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

Mg-Li-Al-Zn-Y cast magnesium lithium alloy and preparation method thereof

A technology for lithium alloy and magnesium casting, applied in the field of Mg-Li-Al-Zn-Y cast magnesium-lithium alloy and its preparation, can solve the problem of good structure and performance stability, small strengthening effect, poor alloy structure and performance stability, etc. problems, to achieve the effect of simple preparation process, avoiding volatilization and oxidation, and improving strength

Pending Publication Date: 2020-02-21
SHAANXI UNIV OF SCI & TECH
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, multi-element alloying is the most commonly used method to improve the mechanical properties of cast magnesium-lithium alloys. There are three main types of elements usually added to Mg-Li alloys: one is elements with large solid solubility, such as Ag, Cd, Hg, Zn, Al elements, etc., have a better strengthening effect, but the structure and performance stability of the alloy is poor; the second is elements with low solid solubility, such as Ni, Co, Cu, Ca, Sr elements, etc., the strengthening effect is small, but the structure and Good performance stability; third, elements with very small solid solubility, such as K, Be, B, Cr, Mo elements, etc.

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
  • Mg-Li-Al-Zn-Y cast magnesium lithium alloy and preparation method thereof
  • Mg-Li-Al-Zn-Y cast magnesium lithium alloy and preparation method thereof
  • Mg-Li-Al-Zn-Y cast magnesium lithium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] A kind of preparation method of Mg-Li-Al-Zn series cast magnesium-lithium alloy, comprises the following steps:

[0032] Step 1, according to the mass fraction Li: 8-11%, Al: 3-4%, Zn: 2.5-3.5%, Y: 0.5-1.2%, weigh Mg, Li, Al, Zn and Mg-20Y, first Vacuumize the induction heating furnace, and after the pressure is lower than 20Pa, fill the smelting environment with argon, so that the pressure in the smelting environment does not exceed atmospheric pressure, and melt Mg, Li, Al, Zn and Mg-20Y under a protective atmosphere to obtain molten State Mg-Li-Al-Zn-Y alloy; Stir at 715±15°C for 3-5min, then keep it warm for 10-12min; the purity of Mg, Li, Al, Zn and Mg-20Y master alloy is not less than 99%

[0033] Step 2, casting the molten Mg-Li-Al-Zn-Y alloy obtained in the step into a preheated mold, and after the ingot is fully cooled, take it out and air-cool it to obtain the cast alloy; the preheating temperature of the mold is 300- 320°C, the ingot is cooled with the mold...

Embodiment 1

[0035] According to the composition of the Mg-Li-Al-Zn-Y system, in this embodiment, the alloy composition is Mg-10Li-3Al-3Zn; calculate and weigh the raw materials Mg, Li, Al and Zn, and the purity is greater than 99%. The raw materials are put into a crucible, vacuumed and then ventilated with argon, melted and stirred for 3 minutes at 715±15°C using magnesium alloy induction casting equipment, and cast at 715±15°C into a mold with a temperature of 300°C±5°C. The ingot is fully cooled to 200-220°C and taken out for air cooling to obtain an alloy ingot.

[0036] The density of the magnesium-lithium alloy prepared by this example is 1.52g / cm 3 , The tensile strength is 180MPa, and the specified plastic elongation strength is 137MPa.

Embodiment 2

[0038]According to the composition of the Mg-Li-Al-Zn-Y system, in this example, the alloy composition is Mg-10Li-3Al-3Zn-0.5Y; calculate and weigh the middle of the raw materials Mg, Li, Al, Zn and Mg-20Y alloy, the purity of which is greater than 99%, put the raw materials into the crucible, vacuumize and pass argon, use magnesium alloy induction melting equipment to melt and stir at 700-730°C for 5min, and cast at 700-730°C to a temperature of 310°C In the mold of ±5°C, the ingot is fully cooled to 200-220°C, taken out and air-cooled to obtain an alloy ingot.

[0039] The density of the magnesium-lithium alloy prepared by this example is 1.52g / cm 3 , The tensile strength is 244MPa, and the specified plastic elongation strength is 228MPa.

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
Densityaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Plastic elongation strengthaaaaaaaaaa
Login to View More

Abstract

The present invention provides an Mg-Li-Al-Zn-Y cast magnesium lithium alloy and a preparation method thereof. Alloy elements are located in an alpha+beta biphasic region and a beta single-phase region of an Mg-Li binary phase diagram, and an alloy system is Mg-Li-Al-Zn-Y. The alloy comprises, by mass, 8%-11% of Li, 3%-4% of Al, 2.5%-3.5% of Zn, 0.5%-1.2% of Y, the balance Mg and unavoidable impurities, and the cast Mg-Li-Al-Zn-Y alloy is light and high in intensity. According to the preparation of the alloy, Mg, Li, Al, Zn and Mg are used as raw materials, an iron crucible is used in magnesium alloy induction melting and casting equipment to be protected by vacuum melting argon, and after casting cooling, the Mg-Li-Al-Zn-Y alloy is obtained. The Mg-Li-Al-Zn-Y cast magnesium lithium alloyhas low density, the density scope is 1.52g / cm<3>-1.56g / cm<3>, the addition of the alloy element improves the tensile strength of the magnesium lithium alloy, and the tensile strength range is 180-244MPa. The prepared Mg-Li- Al-Zn-Y alloy contains reinforcing phases such as AILi, Al2Y and Mg17Al12. According to the preparation method, the preparation process is simple, and the prepared Mg-Li-Al-Zn-Y alloy has good mechanical properties and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of metal structural materials, and relates to a method for designing a magnesium-lithium alloy by using a binary phase diagram and structure optimization of a magnesium-lithium alloy, in particular to a Mg-Li-Al-Zn-Y series cast magnesium-lithium alloy and a preparation method thereof . Background technique [0002] Magnesium-lithium alloy is by far the lightest metal structural material, which has the advantages of high specific strength and specific stiffness, and has potential application value in aerospace, weaponry and other fields. However, the low absolute strength and unstable mechanical properties of cast magnesium-lithium alloys limit the practical application of magnesium-lithium alloy castings. [0003] At present, the methods for improving the tensile strength of magnesium-lithium alloys at home and abroad mainly include multi-element alloying, modification treatment, cold rolling, extrusion, a...

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): C22C23/00C22C1/03
CPCC22C1/03C22C23/00
Inventor 宋文杰刘洁董会萍杨光师晶刘延辉李誉之
Owner SHAANXI UNIV OF SCI & TECH
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