Unlock instant, AI-driven research and patent intelligence for your innovation.

Alloy for magnesium and magnesium alloy grain refinement and preparation method thereof

a technology of magnesium alloy and grain refinement, which is applied in the field of intermediate alloys, can solve the problems of large gap between the development potential and actual applications of magnesium and magnesium alloy in the field of metal materials, and the inability to achieve the effect of grains refinement, and achieve the effect of strong nucleation capability, excellent capability of magnesium and high degree of refinemen

Inactive Publication Date: 2015-07-30
SHENZHEN SUNXING LIGHT ALLOYS MATERIALS CO LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a new type of alloy that can be used to refine the grain structure of magnesium and magnesium alloys. The alloy contains a compound called ZrB2, which has strong nucleation ability. When used in magnesium alloys, it forms small particles that help create better and more uniform crystal nuclei. This results in better quality magnesium alloy with improved strength and performance, making it useful in a variety of industrial applications.

Problems solved by technology

There is a great gap between the development potential and actual applications of magnesium and magnesium alloy in the field of metal materials.
Zr can be used in pure Mg, Mg—Zn and Mg-RE; but Zr has very low solubility in liquid magnesium, and when peritectic reaction occurs, only 0.6wt % Zr can be dissolved in liquid magnesium; moreover, Zr and Al, Mn will form a stable compound to precipitate, which cannot achieve the effect of grains refinement.
Therefore, Zr cannot be added to Mg—Al-based and Mg—Mn-based alloys.
The Mg—Al-based alloy has a large as-cast grain, and sometime even shows large columnar crystals and fan-like crystals, which makes deformation of ingots, difficult in processing, easy to crack, low yield, poor mechanical properties, and very low plastic deformation rate, which seriously affects the industrial production.
The grain refinement method of Mg—Al alloys mainly includes overheating method, rare earth element method and carbon inoculation method, etc.. Overheating method has some effect, but the melt oxidation is more serious, while the rare earth element method is neither stable nor ideal.
However, when such grain refiner is added, melt is easy to boil, so it is rarely used in the production.

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
  • Alloy for magnesium and magnesium alloy grain refinement and preparation method thereof
  • Alloy for magnesium and magnesium alloy grain refinement and preparation method thereof
  • Alloy for magnesium and magnesium alloy grain refinement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0032]Weigh 100 kg aluminum and put it in a reactor, heat it to 750, and add the mixture of 15.8 kg potassium fluozirconate and 11.58 kg potassium fluoborate to the reactor. After stirring 4 hours, extract the upper layer of molten liquid, to remain the lower layer of aluminum-zirconium-boron alloy of 94% Al-5% Zr-1% B. After deslagging and heat preservation, the resulting aluminum -zirconium-boron alloy can be directly rolled into wire rods with diameter of 9.5 mm in a way of continuous casting and rolling.

embodiment 2

[0033]Weigh 100 kg aluminum and put it in a reactor, heat it to 700, and add the mixture of 14 kg sodium fluozirconate and 10.1 kg sodium fluoborate to the reactor. After stirring 6 hours, extract the upper layer of molten liquid, to remain the lower layer of aluminum-zirconium-boron alloy of 94% Al-5% Zr-1% B. After deslagging and heat preservation, the resulting aluminum-zirconium-boron alloy can be directly used by casting molding.

embodiment 3

[0034]Weigh 100 kg aluminum and put it in a reactor, heat it to 800° C., and add the mixture of 32.23 kg potassium fluozirconate and 23.74 kg potassium fluoborate to the reactor. After stirring 6 hours, extract the upper layer of molten liquid, to remain the lower layer of aluminum-zirconium-boron alloy of 88% Al-10% Zr-2% B. After deslagging and heat preservation, the resulting aluminum-zirconium-boron alloy can be directly rolled into wire rods with diameter of 9.5 mm in a way of continuous casting and rolling.

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
diameteraaaaaaaaaa
widthaaaaaaaaaa
weightaaaaaaaaaa
Login to View More

Abstract

The present invention provides an alloy for magnesium and magnesium alloy grain refinement, and a preparation method thereof, the alloy as a grain refiner being an aluminum-zirconium-boron intermediate alloy comprising the following chemical compositions by weight percent: 5-20% of Zr, 0.5-4% of B, and the balance being Al. The invention can achieve the following technical effect: an intermediate alloy with strong nucleation capability and excellent capability of magnesium and magnesium alloy grain refinement is invented and its preparation method is provided. This kind of grain refiner can be applied to casting deformation plastic processing of magnesium and magnesium alloy profiles, with high degree of refinement, to promote the extensive industrial applications of magnesium.

Description

FIELD OF THE INVENTION[0001]The present invention relates to an intermediate alloy that improves the properties of metal and alloy, in particular, to a grain refiner of magnesium and magnesium alloy and its preparation method thereof.BACKGROUND OF THE INVENTION[0002]Magnesium and magnesium alloys are the lightest metal structural materials available now, which have such advantages as low density, high specific strength and specific stiffness, good damping resistance, good thermal conductivity, excellent electromagnetic shielding effect, excellent machining performance, stable part size and easy to recycle, etc.. Magnesium and magnesium alloys, especially wrought magnesium alloy have enormous application potential in transportation tools, engineering structure materials and electronics industries, etc.. Wrought magnesium alloys refer to those magnesium alloys that can be processed by plastic molding methods such as extrusion, rolling, forging, etc.. However, restricted by some factor...

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(United States)
IPC IPC(8): C22C21/00B22D11/116C22C23/00C22C1/02C22B9/00
CPCC22C21/00C22C1/02B22D11/116C22C23/00C22B9/00C22C1/06C22C1/03
Inventor CHEN, XUEMINYANG, JUNLI, ZHIHONGWU, WEIPINGWEI, SHIMING
Owner SHENZHEN SUNXING LIGHT ALLOYS MATERIALS CO LTD