Tough antiflaming magnesium alloy and preparation method thereof

A magnesium alloy, strong and tough technology, applied in the field of strong and tough flame-retardant magnesium alloy materials and their preparation, can solve the problems of low, polluted mechanical properties of the alloy, poor effect, etc., and achieves cost reduction, excellent mechanical properties, and rich rare earth resources. Effect

Inactive Publication Date: 2012-07-11
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of poor effect, serious pollution and low alloy mechanical properties in the existing magnesium alloy flame retardant technology, and provide a kind of strong flame retardant magnesium alloy and its preparation method, by controlling the content of specific rare earth elements , so that the magnesium alloy can achieve the purpose of high strength and high toughness while being flame retardant

Method used

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  • Tough antiflaming magnesium alloy and preparation method thereof
  • Tough antiflaming magnesium alloy and preparation method thereof
  • Tough antiflaming magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: Get 1010 grams of commercially pure Mg (99.99wt.%) (calculated by 20% burning loss), get 217 grams of Mg-30wt.% Gd master alloy (calculated by 30% burning loss), get Mg-20wt. 33 grams of % Er master alloy (calculated on the basis of 30% burning loss), and 10 grams of Mg-30wt.% Zr master alloy (calculated on the basis of 20% burning loss). Its preparation process is:

[0019] (1) Clean up the melting tools and crucible, brush the paint, and take out the crucible after preheating to 600°C;

[0020] (2) Add pre-dried commercially pure Mg into the crucible, in order to prevent oxidation in N 2 Gas and SF 6 Heating under the protection of mixed gas (wherein SF 6 Volume fraction is 1%), warming up to 780 ℃;

[0021] (3) Skim off the scum after the furnace charge is completely melted, add Mg-Gd and Mg-Er master alloys and stir for 3 minutes after they are completely melted, then add Mg-Zr master alloys and stir for 3 minutes after they are completely melted, ...

Embodiment 2

[0026] Embodiment 2: Get 990 grams of commercially pure Mg (99.99wt.%) (calculated by 20% burning loss), get 217 grams of Mg-30wt.% Gd master alloy (calculated by 30% burning loss), get Mg-20wt. 65 grams of % Er master alloy (calculated on the basis of 30% burning loss), and 10 grams of Mg-30wt.% Mn master alloy (calculated on the basis of 20% burning loss). Its preparation process is:

[0027] (1) Clean up the melting tools and crucible, brush the paint, and take out the crucible after preheating to 600°C;

[0028] (2) Add pre-dried commercially pure Mg into the crucible, in order to prevent oxidation in N 2 Gas and SF 6 Heating under the protection of mixed gas (wherein SF 6 Volume fraction is 1%), warming up to 780 ℃;

[0029] (3) Skim off the scum after the furnace charge is completely melted, add Mg-Gd and Mg-Er master alloy and stir for 3 minutes after it is completely melted, then add Mg-Mn master alloy and stir for 3 minutes after it is completely melted, and keep ...

Embodiment 3

[0034] Embodiment 3: Get 960 grams of commercially pure Mg (99.99wt.%) (calculated by 20% burning loss), get 217 grams of Mg-30wt.%Gd master alloy (calculated by 30% burning loss), get Mg-20wt. 65 grams of % Er master alloy (calculated on the basis of 30% burning loss), and 40 grams of Mg-30wt.% Mn master alloy (calculated on the basis of 20% burning loss). Its preparation process is:

[0035] (1) Clean up the melting tools and crucible, brush the paint, and take out the crucible after preheating to 600°C;

[0036] (2) Add pre-dried commercially pure Mg into the crucible, in order to prevent oxidation in N 2 Gas and SF 6 Heating under the protection of mixed gas (wherein SF 6 Volume fraction is 1%), warming up to 780 ℃;

[0037] (3) Skim off the scum after the furnace charge is completely melted, add Mg-Gd and Mg-Er master alloy and stir for 3 minutes after it is completely melted, then add Mg-Mn master alloy and stir for 3 minutes after it is completely melted, and keep i...

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Abstract

The invention discloses tough antiflaming magnesium alloy and a preparation method thereof. The alloy contains the following chemical constituents by weight percent: 5.0-12.0% of Gd, 0.5-3.0% of Er, 0-1.0% of Mn and 0-0.8% of Zr, the weight proportions of the limited impurity elements are Fe<0.005%, Si<0.05%, Cu<0.015% and Ni<0.002% and the allowance is Mg. The preparation method is as follows: preheating industrial pure magnesium in a crucible under the protection of N2 and SF6 to skim off the scum, adding corresponding Mg-Gd, Mg-Zr, Mg-Mn and Mg-Er intermediate alloys in batches, after the intermediate alloys are melted, adding refining agent for refining, and finally when the alloy liquid reaches the temperature of 720 DEG C, pouring the alloy liquid to a metal mold. By controlling the contents of the special rare earth elements, the invention enables the magnesium alloy to have high strength and toughness while being flame-retardant. The magnesium alloy can be prepared and processed under the condition of no flame retardancy protection and can undergo the processes of casting, die-casting, high-speed cutting and heat treatment directly under atmospheric environment.

Description

technical field [0001] The invention relates to a tough flame-retardant magnesium alloy material and a preparation method thereof, belonging to the field of metal materials and metallurgy. Background technique [0002] Magnesium alloys are known as "green engineering materials in the 21st century" due to their advantages in resources, performance and environment, and their applications in the fields of national economy and national defense such as aerospace, automobile industry and electronics industry are expanding day by day. Although magnesium alloy has many advantages that other engineering materials do not have, it has a fatal shortcoming. Due to the active chemical properties of magnesium, magnesium is very easy to be separated from the air even when it is in a solid state at a relatively high temperature. Oxygen reacts to produce violent combustion. This brings great difficulties to the production, processing and handling of magnesium alloys, making the production of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00B22D21/04C22B26/22
CPCY02P10/146
Inventor 王朝辉王旭东杜文博李淑波
Owner BEIJING UNIV OF TECH
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