Magnesium and magnesium alloy grain refining method

A technology of grain refinement and magnesium alloy, which is applied in the field of metal materials, can solve the problems that cannot be used as α-Mg heterogeneous nucleation core, large difference in lattice parameters, and different crystal structures, etc., to achieve the effect of grain refinement Significant, small fading effect, short processing time

Inactive Publication Date: 2018-12-21
北京科技大学广州新材料研究院
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The crystal structures of the two are completely different, and the lattice parameters are quite different, so it is said that Al 3 Zr cannot serve as a good heterogeneous nucleation core for α-Mg
Meanwhile, Al 3 The formation of Zr also leads to the loss of Al element in the alloy

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
  • Magnesium and magnesium alloy grain refining method
  • Magnesium and magnesium alloy grain refining method
  • Magnesium and magnesium alloy grain refining method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: Grain refinement treatment of pure magnesium

[0030] Using amorphous alloy to refine pure Mg, the implementation process is as follows:

[0031] 1. Preparation of intermediate carrier containing zirconium-based amorphous alloy.

[0032] In order to add zirconium-based amorphous alloy into Mg melt conveniently, safely and effectively, firstly, zirconium-based amorphous alloy and magnesium chips are mixed and pressed to form an intermediate carrier containing zirconium-based amorphous alloy.

[0033] The preparation method is as follows: cutting the long zirconium-based amorphous alloy into smaller fragments. In addition, magnesium shavings obtained from cutting are collected. Mix magnesium chips and zirconium-based amorphous alloy fragments uniformly at a mass ratio of 7:3, press at room temperature under a pressure of 120MPa to form a Φ30mm round cake, and obtain a zirconium-based amorphous intermediate carrier.

[0034] 2. Alloy melting and refining t...

Embodiment 2

[0038] Embodiment 2: Grain refinement treatment method of AZ31B magnesium alloy

[0039] This embodiment 2 is used to illustrate the refinement effect of zirconium-based amorphous alloy on AZ31B magnesium alloy. The preparation process of the intermediate carrier containing zirconium-based amorphous is the same as in Example 1, wherein the magnesium chips and zirconium-based amorphous alloy fragments are pressed by 6 : 4 mass ratio, mixed evenly, pressed at room temperature under 120MPa pressure into a round cake shape of Φ30mm to obtain a zirconium-based amorphous intermediate carrier.

[0040] Melting AZ31B magnesium alloy, the melting temperature is 760°C. After melting, an intermediate carrier containing zirconium-based amorphous alloy is added, and the added amount of zirconium-based amorphous alloy is controlled to be 0.5% of the mass of the melt. Use N 2 +0.5% SF 6 The mixed gas protects the melt, and the melt is manually stirred for about 1 minute. After stirring, i...

Embodiment 3

[0042] Embodiment 3: Grain refinement treatment method of AZ31B magnesium alloy

[0043] This Example 3 is used to illustrate the refining effect of the zirconium-based amorphous on the AZ31B magnesium alloy, and the preparation process of the intermediate carrier containing the zirconium-based amorphous is the same as that in Example 1.

[0044] Melting AZ31B magnesium alloy, the melting temperature is 760°C. After melting, an intermediate carrier containing zirconium-based amorphous alloy is added, and the added amount of zirconium-based amorphous alloy is controlled to be 1.0% of the mass of the melt. Use N2 + 0.5% SF6 mixed gas to protect the melt, manually stir the melt for about 1 minute, let it stand for 10 minutes after stirring, pull the slag out of the furnace and cast it. The casting mold is made of carbon steel, and the mold preheating temperature is 500°C.

[0045] Figure 7 Shown is the microstructure photo of AZ31B magnesium alloy after refinement, and its gr...

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
crystal sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a magnesium and magnesium alloy grain refining method. The magnesium and magnesium alloy grain refining method comprises the following steps that an intermediate carrier containing a zirconium-based amorphous alloy is prepared, the long-strip-shaped zirconium-based amorphous alloy is shorn into small fragments, in addition, an alloy cutting machine is used for cutting a high-purity magnesium ingot into small magnesium alloy pieces, magnesium scraps generated during cutting are collected and cleaned through absolute ethyl alcohol after collection, the magnesium scraps are placed at the shade place to be dried in the shade, and by mass percent, 20%-40% of the zirconium-based amorphous alloy fragments and 60%-80% of magnesium cuttings are pressed and formed after beingsufficiently mixed; secondly, Mg or the Mg alloy is melted, the intermediate carrier containing the zirconium-based amorphous alloy is added, and stirring is conducted; and thirdly, after standing and heat preservation are conducted, furnace discharging and casting are conducted. Under the conditions that the grain refining method is low in cost, and the technology is simple, the advantages thatthe adding amount is easy to control, pollutant discharging is avoided, the grain refining efficiency is high, the grain refining effect is stable, and the treatment time is short are achieved.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a method for refining the grains of magnesium and magnesium alloys, which can effectively refine the magnesium and magnesium alloys. Background technique [0002] Magnesium alloys are currently the most attractive and promising metal structural materials due to their remarkable low density and high specific strength. The advantages of magnesium alloy are very prominent. In addition to light weight, high specific strength and high specific stiffness, it also has excellent damping and vibration reduction performance, electromagnetic shielding performance and cutting performance. It is known as "the green engineering material of the 21st century". Pure magnesium has a hexagonal structure, its shape is poor at room temperature, its dislocation strengthening effect is small, and its absolute strength is relatively low, which restricts the development and large-scale application of magne...

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): C22C1/03C22C1/06C22C23/00
CPCC22C1/03C22C1/06C22C23/00
Inventor 何新波张涛许德英
Owner 北京科技大学广州新材料研究院
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