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Method for preparing magnesium alloy ingot and solidification system

A magnesium alloy and ingot casting technology, which is applied in the field of magnesium alloy ingot preparation, can solve the problems of complex equipment, high cost, and many process parameters, and achieve the effect of simple production equipment, high production efficiency, and smooth surface

Inactive Publication Date: 2012-08-08
LIAONING UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the quality of magnesium alloy ingots prepared by this method is good, there are many process parameters that need to be controlled, such as melt temperature, cooling water volume, casting speed, etc.
The method of soft contact electromagnetic continuous casting plays an important role in improving the formability of metal processing and increasing production efficiency, but the equipment is more complicated and the cost is higher

Method used

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  • Method for preparing magnesium alloy ingot and solidification system
  • Method for preparing magnesium alloy ingot and solidification system
  • Method for preparing magnesium alloy ingot and solidification system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 As shown, the equipment used in the preparation method of the magnesium alloy ingot includes a shielding gas configuration system 1, a smelting system and a solidification system 3. The shielding gas configuration system 1 sends the configured shielding gas to the smelting system 2 and the solidification system 3. process and the magnesium alloy melt or high-temperature ingot in the solidification process are protected to prevent oxidation or combustion; the melting system uses a resistance furnace 2 to complete the melting, refining, temperature and composition of the magnesium alloy; the solidification system 3 completes the ingot Control of coagulated tissue.

[0037] Such as figure 2 As shown, the solidification system 3 includes a furnace shell 304, a heat preservation furnace body 305, a resistance wire 311 arranged in the heat preservation furnace body, a bracket 310 is provided at the bottom of the furnace shell 305, and a heat preservation ga...

Embodiment 2

[0048] The equipment used is the same as in Example 1.

[0049] The preparation method of magnesium alloy ingot, concrete steps are as follows:

[0050] (1) batching, drying the crucible 4 and the Mg-Al base metal charge before smelting;

[0051] (2) Put the dried charge into the crucible 4, put the crucible 4 into the resistance furnace 2 that has been preheated to 360°C for melting, and when the furnace temperature is 410°C, feed 99.8% CO 2 +0.2%SF 6 The mixed gas protects the melt;

[0052] (3) Use the method of heating up in stages to control the heating rate. The temperature of the furnace is raised by 60°C each time, and then keep warm, and observe the melt temperature value. When the melt temperature value is equal to the furnace temperature, continue to increase the furnace temperature until the melting The body temperature reaches the set value of 890°C;

[0053] (4) When the melt temperature reaches the set temperature, move the crucible 4 with the protective ga...

Embodiment 3

[0058] The equipment used is the same as in Example 1.

[0059] The specific steps of magnesium alloy ingot casting are as follows:

[0060] (1) batching, drying the crucible 4 and the Mg-Al base metal charge before smelting;

[0061] (2) Put the dried charge into the crucible 4, put the crucible 4 into the resistance furnace 2 that has been preheated to 350°C for melting, and when the furnace temperature is 400°C, feed 99.7% CO according to the volume ratio 2 +0.3%SF 6 The mixed gas protects the melt;

[0062] (3) Use the method of heating up in stages to control the heating rate. The temperature of the furnace is raised by 50°C each time, and then keep warm, and observe the temperature of the melt. When the temperature of the melt is equal to the temperature of the furnace, continue to increase the temperature of the furnace until the melting The body temperature reaches the set temperature of 800°C;

[0063] (4) When the melt temperature reaches the set temperature, mo...

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Abstract

A method for preparing a magnesium alloy ingot comprises the following steps of: mixing ingredients, placing dried burdens into a crucible, placing the crucible into an electric resistance furnace for smelting, and introducing mixed gas to protect the melt; controlling the temperature rising speed by a sectional temperature rising method; moving the crucible into a pre-heated solidification system; turning off the power of the solidification system, increasing the content of SF6 in the protective gas, and discharging cooling water to the solidification system to cool the crucible; closing the cooling water and protective gas when the temperature of a drain pipe of the cooling water reaches the room temperature; and taking out the ingot after the ingot is naturally cooled to the room temperature. A solidification system is provided. A temperature-control thermolelectric couple is arranged in a furnace shell; a sprinkler is arranged at the bottom inside the furnace shell; and a protective gas inlet pipe is arranged on a thermal insulation cover of the crucible. High-temperature magnesium alloy melt can be prevented from being oxidized and burnt; no heat loses from the side of the crucible and the temperature is controlled precisely, so that orientated solidification can be implemented and the magnesium alloy ingot which has high surface and internal quality can be obtained.

Description

technical field [0001] The invention relates to a preparation method and a solidification system of a magnesium alloy ingot. Background technique [0002] Magnesium alloy, as the lightest structural material, shows super attractiveness in the automotive, aviation, electronics and other industrial fields due to its low density, high specific strength, and superb damping properties. Magnesium alloys are divided into cast magnesium alloys and wrought magnesium alloys, among which cast magnesium alloys account for more than 90% of the total magnesium alloys. [0003] The preparation methods of magnesium alloy ingots mainly include pressure casting, squeeze casting, gravity casting, semi-solid casting, and semi-continuous casting. Die casting is the most important and widely used forming process for magnesium alloys. Since die castings are the product of multiple processes, surface and internal defects will occur when the casting is not done properly. Squeeze casting is divide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/04B22D27/20B22D9/00
Inventor 陈淑英常国威李青春岳旭东
Owner LIAONING UNIVERSITY OF TECHNOLOGY
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