 500-700N, keep the tool head 11 in good contact with the workpiece 9, turn on the high instantaneous energy density pulse power supply 1, the ultrasonic generator 2 and the nozzle 8, and the role of the tool head 11 in the ultrasonic generator 2 Do ultrasonic vib...

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
sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a gradient nano-structure on the surface of a high-strength high-hardness metal material. The method comprises the following steps: a tool head (11) and a workpiece (9) are correspondingly connected with the positive pole and the negative pole of a high-instantaneous-energy-density pulsed power supply (1); and favorable contact between the tool head (1) and the workpiece (9) is kept, the high-instantaneous-energy-density pulsed power supply (1), an ultrasonic generator (2) and a nozzle (8) are started up, and the tool head (11) performs ultrasonic vibration along a Z axis under the action of the ultrasonic generator (2) to start to perform high-instantaneous-energy-density electric impulse and ultrasonic combined treatment on the surface of the workpiece. An instantaneous high temperature and ultrasonic micromechanical impact combined function formed by electric impulses can greatly improve the local micro plasticity at processing points of such high-strength high-hardness metal materials as nickle-based high-temperature alloy, die steel and the like, and severe plastic deformation occurs at the processing points, so that the surface of the workpiece can be effectively nano-crystallized, and the average size of surface grains can be 30 nanometers or below.

Description

technical field [0001] The invention belongs to the field of material surface treatment, and in particular relates to a method for preparing a gradient nanostructure on the surface of a high-strength and high-hardness metal material. Background technique [0002] When the grain size on the surface of the metal material reaches the nanoscale (grain size <100nm), it will have excellent physical and chemical properties, which can significantly improve the comprehensive performance and life of its parts. [0003] At present, the methods commonly used at home and abroad to nanometerize the surface of metal materials mainly include laser shock method and surface mechanical treatment method. The laser shock method uses the mechanical effect of the high instantaneous energy density laser shock wave to form a large value of residual compressive stress and microstructure changes on the surface of the metal material, so that nano-grains can be obtained on the surface. However, the ...

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): C21D10/00C22F3/00
CPCC21D10/00C22F3/00
Inventor 纪仁杰刘永红金辉杨泽林张川张凡蔡宝平李小朋
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com