CN108796329A - A kind of high thermal stability Mg-Gd-Y-Zr nanometers of magnesium alloy preparation methods - Google Patents
A kind of high thermal stability Mg-Gd-Y-Zr nanometers of magnesium alloy preparation methods Download PDFInfo
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- CN108796329A CN108796329A CN201810740446.6A CN201810740446A CN108796329A CN 108796329 A CN108796329 A CN 108796329A CN 201810740446 A CN201810740446 A CN 201810740446A CN 108796329 A CN108796329 A CN 108796329A
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- magnesium alloy
- deformation
- swaging
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- thermal stability
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/06—Alloys based on magnesium with a rare earth metal as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
Abstract
The present invention relates to a kind of high thermal stability Mg-Gd-Y-Zr nanometers of magnesium alloy preparation methods.The quality of magnesium alloy percent composition is：Mg-7 ~ 9Gd-2.5 ~ 3.5Y-0.2 ~ 0.45Zr, alloy bar material is subjected to deformation preparation nanometer magnesium alloy of swaging, it is 0 ~ 250 DEG C to control temperature of swaging, it is 5 ~ 20% to control pass deformation, total deformation is 20 ~ 60%, and control charging rate is 2 ~ 6mm/min, changes feedstock direction after every time deformation, it is 0.5 ~ 1.5m that rotary swaging process, which uses oil lubrication, lubricant flowing velocity,3/ h, anneal gained nanometer magnesium alloy at 110 ~ 175 DEG C after swaging 10 ~ 20h, so that in nanocrystalline crystal boundary segregation occurs for Gd, Y element, a concentration of transgranular 1.2 ~ 2.5 times of gained nanometer magnesium alloy grain boundaries Gd, Y element, the crystal grain of this nanometer of magnesium alloy are grown up temperature >=0.62Tm。
Description
Technical field
The present invention relates to bulk nanostructured material preparation fields, more particularly to high thermal stability nanometer magnesium alloy preparation method.
Background technology
Magnesium alloy has many advantages, such as low-density, high specific strength, high specific stiffness, high-damping, as light structures material of new generation
Material, excellent loss of weight characteristic are of great significance to fields such as aerospace, communications and transportation.Nanometer magnesium alloy has superelevation strong
Degree, can meet the needs of high-grade, precision and advanced field is to high-performance magnesium-alloy.However compared with coarse grain material, nano structural material thermostabilization
Property is generally poor or even some just occur crystal grain in room temperature and grow up so that nano material cannot keep good at a higher temperature
Good machinery and physicochemical property.The nanometer magnesium alloy with high thermal stability is prepared to the extensive use of nanometer magnesium alloy with weight
Want meaning.
Invention content
The invention reside in provide a kind of high thermal stability Mg-Gd-Y-Zr nanometers of magnesium alloy preparation methods.The magnesium alloy matter
Measuring percent composition is：Alloy bar material is carried out deformation preparation nanometer Mg of swaging by Mg-7 ~ 9Gd-2.5 ~ 3.5Y-0.2 ~ 0.45Zr
Alloy, it is 0 ~ 250 DEG C to control temperature of swaging, and control pass deformation is 5 ~ 20%, and total deformation is 20 ~ 60%, controls charging speed
Degree is 2 ~ 6mm/min, changes feedstock direction after every time deformation, it is 0.5 that rotary swaging process, which uses oil lubrication, lubricant flowing velocity,
~1.5m3/ h, anneal gained nanometer magnesium alloy at 110 ~ 175 DEG C after swaging 10 ~ 20h so that Gd, Y element are in nanocrystalline crystal boundary
Segregation, a concentration of transgranular 1.2 ~ 2.5 times of gained nanometer magnesium alloy grain boundaries Gd, Y element, the crystal grain of this nanometer of magnesium alloy occurs
Grow up temperature >=0.62Tm。
The deformation of swaging, it is 0 ~ 200 DEG C to control temperature of swaging.
The deformation of swaging, control pass deformation are 10 ~ 15%.
The deformation of swaging, control total deformation are 30 ~ 50%.
The deformation of swaging, control lubricant flowing velocity are 1 ~ 1.5m3/h。
The annealing, the gained nanometer magnesium alloy that will swage are annealed 10 ~ 20h at 130 ~ 150 DEG C.
The deformation of swaging, control charging rate are 2 ~ 4mm/min.
Advantages of the present invention has：
1. deformation of swaging can generate high strain rate, high strain rate can induce a large amount of dislocations and start and improve alloy maximum
Dislocation density, dislocation can be spread in the accumulation of nanocrystalline crystal boundary for rare earth element provides channel.Selection mode of texturing of swaging is real
The key factor of existing rare earth element segregation.
2. the temperature of material determines the diffusion rate of rare earth element in the magnesium alloy in deformation process, dilute when the temperature is excessively high
Earth elements diffusion is too fast, easily leads to rare earth element enrichment, forms blocky Nd-rich phase, and the formation of massive phase can seriously reduce magnesium and close
The mechanical property of gold.Lubricant and lubricant flow rate can all influence temperature in deformation process, select suitable lubricant,
Control rate of lubricant flow is also to realize an important factor for rare earth element enrichment is without generating massive phase to control material temperature.
3. a large number of experiments exploration shows：It is 0 ~ 250 DEG C to control temperature of swaging, and control pass deformation is 5 ~ 20%, total deformation
Amount is 20 ~ 60%, and control charging rate is 2 ~ 6mm/min, and rotary swaging process uses oil lubrication, lubricant flowing velocity for 0.5 ~
1.5m3The processing parameters of/h just can guarantee and form dislocation chain inside gained nanometer Mg alloy grain and realize rare earth member
Element enrichment.Anneal gained nanometer magnesium alloy at 120 ~ 175 DEG C after swaging 10 ~ 20h, and the rare earth element of enrichment can be made to pass through dislocation
Chain passage diffuses to grain boundaries, forms segregation, and rare earth element obtains high thermal stability nanometer magnesium alloy in the segregation of crystal boundary
It is crucial.
Specific implementation mode
Embodiment 1
The quality of magnesium alloy percent composition is：Mg-7 ~ 9Gd-2.5 ~ 3.5Y-0.2 ~ 0.45Zr, by alloy bar material at 25 DEG C
Deformation of swaging is carried out, control pass deformation is respectively 10%, 15%, 15%, total deformation 35%, and control charging rate is
2mm/min changes feedstock direction after every time deformation, it is 1m that rotary swaging process, which uses oil lubrication, lubricant flowing velocity,3/ h, rotation
Anneal gained nanometer magnesium alloy at 130 DEG C after forging 20h.
A concentration of transgranular 2 times of gained nanometer magnesium alloy grain boundaries Gd, Y element, crystal grain temperature of growing up is 0.62Tm。
Embodiment 2
The quality of magnesium alloy percent composition is：Mg-7 ~ 9Gd-2.5 ~ 3.5Y-0.2 ~ 0.45Zr, by alloy bar material at 150 DEG C
Deformation of swaging is carried out, control pass deformation is respectively 10%, 15%, 10%, 10%, and total deformation 38% controls charging rate
For 4mm/min, change feedstock direction after every time deformation, it is 1.5m that rotary swaging process, which uses oil lubrication, lubricant flowing velocity,3/
H, anneal gained nanometer magnesium alloy at 150 DEG C after swaging 15h.
A concentration of transgranular 2.3 times of gained nanometer magnesium alloy grain boundaries Gd, Y element, crystal grain temperature of growing up is 0.62Tm。
Embodiment 3
The quality of magnesium alloy percent composition is：Mg-7 ~ 9Gd-2.5 ~ 3.5Y-0.2 ~ 0.45Zr, by alloy bar material at 200 DEG C
Deformation of swaging is carried out, control pass deformation is respectively 15%, 15%, 10%, 10%, and total deformation 41% controls charging rate
For 3mm/min, change feedstock direction after every time deformation, it is 1.5m that rotary swaging process, which uses oil lubrication, lubricant flowing velocity,3/
H, anneal gained nanometer magnesium alloy at 140 DEG C after swaging 12h.
A concentration of transgranular 2.5 times of gained nanometer magnesium alloy grain boundaries Gd, Y element, crystal grain temperature of growing up is 0.64Tm。
Claims (7)
1. a kind of high thermal stability Mg-Gd-Y-Zr nanometers of magnesium alloy preparation methods, quality of magnesium alloy percent composition are：Mg-7~
9Gd-2.5 ~ 3.5Y-0.2 ~ 0.45Zr, it is characterised in that including following procedure：First alloy bar material swage to deform to prepare and be received
Rice magnesium alloy, control swage temperature be 0 ~ 250 DEG C, control pass deformation be 5 ~ 20%, total deformation be 20 ~ 60%, control into
Material speed is 2 ~ 6mm/min, changes feedstock direction after every time deformation, and rotary swaging process uses oil lubrication, lubricant flowing velocity
For 0.5 ~ 1.5m3/ h, anneal gained nanometer magnesium alloy at 110 ~ 175 DEG C after swaging 10 ~ 20h.
2. high thermal stability Mg-Gd-Y-Zr nanometers of magnesium alloy preparation methods according to claim 1, it is characterised in that：It is described
It swages deformation, control temperature of swaging is 0 ~ 200 DEG C.
3. high thermal stability Mg-Gd-Y-Zr nanometers of magnesium alloy preparation methods according to claim 1, it is characterised in that：It is described
It swages deformation, control pass deformation is 10 ~ 15%.
4. high thermal stability Mg-Gd-Y-Zr nanometers of magnesium alloy preparation methods according to claim 1, it is characterised in that：It is described
It swages deformation, control total deformation of swaging is 30 ~ 50%.
5. high thermal stability Mg-Gd-Y-Zr nanometers of magnesium alloy preparation methods according to claim 1, it is characterised in that：It is described
It swages deformation, control charging rate is 2 ~ 4mm/min.
6. high thermal stability Mg-Gd-Y-Zr nanometers of magnesium alloy preparation methods according to claim 1, it is characterised in that：It is described
It swages deformation, control lubricant flowing velocity is 1 ~ 1.5m3/h。
7. high thermal stability Mg-Gd-Y-Zr nanometers of magnesium alloy preparation methods according to claim 1, it is characterised in that：It is described
Annealing, the gained nanometer magnesium alloy that will swage are annealed 10 ~ 20h at 130 ~ 150 DEG C.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004353067A (en) * | 2003-05-30 | 2004-12-16 | Sumitomo Denko Steel Wire Kk | Magnesium-based alloy formed body manufacturing method |
| CN101905251A (en) * | 2010-07-07 | 2010-12-08 | 中南大学 | Extrusion deforming process of high-strength large-diameter magnesium alloy rod |
| CN101914737A (en) * | 2010-07-07 | 2010-12-15 | 中南大学 | Heat treatment process of large-size high-tensile magnesium alloy extrusion |
| CN102828134A (en) * | 2012-09-20 | 2012-12-19 | 中南大学 | Three-level aging heat treatment process for nanometer magnesium alloy |
| CN106756680A (en) * | 2016-11-23 | 2017-05-31 | 西北有色金属研究院 | A kind of processing method of high-strength magnesium alloy small-sized bar |
-
2018
- 2018-07-07 CN CN201810740446.6A patent/CN108796329A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004353067A (en) * | 2003-05-30 | 2004-12-16 | Sumitomo Denko Steel Wire Kk | Magnesium-based alloy formed body manufacturing method |
| CN101905251A (en) * | 2010-07-07 | 2010-12-08 | 中南大学 | Extrusion deforming process of high-strength large-diameter magnesium alloy rod |
| CN101914737A (en) * | 2010-07-07 | 2010-12-15 | 中南大学 | Heat treatment process of large-size high-tensile magnesium alloy extrusion |
| CN102828134A (en) * | 2012-09-20 | 2012-12-19 | 中南大学 | Three-level aging heat treatment process for nanometer magnesium alloy |
| CN106756680A (en) * | 2016-11-23 | 2017-05-31 | 西北有色金属研究院 | A kind of processing method of high-strength magnesium alloy small-sized bar |
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