A kind of ti-zr-re-mg rare earth magnesium alloy grain refiner and preparation method thereof

A ti-zr-re-mg, grain refiner technology, applied in the field of Ti-Zr-RE-Mg rare earth magnesium alloy grain refiner and its preparation, can solve the problem of affecting the structure and performance of alloys or castings Batch stability, no better, exacerbated problems, etc., to achieve excellent grain refinement ability, improve refinement effect, uniform and fine size effect

Active Publication Date: 2022-06-03
SHANGHAI SPACE PRECISION MACHINERY RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The smelting process of rare earth magnesium alloy is complex, with many procedures and long time. When the traditional Mg-Zr master alloy is used as the grain refiner, the Zr subsidence is serious, the yield is low, the purification treatment is difficult and the refining effect is unstable, which seriously affects the Microstructure and properties of alloys or castings and product batch stability
As the amount of smelting increases, this problem will be further exacerbated, and there is still no better solution

Method used

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  • A kind of ti-zr-re-mg rare earth magnesium alloy grain refiner and preparation method thereof
  • A kind of ti-zr-re-mg rare earth magnesium alloy grain refiner and preparation method thereof
  • A kind of ti-zr-re-mg rare earth magnesium alloy grain refiner and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of Ti-Zr-RE-Mg grain refiner for refining WE43B magnesium alloy:

[0035] S1, using pure Ti and pure Zr rods as raw materials, preparing the charge according to the mass ratio of 3:2, and using the method of electrode induction melting inert gas atomization to prepare uniformly mixed high-purity Ti-Zr metal powder;

[0036]S2, after crushing pure rare earth Y and pure Mg with a jaw crusher and a ball mill, Y-Mg powder is obtained, and under argon protection, the Y-Mg powder and high-purity Ti-Zr metal powder are combined 1:1 mass ratio immersed in absolute ethanol in a high-energy ball mill jar. Add zirconia ceramic balls, and the ball-to-material ratio is 10:3 (mass ratio); close the ball mill jar. Introduced into argon protective atmosphere, ball milled for 24 hours at a speed of 750 rpm, and the whole process ensures that the tank cooling system always works normally. Transfer the tank to a protective atmosphere, extract the slurry containing Y-Mg powde...

Embodiment 2

[0040] Preparation of Ti-Zr-RE-Mg grain refiner for refining ZM6 magnesium alloy casing:

[0041] S1, using pure Ti and pure Zr rods as raw materials, preparing the charge according to the mass ratio of 4:3, and using the method of electrode induction melting inert gas atomization to prepare uniformly mixed high-purity Ti-Zr metal powder;

[0042] S2, after crushing pure rare earth Nd and pure Mg with jaw crusher and ball mill, Nd-Mg powder is obtained. Under argon protection, the Nd-Mg powder and high-purity Ti-Zr metal powder are mixed according to The mass ratio of 4:3 is immersed in absolute ethanol in a high-energy ball mill jar. Add zirconia ceramic balls, and the ball-to-material ratio is 10:3 (mass ratio); close the ball mill jar. Introduce argon protective atmosphere, and ball mill for 36h under the condition of rotating speed 500r / min. The whole process ensures that the cooling system of the tank always works normally. Transfer the tank to a protective atmosphere, ...

Embodiment 3

[0046] Grain refiner for a cabin casting of Mg-12Gd-3Y-0.5Zn(VW123Z) magnesium alloy:

[0047] S1, using pure Ti and pure Zr rods as raw materials, preparing the charge according to the mass ratio of 3:5, and using the method of electrode induction melting inert gas atomization to prepare uniformly mixed high-purity Ti-Zr metal powder;

[0048] S2, pure rare earth particles, pure Mg and high-purity Ti-Zr metal powder are immersed in absolute ethanol in a high-energy ball mill in a mass ratio of 3:5. Add zirconia ceramic balls, and the ball-to-material ratio is 10:3 (mass ratio); close the ball mill jar. Introduce argon protective atmosphere, and ball mill for 20h under the condition of rotating speed 800r / min. The whole process ensures that the cooling system of the tank always works normally. Transfer the tank to a protective atmosphere, extract the slurry containing pure RE and Ti-Zr metal powder by filtration, dry and sieve it in an argon protective atmosphere, and store i...

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Abstract

The invention discloses a method for refining grains of a magnesium alloy using a Ti-Zr-RE-Mg melt, and belongs to the technical field of magnesium alloys. Its preparation method is to use pure Ti and pure Zr as raw materials to prepare high-purity Ti-Zr metal powder through vacuum induction melting, electromagnetic stirring and gas atomization, and mix the prefabricated block with the pre-broken rare earth pure metal RE or Mg-RE. The alloy is subjected to high-energy ball milling treatment under certain protection conditions, the powder is obtained by filtration and drying, and then the powder is compacted to obtain a Ti-Zr-RE-Mg rare earth magnesium alloy grain refiner. The grain refiner of the present invention has small size, uniform distribution, high refinement efficiency, stable effect, low content of impurity elements, and no inclusions such as metal and non-metal oxides. The grain refiner has a wide range of applications, It has the advantages of not destroying the purity of the melt, and can be coupled with physical refinement methods to refine grains. It has the advantages of low cost, simple operation, and easy control during use. It can be used to prepare magnesium alloys with excellent performance under industrial production conditions.

Description

technical field [0001] Aiming at the technical problems of Zr sedimentation and low yield in the Mg-Zr master alloy in the rare earth magnesium alloy smelting process, the invention adopts the non-equilibrium solidification and the powder metallurgy technology based on the alloy phase diagram, combined with the alloy strengthening and toughening design. A high-efficiency and pollution-free grain refiner for rare earth magnesium alloys has been invented, which has the advantages of high efficiency, low dosage, wide application range, no additional rare earth loss, and no increase in the difficulty of melt purification. Scientific research needs, and can be applied to industrial production, belonging to the technical field of metal materials and metallurgy. Background technique [0002] Magnesium and magnesium alloys have significant advantages such as low density, high specific strength and specific stiffness, and low raw material prices. They have received more and more atte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C1/03C22C1/04B22F3/16B22F9/04B22F9/08
CPCC22C23/06C22C1/03C22C1/0408B22F3/16B22F9/082B22F9/04B22F2009/043Y02P10/25
Inventor 候正全陈斌肖旅庞松周海涛董喜旺陈舸李宝辉邹文兵袁勇
Owner SHANGHAI SPACE PRECISION MACHINERY RES INST
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