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A kind of ti-zr-b grain refiner and its preparation method and application in magnesium alloy

A technology of grain refiner and magnesium alloy, which is applied in the field of metal materials and magnesium alloy grain refinement, can solve the problems of difficult Ti engineering application and low solubility, and achieve uniform microstructure distribution and increased nucleation rate , Improve the effect of grain refinement

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

AI Technical Summary

Problems solved by technology

However, although Ti has a strong grain refinement effect on magnesium alloys, it is currently difficult to achieve Ti as a grain refiner because the melting point of Ti is much higher than the boiling point of Mg and the solubility of Ti in magnesium is very low. Engineering Application of Agents in Magnesium Alloy

Method used

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  • A kind of ti-zr-b grain refiner and its preparation method and application in magnesium alloy
  • A kind of ti-zr-b grain refiner and its preparation method and application in magnesium alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The preparation method of the Ti-Zr-B grain refiner whose mass percentage Ti content is 24% and B content is 22% is as follows:

[0033] 1. Select titanium powder and zirconium powder with a particle size of ≤50 microns, and boron powder with a particle size of ≤5 microns as raw materials. After removing the surface oxide scale by a combination of chemical methods and ultrasonic methods, titanium powder, boron powder and zirconium powder Put it into the container in a mass ratio of 24:22:54, add grinding balls, the weight ratio of balls to material is 30:1, seal the container, vacuumize it, and then fill it with high-purity argon gas. Put the sealed container containing the grinding ball into a liquid nitrogen vessel and cool it to -150°C, quickly put it into a planetary ball mill and mix it evenly for 30 minutes. Immerse the container in a liquid nitrogen tank and cool it to -150°C. Repeatedly, the ball mill The rotating speed is 200rpm, and the ball milling time is 4h...

Embodiment 2

[0039] The preparation method of the Ti-Zr-B grain refiner whose mass percentage Ti content is 12% and B content is 19% is as follows:

[0040] 1. Select titanium powder and zirconium powder with a particle size of ≤50 microns, and boron powder with a particle size of ≤5 microns as raw materials. After removing the surface oxide scale by a combination of chemical methods and ultrasonic methods, titanium powder, boron powder and zirconium powder Put it into the container according to the mass ratio of 12:19:69, add grinding balls, the weight ratio of balls to material is 50:1, seal the container, vacuumize it, and then fill it with high-purity argon gas. Put the sealed container containing the grinding balls into a liquid nitrogen vessel and cool to -160°C. Quickly put it into a planetary ball mill and mix evenly for 40 minutes. Immerse the container in a liquid nitrogen tank and cool it to -160°C. Repeatedly, the ball mill The rotating speed is 250rpm, and the ball milling tim...

Embodiment 3

[0046] The preparation method of the Ti-Zr-B grain refiner whose mass percentage Ti content is 25% and B content is 15% is as follows:

[0047] 1. Select titanium powder and zirconium powder with a particle size of ≤50 microns, and boron powder with a particle size of ≤5 microns as raw materials. After removing the surface oxide scale by a combination of chemical methods and ultrasonic methods, titanium powder, boron powder and zirconium powder Put it into the container according to the mass ratio of 25:15:60, add grinding balls, the weight ratio of balls to material is 40:1, seal the container, vacuumize, and then fill with high-purity argon. Put the sealed container containing the grinding ball into a liquid nitrogen vessel and cool it to -140°C, quickly put it into a planetary ball mill and mix evenly for 45 minutes. Immerse the container in a liquid nitrogen tank and cool it to -140°C. Repeatedly, the ball mill The rotating speed is 180rpm, and the ball milling time is 4.5...

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Abstract

The invention relates to a Ti-Zr-B grain refiner and its preparation method and application in magnesium alloys. The preparation method comprises: mixing titanium, zirconium and boron-containing substances to make titanium, zirconium and boron elements According to the corresponding ratio, the mixed powder is low-temperature high-energy ball milled, the mixed powder is cold-pressed, degassed and vacuumized, then hot-pressed and sintered, and the Ti-Zr-B master alloy is obtained after cooling to room temperature with the furnace. The grain refiner of the present invention is based on Zr-Ti infinite mutual solubility, and at the same time, with the help of the third component medium of B, the solubility of Ti and Zr in magnesium alloys is increased, so that it has a high degree of refinement when applied in magnesium alloys , stable effect, wide application range, no damage to the purity of the melt, can be combined with physical refinement methods to couple and refine grains, etc., has the advantages of low cost, simple operation, and easy control during use, and can be used in industrial production conditions Preparation of magnesium alloys with excellent properties.

Description

technical field [0001] The invention relates to a Ti-Zr-B grain refiner, its preparation method and application in magnesium alloys, belonging to the technical field of metal materials, in particular to the technical field of magnesium alloy grain refinement. Background technique [0002] Magnesium alloys are the most potential high-performance structural materials among light alloy materials due to their low density, good damping and shock absorption, and biocompatibility. Magnesium alloy is a close-packed hexagonal structure, with few independent slip systems at room temperature, and poor plastic deformation ability. At the same time, magnesium alloy has a wide crystallization temperature range, low thermal conductivity, large volume shrinkage, serious grain coarsening tendency, and solidification. Defects such as shrinkage porosity and thermal cracking are easy to occur in the process; fine grains help to reduce shrinkage porosity, reduce the size of the second phase, imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/06C22C1/05B22F9/04B22F3/14C22C16/00C22C14/00C22C1/03C22C23/06
CPCC22C1/06C22C1/05B22F9/04B22F3/14C22C16/00C22C14/00C22C1/03B22F2009/043C22C23/06
Inventor 董喜旺刁威孙京丽陈舸庞松周海涛肖旅陈斌戴铮罗志强
Owner SHANGHAI SPACE PRECISION MACHINERY RES INST
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