High-plasticity magnesium alloy and preparation method thereof

A magnesium alloy, high plasticity technology, applied in the direction of manufacturing tools, heat treatment equipment, metal extrusion dies, etc., can solve the problems that are difficult to meet industrial applications, the strength of magnesium-lithium alloys decreases, etc., to achieve industrial applications, easy access, and process flow simple effect

Pending Publication Date: 2022-04-29
CHONGQING UNIV
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the Li content increases, the strength of magnesium-lithium alloys decreases.
Generally, the tensile strength of dual-phase Mg-Li alloys and single-β-Li phase Mg-Li alloys is less than 150 MPa, which is difficult to meet industrial applications.

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
  • High-plasticity magnesium alloy and preparation method thereof
  • High-plasticity magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] In the preparation method of the present invention, wherein step C), the conditions of extrusion molding are: extrusion ratio of 28:1, extrusion speed of 1-3m / min; extrusion temperature of 200-300 °C to ensure good plasticity; if the extrusion temperature is lower than 200 °C, the extrusion ratio is less than 28, the extrusion speed is less than 1m / mi n, there will be thermal extrusion deformation difficulties, the sample surface burrs increase; if the extrusion temperature is higher than 300 °C, the extrusion ratio is higher than 28, the extrusion speed is higher than 3m / min, The sample will appear blackened, overburned, and reduced mechanical properties.

[0041] The proportion of the elements in the alloy in this application and the individual process technical parameters in the preparation method are discovered by experimentation and are optimal, because they allow you to obtain the claimed comprehensive technical results. Violation of element ratio, alloy properties de...

Embodiment 1

[0043] A highly plastic magnesium alloy, in terms of mass fraction, its chemical element composition includes: Gd 2.0%, Li 8%, the rest are Mg and unavoidable impurities, the total content of impurities is less than or equal to 0.3%.

[0044] The present invention further provides a method for preparing a highly plastic magnesium alloy, comprising the following steps:

[0045] 1) Pretreatment: surface grinding of industrial pure magnesium ingots, magnesium-lithium intermediate alloys and magnesium gadolinium intermediate alloys, remove the oxide layer on the surface, and place them in turn after industrial alcohol, and place them in an ultrasonic cleaner for cleaning;

[0046] 2) CO in volume ratio of 99:1 2 and SF 6Under the protection of the mixed gas, the pretreated pure magnesium ingot and magnesium gadolinium intermediate alloy are placed in the proportion of the above mass fraction into the crucible and placed in a resistance furnace, heated to 750 ° C, until completely mel...

Embodiment 2

[0051] A highly plastic magnesium alloy, in terms of mass fraction, its chemical element composition includes: Gd 4.0%, Li 8%, the rest are Mg and unavoidable impurities, and the total impurity content is less than or equal to 0.3%.

[0052] The present invention further provides a method for preparing a highly plastic magnesium alloy, comprising the following steps:

[0053] 1) Pretreatment: surface grinding of industrial pure magnesium ingots, magnesium-lithium intermediate alloys and magnesium gadolinium intermediate alloys, remove the oxide layer on the surface, and place them in turn after industrial alcohol, and place them in an ultrasonic cleaner for cleaning;

[0054] 2) CO in volume ratio of 99:1 2 and SF 6 Under the protection of the mixed gas, the pretreated pure magnesium ingot and magnesium gadolinium intermediate alloy are placed in the proportion of the above mass fraction into the crucible and placed in a resistance furnace, heated to 750 ° C, until completely melt...

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
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a high-plasticity magnesium alloy which comprises the following chemical elements in percentage by mass: 1.0-8.0% of Gd, 5.5-10% of Li and the balance of Mg and inevitable impurities, and the total content of the impurities is less than or equal to 0.3%. The invention further discloses a preparation method of the high-plasticity magnesium alloy. According to the high-plasticity magnesium alloy provided by the invention, the beta-Li phase of the BCC structure with more slippage systems is introduced into the alpha-Mg phase, so that a double-phase structure is constructed, and the plasticity of the magnesium alloy is improved; a certain amount of Gd element is added into the Mg-Li alloy, so that the texture is weakened, and non-basal plane slippage is promoted; plasticizing methods of introducing a beta-Li phase with good plasticity, weakening a texture and the like are combined, and the plasticity of the magnesium alloy is improved through compounding.

Description

Technical field [0001] The present invention belongs to the field of metal processing technology, specifically relates to a high plastic magnesium alloy and a preparation method thereof. Background [0002] With the depletion of global resources and the increasingly serious environmental problems, environmental protection and energy conservation and emission reduction have become the current focus of attention. Aerospace, transportation and 3C products have increasingly demanding lightweight structural materials, and countries have accelerated the development and application of various types of light alloys. Magnesium and magnesium alloys as the lightest metal structural materials, with low density, high specific strength and specific stiffness, good electromagnetic shielding and vibration absorption performance, easy to recycle advantages, so known as the 21st century green structural materials, the application prospects are broad. However, the room temperature deformation abil...

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): C22C23/00C22C23/06C22C1/03C22F1/06C21D9/00B21C25/02
CPCC22C23/00C22C23/06C22C1/03C22F1/06C21D9/0075B21C25/02
Inventor 王敬丰任杰马凯代朝能
Owner CHONGQING UNIV
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