Preparation method of semisolid-state AZ61 magnesium alloy

A technology of AZ61 and magnesium alloy, which is applied in the field of preparation of semi-solid alloy slurry, can solve the problems of high temperature strength, low creep performance, poor corrosion resistance of magnesium alloy, and difficult production of magnesium alloy, and achieve the improvement of mechanical properties and distribution uniform effect

Inactive Publication Date: 2010-01-13
NANCHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the extremely active magnesium element, magnesium alloys are extremely easy to oxidize and burn during smelting and processing. Therefore, the production of magnesium alloys is very difficult; the corrosion resistance of magnesium alloys is poor; the high temperature strength and creep properties of existing industrial magnesium alloys Low, which limits the application of magnesium alloys in high temperature (150-350°C) occasions
The production technology of magnesium alloy is not yet mature and perfect, especially the forming technology of magnesium alloy needs to be further developed

Method used

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  • Preparation method of semisolid-state AZ61 magnesium alloy
  • Preparation method of semisolid-state AZ61 magnesium alloy
  • Preparation method of semisolid-state AZ61 magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Put the raw material AZ61 magnesium alloy into the melting furnace, heat and refine under the protection of covering flux, let stand, and then cool down to the liquidus temperature (620°C). Then pour the liquid magnesium alloy into an argon-protected stirring furnace, and stir at a stirring speed of 500r / min for 3 minutes while cooling down to lower the temperature of the liquid magnesium alloy to 600°C to obtain a semi-solid slurry for pouring. Its organizational structure is that the white and nearly round particles are the semi-solid solid phase, and the light black is the dendrite structure after the liquid phase in the semi-solid slurry is partially solidified, and the spherical grains are relatively small, round and evenly distributed.

Embodiment 2

[0024] Put the raw material AZ61 magnesium alloy into the melting furnace, heat and refine under the protection of covering flux, let stand, and then cool down to the liquidus temperature (620°C). Then pour the liquid magnesium alloy into an argon-protected stirring furnace, and stir at a stirring speed of 500r / min for 5 minutes while cooling down to lower the temperature of the liquid magnesium alloy to 600°C to obtain a semi-solid slurry for pouring. Its organizational structure is that the white and nearly round particles are the semi-solid solid phase, and the light black is the dendrite structure after the liquid phase in the semi-solid slurry is partially solidified, and the spherical grains are relatively small, round and evenly distributed.

Embodiment 3

[0026] Put the raw material AZ61 magnesium alloy into the melting furnace, heat and refine under the protection of covering flux, let stand, and then cool down to the liquidus temperature (620°C). Then pour the liquid magnesium alloy into an argon-protected stirring furnace, and stir for 3 minutes while cooling at a stirring speed of 500 r / min, so that the temperature of the liquid magnesium alloy drops to 605° C. to obtain a semi-solid slurry and pour it. Its organizational structure is that the white and nearly round particles are the semi-solid solid phase, and the light black is the dendrite structure after the liquid phase in the semi-solid slurry is partially solidified, and the spherical grains are relatively small, round and evenly distributed.

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Abstract

The invention discloses a preparation method of a semisolid-state AZ61 magnesium alloy, which is characterized by comprising the following steps: firstly placing AZ61 magnesium alloy into a melting furnace, heating, refining and standing under protection of covering flux, and then cooling to liquidus temperature; then pouring liquid magnesium alloy into an argon protection stirring furnace to be stirred for 3 min to 5 min when being cooled with the stirring speed of 300 to 600 r / min until temperature of the liquid magnesium alloy is lowered to 595 DEG C to 610 DEG C; and pouring the liquid magnesium alloy. The invention can obtain fine, round, even and uniformly distributed semisolid spherical particles, and the mechanical performance of a semisolid structure thereof is greatly enhanced compared with a conventional cast structure.

Description

technical field [0001] The invention belongs to the field of metal material preparation, in particular to the preparation of semi-solid alloy slurry. Background technique [0002] Magnesium alloy has good vibration absorption and radiation absorption, light weight, high specific strength and high specific elastic modulus, good rigidity, machinability and dimensional stability, excellent electrical conductivity, thermal conductivity and magnetic shielding , has excellent cutting and polishing performance, easy casting and secondary use, and can prolong the service life of die casting. At the same time, magnesium alloy is harmless to the environment and is considered by the world as a green and environmentally friendly material in the 21st century. Due to the extremely active magnesium element, magnesium alloys are extremely easy to oxidize and burn during smelting and processing. Therefore, the production of magnesium alloys is very difficult; the corrosion resistance of mag...

Claims

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Application Information

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IPC IPC(8): B22D21/04C22C1/06
Inventor 闫洪周冰锋
Owner NANCHANG UNIV
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