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Calcium-containing rare earth magnesium alloy plate with high room temperature forming property and preparation method

A technology for deforming magnesium alloys and magnesium alloys, applied in metal rolling, metal rolling, metal processing equipment and other directions, can solve problems such as increasing production costs, and achieve the effects of improving ignition point, improving mechanical properties, and improving room temperature formability

Active Publication Date: 2018-07-20
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

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  • Calcium-containing rare earth magnesium alloy plate with high room temperature forming property and preparation method
  • Calcium-containing rare earth magnesium alloy plate with high room temperature forming property and preparation method
  • Calcium-containing rare earth magnesium alloy plate with high room temperature forming property and preparation method

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preparation example Construction

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

[0051] Step 1, batching: 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 alloys, magnesium-gadolinium master alloys, magnesium-yttrium master alloys, magnesium-manganese master alloys;

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

[0053] Step 3, solution treatment: heat the magnesium alloy ingot obtained in the second step at 300-450° C. for 12-...

Embodiment 1

[0057] Mg 96.6 Al 2 Zn 1 Ca 0.2 Gd 0.2 Magnesium alloy plate (1mm thick): raw materials are weighed according to the mass percentage of the components, the raw materials are: 99.99% by mass percentage of magnesium ingot, 99.9% by mass percentage of aluminum ingot, 99.99% by mass percentage of zinc ingot, 30% by mass % magnesium-calcium master alloy and 30% by mass of 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. Raise the temperature to 750°C and keep it warm for 15 minutes. After the raw materials are completely melted, electromagnetically stir the molten liquid for about 8 minutes. Finally, the molten meta...

Embodiment 2

[0064] Mg 96.6 Al 2 Zn 1 Ca 0.2 Gd 0.2 Magnesium alloy plate (5 mm thick): batching, smelting and casting, 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 solution-treated magnesium alloy ingot is wire-cut into slabs 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 being kept at 450° C. for about 50 minutes. The total hot rolling reduction is 83.3%, that is, the final thickness of the plate is 5mm. The first and second passes of the hot-rolling process have reduction ratios of 8% and 10% respectively, and the reduction ratios of the remaining passes are controlled at 10%-30%. Among them, the last two rolling reductions are 15% and 10% respectively. Due to the fast heat dissipation of magnesium alloys, in order to ensure the stability of the rolling temperature, after each pass of rolling, t...

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Abstract

The invention discloses a calcium-containing rare earth magnesium alloy plate with a high room temperature forming property and a preparation method of the calcium-containing rare earth magnesium alloy plate. The calcium-containing rare earth magnesium alloy plate with the high room temperature forming property comprises the following specific chemical components: 1-3 wt% of Zn, 1-3 wt% of Al, 0.1-0.4 wt% of Ca, 0.1-0.4 wt% of Gd, 0.1-0.4 wt% of Y, 0-0.2 wt% of Mn and the balance of Mg. The preparation method comprises the following steps: carrying out casting (semi-continuous water-cooling orsolid die casting) and solution treatment (insulating for 12-24 hours at the temperature of 300-450 DEG C and then air-cooling to the room temperature) on magnesium alloy in the component range; thenpreparing a plate with a certain thickness by processes including common rolling or extruding and then rolling or isothermal forging and then rolling and the like; and finally annealing for 30-60 minutes at the temperature of 300-350 DEG C. The magnesium alloy plate prepared by the preparation method has high room temperature forming property, and good comprehensive mechanical property, heat resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a calcium-containing rare earth magnesium alloy plate with high room-temperature formability and a preparation method thereof. Background technique [0002] Magnesium alloy has a series of advantages such as high specific strength, high specific stiffness, good shock absorption performance, excellent electromagnetic shielding performance and easy recycling. Therefore, it has good application prospects in the fields of aerospace, automobile and electronic 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 and few slip systems, the room temperature formability of magnesium alloy sheets is not good, and its application has been hindered to a certain extent. Sheet formability is mainly measured by cupping value (IE value). Sheet metal cupping test, wh...

Claims

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Application Information

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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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