A kind of preparation method of high plasticity heat deformation rare earth magnesium alloy

A technology of hot deformation and rare earth magnesium, applied in the field of magnesium alloys, can solve the problems of increasing recrystallized structure, possessing strength, difficult to achieve high plasticity, etc., and achieve the effect of weakening the basal texture, improving strength and plasticity, and reducing casting defects

Active Publication Date: 2021-10-22
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art, solve the technical problem that the existing magnesium alloy materials have strength and at the same time it is difficult to achieve high plasticity, and provide a method for preparing a high-plasticity heat-deformable rare earth magnesium alloy. After the material is subjected to multi-directional forging, heating and extrusion deformation treatment, the dynamic recrystallization grain size is refined and the proportion of recrystallization structure is increased at the same time, so that the strength of the alloy can reach 300MPa level, and the elongation can reach more than 30%.

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  • A kind of preparation method of high plasticity heat deformation rare earth magnesium alloy
  • A kind of preparation method of high plasticity heat deformation rare earth magnesium alloy
  • A kind of preparation method of high plasticity heat deformation rare earth magnesium alloy

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0028] The ratio of the prepared magnesium alloy in this example is: 4%Zn, 0.5%Ca, 2%Gd and 93.5%Mg.

[0029] A method for preparing a high-plasticity heat-deformable rare-earth magnesium alloy, comprising the following steps:

[0030] S1. Select raw materials according to the weight percentage content. The mass ratio of magnesium block, zinc grain, Mg-Gd master alloy and pure calcium is 91.5:4:2:0.5; coat the coating agent evenly on the inner wall of the melting furnace, and The outer surface of the block is evenly coated with covering agent;

[0031] S2. The magnesium block is placed in the smelting furnace through the crucible, the door of the smelting furnace is closed, the protective gas is introduced into the smelting furnace, the temperature of the smelting furnace is raised to 780°C and kept warm until the magnesium block is completel...

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Abstract

The invention discloses a preparation method of a high-plastic hot-deformation rare-earth magnesium alloy, which relates to the technical field of magnesium alloys and solves the technical problem that it is difficult to simultaneously realize high strength and high plasticity of existing magnesium alloy materials. The magnesium alloy material of the present invention can improve the plasticity while ensuring the strength of the magnesium alloy, refine the dynamic recrystallization grain size through multidirectional forging and extrusion deformation, and increase the recrystallization rate at the same time, making up for the low strength and extrusion of multidirectional forging alloys. The low elongation rate of the as-state alloy has two shortcomings, and the strength and elongation rate are improved simultaneously, so that the elongation rate of the alloy can reach more than 30% under the premise of the strength of the alloy at 300MPa level.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloys, and in particular relates to a preparation method of a high-plasticity hot-deformation rare-earth magnesium alloy. Background technique [0002] Magnesium alloys have the characteristics of low density, high specific strength and specific stiffness, and have obvious advantages in the application of modern metal lightweight, but poor plasticity and deformation ability restrict the wide application of magnesium alloys. On this basis, hot extrusion deformation treatment of magnesium alloy materials can eliminate casting defects and refine grains to improve the performance of magnesium alloys. However, although the metal after hot extrusion deformation has excellent strength, its plasticity is still at a low level. After the multi-directional forging treatment of magnesium alloy, the grain refinement can also be achieved, and the texture can be weakened at the same time, which can significa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04C22C1/03C22C1/06C22F1/06B21C31/00B21C43/00B21J5/00
CPCB21C31/00B21C43/00B21J5/002C22C1/03C22C1/06C22C23/04C22F1/06
Inventor 邓坤坤代仁杰王翠菊聂凯波王晓军
Owner TAIYUAN UNIV OF TECH
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