CN100532621C - Method for increasing magnesium alloy mechanical property - Google Patents
Method for increasing magnesium alloy mechanical property Download PDFInfo
- Publication number
- CN100532621C CN100532621C CNB200710010339XA CN200710010339A CN100532621C CN 100532621 C CN100532621 C CN 100532621C CN B200710010339X A CNB200710010339X A CN B200710010339XA CN 200710010339 A CN200710010339 A CN 200710010339A CN 100532621 C CN100532621 C CN 100532621C
- Authority
- CN
- China
- Prior art keywords
- magnesium alloy
- pulsed current
- sup
- handled
- mechanical property
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Electroplating Methods And Accessories (AREA)
Abstract
The invention relates to an improved technology for magnesium alloy property, to be specific, is a method for improving magnesium alloy mechanical property. Pulsed current treating the magnesium alloy, the pulse current discharge cycle is 1 mus to 1000 mus, the maximum peak current density is 10<SUP>3</SUP> to 10<SUP>5</SUP>A/mm<SUP>2</SUP>, the single impulse length is 1 mus to 10000 mus. The characteristic of the technology is: the plastic property of the magnesium alloy is improved without lowering the strength after pulsed current treating. The invention is easy to operate, highly efficient, low-cost, and convenient for popularization and application.
Description
Technical field:
The present invention relates to the improvement technology of magnesium alloy performance, be specially a kind of method that improves magnesium alloy mechanical property.
Background technology:
Magnesium alloy is as a kind of structured material, has that density is low, specific tenacity is high, than characteristics such as hardness height, has been widely used in aerospace, automotive industry, space and national defence field, and electronics with industry such as communicate by letter.But because magnesium alloy is close-packed hexagonal (hcp) structure, plastic deformation ability and press working forming property are all relatively poor, become the main research direction of investigators so improve the mechanical property of magnesium alloy at present.And utilize the pulsed current method to improve the comprehensive mechanical property of magnesium alloy, also do not appear in the newspapers as yet at present.
Summary of the invention:
The object of the present invention is to provide a kind of method that improves magnesium alloy mechanical property.After present method processing, the plasticity of magnesium alloy is improved, and intensity does not reduce substantially.
To achieve these goals, technical scheme of the present invention is: treatment process is that pulsed current is handled.The discharge cycle 1 μ s～1000 μ s of pulsed current, peak inrush current density 10
3～10
5A/mm
2, the time length 1 μ s～10000 μ s of individual pulse, the time that pulsed current is handled is the time length of individual pulse.The method of raising magnesium alloy mechanical property provided by the invention, the preferable parameter of its pulsed current is: discharge cycle is 50 μ s～500 μ s, and peak inrush current density is 3 * 10
3～4 * 10
4A/mm
2, the time length 200 μ s～2500 μ s of individual pulse.
Principle of the present invention is: utilize pulsed current that the magnesium alloy of different states is handled, the magnesium alloy grain-size after the processing is only grown up a little, obvious variation does not take place in texture, thereby the sample strength after the processing is not reduced substantially.And pulsed current has increased the ratio of the inner big angle of magnesium alloy crystal boundary after handling, and pulsed current can reduce the defect concentration of material internal, as: reduce dislocation desity, reduce hole, healed cracks or the like.So the magnesium alloy plasticity after handling can obviously improve.
The invention has the advantages that:
1, through after the pulsed current processing, can improve the plasticity of magnesium alloy, and not reduce its intensity substantially.
2, adopt the present invention simple to operate, the cycle is short, the efficient height, and cost is low, and is easy to utilize.
Description of drawings:
Fig. 1 is the device synoptic diagram of pulsed current treating processes.
Fig. 2 is for handling the oscillogram of the used pulsed current of sample.
Fig. 3 is the stress strain curve before embodiment 1 sample is handled the back and handled.
Fig. 4 is the stress strain curve before embodiment 2 samples are handled the back and handled.
Fig. 5 is the stress strain curve before embodiment 3 samples are handled the back and handled.
Fig. 6 is the stress strain curve before embodiment 4 samples are handled the back and handled.
Embodiment:
Below by embodiment in detail the present invention is described in detail.
Material therefor is the AZ31 magnesium alloy through 4 equal channel angular extrusion process, and the sample significant part is of a size of: 6mm * 4mm * 1.5mm.As shown in Figure 1, sample 1 two ends are clamped between the copper electrode 2, again two copper electrodes 2 are linked to each other with the positive and negative electrode of impulse current generator (electrical condenser group) output respectively, pulsed current is by 10 MWF15-36 electrical condenser discharge generation, and the waveform of pulsed current and basic parameter are measured by TDS3012 type oscilloscope.
Fig. 2 handles the used pulse current waveform figure of sample for present embodiment, and wherein the discharge cycle of pulsed current is about t
p=110 μ s, peak inrush current density is about j
m=1.05 * 10
4A/mm
2, the time length of individual pulse is about 800 μ s.As shown in Figure 3, the unit elongation that pulsed current is handled the back sample with compare obvious raising before pulsed current is handled, bring up to approximately 57% by original about 37%, and yield strength and ultimate tensile strength do not reduce.Pulsed current is handled the average grain size of back sample and is grown up to 2.5 μ m by the about 2.1 μ m before handling, and considerable change does not take place texture.
Embodiment 2
As different from Example 1: peak inrush current density is about j
m=0.98 * 10
4A/mm
2Before and after its pulsed current is handled the variation of stress strain curve as shown in Figure 4, the unit elongation that pulsed current is handled the back sample has been brought up to about 46% by about 37% before handling, and yield strength and ultimate tensile strength all reduce.Average grain size is grown up to 2.2 μ m a little by the about 2.1 μ m before handling, and considerable change does not take place texture.
Embodiment 3
As different from Example 1: peak inrush current density is about j
m=1.08 * 10
4A/mm
2Before and after its pulsed current is handled the variation of stress strain curve as shown in Figure 5, the unit elongation that pulsed current is handled the back sample has been brought up to about 45% by about 37% before handling, and yield strength and ultimate tensile strength reduce a little.Average grain size is grown up to 2.6 μ m by the about 2.1 μ m before handling, and considerable change does not take place texture.
Embodiment 4
As different from Example 1: material therefor is the AZ31 magnesium alloy of industry extruding attitude, and the sample significant part is of a size of 18mm * 4mm * 2mm.The discharge cycle of pulsed current is about t
p=220 μ s, peak inrush current density is about j
m=0.72 * 10
4A/mm
2, the time length of individual pulse is about 1100 μ s.Before and after its pulsed current is handled the variation of stress strain curve as shown in Figure 6, the unit elongation that pulsed current is handled the back sample has been brought up to about 21% by about 15% before handling, and yield strength and ultimate tensile strength all do not have reduction.Considerable change does not take place in average grain size and texture.
Claims (2)
1, a kind of method that improves magnesium alloy mechanical property is characterized in that: treatment process is that pulsed current is handled pulse current discharging cycle 1 μ s～1000 μ s, peak inrush current density 10
3～10
5A/mm
2, the time length 1 μ s～10000 μ s of individual pulse, the time that pulsed current is handled is the time length of individual pulse.
2, according to the method for the described raising magnesium alloy mechanical property of claim 1, it is characterized in that: the discharge cycle of pulsed current is 50 μ s～500 μ s, and peak inrush current density is 3 * 10
3～4 * 10
4A/mm
2, the time length 200 μ s～2500 μ s of individual pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710010339XA CN100532621C (en) | 2007-02-09 | 2007-02-09 | Method for increasing magnesium alloy mechanical property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710010339XA CN100532621C (en) | 2007-02-09 | 2007-02-09 | Method for increasing magnesium alloy mechanical property |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101240369A CN101240369A (en) | 2008-08-13 |
| CN100532621C true CN100532621C (en) | 2009-08-26 |
Family
ID=39932193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200710010339XA Expired - Fee Related CN100532621C (en) | 2007-02-09 | 2007-02-09 | Method for increasing magnesium alloy mechanical property |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100532621C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489530B (en) * | 2011-12-01 | 2013-12-11 | 上海交通大学 | Preparation method and device for three-dimensional (3D) gradient plates produced through multi-layer rolling and multi-point electric pulse treatment |
| CN102828016B (en) * | 2012-09-21 | 2013-08-14 | 安徽工业大学 | Method for improving edge crack of boron-containing steel casting blank by adopting low-voltage pulse current |
| CN103103464A (en) * | 2013-01-17 | 2013-05-15 | 中国石油大学(华东) | Preparation method of magnesium alloy with high mechanical performance and tribological performance |
| CN110512159B (en) * | 2019-10-08 | 2023-08-18 | 吉林大学 | Pulse current treatment device for eliminating work hardening in magnesium alloy and control method thereof |
| CN113416869B (en) * | 2021-07-05 | 2022-03-11 | 四川大学 | Heterogeneous cobalt-chromium alloy based on laser additive and electric pulse treatment and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004176149A (en) * | 2002-11-28 | 2004-06-24 | Toyota Motor Corp | Method of locally reforming member for working, and its use |
| CN1891363A (en) * | 2005-07-06 | 2007-01-10 | 清华大学深圳研究生院 | Electroplastic rolling method and apparatus for deformable magnesium alloy sheet, band and wire rod |
-
2007
- 2007-02-09 CN CNB200710010339XA patent/CN100532621C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004176149A (en) * | 2002-11-28 | 2004-06-24 | Toyota Motor Corp | Method of locally reforming member for working, and its use |
| CN1891363A (en) * | 2005-07-06 | 2007-01-10 | 清华大学深圳研究生院 | Electroplastic rolling method and apparatus for deformable magnesium alloy sheet, band and wire rod |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101240369A (en) | 2008-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100532621C (en) | Method for increasing magnesium alloy mechanical property | |
| CN101429611B (en) | Gd-doped magnesium lithium alloy | |
| EP1872869A3 (en) | Sort scheme generation based on bin capacity | |
| CN1090244C (en) | Corrosion resistant aluminium alloy containing titanium | |
| EP2337036A3 (en) | Conductive paste for solar cell electrode and solar cell using the same | |
| CN107557706B (en) | A kind of processing method improving magnesium alloy strength | |
| CN109576543A (en) | A method of improving magnesium alloy long-time service life using baking | |
| CN101348890B (en) | Heat treatment process improving high strength wrought magnesium alloy damping performance | |
| CN101962743A (en) | Preparation method of TiNi block nanocrystalline material with fine crystallite dimension | |
| CN109940044B (en) | Electric pulse cold rolling method for magnesium alloy plate | |
| Jinfeng et al. | Electrochemical performance of AZ31 magnesium alloy under different processing conditions | |
| Du et al. | Effect of the electropulsing on mechanical properties and microstructure of an ECAPed AZ31 Mg alloy | |
| CN1814851A (en) | High-strength pulse-current pretreatment method for improving mechanical property of non-crystal alloy | |
| CN102051563B (en) | Aging process of 7075 aluminum alloy | |
| CN102877014A (en) | Thermal treatment method suitable for magnetism alloy with age-hardening property | |
| CN103302130A (en) | High-performance complex-section magnesium alloy profile | |
| CN108359834A (en) | A kind of preparation method of electrospark electrode nanostructure copper alloy | |
| CN1233866C (en) | Preparation method of submicrocrystal ultra high strength aluminium alloy | |
| Lin et al. | Influence of grain refinement and texture evolution on the yield strength of mg alloy processed by cyclic extrusion and compression | |
| CN103589978A (en) | Method for determining deformation heat treatment conditions for improving 2219 aluminium alloy performance | |
| CN105002549A (en) | Cylinder-shaped part microarc oxidation fixture and using method thereof | |
| RU2720289C1 (en) | Electrophysical method of increasing strength and mechanical resistance of sheet workpieces from aluminum-magnesium alloys | |
| CN112251643B (en) | High-thermal-stability equiaxed nanocrystalline Ti6Al4V-Mn alloy and preparation method thereof | |
| CN112342434B (en) | High-thermal-stability equiaxial nanocrystalline Ti-Mn alloy and preparation method thereof | |
| CN203613259U (en) | Isoelectric acicular cathode glow discharge device for surface modifying of titanium alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090826 Termination date: 20100209 |