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Method for smelting magnesium alloy

A magnesium alloy and magnesium melting technology, which is applied in the field of magnesium alloy preparation, can solve the problems of large metal oxidation and burning loss, reduced quality and performance, and many magnesium alloy inclusions, and achieves the effect of reducing burning loss and melting time.

Active Publication Date: 2007-05-23
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the traditional smelting method of magnesium alloys has large metal oxidation and burning loss and is difficult to control, and the prepared magnesium alloys have many inclusions, reduced quality and performance, and are unstable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: 1000 kilograms of AZ91D magnesium alloy smelting method.

[0041] 1. Melting preparation

[0042] Connect the power supply of the preheating furnace, melting furnace, alloying furnace and static holding furnace, and heat up. Raise the temperature of the preheating furnace to 420-460°C, raise the temperature of the melting furnace, the alloying furnace and the static holding furnace to 600-620°C respectively, and respectively pass in protective gas (0.2-0.5% SF 6 +N 2 ).

[0043] 2. Preheating of pure magnesium ingot

[0044] The pure magnesium ingot with a clean surface is preheated to 380-420°C in a preheating furnace.

[0045] 3. Pure magnesium ingot melting

[0046] First add 100-120 kg of pure magnesium ingots with clean surface to make them melt completely under the protection of the aforementioned mixed gas, and then add the pure magnesium ingots preheated to the set temperature into the melting furnace in batches. Add about 30-50 kg for the fi...

Embodiment 2

[0053] Embodiment 2: 1000 kilograms of AM60B magnesium alloy smelting method.

[0054] 1. Melting preparation

[0055] Connect the power supply of the preheating furnace, melting furnace, alloying furnace and static holding furnace, and heat up. Raise the temperature of the preheating furnace to 420-460°C, raise the temperature of the melting furnace, alloying furnace and static holding furnace to 600-620°C, and pass in protective gas (0.2-0.5% SF 6 +N 2 ).

[0056] 2. Preheating of pure magnesium ingot

[0057] The pure magnesium ingot with a clean surface is preheated to 380-420°C in a preheating furnace.

[0058] 3. Pure magnesium ingot melting

[0059] First add 100-120 kg of pure magnesium ingots with clean surface to make them melt completely under the protection of the aforementioned mixed gas, and then add the pure magnesium ingots preheated to the set temperature into the melting furnace in batches. Add about 30-50 kg for the first time, and the specific amount ...

Embodiment 3

[0066] Embodiment 3: 1000 kilograms of AS41B magnesium alloy smelting method.

[0067] 1. Melting preparation

[0068] Connect the power supply of the preheating furnace, melting furnace, alloying furnace and static holding furnace, and heat up. Raise the temperature of the preheating furnace to 420-460°C, raise the temperature of the melting furnace, alloying furnace and static holding furnace to 600-620°C, and pass in protective gas (0.2-0.5% SF 6 +N 2 ).

[0069] 2. Preheating of pure magnesium ingot

[0070] The pure magnesium ingot with a clean surface is preheated to 380-420°C in a preheating furnace.

[0071] 3. Pure magnesium ingot melting

[0072] First add 100-120 kg of pure magnesium ingots with clean surface to make them melt completely under the protection of the aforementioned mixed gas, and then add the pure magnesium ingots preheated to the set temperature into the melting furnace in batches. Add about 30-50 kg for the first time, and the specific amount ...

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Abstract

A method for smelting magnesium alloy contains the following steps: preparing material, heating the preheating furnace, melting furnace, alloying furnace and standing holding furnace respectively, and introducing protective gas respectively, preheating magnesium ingot to 120-600DEG C in preheating furnace, adding into the melting furnace for several times for melting, keeping the temperature at 660-780DEG C, introducing the magnesium fusing liquid into the alloying furnace, keeping the temperature at 660-780DEG C, melting other alloy elements with the melting furnace, refining, keeping the temperature of the melting liquid at 720-730DEG C, introducing into the alloying furnace to mix with magnesium fusing liquid, blowing argon for refining, transferring into standing holding furnace, keeping the temperature of the melting liquid at 680-860DEG C, casting magnesium alloying melting liquid to ingot, or cast continuously or semi-continuous. The invention can prevents oxidization and loss of the metal, reduced impurities in magnesium alloy, and improves the quality and performance of magnesium alloy.

Description

technical field [0001] The invention relates to a method for preparing a magnesium alloy. Background technique [0002] Magnesium alloy has very significant advantages in many occasions due to its low density (it is the smallest density among practical structural metals). Especially in aviation, aerospace, and automobiles, motorcycles, high-speed / light rail trains and other transportation vehicles, it has irreplaceable advantages. The low density of the components can save energy, and it also has the advantage of small inertia in the case of high-speed movement, which has a significant effect on the starting and braking of vehicles. [0003] However, the traditional smelting method of magnesium alloys is to use a melting furnace to melt all the magnesium ingots to be smelted at one time, and then directly add other alloying elements in the form of pure metals or intermediate alloys to the molten magnesium for alloying. Since all magnesium ingots are heated and melted at th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C23/00
Inventor 张奎李兴刚罗文米绪军焦红忠熊柏青孙银祥李永华
Owner GRIMAT ENG INST CO LTD
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