Yttrium-rich rare earth high-strength heat-resistant creep-resistant die-casting magnesium alloy

A yttrium-rich rare earth and high-strength technology is applied in the field of yttrium-rich rare earth, high-strength, heat-resistant, creep-resistant die-casting magnesium alloys, which can solve the problems that yttrium-rich rare earth cannot be fully utilized, and achieve the effects of improving creep resistance and reducing harmfulness.

Active Publication Date: 2012-01-25
XINJIANG TENGXIANG MAGNESIUM PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to market and industrial needs, after extracting Eu, Dy, Tb, and Lu high-priced elements from yttrium-rich raw materials, a large amount of cheap yttrium-rich rare earths remain and cannot be fully utilized

Method used

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  • Yttrium-rich rare earth high-strength heat-resistant creep-resistant die-casting magnesium alloy
  • Yttrium-rich rare earth high-strength heat-resistant creep-resistant die-casting magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1 AZ91+YErHo (Y=0.8%, Er=0.1%, Ho=0.05%) alloy

[0014] Yttrium-rich rare earth high-strength heat-resistant and creep-resistant die-casting magnesium alloy, the composition and mass percentage are: aluminum: 9%, Zn: 0.9%, manganese: 0.2%, Y: 0.8%, Er: 0.1%, Ho: 0.05%, Impurity elements Fe≤0.02%, Cu≤0.002%, Si≤0.01%, Ni≤0.001%, and the balance is magnesium. The raw materials used are: AZ91 magnesium alloy, magnesium-20% yttrium-rich master alloy, of which yttrium-rich is from rich The yttrium-rich rare earth after extracting Eu, Dy, Tb, and Lu high-valent elements from the yttrium-rich rare earth, the composition and mass percentage of the yttrium-rich rare earth are that Y is 20%-90%, Er is 5%-20%, and Ho is 1 %~10%.

[0015] The properties of the alloy are shown in Table 1.

[0016] Weigh the raw materials according to the ratio, Preheat the base alloy to 200°C, put it into a crucible preheated to 300°C, and pass SF 6 :CO 2 SF with a volume ratio of 1:...

Embodiment 2

[0017] Example 2 AZ91+YErHo (Y=1.5%, Er=0.15%, Ho=0.1%) alloy

[0018] Yttrium-rich rare earth high-strength heat-resistant and creep-resistant die-casting magnesium alloy, the composition and mass percentage are: aluminum: 9%, Zn: 0.9%, manganese: 0.2%, Y: 1.5%, Er: 0.15%, Ho: 0.1%, Impurity elements Fe≤0.02%, Cu≤0.002%, Si≤0.01%, Ni≤0.001%, and the balance is magnesium. The raw materials used are: AZ91 magnesium alloy, magnesium-20% yttrium-rich master alloy, of which yttrium-rich is from rich The yttrium-rich rare earth after extracting Eu, Dy, Tb, and Lu high-valent elements from the yttrium-rich rare earth, the composition and mass percentage of the yttrium-rich rare earth are that Y is 20%-90%, Er is 5%-20%, and Ho is 1 %~10%.

[0019] The properties of the alloy are shown in Table 1.

[0020] Weigh the raw materials according to the ratio, Preheat the base alloy to 200°C, put it into a crucible preheated to 300°C, and pass SF 6 :CO 2 SF with a volume ratio of 1:100...

Embodiment 3

[0021] Example 3 AZ91+YErHo (Y=0.1%, Er=0.03%, Ho=0.01%) alloy

[0022] Yttrium-rich rare earth high-strength heat-resistant and creep-resistant die-casting magnesium alloy, the composition and mass percentage are: aluminum: 9%, Zn: 0.9%, manganese: 0.2%, Y: 0.1%, Er: 0.03%, Ho: 0.01%, Impurity elements Fe≤0.02%, Cu≤0.002%, Si≤0.01%, Ni≤0.001%, and the balance is magnesium. The raw materials used are: AZ91 magnesium alloy, magnesium-20% yttrium-rich master alloy, of which yttrium-rich is from rich The yttrium-rich rare earth after extracting Eu, Dy, Tb, and Lu high-valent elements from the yttrium-rich rare earth, the composition and mass percentage of the yttrium-rich rare earth are that Y is 20%-90%, Er is 5%-20%, and Ho is 1 %~10%.

[0023] The properties of the alloy are shown in Table 1.

[0024] Weigh the raw materials according to the ratio, Preheat the base alloy to 200°C, put it into a crucible preheated to 300°C, and pass SF 6 :CO 2 SF with a volume ratio of 1:1...

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Abstract

The invention relates to an yttrium-rich rare earth high-strength heat-resistant creep-resistant die casting magnesium alloy. Aiming at the problems that the prior AZ91 magnesium alloy has lower strength, low high-temperature creep-resistant ability, poor heat resistance and so on, the yttrium-rich rare earth high-strength heat-resistant creep-resistant die casting magnesium alloy is developed. The alloy comprises the following constituents: 8.5 to 9.5 percent of Al, 0.4 to 0.9 percent of Zn, 0.2 to 0.6 percent of Mn, 0.1 to 1.5 percent of rare earth Y, 0.01 to 0.15 percent of Er, 0.01 to 0.1percent of Ho, impurity elements (Fe is less than or equal to 0.02 percent, Cu is less than or equal to 0.002 percent, Si is less than or equal to 0.01, and Ni is less than or equal to 0.001 percent), and the balance being magnesium. A rare earth raw material is a large amount of cheap yttrium-rich rare earth which is remained after high valence elements such as Eu, Dy, Tb and Lu are extracted from mixed rare earth. The prior idle rare earth resource is fully utilized, mechanical properties of room temperature and high temperature of the yttrium-rich rare earth high-strength heat-resistant creep-resistant die casting magnesium alloy are superior to those of AZ91 alloy, the minimum creep rate at a temperature of 150 DEG C under the pressure of 75MPa is 1.53*10<-9>s<-1>, and the creep elongation of 100 hours is 0.22 percent.

Description

technical field [0001] The invention relates to a yttrium-rich rare earth high-strength heat-resistant and creep-resistant die-casting magnesium alloy, which belongs to the field of metal materials. Background technique [0002] Magnesium is the lightest engineering metal material in practical engineering applications. It has a series of unique characteristics such as light specific gravity, high specific strength and specific stiffness, good machinability, good thermal conductivity, strong electromagnetic shielding ability, good vibration damping and easy recycling. Advantages, it can meet the requirements of weight reduction, consumption reduction and environmental protection in modern transportation, national defense industry, aerospace, 3C industry, manufacturing industry and other industries. It is known as "green engineering material in the 21st century". However, due to the disadvantages of poor high-temperature strength, low elongation, poor heat resistance and creep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02
Inventor 孟健张德平张景怀田政房大庆孙伟唐定骧鲁化一张洪杰
Owner XINJIANG TENGXIANG MAGNESIUM PROD CO LTD
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