Forging process of nearly-isotropic, high-strength and high-plasticity Mg-Gd-Y-Zr alloy material

An isotropic, alloy material technology, applied in metal processing equipment and other directions, can solve the problems of low production efficiency, poor comprehensive mechanical properties, high cost, and achieve the effects of convenient operation, comprehensive mechanical properties improvement, and heat loss reduction.

Pending Publication Date: 2022-05-17
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the shortcomings of rare earth magnesium alloy forging such as low production efficiency, high cost, and poor comprehensive mechanical properties, the present invention provides a forging process for nearly isotropic, high-strength, and high-plasticity Mg-Gd-Y-Zr alloy materials. Low process cost and high forging efficiency

Method used

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  • Forging process of nearly-isotropic, high-strength and high-plasticity Mg-Gd-Y-Zr alloy material
  • Forging process of nearly-isotropic, high-strength and high-plasticity Mg-Gd-Y-Zr alloy material
  • Forging process of nearly-isotropic, high-strength and high-plasticity Mg-Gd-Y-Zr alloy material

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Embodiment 1

[0042] This embodiment adopts Mg-6.0Gd-3.0Y-0.5Zr (GW63K) alloy, the weight percentage of the alloy composition is Gd: 6.0%, Y: 3.0%, Zr: 0.5%, and the magnesium content is the balance balance, which is abbreviated as GW63K. Cut out two 70×70×70mm cube block materials from the GW63K alloy ingot, solid solution at 480°C for 8h and air-cool, keep at 420°C for 60min, and then perform multi-directional hammer forging on an industrial air hammer, that is, 1. 2, 3 three directions of cyclic loading, block sample 2 hammer forging 160 (70+70+20) passes, the symbol "+" means short-term annealing ~ 5min during the forging process, the entire process takes about 15min, and the forging is over The temperature is 300-350°C, and the final sample is air-cooled. There is no defect on the surface sample after hammer forging, and the difference between the size of the sample in three directions and the size of the original sample is not more than 20%, such as image 3 (a) and 3(b), image 3(c...

Embodiment 2

[0046] This embodiment adopts Mg-5.0Gd-2.0Y-0.5Zr (GW52K) alloy, the weight percentage of the alloy composition is Gd: 4.96%, Y: 2.44%, Zr: 0.43%, the magnesium content is the balance balance, abbreviated as GW52K. Five 70×70×70mm cube samples were cut out from the GW52K magnesium alloy ingot, and were solid solutioned at 480°C for 8h and air-cooled. Before forging, the sample was kept at 430°C for 60 minutes, and then multi-directional hammer forging was performed on an industrial air hammer. The cubic sample 2 was hammered for 170 (70+70+30) passes, and the symbol "+" represented short-term forging during forging. Annealing ~ 5 minutes, block sample 4 hammer forging 200 passes, block samples 3 and 5 hammer forging 200 (100+100) passes, the whole process takes about 15 minutes, the forging end temperature is 300-350 ° C, the surface of the sample is intact , no cracks, such as Figure 5 shown. After hammer forging, the grain size is reduced from 100 μm before processing to ...

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Abstract

The invention discloses a forging process of a near-isotropic, high-strength and high-plasticity Mg-Gd-Y-Zr alloy material, and belongs to the technical field of metal material plastic processing. The process comprises the following steps of: cutting a solid-solution Mg-(0.1-16) Gd-(0.1-12) Y-(0-1.0) Zr (wt.%) alloy into block ingot blanks in a certain shape (a hexahedral cube or other inequilateral hexahedrons (3 axial directions), a hexagonal prism, an equilateral or inequilateral octahedron (4 axial directions), a cylinder or equilateral or inequilateral polyhedrons (5 axial directions and more)); and the block is subjected to circulating high-speed hammering and forging at a certain temperature in the multiple axial directions (the axial directions are larger than or equal to 3) of the block, forging is conducted for 30 passes or above in the multiple axial directions, annealing is conducted for 5-600 min, then forging continues, and after forging is conducted for several times continuously, the total pass reaches 100 passes or above. The Mg-Gd-Y-Zr alloy material forged by the method has a weak texture, and has the advantages of near isotropy, high strength and high plasticity.

Description

technical field [0001] The invention relates to the technical field of plastic processing of metal materials, in particular to a forging process of a nearly isotropic, high-strength, high-plasticity Mg-Gd-Y-Zr alloy material. Background technique [0002] Due to the advantages of low density, high specific strength, excellent shock absorption performance, and good thermal conductivity, magnesium alloys have broad application prospects in the fields of automobiles, electronics, communications, and aerospace. However, the magnesium alloy with hexagonal close-packed structure has only two independent slip systems at the basal plane at room temperature, and its critical shear stress is small (~10MPa), so the room temperature strength and plasticity of the magnesium alloy are limited. By adding rare earth elements to magnesium alloys, its comprehensive mechanical properties can be significantly improved, and rare earth magnesium alloys with high strength and good high temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00C22C23/06C22F1/06
CPCB21J5/008C22F1/06C22C23/06
Inventor 陈荣石卢松鹤吴迪
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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