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Preparation method for magnesium alloy

A magnesium alloy and intermediate alloy technology, applied in the field of improving its strength and toughness, improving magnesium alloy structure, new magnesium alloy materials and spray forming preparation, can solve the problems of high equipment requirements, difficult to control the preparation process, high production cost, etc., and achieve mechanical Excellent performance, improved strength and toughness, simultaneous improvement of strength and toughness

Inactive Publication Date: 2017-07-04
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A careful analysis of the invention patent shows that, in addition to the high production cost, the preparation process is complicated and difficult to control, and the equipment requirements are extremely high.

Method used

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  • Preparation method for magnesium alloy
  • Preparation method for magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] AZ31 magnesium alloy adopts the following preparation process:

[0015] (1) Preparation of magnesium alloy deposition billet by spray forming

[0016] First place the AZ31 magnesium alloy ingot in the smelting furnace, vacuum the induction furnace, wash the furnace with argon 3 times during this period, when the vacuum reaches 10Pa, fill the vacuum furnace with argon until the absolute value of the vacuum gauge scale is 0.03 When the smelting furnace is powered, the ingot is melted. After the alloy is melted and mixed evenly by electromagnetic stirring, the temperature is lowered to 750°C, poured into the tundish, and flowed out through the diversion nozzle. The high-pressure atomized gas N 2 Atomization, the atomized droplets are deposited on the receiving plate to form a columnar deposition blank. The ring-hole non-restricted atomizing nozzle is adopted, and the specific process parameters are as follows: the atomizing pressure is 0.55MPa, the outlet diameter of the ...

Embodiment 2

[0021] AZ91 magnesium alloy adopts the following preparation process:

[0022] (1) Preparation of magnesium alloy deposition billet by spray forming

[0023] First place the AZ91 magnesium alloy ingot in the smelting furnace, vacuum the induction furnace, wash the furnace 3 times with argon during this period, when the vacuum reaches 30Pa, fill the vacuum furnace with argon until the absolute value of the vacuum gauge scale is 0.03 When the smelting furnace is powered, the ingot is melted. After the alloy is melted and mixed evenly by electromagnetic stirring, it is cooled to 720°C, poured into the tundish, and flows out through the diversion nozzle. The high-pressure atomized gas N 2 Atomization, the atomized droplets are deposited on the receiving plate to form a columnar deposition blank. The ring-hole non-restricted atomizing nozzle is adopted, and the specific process parameters are as follows: the atomization pressure is 0.6MPa, the outlet diameter of the diversion nozz...

Embodiment 3

[0028] Mg-9.0wt.%Al-1.8wt.%Zn alloy adopts the following preparation process:

[0029] (1) Preparation of magnesium alloy deposition billet by spray forming

[0030] First place the AZ91 magnesium alloy ingot in the smelting furnace, vacuum the induction furnace, wash the furnace twice with argon during this period, and when the vacuum reaches 50Pa, fill the vacuum furnace with argon until the absolute value of the vacuum gauge scale is 0.04 At the same time, power is supplied to the melting furnace to melt the ingot. After the alloy is melted, other alloy ingredients (pure zinc block) are added to the melting furnace through the feeding device equipped with the vacuum furnace. Pour into the tundish, flow out through the diversion nozzle, high-pressure atomizing gas N 2 Atomization, the atomized droplets are deposited on the receiving plate to form a columnar deposition blank. The ring-hole non-restricted atomizing nozzle is used, and the specific process parameters are as f...

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Abstract

The invention relates to the spray deposition preparation process, and discloses a preparation method of high-toughness magnesium alloy. According to the preparation method, a spray forming technology in the protective atmosphere is adopted, so that the problems of volatilization, oxidation, safety and the like of the magnesium alloy are solved, and the mechanical property and the plasticity and toughness of the magnesium alloy are synchronously improved. The method comprises the following steps: firstly, putting an alloy ingot into a smelting furnace, extracting the furnace to a vacuum state, carrying out argon gas slugging for 2-3 times, filling the furnace with argon gas when the vacuum degree is 10-70 Pa until the pressure is slightly lower than the atmospheric pressure of the exterior, melting the ingot, electromagnetically stirring and evenly mixing the melted ingot, then pouring the melted ingot into a tundish when the melt temperature is 700-770 DEG C, making the melted ingot flow out through a flow guide nozzle, atomizing the melted ingot, and finally depositing atomized liquid drops on a receiving pole plate to form columnar magnesium alloy deposition blanks, wherein the annular hole type non-limiting type atomizing nozzle is adopted, high-pressure atomization N2 gas is adopted, and the atomization pressure is 0.5-0.6 MPa. The strength and the toughness of the prepared magnesium alloy are both high and are synchronously improved.

Description

technical field [0001] The invention relates to a new magnesium alloy material and a spray forming preparation process, provides a new method for improving the magnesium alloy structure and improving its strength and toughness, and relates to the technical fields of metal materials and plastic processing. Background technique [0002] With the deepening of the application of magnesium alloys in the fields of aviation, aerospace, shipbuilding, transportation, military industry and high-tech industries, the requirements for the performance of magnesium alloys are getting higher and higher. How to improve the comprehensive performance of magnesium alloys to meet the use of structural materials Requirements become the focus and difficulty of current magnesium alloy research. Taking the most widely used Mg-Al-Zn alloy in industry as an example, under the traditional ingot metallurgy (IM) process conditions, due to unbalanced crystallization, brittle Mg 17 Al 12 Intermetallic co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03B22F3/115C22C23/00
Inventor 李永兵张济山姜肇理于建胜邸伟杨蕾
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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