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High-temperature-resistant rare earth magnesium alloy

A rare earth magnesium and high temperature resistant technology, applied in the field of metal materials, can solve the problems of insufficient heat resistance and low strength, and achieve the effects of high service temperature, broad application prospects and good strength performance.

Inactive Publication Date: 2013-06-12
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The current commercial heat-resistant magnesium alloys such as WE43 have the main disadvantages that the heat resistance is not stable enough, and the strength drops more at high temperatures, which cannot fully meet the requirements of aerospace, military, automobile and other industries in a wide temperature range. Higher requirements for strength when used at 200°C to 300°C

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  • High-temperature-resistant rare earth magnesium alloy

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Embodiment 1

[0014] The high temperature resistant rare earth magnesium alloy of this embodiment is composed of the following components in mass percentage: 5% Y, 1% Nd, 1% Sm, 0.5% Sb, the total amount of impurity elements Si, Fe, Cu and Ni is less than 0.2%, The balance is Mg. The sum of the mass percentages of Y, Nd and Sm is 7%.

[0015] The high temperature resistant rare earth magnesium alloy of this embodiment is made by melting and casting Mg, Sb and master alloys Mg-Y, Mg-Nd, Mg-Sm as raw materials and undergoing heat treatment. The alloy is formulated according to the composition, and the casting process is as follows: using a corundum crucible and an intermediate frequency induction furnace, in CO 2 +SF 6 Melting under the protection of mixed gas, when the temperature of magnesium liquid rises to 750°C, it is cast into a steel mold to obtain Mg-5Y-1Nd-1Sm-0.5Sb cast magnesium alloy, and then heat treatment is carried out. The heat treatment process is: 525°C Dissolution treat...

Embodiment 2

[0017] The high temperature resistant rare earth magnesium alloy of this embodiment is composed of the following components in mass percentage: 4% Y, 0.5% Nd, 2.5% Sm, 0.2% Sb, the total amount of impurity elements Si, Fe, Cu and Ni is less than 0.2%, The balance is Mg. The sum of the mass percentages of Y, Nd and Sm is 7%.

[0018] The high temperature resistant rare earth magnesium alloy of this embodiment is made by melting and casting Mg, Sb and master alloys Mg-Y, Mg-Nd, Mg-Sm as raw materials and undergoing heat treatment. The alloy is formulated according to the composition, and the casting process is as follows: using a corundum crucible and an intermediate frequency induction furnace, in CO 2 +SF 6 Smelting under the protection of mixed gas, when the temperature of the molten magnesium reaches 750°C, it is cast into a steel mold to obtain Mg-4Y-0.5Nd-2.5Sm-0.2Sb cast magnesium alloy, which is then heat treated. The heat treatment process is: 525 ℃ solution treatmen...

Embodiment 3

[0020] The high temperature resistant rare earth magnesium alloy of this embodiment is composed of the following components in mass percentage: 3% Y, 2.5% Nd, 0.5% Sm, 1% Sb, the total amount of impurity elements Si, Fe, Cu and Ni is less than 0.2%, The balance is Mg. The sum of the mass percentages of Y, Nd and Sm is 6%.

[0021] The high temperature resistant rare earth magnesium alloy of this embodiment is made by melting and casting Mg, Sb and master alloys Mg-Y, Mg-Nd, Mg-Sm as raw materials and undergoing heat treatment. The alloy is formulated according to the composition, and the casting process is as follows: using a corundum crucible and an intermediate frequency induction furnace, in CO 2 +SF 6 Melting under the protection of mixed gas, when the temperature of molten magnesium reaches 750°C, cast it into a steel mold to obtain Mg-3Y-2.5Nd-0.5Sm-1Sb as-cast magnesium alloy, and then conduct heat treatment, the heat treatment process is: 525°C Solution treatment fo...

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Abstract

The invention discloses a high-temperature-resistant rare earth magnesium alloy which consists of the following components in percentage by mass: 3-5 percent of Y, 0.5-2.5 percent of Nd, 0.5-2.5 percent of Sm, 0.2-1 percent of Sb, impurity elements Si, Fe, Cu and Ni of which the total amount is less than 0.2 percent, and the balance of Mg. The high-temperature-resistant rare earth magnesium alloy is stable in high-temperature performance and has high high-temperature tensile strength, and the tensile strength can reach over 200Mpa at the temperature of 300 DEG C; and compared with the commercial heat-resistant magnesium alloy WE43 alloy, the high-temperature-resistant rare earth magnesium alloy has high strength performance and high application temperature and has wide application prospect in aspects such as aerospace, automobile industry and military hardware.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a high-temperature resistant rare earth magnesium alloy. Background technique [0002] Magnesium is the lightest metallic structural material and is increasingly used in automobiles. The use of magnesium alloys in automobiles can reduce weight and reduce exhaust emissions. Therefore, the research and development of magnesium alloys is of great significance for saving energy and suppressing environmental pollution. However, the poor strength and heat resistance of magnesium alloys seriously hinders its application in aerospace, military, automobile and other industries. Therefore, improving the strength and heat resistance of magnesium alloys is an important topic in the field of magnesium alloy materials research. [0003] Existing heat-resistant magnesium alloys mainly start with restricting dislocation movement and strengthening grain boundaries. Through pr...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22C1/03
Inventor 张清李全安陈君付三玲朱宏喜张兴渊
Owner HENAN UNIV OF SCI & TECH