Al-Co grain refiner of Mg-Al-based alloy, preparation method and using method thereof

A technology of grain refiner and base alloy, applied in the field of grain refiner and its preparation, can solve the problems of complex preparation process of grain refiner, and achieve easy control of refining effect, easy control of addition amount, Preparation method and simple effect of using method

Inactive Publication Date: 2010-04-14
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of complex preparation process of the existing Mg-Al-based alloy grain refiner, the present invention provides an Al-Co grain refiner for Mg-Al-based alloy and its preparation method and use method

Method used

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  • Al-Co grain refiner of Mg-Al-based alloy, preparation method and using method thereof
  • Al-Co grain refiner of Mg-Al-based alloy, preparation method and using method thereof
  • Al-Co grain refiner of Mg-Al-based alloy, preparation method and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Metal aluminum and metal cobalt are mixed and batched, wherein the metal aluminum accounts for 30% of the mixed material by weight percentage, and the metal cobalt accounts for 70% of the mixed material by weight percentage to obtain the mixed metal.

[0029] The mixed metal is cleaned with an organic solvent under ultrasonic conditions with a frequency of 40KHz, and the cleaning time is 3 minutes, and the organic solvent is ethanol.

[0030] Put the cleaned mixed metal in the electric arc furnace, evacuate the electric arc furnace, and then fill it with argon until the air pressure in the electric arc furnace is 0.02MPa; the electric arc furnace is evacuated until the air pressure is 1×10 -3 MPa.

[0031] The mixed metal is smelted, the voltage applied during smelting is 45V, the current is 200A, the smelting time is 2min, and the smelting is repeated four times according to the above method; then physically broken into particles with a particle size of 25-35μm to obta...

Embodiment 2

[0038] Metal aluminum and metal cobalt are mixed and batched, wherein the metal aluminum accounts for 20% of the mixed material by weight percentage, and the metal cobalt accounts for 80% of the mixed material by weight percentage to obtain the mixed metal.

[0039] The mixed metal is cleaned with an organic solvent under ultrasonic conditions with a frequency of 60KHz, and the cleaning time is 5 minutes, and the organic solvent is ethanol.

[0040] Put the cleaned mixed metal in the electric arc furnace, evacuate the electric arc furnace, and then fill it with argon until the air pressure in the electric arc furnace is 0.04MPa; the electric arc furnace is evacuated until the air pressure is 5×10 -3 MPa.

[0041] The mixed metal is smelted, the voltage applied during smelting is 30V, the current is 270A, and the smelting time is 3min. Repeat the smelting four times according to the above method; then physically break into particles with a particle size of 25-35μm to obtain Al-...

Embodiment 3

[0046] Metal aluminum and metal cobalt are mixed and batched, wherein the metal aluminum accounts for 34% of the mixed material by weight percentage, and the metal cobalt accounts for 66% of the mixed material by weight percentage to obtain the mixed metal.

[0047] The mixed metal is cleaned with an organic solvent under ultrasonic conditions with a frequency of 50KHz, and the cleaning time is 4 minutes, and the organic solvent is acetone.

[0048] Put the cleaned mixed metal in the electric arc furnace, evacuate the electric arc furnace, and then fill it with argon until the air pressure in the electric arc furnace is 0.03MPa; the electric arc furnace is evacuated until the air pressure is 3×10 -3 MPa.

[0049] The mixed metal is smelted. The voltage applied during smelting is 20V, the current is 350A, and the smelting time is 2.5min. Repeat the smelting four times according to the above method; then physically break it into particles with a particle size of 25-35μm, and obt...

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Abstract

The invention relates to an Al-Co grain refiner of Mg-Al-based alloy, a preparation method and a using method thereof. The refiner comprises the components by weight percent: 20-34% of Al and 66-80% of Co which have the grain diameter of 25-35mu m. The preparation method comprises the following steps: (1) blending according to the weight percent of the components of the Al-Co grain refiner: 20-34% of Al and 66-80% of Co, and obtaining mixed metal; (2) washing the mixed metal; and (3) putting the washed mixed metal into an electric arc furnace, vacuumizing and filling argon gas into the electric arc furnace for smelting for four times, and finally crushing into grains with the grain diameter of 25-35mu m by a physical method. The preparation method and the using method of the Al-Co grain refiner of the Mg-Al-based alloy are simple, and the volume of addition and the refining effect of the Al-Co grain refiner are easily controlled, so that the aim of very good refining can be achieved by adding trace of the Al-Co grain refiner, and the refining effect does not fade within 1h.

Description

technical field [0001] The invention relates to a grain refiner, a preparation method and a use method thereof, in particular to an aluminum-cobalt grain refiner for a Mg-Al based alloy, a preparation method and a use method thereof. Background technique [0002] Although magnesium alloys have broad application prospects in the fields of transportation, aerospace and communication, but to expand the application range of magnesium alloys, the existing problems of magnesium and its alloys must be solved. The matrix of magnesium and its alloys has a close-packed hexagonal structure, and there is only one basal slip system at room temperature. The deformability at room temperature is poor, and it is difficult to process and form; the chemical properties of magnesium are active, and the standard electrode potential is very low, so the formed natural oxide film is not dense enough. Therefore, the corrosion resistance of magnesium alloy is very poor; the room temperature strength o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C19/07C22C1/02C22C21/06C22C23/02C22C30/00
Inventor 秦高梧任玉平裴文利郝士明蒋敏李洪晓左良
Owner NORTHEASTERN UNIV
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