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High-strength deformation magnesium alloy containing rare earth samarium, and preparation method thereof

A technology for deforming magnesium alloys and magnesium alloys, which is applied in the field of metal materials and can solve problems such as poor mechanical properties and excessive rare earth content in magnesium alloys.

Inactive Publication Date: 2018-11-06
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-strength deformed magnesium alloy containing rare earth samarium and a preparation method thereof in order to solve the problems of excessive rare earth content or poor mechanical properties of existing magnesium alloys

Method used

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  • High-strength deformation magnesium alloy containing rare earth samarium, and preparation method thereof
  • High-strength deformation magnesium alloy containing rare earth samarium, and preparation method thereof

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preparation example Construction

[0035] The present invention also provides a preparation method of high-strength wrought magnesium alloy containing rare earth samarium. The magnesium alloy uses pure Mg ingot, pure Zn ingot, Mg-Zr master alloy and Mg-Sm master alloy as raw materials for smelting and casting, homogenization treatment, heating Prepared by extrusion and aging treatment, including the following steps:

[0036] (1) Preparation of magnesium alloy ingots: mixing pure Mg ingots, pure Zn ingots, raw materials of Zr elements, and raw materials of Sm elements, and casting them into magnesium alloy ingots;

[0037] (2) Preparation of extrusion billet: homogenize the above-mentioned magnesium alloy ingot at 500-530° C. for 6-14 hours, and process it into an extrusion billet;

[0038] (3) Preparation of extrusion profiles: preheat the above-mentioned extrusion billet and extrusion die in a resistance furnace at 300-400°C for 1.5-3.5h, and preheat the extruder at 300-400°C for 1-2h, and the extrusion ratio ...

Embodiment 1

[0049] The high-strength wrought magnesium alloy of this embodiment is composed of the following components by mass percentage: 3.5% Sm, 0.6% Zn, 0.5% Zr, and the balance is Mg and unavoidable impurities.

[0050] The preparation of the high-strength wrought magnesium alloy of this embodiment comprises the following steps:

[0051] (1) Preparation of magnesium alloy ingot: pure Mg ingot, pure Zn ingot, Mg-Zr (Zr is 20wt.%) master alloy, Mg-Sm (Sm is 25wt.%) master alloy batching according to the above-mentioned mass percentage, then Drying is carried out, the drying temperature is 280°C, and the drying time is 1.5h.

[0052] During the preparation process, the melt has been in CO 2 and SF 6 Under the protection of mixed gas, CO 2 with SF 6 The ratio is 99:1, put the dried pure Mg ingot into the crucible and heat up with the furnace until it is completely melted, and the temperature is controlled at 730°C to obtain a magnesium melt;

[0053] Add the dried Mg-Sm master allo...

Embodiment 2

[0063] The difference between Example 2 and Example 1 is that the extrusion billet and extrusion die are preheated in a resistance furnace at 380°C for 2 hours, the extruder is preheated at 380°C for 2 hours, the extrusion ratio is 20:1, and the extrusion speed 1.0m / min.

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Abstract

The invention provides a high-strength deformation magnesium alloy containing rare earth samarium, and a preparation method thereof, belongs to the technical field of metal materials, and solves the problem of overhigh rare earth content and poor mechanical property of traditional magnesium alloy. The magnesium alloy disclosed by the invention is prepared from the following ingredients in parts byweight: 1.0-6.6wt% of Sm, 0.5-3.5wt% of Zn, 0.15-1.5wt% of Zr and the balance of Mg. The invention also provides a preparation method for the high-strength deformation magnesium alloy containing rareearth samarium. The high-strength deformation magnesium alloy containing rare earth samarium disclosed by the invention has excellent mechanical property. Mg-3.5Sm-0.6Zn-0.5Zr is taken as an exampleto show that the indoor temperature yield strength and the tensile strength are respectively 415MPa and 423MPa.

Description

technical field [0001] The invention belongs to the technical field of metal materials, in particular to a high-strength deformed magnesium alloy containing rare earth samarium and a preparation method thereof. Background technique [0002] Metal magnesium and magnesium alloys are currently the lightest metal materials in industrial applications. Due to their excellent castability, specific stiffness, specific strength, good machinability, high damping coefficient and excellent electromagnetic shielding performance, they make It has great application potential in the fields of automobiles, aviation, electronics, etc., and has become one of the new green materials in the 21st century that manufacturers in industries such as automobiles and aircrafts around the world are competing to research and develop. However, the strength of traditional magnesium alloys is not high, which severely limits the application of magnesium alloys. Therefore, the development of high-strength magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C1/02C22F1/06
CPCC22C1/02C22C23/06C22F1/06
Inventor 孟健管凯杨强李柏顺张栋栋孙伟田政牛晓东张德平邱鑫
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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