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Method for preparing magnesium alloy bar with superhigh intensity by powerful deformation

A magnesium alloy, ultra-high-strength technology, applied in the deformation field of magnesium alloy, can solve the problems of small size of powder metallurgy products, cannot meet the needs of large components and structural diversification, and achieve the effect of large degree of work hardening

Inactive Publication Date: 2011-11-09
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small size of powder metallurgy products, it cannot meet the requirements of preparing large-scale components and diversifying structures. Therefore, it is inevitable to seek a new method for preparing large-scale ultra-high-strength magnesium alloys. Explore and develop a technology for preparing super-strong magnesium alloys has great significance

Method used

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  • Method for preparing magnesium alloy bar with superhigh intensity by powerful deformation
  • Method for preparing magnesium alloy bar with superhigh intensity by powerful deformation
  • Method for preparing magnesium alloy bar with superhigh intensity by powerful deformation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] a. Pre-deform the semi-continuous casting ingot (with a diameter of Φ97mm and a length of 5000mm) into a rod (with a size of Φ22mm.

[0016] b. The pre-deformed bar is strongly and rapidly compressed and deformed at room temperature. The radial compression speed of the hammer head is 3 times per second, the axial movement speed is 1500mm per minute, and the motor power is 15KW. The shrinkage rate is 21.44%;

[0017] c. After strong deformation, the bar is subjected to isothermal aging at 220°C, and the aging time is 20h;

[0018] After aging treatment, the mechanical performance test was carried out according to GB / T228-2002, the results are shown in Table 1, and the macroscopic photos of the products are shown in figure 1 .

Embodiment 2

[0020] a. Pre-deform the semi-continuous casting ingot (diameter Φ97mm, length 5000mm) into a bar (size Φ22mm).

[0021] b. The pre-deformed bar is strongly and rapidly compressed and deformed at room temperature. The radial compression speed of the hammer head is 3 times per second, the axial movement speed is 1500mm per minute, and the motor power is 15KW. The shrinkage rate is 36.73%;

[0022] c. After strong deformation, the bar is subjected to isothermal aging at 180°C, and the aging time is 100h;

[0023] After aging treatment, the mechanical performance test is carried out according to GB / T228-2002, the results are shown in Table 1, and the macroscopic photos of the product are shown in figure 1 .

[0024] Table 1 Tensile mechanical properties of strongly deformed magnesium alloys at room temperature

[0025]

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Abstract

The invention relates to a method for preparing a magnesium alloy bar with superhigh intensity by powerful deformation of a magnesium alloy with superhigh intensity. The bar comprises the following alloying ingredients in percentage by weight: 6 to 13 percent of Gd, 2 to 6 percent of Y, 0.3 to 0.8 percent of Zr, and the balance of Mg and inevitable impurity elements. The method comprises the following specific steps of: performing predeformation on a magnesium alloy semi-continuous casting blank to form the bar; and preparing the magnesium alloy with superhigh intensity by a powerful deformation method. The alloy can be subjected to obvious work hardening due to quick powerful deformation, so that the tensile strength of the alloy is more than 600MPa, the yield strength is more than 540MPa, and the elongation is more than 1 percent by matching with appropriate isothermal aging after the work hardening. Therefore, the requirements of the fields such as transportation, communication electronics, aerospace and the like on the magnesium alloy with superhigh intensity can be met and the application range of the magnesium alloy can be enlarged.

Description

technical field [0001] The invention relates to the deformation field of magnesium alloys, in particular to a technology for preparing ultra-high-strength magnesium alloy rods by strong deformation. Background technique [0002] Magnesium alloy is the lightest metal structure material available, which has the advantages of low density, high specific strength, good thermal conductivity, strong shock absorption capacity, easy cutting, recyclability and stable size. In the field of aerospace, the specific power can be increased by about 30% for every 1g reduction in the mass of the aircraft; while the shell and frame of electrical products must have good thermal conductivity, shock absorption and electromagnetic shielding; the transportation industry also requires energy saving and emission reduction. The weight of transportation means is reduced; this shows that magnesium alloy has become a material with great development potential in the 21st century. However, due to its low...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/06C22C23/04
Inventor 刘楚明万迎春舒心高永浩李慧中陈志永
Owner CENT SOUTH UNIV
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