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A calcium-containing rare earth magnesium alloy plate with high room temperature formability and its preparation method

A technology for deforming magnesium alloys and magnesium alloys, which is applied in metal rolling, metal rolling, metal processing equipment, etc., can solve problems such as increasing production costs, and achieve the effects of improving ignition point, reducing costs, and improving room temperature formability.

Active Publication Date: 2020-05-12
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with this patent, its additional processing technology increases the production cost

Method used

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  • A calcium-containing rare earth magnesium alloy plate with high room temperature formability and its preparation method
  • A calcium-containing rare earth magnesium alloy plate with high room temperature formability and its preparation method
  • A calcium-containing rare earth magnesium alloy plate with high room temperature formability and its preparation method

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preparation example Construction

[0050] The above-mentioned calcium-containing rare earth magnesium alloy sheet with high room temperature formability and its preparation method, the specific steps are as follows:

[0051] Step 1: Ingredients: Weigh the raw materials according to the mass percentage of the components. The raw materials are: magnesium ingots with a mass percentage of not less than 99.99%, aluminum ingots with a mass percentage of not less than 99.9%, zinc ingots with a mass percentage of not less than 99.99%, magnesium calcium Master alloy, magnesium-gadolinium master alloy, magnesium-yttrium master alloy, magnesium-manganese master alloy;

[0052] Step 2: Melting and casting: Put the raw materials into a vacuum induction smelting furnace, heat up to 750°C for 10-15 minutes, and then obtain magnesium alloy ingots through semi-continuous water-cooled casting or solid mold casting;

[0053] Step three, solution treatment: heat the magnesium alloy ingot produced in the second step at 300-450°C for 12-24...

Embodiment 1

[0057] Mg 96.6 Al 2 Zn 1 Ca 0.2 Gd 0.2 Magnesium alloy plate (1mm thick): Weigh the raw materials according to the mass percentage of the components. The raw materials are: 99.99% by mass magnesium ingot, 99.9% by mass aluminum ingot, 99.99% by mass zinc ingot, and 30 by mass percentage. % Magnesium-calcium master alloy, 30% by mass magnesium-gadolinium master alloy. According to the nominal composition of the magnesium alloy, and considering the heat loss of various elements, the batching is carried out.

[0058] Mg 96.6 Al 2 Zn 1 Ca 0.2 Gd 0.2 Smelting and casting. The raw materials are put into the crucible of the vacuum induction smelting furnace, and then the smelting furnace is evacuated and heated under the protection of helium gas. The temperature is raised to 750°C for 15 minutes, and the molten liquid is electromagnetically stirred for about 8 minutes after the raw materials are completely melted. Finally, the molten metal liquid is poured into a graphite crucible and...

Embodiment 2

[0064] Mg 96.6 Al 2 Zn 1 Ca 0.2 Gd 0.2 Magnesium alloy sheet (5mm thick): the batching, smelting and casting, and solution treatment steps are the same as in Example 1.

[0065] Mg 96.6 Al 2 Zn 1 Ca 0.2 Gd 0.2 Hot rolled. The magnesium alloy ingot after solution treatment is cut into a slab with a thickness of 30mm, and the surface is polished to prepare for hot rolling. The specific process of hot rolling is as follows: the slab is hot rolled after holding at 450°C for about 50 minutes. The total reduction of hot rolling is 83.3%, that is, the final thickness of the sheet is 5mm. The reduction rates of the first pass and the second pass of the hot rolling process are respectively 8% and 10%, and the reduction rates of the remaining passes are controlled at 10%-30%. Among them, the rolling reduction rates of the last two passes were 15% and 10%, respectively. Due to the rapid heat dissipation of magnesium alloy, in order to ensure the stability of the rolling temperature, afte...

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Abstract

The invention discloses a calcium-containing rare earth magnesium alloy plate with high room-temperature formability and a preparation method thereof. The specific chemical composition is: 1-3 wt% Zn, 1-3 wt% Al, 0.1-0.4 wt% Ca, 0.1-0.4 wt% Gd, 0.1-0.4 wt% Y, 0-0.2 wt% Mn, and the balance is Mg. Magnesium alloys within this composition range are cast (semi-continuous water cooling or solid mold casting) and solution treated (300-450°C, heat preservation for 12-24h and then air-cooled to room temperature), then ordinary rolling or extrusion and then rolling or isothermal forging and then rolling to make plates with a certain thickness, and finally annealed at 300-350°C for 30-60min. The magnesium alloy plate prepared by the preparation method has high formability at room temperature, good comprehensive mechanical properties, heat resistance and corrosion resistance.

Description

Technical field [0001] The invention belongs to the technical field of metallurgy, and particularly relates to a calcium-containing rare earth magnesium alloy sheet with high room temperature forming performance and a preparation method thereof. Background technique [0002] Magnesium alloy has a series of advantages such as high specific strength, high specific rigidity, good shock absorption performance, excellent electromagnetic shielding performance and easy recycling. Therefore, it has good application prospects in the fields of aerospace, automobile and electronics industry, and has the reputation of "green engineering materials in the 21st century". [0003] However, due to the close-packed hexagonal structure of magnesium alloys, the slip system is small, resulting in poor room temperature formability of magnesium alloy sheets, which hinders their application to a certain extent. Sheet formability is mainly measured by cupping value (IE value). The sheet metal cupping tes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22C23/04C22C1/03C22F1/06
CPCC22C1/03C22C23/02C22C23/04C22F1/06B21J1/02C22F3/00B21B1/026B21B27/024B21B2001/028B21B2001/225B21B2001/386
Inventor 江海涛康强张韵刘鹏董鹏徐哲柳超敏
Owner UNIV OF SCI & TECH BEIJING
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