Low-cost short-process manufacture technique for high-strength rare earth magnesium alloy plate

An alloy sheet, short process technology, applied in the field of metal material processing, can solve the problems of high alloy cost, complex and time-consuming preparation process, shortened preparation process, etc., and achieve the effects of reducing rare earth content, shortening process flow, and reducing production cost

Active Publication Date: 2017-01-04
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the disadvantages of high cost and complicated and time-consuming preparation process of the existing high-strength rare earth deformed magnesium alloy, the present invention proposes a preparation technology for reducing alloy cost and shortening the preparation process to obtain a high-strength rare earth magnesium alloy plate

Method used

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  • Low-cost short-process manufacture technique for high-strength rare earth magnesium alloy plate
  • Low-cost short-process manufacture technique for high-strength rare earth magnesium alloy plate
  • Low-cost short-process manufacture technique for high-strength rare earth magnesium alloy plate

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Example 1: Put the as-cast alloy into a heat treatment furnace at 300°C for 15 minutes, the alloy composition is Gd: 2.0wt.%, Er: 0.1wt.%, Zr: 0.5wt.%, and Mg is the balance balance; Take out and place on twin-roll rolling equipment for rolling, the thickness of the alloy billet is 5mm, and the thickness after rolling is 0.25mm to obtain a total deformation of 95%, Mg 5 (Gd, Er) strengthening phase size is 200nm, Mg 5 A high-strength magnesium alloy plate with a volume fraction of (Gd, Er) strengthening phase of 1.8%, a grain size of 9 μm, a yield strength of 280 MPa, and a tensile strength of 310 MPa.

Embodiment 2

[0018] Example 2: Put the as-cast alloy into a heat treatment furnace at 550°C for 15 minutes, and the alloy composition is Gd: 6.2wt.%, Er: 0.15wt.%, Zr: 0.5wt.%, and Mg is the balance balance; Take out and place on twin-roll rolling equipment for rolling, the thickness of the alloy billet is 5mm, and the thickness after rolling is 0.75mm to obtain a total deformation of 85%, Mg 5 (Gd, Er) strengthening phase size is 260nm, Mg 5 A high-strength magnesium alloy plate with a volume fraction of (Gd, Er) strengthening phase of 5.6%, a grain size of 9 μm, a yield strength of 290 MPa, and a tensile strength of 322 MPa.

Embodiment 3

[0019] Example 3: Put the as-cast alloy into a heat treatment furnace at 400°C for 15 minutes, the alloy composition is Gd: 8.0wt.%, Er: 1.0wt.%, Zr: 0.5wt.%, and Mg is the balance balance; Take out and place on twin-roll rolling equipment for rolling, the thickness of the alloy billet is 5mm, and the thickness after rolling is 0.15mm to obtain a total deformation of 97%, Mg 5 (Gd, Er) strengthening phase size is 300nm, Mg 5 A high-strength magnesium alloy plate with a volume fraction of (Gd, Er) strengthening phase of 7.8%, a grain size of 7.5 μm, a yield strength of 350 MPa, and a tensile strength of 365 MPa.

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Abstract

The invention discloses a low-cost short-process manufacture technique for a high-strength rare earth magnesium alloy plate, belonging to the field of metal material machining. The manufacture technique is characterized in that a low-rare earth-content Mg-Gd-Er-Zr alloy ingot casting is directly subjected to hot rolling with the total pressing amount of 85-97%, so that the high-strength magnesium alloy plate with uniformly and dispersedly distributed strengthening phase Mg5 (Gd, Er) and refined grain structures (with the grain size smaller than 10 mu m) is obtained. The manufacture technique has the characteristics that cost is low; efficiency is high; and alloy strength is high. The manufacture technique can be practically applied to various bearing structure components in the fields of automobiles, aerospace and the like.

Description

technical field [0001] The invention relates to a low-cost short-process high-strength rare-earth magnesium alloy sheet preparation technology, which belongs to the field of metal material processing. Background technique [0002] Magnesium alloy has excellent properties and has many properties superior to other commonly used metal materials, such as high specific strength, high specific stiffness, good vibration damping ability, excellent thermal conductivity and electrical conductivity, good dimensional stability, electromagnetic shielding and Easy to recycle and other characteristics, known as "21st century green engineering materials". It is widely used in electronic products, electric tools, household appliances, sports equipment and leisure products, as well as aerospace fields. However, compared with other metal structural materials, the strength of magnesium alloys at room temperature is relatively low. Therefore, the development of high-strength magnesium alloys is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22F1/04
CPCC22C21/00C22F1/04
Inventor 杜文博郑晓兵王朝辉刘轲李淑波
Owner BEIJING UNIV OF TECH
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