Preparation method of magnesium alloy with good room-temperature plasticity and product

A magnesium alloy, room temperature technology, applied in the field of alloy preparation

Active Publication Date: 2017-05-10
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The most common twinning mechanism in magnesium alloys is stretch twins, compression twins and Secondary twins, in the research on twins in recent years, researchers mainly focus on The effect of tensile twinning and tensile twinning on the deformation and mechanical properties of magnesium alloys, but there are few research reports on the effects of compression twinning and secondary twinning on room temperature deformation and mechanical properties of magnesium alloys

Method used

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  • Preparation method of magnesium alloy with good room-temperature plasticity and product
  • Preparation method of magnesium alloy with good room-temperature plasticity and product
  • Preparation method of magnesium alloy with good room-temperature plasticity and product

Examples

Experimental program
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Effect test

Embodiment 1

[0060] A method for preparing a magnesium alloy with good room temperature plasticity, comprising the following steps: in parts by weight, taking 94.8 parts of Mg ingots with a purity of 99.9wt.%, 4.1 parts of Zn ingots with a purity of 99.9wt.%, Mg- 1.0 parts of 30Y master alloy and 0.2 parts of Mg-30Zr master alloy were put into a crucible for melting to obtain alloy liquid; then the casting temperature was controlled at 750°C, and the alloy liquid was cast into the graphite mold of the vacuum directional solidification equipment, and the insulation cover was kept warm. The temperature of the insulation jacket is kept consistent with the casting temperature; then the pull-down is performed by controlling the pulling speed of the pull-down system to 5mm / min, and the water-cooling system maintains a constant temperature of 5°C. The crystal face grows, and finally solidifies to obtain a magnesium alloy with good room temperature plasticity. According to the mass percentage, the...

Embodiment 2

[0062] A method for preparing a magnesium alloy with good room temperature plasticity, comprising the following steps: in parts by weight, taking 91.3 parts of Mg ingots with a purity of 99.9wt.%, 6.1 parts of Zn ingots with a purity of 99.9wt.%, Mg- 2.0 parts of 30Y master alloy and 0.7 parts of Mg-30Zr master alloy, take Mg ingot with a purity of 99.9wt.%, Zn ingot with a purity of 99.9wt.%, Mg-30Y master alloy and Mg-Zr master alloy, and put them into a crucible Melting is carried out to obtain alloy liquid; then the casting temperature is controlled at 850°C, and the alloy liquid is cast into the graphite mold of the vacuum directional solidification equipment, and the insulation cover is kept warm, and the temperature of the insulation cover is consistent with the casting temperature; Pull down at a speed of 25mm / min. The water cooling system maintains a constant temperature of 5°C. The water cooling system and the temperature of the alloy liquid form a temperature gradien...

Embodiment 3

[0064] A method for preparing a magnesium alloy with good room temperature plasticity, comprising the following steps: in parts by weight, taking 93.4 parts of Mg ingots with a purity of 99.9wt.%, 4.9 parts of Zn ingots with a purity of 99.9wt.%, Mg- 1.5 parts of 30Y master alloy and 0.3 parts of Mg-30Zr master alloy, take Mg ingot with a purity of 99.9wt.%, Zn ingot with a purity of 99.9wt.%, Mg-30Y master alloy and Mg-Zr master alloy, and put them into a crucible Melting is carried out to obtain alloy liquid; then the casting temperature is controlled to 780°C, and the alloy liquid is cast into the graphite mold of the vacuum directional solidification equipment, and the insulation cover is kept warm, and the temperature of the insulation cover is consistent with the casting temperature; Pull down at a speed of 10mm / min. The water cooling system maintains a constant temperature of 5°C. The water cooling system and the temperature of the alloy liquid form a temperature gradien...

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Abstract

The invention discloses a preparation method of magnesium alloy with good room-temperature plasticity. The preparation method comprises the following steps: taking Mg ingot with the purity of 99.9wt%, Zn ingot with the purity of 99.9wt%, Mg-30Y intermediate alloy and Mg-30Zr intermediate alloy, putting the alloys into a crucible, and melting to obtain alloy liquid; then controlling casting temperature, casting the alloy liquid into a graphite mould of vacuum directional solidification equipment, carrying out heat preservation by virtue of a heat preservation sleeve; pulling down by controlling the pulling speed of a pull-down system, promoting cast alloy to grow on a specific preferential growth crystal face, and finally solidifying, thus obtaining the magnesium alloy. A columnar crystal structure prepared by adopting the preparation method disclosed by the invention has the advantages that primary arms grow in parallel, longitudinal crystal boundary is straight, no transverse crystal boundary exists, specific grain orientation is specific, preferential growth crystal face and growth direction are described in the specification, and the space between the primary arms is about 50 micrometers; sigmab of the magnesium alloy at room temperature is 188MPa, and elongation reaches up to 24%.

Description

technical field [0001] The invention relates to a preparation method and product of a magnesium alloy with good room temperature plasticity, and specifically belongs to the technical field of alloy preparation. Background technique [0002] Lightweight has huge economic, environmental and social benefits to the automotive industry, high-speed railways, aerospace and other fields. Magnesium alloys, as the lightest metal structural materials, have great potential for lightweighting, and have attracted great interest and widespread attention from scholars all over the world from application development to basic research. [0003] Magnesium has a hexagonal close-packed (HCP) crystal structure, and its plastic deformation mechanism is basal plane, cylindrical plane, cone sliding and cone twinning. Base only at room temperature Two independent slip systems are activated, and there is no sufficient independent deformation mechanism that can coordinate the C-axis deformation, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/04C22C1/03C22C23/04
CPCB22D27/045C22C1/03C22C23/04
Inventor 樊志斌董允林小娉谢宏斌印策李婵苗琳坤彪捷赵靖怡
Owner 东北大学秦皇岛分校
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