A kind of refining agent for magnesium and magnesium alloy and preparation method thereof

Abstract

The invention relates to a refining agent for magnesium and magnesium alloys and a preparation method thereof. The refining agent is one or more of limestone, dolomite and magnesite and magnesium chloride, potassium chloride, barium chloride, fluorine Calcium chloride, fluorite and borax are mixed, and its mass percentage is: 35.0-60.0% of one or more of limestone, dolomite and magnesite, 18.0-28.0% magnesium chloride, 16.0-24.0% potassium chloride , 2.0% ~ 4.0% barium chloride, 1.0 ~ 3.0% calcium fluoride, 2.0 ~ 5.0% fluorite powder, 0.0 ~ 1.5% borax. The raw materials of the refiner are convenient and easy to obtain, the production process is simple, the cost is low, the addition is convenient, the anti-aging life is long, and the refinement efficiency is high and stable.

Description

technical field

[0001] The invention belongs to the technical field of metal materials and metallurgy, and in particular relates to a refiner for magnesium and magnesium alloys and a preparation method thereof. Background technique

[0002] Magnesium alloys are widely used in automobiles, communication equipment and It has broad application prospects in the electronics industry. However, the performance of magnesium alloys is relatively low and the formability is poor, which limits the application of magnesium alloys. Grain refinement, as an important means to improve the comprehensive properties of magnesium alloys and improve the formability of magnesium alloys, has been widely concerned and highly valued by people. The influence of grain refinement on the properties of magnesium alloys is mainly reflected in the following aspects: (1) Since magnesium alloys have a close-packed hexagonal crystal structure, there are only three independent slip systems at room temperature...

Examples

Embodiment 1

[0017] The composition of the refining agent and the mass percentages of its components are: 50.0% limestone, 24.0% magnesium chloride, 19.0% potassium chloride, 2.0% barium chloride, 1.5% calcium fluoride, 3.0% fluorite, 0.5% borax.

[0018] Weigh limestone, magnesium chloride, potassium chloride, barium chloride, calcium fluoride, fluorite, and borax according to the above ratio; use a crusher to crush the limestone, fluorite, and borax, and then use a No. 30 sieve to sieve ;Put the crushed limestone, fluorite and borax together with magnesium chloride, potassium chloride, barium chloride and calcium fluoride in a drying oven for baking at 150°C for 1 hour; Magnesium chloride, potassium chloride, barium chloride, and calcium fluoride were melted in a crucible preheated to 500°C. After they were all melted, they were stirred for 20 minutes, then the temperature was raised to 800°C and stirred for 20 minutes, and then poured into the mold after 30 minutes of heat preservation....

Embodiment 2

[0021] The composition of the refining agent and the mass percentages of its components are: 42.0% limestone, 27.0% magnesium chloride, 22.0% potassium chloride, 3.0% barium chloride, 2.0% calcium fluoride, 3.5% fluorite, 0.5% borax.

[0022] Weigh limestone, magnesium chloride, potassium chloride, barium chloride, calcium fluoride, fluorite, and borax according to the above ratio; use a crusher to crush the limestone, fluorite, and borax, and then use a No. 30 sieve to sieve ;Put the crushed limestone, fluorite and borax together with magnesium chloride, potassium chloride, barium chloride and calcium fluoride in a drying oven for baking at 120°C for 2 hours; Put the magnesium chloride, potassium chloride, barium chloride, and calcium fluoride in a crucible preheated to 600°C for melting. After they are all melted, stir for 10 minutes, then let the temperature rise to 800°C and stir for 20 minutes, keep warm for 30 minutes, and then pour into the mold Cool and solidify into ...

Embodiment 3

[0025] The composition of the refining agent and the mass percentage of each component are: 60.0% dolomite, 18.0% magnesium chloride, 16.0% potassium chloride, 2.0% barium chloride, 1.0% calcium fluoride, 2.0% fluorite , 1.0% borax.

[0026] Weigh dolomite, magnesium chloride, potassium chloride, barium chloride, calcium fluoride, fluorite, and borax according to the above ratio; and use a pulverizer to crush dolomite, fluorite, and borax, and then use a No. 40 sieve to Screening; the pulverized dolomite, fluorite and borax and magnesium chloride, potassium chloride, barium chloride and calcium fluoride are put into a drying oven for baking at a temperature of 150°C for 2 hours; The baked magnesium chloride, potassium chloride, barium chloride, and calcium fluoride are melted in a crucible preheated to 550°C. After they are all melted, stir for 15 minutes, then let stand and heat up to 805°C, stir for 20 minutes, and keep warm for 40 minutes. Pour into a mold to cool and solidi...

technical field

[0001] The invention belongs to the technical field of metal materials and metallurgy, and in particular relates to a refiner for magnesium and magnesium alloys and a preparation method thereof. Background technique

[0002] Magnesium alloys are widely used in automobiles, communication equipment and It has broad application prospects in the electronics industry. However, the performance of magnesium alloys is relatively low and the formability is poor, which limits the application of magnesium alloys. Grain refinement, as an important means to improve the comprehensive properties of magnesium alloys and improve the formability of magnesium alloys, has been widely concerned and highly valued by people. The influence of grain refinement on the properties of magnesium alloys is mainly reflected in the following aspects: (1) Since magnesium alloys have a close-packed hexagonal crystal structure, there are only three independent slip systems at room temperature...

Examples

Embodiment 1

[0017] The composition of the refining agent and the mass percentages of its components are: 50.0% limestone, 24.0% magnesium chloride, 19.0% potassium chloride, 2.0% barium chloride, 1.5% calcium fluoride, 3.0% fluorite, 0.5% borax.

[0018] Weigh limestone, magnesium chloride, potassium chloride, barium chloride, calcium fluoride, fluorite, and borax according to the above ratio; use a crusher to crush the limestone, fluorite, and borax, and then use a No. 30 sieve to sieve ;Put the crushed limestone, fluorite and borax together with magnesium chloride, potassium chloride, barium chloride and calcium fluoride in a drying oven for baking at 150°C for 1 hour; Magnesium chloride, potassium chloride, barium chloride, and calcium fluoride were melted in a crucible preheated to 500°C. After they were all melted, they were stirred for 20 minutes, then the temperature was raised to 800°C and stirred for 20 minutes, and then poured into the mold after 30 minutes of heat preservation....

Embodiment 2

[0021] The composition of the refining agent and the mass percentages of its components are: 42.0% limestone, 27.0% magnesium chloride, 22.0% potassium chloride, 3.0% barium chloride, 2.0% calcium fluoride, 3.5% fluorite, 0.5% borax.

[0022] Weigh limestone, magnesium chloride, potassium chloride, barium chloride, calcium fluoride, fluorite, and borax according to the above ratio; use a crusher to crush the limestone, fluorite, and borax, and then use a No. 30 sieve to sieve ;Put the crushed limestone, fluorite and borax together with magnesium chloride, potassium chloride, barium chloride and calcium fluoride in a drying oven for baking at 120°C for 2 hours; Put the magnesium chloride, potassium chloride, barium chloride, and calcium fluoride in a crucible preheated to 600°C for melting. After they are all melted, stir for 10 minutes, then let the temperature rise to 800°C and stir for 20 minutes, keep warm for 30 minutes, and then pour into the mold Cool and solidify into ...

Embodiment 3

[0025] The composition of the refining agent and the mass percentage of each component are: 60.0% dolomite, 18.0% magnesium chloride, 16.0% potassium chloride, 2.0% barium chloride, 1.0% calcium fluoride, 2.0% fluorite , 1.0% borax.

[0026] Weigh dolomite, magnesium chloride, potassium chloride, barium chloride, calcium fluoride, fluorite, and borax according to the above ratio; and use a pulverizer to crush dolomite, fluorite, and borax, and then use a No. 40 sieve to Screening; the pulverized dolomite, fluorite and borax and magnesium chloride, potassium chloride, barium chloride and calcium fluoride are put into a drying oven for baking at a temperature of 150°C for 2 hours; The baked magnesium chloride, potassium chloride, barium chloride, and calcium fluoride are melted in a crucible preheated to 550°C. After they are all melted, stir for 15 minutes, then let stand and heat up to 805°C, stir for 20 minutes, and keep warm for 40 minutes. Pour into a mold to cool and solidi...