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Magnesium alloy with special extruded bar texture and preparation method thereof

A magnesium alloy and rod technology, which is applied in the field of magnesium alloy materials, can solve the problems of the huge difference between tensile and compressive yield strength, etc., and achieve the effects of improving mechanical properties, reasonable process design, and improving anisotropy

Active Publication Date: 2021-07-09
SHANGHAI SPACE PRECISION MACHINERY RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the tensile and compressive yield strengths of the existing magnesium alloy rods have a large difference due to their strong basal surface texture, and provide a material with reasonable design, simple operation, and a Novel magnesium alloy extruded rod texture and its preparation method to achieve the purpose of improving the tensile and compression asymmetry of magnesium alloy rods

Method used

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  • Magnesium alloy with special extruded bar texture and preparation method thereof
  • Magnesium alloy with special extruded bar texture and preparation method thereof
  • Magnesium alloy with special extruded bar texture and preparation method thereof

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preparation example Construction

[0025] A method for preparing a magnesium alloy with a special extruded rod texture, comprising the following steps:

[0026] S1. According to the above metal content, the prepared billet is subjected to solution treatment and water quenching;

[0027] S2. Carry out extrusion pretreatment to the ingot after solid solution treatment, and heat it to a specified temperature in a heating furnace;

[0028] S3. Back-extruding and cooling the obtained pretreated sample to obtain a special magnesium alloy rod texture.

[0029] Preferably, the solution treatment temperature in the step S1 is 500-550° C., and the time is 8-16 hours.

[0030] Preferably, the heating temperature in the step S2 is 400-460°C.

[0031] Preferably, the extrusion speed in the step S3 is 0.1-1.0 m / s, and the extrusion temperature is 400-450°C.

[0032] Preferably, the extrusion ratio in the step S3 is 1:30-80. If the extrusion ratio is less than 1:30, the specific texture cannot be formed. If the extrusion r...

Embodiment 1

[0035] A magnesium alloy with a special extruded bar texture, the components and their mass percentages in the magnesium alloy are: Gd: 13%; the balance is Mg.

[0036] A method for preparing a magnesium alloy with a special extruded rod texture, comprising the following steps:

[0037] (1) Solid solution treating the prepared original ingot at 530° C. for 8 hours, and water quenching;

[0038] (2) Carry out extrusion pretreatment to the billet after solid solution treatment, heat in the electromagnetic induction heating furnace, the electromagnetic induction heating temperature is 440 ℃;

[0039] (3) Back-extrude the billet after pretreatment, the extrusion temperature is 450°C, the extrusion speed is 0.6m / s, the extrusion ratio is 1:60, and it is naturally cooled in the air.

[0040] Depend on figure 1 and figure 2 It is known that the grain refinement of the magnesium alloy sheet after extrusion is from 500 μm to below 30 μm, by image 3 It is known that the texture of...

Embodiment 2

[0042] A magnesium alloy with a special extruded bar texture. The components and their mass percentages in the magnesium alloy are: Gd: 18%, Nd: 5%, Zr: 1%, and the balance is Mg.

[0043] A method for preparing a magnesium alloy with a special extruded rod texture, comprising the following steps:

[0044] (1) Solid solution treating the prepared original ingot at 530° C. for 16 hours, and water quenching;

[0045] (2) Carry out extrusion pretreatment to the billet after solid solution treatment, heat in the electromagnetic induction heating furnace, the electromagnetic induction heating temperature is 440 ℃;

[0046] (3) Back-extrude the billet after pretreatment, the extrusion temperature is 450°C, the extrusion speed is 0.8m / s, the extrusion ratio is 1:60, and it is naturally cooled in the air.

[0047] After extrusion, the grain refinement of the magnesium alloy sheet is from 200 μm to below 30 μm. The alloy texture is (0002) plane perpendicular to the extrusion direction...

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Abstract

The invention discloses a magnesium alloy with a special extruded rod texture and a preparation method thereof, belonging to the technical field of magnesium alloys. Each component of the magnesium alloy and its mass percentage content are: Gd or Dy13-18%; Nd is 0-5%; Zr is 0-1%; the balance is Mg. The preparation method of the magnesium alloy is to prepare The ingot is solution treated at 500-550°C for 8-16 hours, and quenched in water; then the solution-treated ingot is subjected to extrusion pretreatment and heated in an electromagnetic induction heating furnace, and finally the pretreated sample is processed in the Reverse extrusion at 400-460°C, due to a large number of rare earth solid-solution atoms, greatly changes the extrusion texture of magnesium alloy rods, mainly texture, the process design of the invention is simple, the operation process is easy to realize, and overcomes the problem The behavior of mechanical anisotropy is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy materials, and specifically discloses a magnesium alloy with a special extruded rod texture and a preparation method thereof. Background technique [0002] In recent years, my country's aerospace and aviation industries have developed rapidly. In order to reduce the weight as much as possible, high-performance lightweight materials and advanced manufacturing processes have been continuously used in structural design. Materials, processes and aerospace vehicle lightweight structures are constantly developing under mutual promotion. As the lightest metal structural material currently available, magnesium alloys have broad prospects for development in the aerospace field. In the past few decades, high-performance magnesium alloys such as high strength and high creep resistance have been continuously developed, and their application range has been greatly expanded. [0003] Magnesium alloys c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22F1/06
CPCC22C23/06C22F1/002C22F1/06
Inventor 徐玉棱周海涛孙京丽肖旅李中权
Owner SHANGHAI SPACE PRECISION MACHINERY RES INST
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