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Method of preparing high performance magnesium alloy tube blank by using tube blank mold

A magnesium alloy, high-performance technology, applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve the problems of limited application and promotion, poor plasticity of magnesium alloys, etc., and achieve short process flow, improved mechanical properties, and uniform internal and external structures Effect

Inactive Publication Date: 2018-07-24
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor plasticity of magnesium alloys, its application and promotion are largely limited.

Method used

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  • Method of preparing high performance magnesium alloy tube blank by using tube blank mold
  • Method of preparing high performance magnesium alloy tube blank by using tube blank mold
  • Method of preparing high performance magnesium alloy tube blank by using tube blank mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for preparing a high-performance magnesium alloy tube blank with a tube blank mold, the magnesium alloy used is AZ91, the chemical composition and mass percentage of the magnesium alloy used are Al: 8.5-9.5%, Zn: 0.45-0.91%, Mn: 0.17-0.4%, the balance is Mg.

[0043] The preparation method, the specific steps are as follows:

[0044] (1) Melting

[0045] Weigh the raw materials according to the composition ratio of the AZ91 magnesium alloy, mix the raw materials and put them in the resistance furnace for melting to obtain the AZ91 magnesium alloy melt; during the melting process, N 2 and SF 6 The mixed gas is used as the shielding gas, wherein, in the mixed gas, SF 6 The mass concentration is 0.1%, and the nitrogen mass concentration is SF 6 100 times;

[0046] (2) Preheating

[0047] Preheating the tube blank mold with a cavity in the shape of a tube blank to obtain a preheated tube blank mold; wherein, the preheating temperature is 450°C, and the prehea...

Embodiment 2

[0055] A method for preparing a high-performance magnesium alloy tube blank with a tube blank mold, the magnesium alloy used is AZ31, the chemical composition and mass percentage of the magnesium alloy used are Al: 2.5-3.0%, Zn: 0.70-1.3%, Mn: 0.17-0.2%, the balance is Mg.

[0056] The preparation method, the specific steps are as follows:

[0057] (1) Melting

[0058] Weigh the raw materials according to the composition ratio of the AZ31 magnesium alloy, mix the raw materials and put them in the resistance furnace for melting to obtain the AZ31 magnesium alloy melt; during the melting process, N 2 and SF 6 The mixed gas is used as the shielding gas, wherein, in the mixed gas, SF 6 The mass concentration is 0.4%, and the nitrogen mass concentration is SF 6 100 times;

[0059] (2) Preheating

[0060] Preheating the tube blank mold with a cavity in the shape of a tube blank to obtain a preheated tube blank mold; wherein, the preheating temperature is 80°C, and the preheati...

Embodiment 3

[0068] A method for preparing a high-performance magnesium alloy tube blank with a tube blank mold, the magnesium alloy used is AM50, the chemical composition and mass percentage of the magnesium alloy used are Al: 4.5-5.3%, Zn: 0.2%, Mn: 0.28- 0.5%, the balance is Mg.

[0069] The preparation method, the specific steps are as follows:

[0070] (1) Melting

[0071] Weigh the raw materials according to the composition ratio of the AM50 magnesium alloy, mix the raw materials and place them in a resistance furnace for melting to obtain the AM50 magnesium alloy melt; N 2 and SF 6 The mixed gas is used as the shielding gas, wherein, in the mixed gas, SF 6 The mass concentration is 0.3%, and the nitrogen mass concentration is SF 6 100 times;

[0072] (2) Preheating

[0073] Preheating the tube blank mold with a cavity in the shape of a tube blank to obtain a preheated tube blank mold; wherein, the preheating temperature is 150°C, and the preheating time is 1h;

[0074] The sp...

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Abstract

The invention relates to a method of preparing a high performance magnesium alloy tube blank by using a tube blank mold and belongs to the field of metal materials. The method comprises the followingsteps: (1) mixing and smelting raw materials in mixed gas of N2 and SF6 according to proportion of a magnesium alloy; (2) preheating the tube blank mold to 80-450 DEG C; and (3) pouring a magnesium alloy melt into the preheated tube blank mold to condense the alloy to obtain the magnesium alloy tube blank, specifically, in the whole process, a rotary magnetic field can be applied at the same time,the electromagnetic stirring frequency is 2-30 Hz, the electromagnetic stirring current is 60-500 A, and the mode of applying the magnetic field is as follows: the rotary magnetic field can be applied or not in the pouring process, and the rotary magnetic field is applied in the condensing process. The method is suitable for various magnesium alloys, short in process flow, easy to operate and convenient to control, and can meet the demand in actual application for performance of the magnesium alloy. According to the method, a self-made mold is adopted and a cavity is of a tube blank shape, sothat the stirring effect is good, the obtained magnesium alloy casting is uniform in inner and outer tissues and fine in grain size, and the mechanical properties are improved obviously.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a method for preparing a high-performance magnesium alloy tube blank by using a tube blank mold. Background technique [0002] Magnesium alloy is currently one of the lightest metal structural materials in industrial applications. It has high specific strength, specific stiffness and good casting, shock absorption, cutting and dimensional stability. It is used in aerospace, transportation, Electronics, electrical appliances, communications and other fields. However, due to the poor plasticity of magnesium alloys, its application is largely limited. [0003] Patent [CN200410066790] discloses a high-strength wrought magnesium alloy preparation process. The method is to add alloy elements Al, Ti, Mn, and Zn after the pure magnesium is completely melted, stir it with tools to make it evenly mixed, and homogenize the obtained ingot treatment and plastic deformati...

Claims

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Application Information

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IPC IPC(8): C22C23/02C22C1/02B22C9/24B22D27/02
CPCB22C9/24B22D27/02C22C1/02C22C23/02
Inventor 于宝义郑黎霍春影李润霞王冰卞健从李强
Owner SHENYANG POLYTECHNIC UNIV
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