CN108707848A - A kind of VW93M nanometers of isomery magnesium alloy aging thermal treating process - Google Patents
A kind of VW93M nanometers of isomery magnesium alloy aging thermal treating process Download PDFInfo
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- CN108707848A CN108707848A CN201810740438.1A CN201810740438A CN108707848A CN 108707848 A CN108707848 A CN 108707848A CN 201810740438 A CN201810740438 A CN 201810740438A CN 108707848 A CN108707848 A CN 108707848A
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- magnesium alloy
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- isomery
- vw93m
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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
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The present invention relates to a kind of VW93M nanometers of isomery magnesium alloy aging thermal treating process.The quality of magnesium alloy percent composition is：Mg-8.0~9.6Gd-1.8~3.2Y-0.3~0.7Zr-0.02~0.5Ag-0.02~0.3Er,Alloy bar material is subjected to deformation of swaging,It is 100 ~ 370 DEG C to control temperature of swaging,Pass deformation is 10 ~ 20%,Total deformation is 5 ~ 60%,Charging rate is 3 ~ 6mm/min,Nanometer isomery magnesium alloy is made,Gained nanometer isomery magnesium alloy is subjected to level-one ageing treatment at 120 ~ 175 DEG C,Processing time is 5 ~ 20h,Alloy after level-one timeliness is subjected to secondary time effect processing at 180 ~ 220 DEG C,Processing time is 10 ~ 60h,Alloy improves 100 ~ 180MPa compared with nonageing state tensile strength after ageing treatment,Yield strength improves 100 ~ 180MPa.
Description
Technical field
The present invention relates to nano metal material fields, more particularly to a kind of nanometer of isomery magnesium alloy aging thermal treating process.
Background technology
Nano structural material has excellent physical property, chemical property and mechanical property, before having a wide range of applications
Scape.However nano structural material plasticity is relatively low, is difficult to prepare, this seriously inhibits its research and application processes.Compared to nanometer
Structural material, nanometer isomery material have many advantages, such as plasticity higher, are easier to prepare, and there is high application study to be worth.
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.However existing magnesium alloy mechanical property
It can be relatively low, it is difficult to meet the needs of fields such as aerospace are for high performance material.It prepares nanometer isomery magnesium alloy and studies it
Aging thermal treating process is of great significance to preparing high-strength or even super high-strength magnesium alloy.
Invention content
Present invention aims at provide a kind of VW93M nanometers of isomery magnesium alloy aging thermal treating process, the magnesium alloy matter
Measuring percent composition is：Mg-8.0 ~ 9.6Gd-1.8 ~ 3.2Y-0.3 ~ 0.7Zr-0.02 ~ 0.5Ag-0.02 ~ 0.3Er, including it is following
Specific steps：
A. alloy bar material is subjected to deformation of swaging, control swage temperature be 100 ~ 370 DEG C, pass deformation be 10 ~ 20%, always change
Shape amount is that 5 ~ 60%, charging rate is 3 ~ 6mm/min, and nanometer isomery magnesium alloy is made；
B. gained nanometer isomery magnesium alloy is subjected to level-one ageing treatment at 120 ~ 175 DEG C, processing time is 5 ~ 20h；
C., alloy after level-one timeliness is carried out to secondary time effect processing at 180 ~ 220 DEG C, processing time is 10 ~ 60h.
Gained nanometer isomery magnesium alloy is carried out level-one ageing treatment by the level-one ageing treatment at 140 ~ 160 DEG C, place
The reason time is 10 ~ 15h.
The secondary time effect processing, carries out secondary time effect processing by the alloy after level-one timeliness at 180 ~ 200 DEG C, handles
Time is 20 ~ 60h.
VW93M nanometers of isomery magnesium alloy aging strengthening model difficult point of the present invention is that nanometer isomery magnesium alloy exists
Several respects it is uneven：
1. crystallite dimension is uneven；
2. internal stress is unevenly distributed, has occurred and that the nanocrystalline region internal stress of recrystallization is smaller, not yet recrystallize
Ultra-fine crystalline region internal stress is very big；
3. micro-area composition is uneven, the transgranular elementide of the crystal boundary atom segregation and formation that occur in rotary swaging process causes
There are uneven components in the microcell in tens nanometer ranges for deformed nanometer isomery magnesium alloy.
The existing tissue of nanometer isomery magnesium alloy and uneven components determine that it easily occurs during aging strengthening model
Following problem：
1. in nanometer isomery magnesium alloy, the different region thermal stability of crystallite dimension is different, and crystal grain is smaller, thermal stability is got over
Difference.Must assure that crystal grain does not occur grows up in ageing process, thus nanometer crystalline region and ultra-fine crystalline region can bear highest when
It is different to imitate temperature；
2. compared to rare earth element stripping section, rare earth element enrichment region is easier that the precipitation of rare earth element occurs, and leads to the areas Liang Zhong
The timeliness decomposition behavior in domain is asynchronous；
3. rare-earth enrichment area has higher second phase forming core and power of growing up, coarse blocky stable phase is easily formed, it is blocky
Low-alloyed mechanical property can acutely drop in stable phase；
4. internal stress has the function of inducing the second phase forming core and grow up that, compared to low stress area, the region of high stress has higher
Second phase forming core and power of growing up, thus be easy to form coarse blocky stable phase, the formation of blocky stable phase in the region of high stress
Alloy mechanical property can acutely be reduced.
The innovation of the present invention is：
1. the present invention provides a kind of two-stage time effect heat treatment process.In first order ag(e)ing process, deformation of swaging generates big
Part internal stress is eliminated, the excessively high generation for easily leading to coarse blocky stable phase of internal stress, thus first order timeliness is not
It can or lack.In order to ensure that crystal grain does not occur in ag(e)ing process grows up, thus first order aging temp should be low as possible, but too low
Temperature be difficult to realize eliminate internal stress, combining with theoretical analysis of the present invention and a large number of experiments are finally verified 120 ~ 175 DEG C and are received for this
The best first order aging temperature of rice isomery magnesium alloy, and it is suitable aging time, Ji Nengbao to explore 5 ~ 20h
The most of internal stress of card is eliminated, and crystal grain does not occur and grows up.
2. in the ageing process of the second level, Solid solution decomposition, the second phase forming core mainly occurring and grows up.Aging temp mistake
Height, aging time are long, all easily lead to blocky Nd-rich phase and generate, but aging temp is too low, aging time is too short, cannot reach
To ageing strengthening effect.Combining with theoretical analysis of the present invention and a large number of experiments, it is final to determine in 180 ~ 220 DEG C of 10 ~ 60h of timeliness, energy
Ensure that nanometer crystalline region and ultra-fine crystalline region all reach peak timeliness state, while not generating coarse blocky stable phase again.
Specific implementation mode
Embodiment 1
The quality of magnesium alloy percent composition is：Mg-8.0Gd-3.0Y-0.4Zr-0.05Ag-0.03Er exists alloy bar material
250 DEG C carry out deformation of swaging, and control pass deformation is 15%, 10%, 10%, total deformation 31%, and control charging rate is
Nanometer isomery magnesium alloy is made in 4mm/min.Gained nanometer isomery magnesium alloy is subjected to first order ageing treatment, timeliness at 145 DEG C
Then time 15h carries out second level ageing treatment, aging time 40h at 200 DEG C.
Mechanics Performance Testing is carried out to aging state alloy according to GB/T228-2002 and is compared with alloy before timeliness, is tied
Fruit shows that, in contrast to nonageing nanometer isomery magnesium alloy, aging state strength of alloy improves 151MPa, and yield strength improves
135MPa。
Embodiment 2
The quality of magnesium alloy percent composition is：Mg-8.0Gd-3.0Y-0.4Zr-0.05Ag-0.03Er exists alloy bar material
250 DEG C carry out deformation of swaging, and control pass deformation is 15%, 10%, 10%, total deformation 31%, and control charging rate is
Nanometer isomery magnesium alloy is made in 4mm/min.Gained nanometer isomery magnesium alloy is subjected to first order ageing treatment, timeliness at 155 DEG C
Then time 20h carries out second level ageing treatment, aging time 60h at 180 DEG C.According to GB/T228-2002 to aging state
Magnesium alloy carries out Mechanics Performance Testing and is compared with alloy before timeliness, the results showed that, in contrast to nonageing nanometer isomery magnesium
Alloy, aging state strength of alloy improve 175MPa, and yield strength improves 155MPa.
Embodiment 3
The quality of magnesium alloy percent composition is：Mg-8.0Gd-3.0Y-0.4Zr-0.05Ag-0.03Er exists alloy bar material
250 DEG C carry out deformation of swaging, and control pass deformation is 15%, 10%, 10%, total deformation 31%, and control charging rate is
Nanometer isomery magnesium alloy is made in 4mm/min.Gained nanometer isomery magnesium alloy is subjected to first order ageing treatment, timeliness at 160 DEG C
Then time 6h carries out second level ageing treatment, aging time 50h at 180 DEG C.According to GB/T228-2002 to aging state magnesium
Alloy carries out Mechanics Performance Testing and is compared with alloy before timeliness, the results showed that, it is closed in contrast to nonageing nanometer isomery magnesium
Gold, aging state strength of alloy improve 122MPa, and yield strength improves 136MPa.
Claims (3)
1. a kind of VW93M nanometers of isomery magnesium alloy aging thermal treating process, quality of magnesium alloy percent composition are：Mg-8.0~
9.6Gd-1.8 ~ 3.2Y-0.3 ~ 0.7Zr-0.02 ~ 0.5Ag-0.02 ~ 0.3Er, it is characterised in that including following procedure：By alloy
Bar carries out deformation of swaging, control swage temperature be 100 ~ 370 DEG C, pass deformation be 10 ~ 20%, total deformation be 5 ~ 60%,
Charging rate is 3 ~ 6mm/min, and nanometer isomery magnesium alloy is made, gained nanometer isomery magnesium alloy is carried out at 120 ~ 175 DEG C
Level-one ageing treatment, processing time are 5 ~ 20h, and the alloy after level-one timeliness is carried out secondary time effect processing at 180 ~ 220 DEG C,
Processing time is 10 ~ 60h.
2. VW93M nanometers of isomery magnesium alloy aging thermal treating process according to claim 1, it is characterised in that：The level-one
Gained nanometer isomery magnesium alloy is carried out level-one ageing treatment by ageing treatment at 140 ~ 160 DEG C, and processing time is 10 ~ 15h.
3. VW93M nanometers of isomery magnesium alloy aging thermal treating process according to claim 1, it is characterised in that：The two level
Alloy after level-one timeliness is carried out secondary time effect processing by ageing treatment at 180 ~ 200 DEG C, and processing time is 20 ~ 60h.
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| CN201810740438.1A CN108707848A (en) | 2018-07-07 | 2018-07-07 | A kind of VW93M nanometers of isomery magnesium alloy aging thermal treating process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111647839A (en) * | 2020-05-21 | 2020-09-11 | 南京理工大学 | Method and system for preparing heterogeneous material by electric arc spraying |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463442A (en) * | 2009-01-15 | 2009-06-24 | 上海交通大学 | Casting magnesium alloy containing Ag and heavy rare earth and preparation thereof |
| CN102828134A (en) * | 2012-09-20 | 2012-12-19 | 中南大学 | Three-level aging heat treatment process for nanometer magnesium alloy |
| CN103820689A (en) * | 2012-11-19 | 2014-05-28 | 北京有色金属研究总院 | High-strength and heat-resistant magnesium alloy containing two rare earths and preparation method thereof |
| 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 |
| CN107245619A (en) * | 2017-03-03 | 2017-10-13 | 中南大学 | A kind of strong high temperature resistant magnesium alloy of superelevation |
-
2018
- 2018-07-07 CN CN201810740438.1A patent/CN108707848A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463442A (en) * | 2009-01-15 | 2009-06-24 | 上海交通大学 | Casting magnesium alloy containing Ag and heavy rare earth and preparation thereof |
| CN102828134A (en) * | 2012-09-20 | 2012-12-19 | 中南大学 | Three-level aging heat treatment process for nanometer magnesium alloy |
| CN103820689A (en) * | 2012-11-19 | 2014-05-28 | 北京有色金属研究总院 | High-strength and heat-resistant magnesium alloy containing two rare earths and preparation method thereof |
| 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 |
| CN107245619A (en) * | 2017-03-03 | 2017-10-13 | 中南大学 | A kind of strong high temperature resistant magnesium alloy of superelevation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111647839A (en) * | 2020-05-21 | 2020-09-11 | 南京理工大学 | Method and system for preparing heterogeneous material by electric arc spraying |
| CN111647839B (en) * | 2020-05-21 | 2022-10-21 | 南京理工大学 | Method and system for preparing heterogeneous material by electric arc spraying |
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Application publication date: 20181026 |