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Rare earth magnesium alloy fabrication method

A processing method and rare earth magnesium technology, which are applied in the processing field of rare earth magnesium alloys, can solve the problems of poor high temperature mechanical properties, difficult to use for a long time, and decreased strength of magnesium alloys, and achieve good high temperature resistance mechanical properties, prolong service life and structure. symmetrical effect

Inactive Publication Date: 2017-05-10
FUSUI INST OF SCI & TECHN INFORMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary magnesium alloys have poor high-temperature mechanical properties. When the temperature rises, their strength decreases greatly, and it is difficult to use them for a long time at high temperatures.

Method used

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Experimental program
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Effect test

Embodiment 1

[0038] A processing method for a rare earth magnesium alloy, comprising the steps of:

[0039] Step 1. Using high-energy ball milling for 5 hours to obtain a mixed powder, the mixed powder is placed in a crucible of a vacuum induction melting furnace;

[0040] Step 2, vacuumize the vacuum induction melting furnace until the vacuum pressure is -50MPa, and process for 20min;

[0041] Step 3, heating the crucible under vacuum conditions at a heating temperature of 550° C. and keeping it warm for 40 minutes to obtain alloy soup;

[0042] Step 4. Under the protection of an inert gas, pour lithium nanopowder into the alloy soup, and mix evenly, then extrude, wait for it to cool, and shape it by extrusion forging to form a magnesium alloy. The extrusion ratio during this time is 10:1, and the pressure of described extrusion is 650T, and the speed of extrusion is 0.3mm / s;

[0043] Wherein, the lithium element and the aluminum element undergo a combination reaction to precipitate an ...

Embodiment 2

[0047] A processing method for a rare earth magnesium alloy, comprising the steps of:

[0048] Step 1, using high-energy ball milling of magnesium-yttrium alloy, magnesium-neodymium alloy, magnesium-dysprosium alloy, and magnesium-aluminum alloy for 6 hours to obtain a mixed powder, and then placing the mixed powder in a crucible of a vacuum induction melting furnace;

[0049] Step 2, vacuumize the vacuum induction melting furnace until the vacuum pressure is -20MPa, and process for 30min;

[0050] Step 3, heating the crucible under vacuum conditions at a heating temperature of 600°C and keeping it warm for 60 minutes to obtain alloy soup;

[0051] Step 4. Under the protection of an inert gas, pour lithium nanopowder into the alloy soup, and mix evenly, then extrude, wait for it to cool, and shape it by extrusion forging to form a magnesium alloy. The extrusion ratio during the time is 15:1, and the pressure of described extrusion is 700T, and the speed of extrusion is 0.9mm / ...

Embodiment 3

[0056] A processing method for a rare earth magnesium alloy, comprising the steps of:

[0057] Step 1. Using high-energy ball milling for 5.5 hours to obtain a mixed powder, the mixed powder is placed in a crucible of a vacuum induction melting furnace;

[0058]Step 2, vacuumize the vacuum induction melting furnace until the vacuum pressure is -30MPa, and process for 25min;

[0059] Step 3. Under vacuum conditions, the crucible is heated to a heating temperature of 575° C. and kept for 50 minutes to obtain an alloy soup;

[0060] Step 4. Under the protection of an inert gas, pour the lithium nanopowder into the alloy soup, mix it evenly, then extrude it, wait for it to cool, and shape it by extrusion forging to form a magnesium alloy, wherein the The extrusion pressure is 600T. The extrusion ratio during extrusion is 13:1, and the extrusion speed is 0.6mm / s; the inert gas is argon.

[0061] Wherein, the lithium element and the aluminum element undergo a combination reaction...

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Abstract

The invention discloses a rare earth magnesium alloy fabrication method. The method comprises the following steps that (1) magnesium-yttrium alloy, magnesium-neodymium alloy, magnesium-dysprosium alloy and magnesium-aluminum alloy are subjected to high-energy ball milling for 5-6h to obtain mixed powder, and then the mixed powder is put into a crucible of a vacuum induction smelting furnace; (2) the vacuum induction smelting furnace is subjected to vacuum pumping treatment until the vacuum pressure ranges from -50MPa to -20MPa, and treatment is conducted for 20-30min; (3) under a vacuum condition, the crucible is heated, the heating temperature ranges from 550 DEG C to 600 DEG C, heat preservation is conducted for 40-60min, and alloy soup is obtained; and (4) under inert gas protection, lithium nanometer powder is added into the alloy soup and mixed evenly; the alloy soup is extruded; when cooled down, the alloy soup is subjected to forming machining in an extrusion and forging mode to form magnesium alloy; the extrusion ratio is 10-15:1, and the extrusion speed is 0.3-0.9 mm / s; lithium elements and aluminum elements are subjected to a binding reaction so as to separate out an aluminum-magnesium phase from the magnesium alloy material; and the weight ratio of lithium nanometer powder to magnesium-yttrium alloy to magnesium-neodymium alloy to magnesium-dysprosium alloy to magnesium-aluminum alloy is 2.5-3:1:5-6:3-4:80-90 in sequence.

Description

technical field [0001] The invention relates to a processing method of a rare earth magnesium alloy. Background technique [0002] Magnesium alloy is an alloy composed of magnesium and other elements. Its characteristics are: low density (about 1.8g / cm3 magnesium alloy), high specific strength, large specific elastic modulus, good heat dissipation, good shock absorption, greater impact load capacity than aluminum alloy, and corrosion resistance to organic substances and alkalis it is good. Mainly used in aviation, aerospace, transportation, chemical industry, rocket and other industrial sectors. Ordinary magnesium alloys have poor high-temperature mechanical properties. When the temperature rises, their strength decreases greatly, and it is difficult to use them for a long time at high temperatures. Improving the high-temperature mechanical properties of magnesium alloys is an important topic in the study of magnesium alloys. Contents of the invention [0003] An objec...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C23/06
CPCC22C1/03C22C23/06
Inventor 叶金仁钟静海梁莲香苏永植
Owner FUSUI INST OF SCI & TECHN INFORMATION
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