Mg-Nd-Zn-Zr alloy material containing Y and preparation process thereof

A technology of alloy material and preparation process, which is applied in the field of Y-containing Mg-Nd-Zn-Zr alloy material and its preparation process, can solve the problems of less impact research, achieve obvious grain refinement, and increase elongation , The effect of improving the mechanical properties

Inactive Publication Date: 2016-04-27
黄晓艺
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  • Abstract
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Problems solved by technology

At present, there are many studies on Gd and Y in Mg-Zr system at home and abroad, but there are few studies on th

Method used

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  • Mg-Nd-Zn-Zr alloy material containing Y and preparation process thereof
  • Mg-Nd-Zn-Zr alloy material containing Y and preparation process thereof

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[0008] The materials used in the experiment are pure magnesium (99.96% mass fraction), pure zinc (99.92%), magnesium zirconium master alloy (30% Zr) and magnesium yttrium master alloy (31.72% Y). The design alloy composition is shown in Table 1. The alloy is smelted in a resistance crucible furnace. RJ-2 covering agent is used for smelting. The smelting temperature is 770 °C. After the alloy is completely melted, it is left for 15 minutes. The diameter×height of the obtained alloy ingot is 60mm×130mm. The mechanical properties of the samples were tested by CSS-44100 universal electronic testing machine, and the tensile rate was 2 mm / min.

[0009]

[0010] Table 2 shows the room temperature mechanical properties of each alloy as-cast. It can be seen from Table 2 that when the content of rare earth element Y is 4% and 6%, the tensile strength, yield strength and elongation of the alloy gradually increase, and when the content of Y element is 6%, the alloy shows the best perf...

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Abstract

The invention discloses an Mg-Nd-Zn-Zr alloy material containing Y. The Mg-Nd-Zn-Zr alloy material is characterized by comprising the following components in parts by mass: 0.2 of Zn, 0.4 of Zr, 2.0 of Nd, 4-8 of Y, and the balance of Mg. A preparation process is characterized in that pure magnesium, pure zinc, 30% of Zr magnesium zirconium intermediate alloy and 31.72% of Y magnesium yttrium intermediate alloy are smelted by using a RJ-2 covering agent at a smelting temperature of 770 DEG C, are stood by 15 minutes after being totally molten, are poured in an iron mold, preheated to 200 DEG C, at 720 DEG C, and are molded by pouring.

Description

technical field [0001] The invention relates to a Y-containing Mg-Nd-Zn-Zr alloy material and a preparation process thereof. Background technique [0002] Magnesium alloy is currently the lightest metal structural material available in industry. It has the advantages of small mass, high specific strength and specific stiffness, good thermal conductivity and vibration damping, and easy machining. It is widely used in aerospace and aviation industries. At present, the low strength and plasticity of magnesium alloys are one of the main bottlenecks restricting the development and application of magnesium alloys. Adding rare earth elements can effectively strengthen and purify the alloys, improve the casting properties, and improve the high-temperature strength and plasticity of the alloys. Mg-Zn-Zr alloys are commonly used wrought magnesium alloys. The typical representative is ZK60 magnesium alloy with high zinc content. However, due to high zinc content, poor heat resistance a...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22C1/03
Inventor 黄晓艺
Owner 黄晓艺
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