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Fabrication method of large-size block nano magnesium alloy

A nano-magnesium and large-size technology, which is applied in the field of large-size bulk nano-magnesium alloy preparation, can solve the problems of small sample size, small size of nano-magnesium alloy, difficult application, etc., and achieves the effect of simple process flow and low cost.

Active Publication Date: 2014-04-16
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Magnesium alloys are mostly prepared by mechanochemical grinding and surface machining, but the nano-magnesium alloys prepared by mechanochemical grinding and surface machining are small in size, and there is no report showing the preparation of large-sized bulk nano-magnesium alloys and characterizing their tensile strength at room temperature. performance, and the small sample size makes it difficult to apply

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  • Fabrication method of large-size block nano magnesium alloy
  • Fabrication method of large-size block nano magnesium alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0017] The magnesium alloy semi-continuous casting billet (the alloy composition is (w%): Gd: 8%, Y: 4%, Zr: 0.5%, the rest is Mg and impurity elements that cannot be removed) is pre-extruded, extruded The temperature is 450°C, the extrusion speed is 20mm / s, and the extrusion ratio is 50; the pre-extruded magnesium alloy is subjected to rapid cold forging, the forging temperature is 100°C, the pass deformation is 1.6%, and the total deformation is 39%; Finally, a nano-magnesium alloy with an average grain size of 50 nm is obtained, and the size of the nano-magnesium alloy product is: 2 mm in diameter and 2000 mm in length. Part of the obtained nano-magnesium alloy was subjected to aging heat treatment, and the mechanical properties of the nano-magnesium alloy were tested according to GB / T228-2002. The tensile strength of the nano-magnesium alloy product was: 647MPa before aging and 749MPa after aging; the yield strength was: 585MPa before aging , 710MPa after aging; elongation...

Embodiment 2

[0019] The magnesium alloy semi-continuous casting billet (the alloy composition is (w%): Gd: 10%, Y: 6%, Zr: 0.4%, the rest is Mg and impurity elements that cannot be removed) is pre-extruded, extruded The temperature is 440°C, the extrusion speed is 19mm / s, and the extrusion ratio is 45; the pre-extruded magnesium alloy is subjected to rapid cold forging, the forging temperature is 75°C, the pass deformation is 2.9%, and the total deformation is 30%; Finally, a nano-magnesium alloy with an average grain size of 70 nm is obtained, and the size of the nano-magnesium alloy product is: 2 mm in diameter and 2000 mm in length. Part of the obtained nano-magnesium alloy is subjected to aging heat treatment, and the mechanical properties of the nano-magnesium alloy are tested according to GB / T228-2002. The tensile strength of the nano-magnesium alloy product is: 634MPa before aging and 739MPa after aging; the yield strength is: 569MPa before aging , 692MPa after aging; elongation aft...

Embodiment 3

[0021] The magnesium alloy semi-continuous casting billet (the alloy composition is (w%): Gd: 12%, Y: 3%, Zr: 0.7%, the rest is Mg and impurity elements that cannot be removed) is pre-extruded, extruded The temperature is 420°C, the extrusion speed is 18mm / s, and the extrusion ratio is 30; the pre-extruded magnesium alloy is subjected to rapid cold forging, the forging temperature is 60°C, the pass deformation is 3.6%, and the total deformation is 25%; Finally, a nano-magnesium alloy with an average grain size of 90 nm is obtained, and the size of the nano-magnesium alloy product is: 3 mm in diameter and 2000 mm in length. Part of the obtained nano-magnesium alloy is subjected to aging heat treatment, and the mechanical properties of the nano-magnesium alloy are tested according to GB / T228-2002. The tensile strength of the nano-magnesium alloy product is: 610MPa before aging and 710MPa after aging; the yield strength is: 547MPa before aging , 675MPa after aging; elongation aft...

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Abstract

The invention relates to a fabrication method of a large-size block nano magnesium alloy. The alloy comprises the following components in mass percentage: 6-13% of Gd, 2-6% of Y, 0.3-0.8% of Zr, and the balance of Mg and nonremovable impurity elements. of the fabrication method comprises the steps that a magnesium alloy blank is pre-extruded at 400-450 DEG C and 18-20mm / s, the extrusion ratio is 30-50, the pre-extruded magnesium alloy is subjected to cold forging rapidly at 10-100 DEG C, the pass deformation is 1-8%, and the total deformation is 10-40%. The fabricated nano magnesium alloy is 40-100nm in average grain size, 1-4mm in diameter and 100-2000mm in length. The nano magnesium alloy is subjected to mechanical property testing or aged mechanical property testing, the tensile strength at the room temperature is 610-749Mpa, the yield strength is 547-710Mpa, and the elongation percentage after fracture is 3.8-10%.

Description

technical field [0001] The invention relates to the field of nanomaterial preparation, in particular to a method for preparing a large-size block nano-magnesium alloy. Background technique [0002] Nanomaterials have been used in many high-tech fields due to their excellent physical, chemical and mechanical properties, and have penetrated into all aspects of life. Magnesium alloy is one of the materials with the highest specific strength and specific stiffness among similar metal materials. It has very good damping performance, high temperature creep performance, dimensional stability and good cold and hot processing performance. It has been widely used in aerospace, automobile and other fields. It has been widely used and attracted extensive attention from scholars at home and abroad. Therefore, the application of nanotechnology to the preparation of magnesium alloys will further improve the properties of magnesium alloys. [0003] At present, the preparation methods of m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/06C22C23/06
Inventor 刘楚明万迎春唐蓓陈志永邹利民
Owner CENT SOUTH UNIV