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Magnesium alloy

A magnesium alloy and mixed rare earth technology, which is applied in the structural parts of motorcycles, magnesium alloys for casting, and automobile fields, can solve the problems of magnesium alloys that have not been seen in Mg-Al-RE-Zn, and achieve good die-casting process performance, Effect of improving high temperature stability and heat resistance, and improving strong plasticity

Inactive Publication Date: 2007-07-18
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Also do not see the magnesium alloy of Mg-Al-RE-Zn of the present invention at present

Method used

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  • Magnesium alloy

Examples

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Effect test

example 1

[0023] Example 1, a magnesium alloy, its composition and weight percent are: Al 6.50%, 2n 1.20%, Mn 0.10%, Ce-rich mixed rare earth 0.50%, impurity elements Be≤0.10%, Cu≤0.030%, Ni≤0.002 %, Fe≤0.005%, Si≤0.005%, and the rest is Mg.

[0024] The preparation process of the magnesium alloy of this example is carried out according to the following sequence steps: each of magnesium, aluminum, zinc, and manganese is prepared according to the above formula, placed in a crucible for heating, and when heated to 400 ° C, SF is introduced into the crucible 6 / N 2 After heating and melting the mixed gas, raise the temperature to 700°C; add Ce-rich mixed rare earth into the crucible at one time according to the formula, stir evenly and raise the furnace temperature to 740°C, keep it for 30 minutes, and then drop it to 680°C ℃, carry out high-pressure die-casting, take out the mold and cool, and obtain the magnesium alloy casting of the present invention.

[0025] The normal temperature t...

example 2

[0026] Example 2, a magnesium alloy, its composition and weight percentage are: Al 7.50%, Zn 0.90%, Mn 0.20%, Ce-rich mixed rare earth 1.00%, impurity elements Be≤0.10%, Cu≤0.030%, Ni≤0.002 %, Fe≤0.005%, Si≤0.005%, and the rest is Mg.

[0027] The preparation process of the magnesium alloy of this example is carried out in the following sequence steps: each of magnesium, aluminum, zinc, and manganese is prepared according to the above formula, placed in a crucible for heating, and when heated to 420 ° C, SF is introduced into the crucible 6 / N 2 After heating and melting the mixed gas, raise the temperature to 720°C, add Ce-rich mixed rare earth into the crucible at one time according to the formula, stir evenly and raise the furnace temperature to 740°C, keep it for 30 minutes, and drop it to 680°C ℃; perform high pressure die casting to obtain the magnesium alloy casting of the present invention.

[0028] The normal temperature tensile strength, yield strength and elongati...

example 3

[0029] Example 3, a magnesium alloy, its composition and weight percent are: Al 8.03%, Zn0.70%, Mn0.25%, Ce-rich mixed rare earth 1.50%, impurity elements Be≤0.10%, Cu≤0.030%, Ni ≤0.002%, Fe≤0.005%, Si≤0.005%, and the rest is Mg.

[0030] Its preparation process of the magnesium alloy of this example is the same as Example 2.

[0031] The normal temperature tensile strength, yield strength and elongation of the magnesium alloy of this example are 273MPa, 167MPa, 12.36% respectively; Under the tensile stress, the 120-hour strain is 0.56%.

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Abstract

The present invention is one kind of magnesium alloy with high strength, high toughness and high heat resistance and for casting structural part of automobile and motorcycle. The magnesium alloy includes Al 6.50-8.70 wt%, Zn 0.41-1.20 wt%, Mn 0.10-1.0 wt%, mixed Ce-rice RE 0.50-4.00 wt%, impurity element Be not more than 0.10 wt%, Cu not more than 0.030 wt%, Ni not more than 0.002 wt%, Fe not more than 0.005 wt%, Si not more than 0.005 wt%, and Mg for the rest. Compared with traditional cast magnesium alloy, the present invention has compact structure, high strength, high toughness, high heat resistance and capacity of meeting the requirement of structural part in safety performance.

Description

technical field [0001] The invention relates to a magnesium alloy, in particular to a high-strength, heat-resistant magnesium alloy for casting, which is used for structural parts of automobiles and motorcycles. Background technique [0002] Magnesium has a series of advantages such as light specific gravity, high specific strength and specific stiffness, good damping and machinability, good thermal conductivity, strong electromagnetic shielding ability, good vibration damping and easy recycling. It has become the material of choice for modern automobiles, motorcycles and 3C industries. However, there are still a large number of technical difficulties to be solved, which restrict the further application of cast magnesium alloy parts in the automobile and motorcycle industries. The requirements of the motorcycle industry, and the performance of the casting forming process is poor, and it has not yet been applied on a large scale in automobiles, motorcycles, safety performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02
Inventor 龙思远廖慧敏朱志兵
Owner CHONGQING UNIV
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