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Treating method for improving g strength and toughness of magnesium alloy materials

A processing method and magnesium alloy technology are applied in the field of strengthening processing of magnesium alloy materials, which can solve the problems of limited strength and toughness of magnesium alloys, and difficulty in preparing high-strength and toughness magnesium alloy materials for industrial production.

Inactive Publication Date: 2013-12-25
CHANGZHOU RUNYUAN WARP KNITTING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods of enhancing the strength and toughness of magnesium alloy materials are to strengthen the strength and toughness of magnesium alloy materials by using fine grain strengthening or in-situ reaction to generate reinforcing particles during the smelting process. However, the above methods are used to improve the strength and toughness of magnesium alloy materials The ability of strength and toughness is very limited, and it is difficult to prepare high-strength and toughness magnesium alloy materials to meet the needs of industrial production. Therefore, it is urgent to find a new method to greatly improve the strength and toughness of magnesium alloy materials to meet the growing industry. need

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Use ZK61 magnesium alloy rods as samples for strengthening treatment. The weight percentage of the magnesium alloy components is Al≤0.05%, Zn: 5.0~6.0%, Mn≤0.1%, Zr: 0.3~0.9%, Si≤0.05 %, Fe≤0.05%, Cu≤0.05%, Ni≤0.005%, others: 0.31%, and the balance is Mg.

[0033] Solution treatment; the magnesium alloy bar is placed in a heat treatment furnace at 400 oC at a temperature of 3 h.

[0034] Quenching treatment; put the magnesium alloy bar after solid solution treatment into 35 o C in water and then cooled to room temperature.

[0035] Aging treatment; place the quenched magnesium alloy bar in a heat treatment furnace at 100 o C temperature for 12h, then naturally cool the magnesium alloy bar to room temperature.

[0036] Cryogenic treatment and ultrasonic field shock treatment; place the aging-treated magnesium alloy rods in a cryogenic box, start from room temperature, and cool at a rate of 1 o C / min, cooling the magnesium alloy bar to -196 o C for 12 hours at ultra...

Embodiment 2

[0040] AZ61 magnesium alloy rods are used as samples for strengthening treatment. The weight percentages of the magnesium alloy components are Al: 5.5-6.5%, Zn: 0.5-1.5%, Mn: 0.15-0.4%, Si≤0.10%, Fe ≤0.005%, Cu≤0.05%, Ni≤0.005%, others ≤0.35%, balance: Mg.

[0041] Solution treatment; the magnesium alloy bar is placed in a heat treatment furnace at 470 o C temperature for 7h.

[0042] Quenching treatment; put the magnesium alloy bar after solution treatment into 40 o C in water and then cooled to room temperature.

[0043] Aging treatment; place the quenched magnesium alloy bar in a heat treatment furnace at 150 o C temperature insulation 30h, then the magnesium alloy rods are naturally cooled to room temperature.

[0044] Cryogenic treatment and ultrasonic field shock treatment; place the aging-treated magnesium alloy rods in a cryogenic box, start from room temperature, and cool at a rate of 10 o C / min, cooling the magnesium alloy bar to -196 o C for 30 hours at ultra-...

Embodiment 3

[0048] First prepare the SiC particle reinforced AZ31 magnesium alloy rod, and then use the SiC particle reinforced AZ31 magnesium alloy rod as a sample for strengthening treatment. The weight percentage of each component of the AZ31 magnesium alloy is Al: 3.0-4.0%, Mn: 0.15 ~0.5%, Zn: 0.2~0.8%, Cu: 0.05%, Ni: 0.005%, Si: 0.15%, others: 0.37%, and the balance is Mg.

[0049] Load AZ31 magnesium alloy ingot into 720 o C crucible, enter N here 2 As a protective gas for protection, after it is completely melted, degas and remove slag; grind SiC powder into nanoparticles (particle size less than 100nm), weigh 30% of the theoretical weight of the particle reinforcement phase, fully dry, and then dry The SiC nanoparticles were put into the crucible, electromagnetic stirring and manual stirring were performed in parallel, and the stirring time was 5 min. The stirred melt is left to stand for 2~3 minutes, and the temperature rises to 720°C again. o During C, cast into diameter 100m...

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Abstract

The invention discloses a treating method for improving strength and toughness of magnesium alloy materials. The treating method for improving the strength and the toughness of the magnesium alloy materials comprises solution treatment and aging treatment, and further comprises subzero treatment after the aging treatment and ultrasonic filed shock treatment in the process of the subzero treatment. The process of the subzero treatment comprises the steps of cooling the magnesium alloy materials to ultralow temperature at minus 196DEG C from the starting room temperature at the cooling speed 1-10DEG C / min, and holding the temperature for 12-30 hours. Preferably, the ultrasonic filed shock treatment is carried out at the late period of the subzero treatment, the intensity of an ultrasonic field is 1-50Kw / m2, the frequency of the ultrasonic field is 10-40KHz, and the treating time in the ultrasonic field is 60-200 seconds. The magnesium alloy materials after the subzero treatment and the ultrasonic field shock treatment are put into an oven which is 170DEG C at temperature, the holding time is 2-6 hours, and then the magnesium alloy materials in the oven are put in air to recover to the room temperature naturally. The treating method for improving the strength and the toughness of the magnesium alloy materials enables the magnesium alloy materials to be compact in structure and high in hardness and roughness.

Description

technical field [0001] The invention relates to a strengthening treatment method for magnesium alloy materials, in particular to a treatment method for improving the strength and toughness of magnesium alloy materials. Background technique [0002] As one of the lightest metal alloy materials, magnesium alloy materials have high specific strength and specific stiffness, good thermal and electrical conductivity, damping and vibration reduction, electromagnetic shielding, and easy processing and forming. Therefore, the preparation of high-strength and tough magnesium alloy materials is Material application and development trend. [0003] From the perspective of the prior art, methods such as adding a refiner to strengthen the grains during the smelting process or forming reinforced particles through in-situ reactions are usually used to improve the mechanical properties of magnesium alloy materials. There are two existing Chinese patents for improving the strength and toughne...

Claims

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Application Information

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IPC IPC(8): C22F1/06C22F3/02
Inventor 王占洪张勋寅朱晓宏
Owner CHANGZHOU RUNYUAN WARP KNITTING MACHINERY
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