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High-speed-extrudable wrought magnesium alloy and preparation method thereof

A technology for deforming magnesium alloys and magnesium alloys, applied in the field of metal materials and their processing, can solve the problems of low mechanical properties of magnesium alloys, achieve the effects of promoting dynamic recrystallization, improving corrosion resistance, and enhancing dynamic precipitation response effects

Active Publication Date: 2015-12-16
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to propose a deformed magnesium alloy that can be extruded at a high speed and its The preparation method, the alloy is a new type of Mg-Bi-Al-Zn-Mn alloy, which can be used for high-speed extrusion production with an extrusion speed of not less than 20m / min, which improves production efficiency while reducing production costs, and extrudes the finished product Fine grains and good mechanical properties

Method used

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  • High-speed-extrudable wrought magnesium alloy and preparation method thereof
  • High-speed-extrudable wrought magnesium alloy and preparation method thereof
  • High-speed-extrudable wrought magnesium alloy and preparation method thereof

Examples

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Effect test

Embodiment 1

[0042] Design and select Mg-5.8Bi-3.0Al-1.2Zn-0.2Mn (wt%), and form a magnesium alloy according to the composition ratio (per 1000 grams of target alloy can be made of 40 grams of Mg-5Mn, 12 grams of Zn, 30 grams of Al, 58 1 gram Bi and 860 gram Mg are formulated), the preparation processing method comprises the following steps:

[0043] ① First clean the melting furnace and heat it to 450°C, put the magnesium ingot preheated to 200°C into the crucible of the melting furnace and heat it so that the furnace temperature rises to 720°C at a heating rate of 20-40°C / min .

[0044] ② After the pure magnesium ingots are completely melted, add pure bismuth, pure aluminum, pure zinc and Mg-5Mn master alloy preheated to about 200°C, and raise the furnace temperature to 750°C, and keep it warm for about 10-20 minutes.

[0045] ③ After all the raw materials in step 2) are melted, stir for 2-5 minutes, adjust the furnace temperature to 720° C., keep the temperature for 8-10 minutes, so th...

Embodiment 2

[0051] The design selects Mg-7.0%Bi-2.0%Al-1.0%Zn-0.3%Mn, and forms magnesium alloy according to composition ratio (every 1000 grams of target alloy can be made of 60 grams of Mg-5Mn master alloy, 10 grams of pure Zn, 20 grams Pure Al, 70 grams of pure Bi and 840 grams of pure Mg are formulated), the preparation processing method comprises the following steps:

[0052] ① First clean the melting furnace and heat it to 450°C, put the magnesium ingot preheated to 200°C into the crucible of the melting furnace and heat it so that the furnace temperature rises to 720°C at a heating rate of 20-40°C / min .

[0053] ② After the pure magnesium ingots are completely melted, add pure bismuth, pure aluminum, pure zinc and Mg-5Mn master alloy preheated to about 200°C, and raise the furnace temperature to 750°C, and keep it warm for about 10-20 minutes.

[0054] ③ After all the raw materials in step 2) are melted, stir for 2-5 minutes, adjust the furnace temperature to 720° C., keep the tem...

Embodiment 3

[0060] The design selects Mg-8.0%Bi-1.0%Al-1.0%Zn-0.3%Mn, and forms magnesium alloy according to composition ratio (every 1000 grams of target alloy can be made of 40 grams of Mg-5Mn master alloy, 10 grams of pure Zn, 10 grams Pure Al, 80 grams of pure Bi and 860 grams of pure Mg are formulated), the preparation processing method comprises the following steps:

[0061] ① First, clean the melting furnace and heat it to 450°C, put the magnesium ingot preheated to 200°C into the crucible of the melting furnace, and heat it so that the furnace temperature rises to 720°C at a heating rate of 20-40°C / min .

[0062] ②After the pure magnesium ingots are completely melted, add pure bismuth, pure aluminum, pure zinc and Mg-5Mn intermediate alloy preheated to about 200°C, and raise the furnace temperature to 750°C, and keep it for about 10-20 minutes.

[0063] ③ After all the raw materials in step 2) are melted, stir for 2-5 minutes, adjust the furnace temperature to 720° C., keep the t...

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Abstract

The invention discloses a high-speed-extrudable wrought magnesium alloy and a preparation method thereof. The high-speed-extrudable wrought magnesium alloy comprises the following components in percentage by mass: 2wt%-10wt% of Bi, 0.5wt%-5wt% of Al, 0.1wt%-2wt% of Zn, 0.1wt%-1.0wt% of Mn and the balance of magnesium. According to the high-speed-extrudable wrought magnesium alloy, the element Bi is taken as a main alloy element, lots of Mg3Bi2 phases are formed by virtue of a simple alloying measure, and a small quantity of aluminum elements and zinc elements are supplemented, so that the plasticity of the alloy is improved; and by combining a manganese element, the corrosion resistance is improved, and the high-speed-extrudable high-strength magnesium alloy is developed from the alloy series and can be applied to high speed extrusion with the extrusion speed which is not less than 20m / min.

Description

technical field [0001] The invention relates to a metal material and an alloy in the field of processing thereof and a preparation method thereof, in particular to a deformed magnesium alloy with an extrusion speed not less than 20m / min and a preparation method thereof. Background technique [0002] Since the 1980s, with the rapid development of the automobile industry, the urgent requirements for energy saving, safety, and environmental protection for lightweight transportation equipment have led to a rapid increase in the use of magnesium alloys in the fields of automobiles, rail transit, and aerospace. There has been an upsurge in the development and application of magnesium alloys at home and abroad. Magnesium alloys have also become the third largest metal engineering materials after steel and aluminum alloys. They are known as "21st century commercial green environmental protection and ecological structural materials". Wrought magnesium alloys can provide plates, rods,...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C1/03
Inventor 孟帅举余晖王志峰秦春玲赵维民
Owner HEBEI UNIV OF TECH
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