Heat treatment method for regulating and controlling microstructure of magnesium-gadolinium alloy

A heat treatment method and microstructure technology, which is applied in the field of heat treatment to regulate the microstructure of alloys, can solve the problems of decreased elongation, low high-temperature mechanical properties of magnesium alloys, and increased alloy strength, so as to achieve improved mechanical properties and excellent room temperature/high temperature mechanics. performance effect

Active Publication Date: 2022-03-08
BEIJING UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the disadvantages that the high-temperature mechanical properties of magnesium alloys are generally not high at present, and provides a heat treatment technology suitable for Mg-Gd-Er-Zn-Zr alloys, which can realize the regulation and control of different types of second phases in the alloys. The technical parameters such as temperature and holding time can obtain the ideal second phase structure in the same alloy, and

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
  • Heat treatment method for regulating and controlling microstructure of magnesium-gadolinium alloy
  • Heat treatment method for regulating and controlling microstructure of magnesium-gadolinium alloy
  • Heat treatment method for regulating and controlling microstructure of magnesium-gadolinium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Keep the Mg-15Gd-5Er-5Zn-0.5Zr alloy at 550°C for 100h, then air-cool for 30min, then put it into the furnace for the second heat preservation treatment, the heat preservation temperature is 525°C, the heat preservation time is 90h, and then air-cooled After 30 minutes, a large number of long rod-shaped phases were formed in the alloy. The strength of the alloy at room temperature was 450 MPa, and the elongation was 25%. At 350°C, the strength was 260 MPa, and the elongation was 35%.

Embodiment 2

[0029] The Mg-15Gd-5Er-5Zn-0.2Zr alloy was kept at 550°C for 36h, then air-cooled for 10min, and then put into the furnace for the second heat preservation treatment. The heat preservation temperature was 525°C, the heat preservation time was 26h, and then air-cooled 10min, then carry out the third heat preservation treatment, the heat preservation temperature is 510 ℃, the heat preservation time is 20h, there are a large amount of long rod-shaped phases to form in the alloy (see figure 1 Shown), the strength of the alloy at room temperature is 420MPa, the elongation is 21%, at 350 ℃ its strength is 270MPa, the elongation is 15%.

Embodiment 3

[0031] Keep the Mg-12Gd-1Er-1Zn-0.3Zr alloy at 500°C for 10h, then air-cool for 10min, then put it into the furnace for the second heat preservation treatment, the heat preservation temperature is 475°C, the heat preservation time is 5h, and then air-cooled After 10 minutes, the alloy contains a large number of long rod-shaped phases. The strength of the alloy at room temperature is 400MPa, and the elongation is 18%. At 250°C, the strength is 220MPa, and the elongation is 23%.

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
Room temperature strengthaaaaaaaaaa
Strengthaaaaaaaaaa
Room temperature strengthaaaaaaaaaa
Login to view more

Abstract

A heat treatment method for regulating and controlling the microstructure of a magnesium-gadolinium alloy belongs to the technical field of heat treatment, and the alloy comprises the following components by weight percent: 6-15% of Gd, 0-5% of Zn, 0-5% of Er, 0.1-0.6% of Zr, 0.03-0.85% of Zn/RE (Gd, Er) and the balance of magnesium. And alternate circulating cold and heat treatment of furnace temperature heat preservation and air cooling keeping is carried out for multiple times. The alloy treated by the technology has excellent room-temperature/high-temperature mechanical properties, and can be used in a plurality of advanced technical fields with higher requirements on alloy products.

Description

technical field [0001] The invention relates to a heat treatment method for adjusting and controlling the microstructure of an alloy. The alloy treated by the technology has excellent room temperature / high temperature mechanical properties, and can be used in many cutting-edge technical fields with high requirements for alloy products. Background technique [0002] At present, magnesium alloy is the third type of metal structure material with the lowest density among metal structure materials developed after steel and aluminum alloy, and is called the green engineering material of the 21st century. Moreover, my country is rich in magnesium resources, the reserves of magnesium minerals rank first in the world, and the output of metal magnesium ranks first in the world. The country pays more and more attention to the use of magnesium and magnesium alloy products. Magnesium alloys are used in the field of industrial products, which can not only reduce the weight of equipment, b...

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
IPC IPC(8): C22F1/06C22C23/06
CPCC22F1/06C22F1/002C22C23/06
Inventor 刘轲胡大龙杜文博李淑波于子健杜宪
Owner BEIJING 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