CN109182855B - A kind of deformable low bulk magnesium alloy - Google Patents
A kind of deformable low bulk magnesium alloy Download PDFInfo
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- CN109182855B CN109182855B CN201810959138.2A CN201810959138A CN109182855B CN 109182855 B CN109182855 B CN 109182855B CN 201810959138 A CN201810959138 A CN 201810959138A CN 109182855 B CN109182855 B CN 109182855B
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- alloy
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- magnesium
- low bulk
- magnesium alloy
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0408—Light metal alloys
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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 invention discloses a kind of deformable low bulk Mg-Zr alloys, which not only has low linear expansion coefficient, while having good plastic deformation ability.Pass through powder metallurgy route and combine high-temperature annealing process, can synthetic tissue densification, the uniform low bulk of ingredient, deformable processing Mg-Zr alloy.The content of Zr is up to 35~45wt% in the magnesium alloy substrate, and in 0~300 DEG C of temperature range when lifting/lowering temperature, the linear expansion coefficient of the alloy is 12.6~14.8 × 10‑6/℃.Meanwhile the room-temperature mechanical property of the alloy material is good, tensile strength is 224.1~248.5MPa, and elongation is 13.0~15.6%.
Description
Technical field
The invention belongs to technical field of function materials, and in particular to a kind of low bulk, deformable Mg-Zr alloy.
Background technique
In deep-space detection field, material must bear the alternation temperature difference of -200~200 DEG C of ranges and lasting space radiation is examined
It tests.Magnesium alloy materials are current most light structural metallic engineering material (specific gravity 1.74g/cm3Left and right), however high expansion system
Number (2.7 × 10-5/ DEG C) stability that causes magnesium alloy space components poor, it is limited in defence and military and space flight and aviation
Popularization and application in field.Si particle expansion coefficient is low, and specific gravity is small, thus common usually as the low swollen composite material of tradition
Reinforced phase, as Si constituent content is more than 50wt% in some low bulk aluminium alloys, and mostly use powder metallurgy formation.High Si
On the one hand content guarantees that the linear expansion coefficient of material significantly reduces, on the other hand also result in extremely serious negative effect: 1)
Silicon is rigid phase, is almost not involved in material internal deformation process, can generate stress collection sharply at the interface Mg/Si in deformation process
In；2) Si and aluminium, magnesium or generation eutectic reaction, or brittleness Mg is formed at the interface Mg, Si2Si phase；Thus, Si element largely adds
Enter to inevitably lead to the strong brittleness of magnesium alloy, cause such alloy plasticity extremely low, almost without the possibility of Plastic Forming
Property.
Metal zirconium and magnesium are all Patterns for Close-Packed Hexagonal Crystal structure, and the two has good thermodynamic compatibility.Metal zirconium fusing point
Height, linear expansion coefficient are 4.4~6.72 × 10-6/℃.The yield strength of pure magnesium be 90~105MPa, tensile strength be 160~
195MPa, elongation is between 3~15%；Zirconium good mechanical performance, elongation is up to 18%, and yield strength is on the left side 138MPa
The right side, tensile strength is close to 300MPa.In magnesium alloy chemical practice, Zr is added to magnesium alloy usually as a kind of grain refiner and melts
In body, to improve the plasticity of magnesium matrix, but its content is generally difficult to be primarily due to magnesium and zirconium fusing point and specific gravity more than 0.8wt%
Caused by differing greatly.Add Zr in the form of potassium fluorozirconate, content is also no more than 30wt% in magnesium, and its Zr element divides in magnesium
Cloth uniformity is poor, is typically only capable to be used for the melting and alloying of magnesium alloy as Mg-Zr intermediate alloy.
It is well known that a kind of alloying element is largely added to when being alloyed in element, it is significantly crisp to typically result in metal
Property.It is primarily due to the generation of a large amount of eutectic phases or brittle intermetallic compound phase.The present invention selects Mg, Zr to carry out low swollen conjunction
Aurification to substitute traditional Mg-Si system low-expansion alloy, and synthesizes the Mg- of 35~45wt.% containing zirconium using powder metallurgy route
Zr alloy, the alloy have following essential characteristics: 1) magnesium matrix is obtained with reinforced phase interface fine structure with interface mechanical characteristic
To greatly improving, the formation of no eutectic phase instead Zr concentration gradient layer occur；2) the Mg phase in plastic history
Deformation is both participated in Zr phase, and there is the harmony and consistency of deformation.
Summary of the invention
The present invention proposes a kind of low bulk Mg-Zr alloys for existing magnesium alloy materials linear expansion coefficient is excessively high, with tradition
Mg-Si system low-expansion alloy is compared, which has many advantages, such as that ductility is good, can carry out plastic processing forming.Tool of the invention
Body technique scheme is as follows.
A kind of deformable low bulk Mg-Zr alloy, the wherein chemical component of alloy are as follows: 35~45wt% of zirconium, remaining is Mg.
The processing method of above-mentioned deformable low bulk Mg-Zr alloy, comprising the following steps::
1) under protection of argon gas, the zirconium powder of 35~45wt.% and a certain proportion of magnesium powder are sufficiently mixed；
2) after the two is sufficiently mixed, make its thermal sintering under impressed pressure, external pressure is controlled in 85~100MPa
In range, sintering temperature is controlled within the scope of 600~620 DEG C, keeps the temperature 30~40min；
3) Mg-Zr alloy is heat-treated under protection of argon gas, heat treatment temperature is 500~520 DEG C, and soaking time is
2~4h.
Advantageous effects of the invention are as follows: 1) Plastic Forming performance obtains while the magnesium alloy wire coefficient of expansion is greatly reduced
To significantly improving, make it possible low swollen magnesium alloy plastic processing；2) intensity with corrosion resistance of alloy also significantly improve therewith.
Specific embodiment
The invention will be further described with reference to embodiments.
Embodiment 1
A kind of binary Mg-Zr low bulk magnesium alloy materials, wherein Zr constituent content is 35.0wt% or so, remaining is magnesium；
Under argon atmosphere, the zirconium powder of 35wt.% and a certain proportion of magnesium powder are sufficiently mixed.After the two is sufficiently mixed, make
Its thermal sintering under impressed pressure, in 85MPa or so, sintering temperature controls the heat preservation at 600 DEG C or so for external pressure control
30min or so；Subsequent heat treatment carries out under protection of argon gas, and heat treatment temperature is 500 DEG C or so, soaking time 2h.0~
Test in 300 DEG C of temperature ranges, the linear expansion coefficient of the material are 14.8 × 10-6/℃(GB/T 4339-2008).It surveys at room temperature
It tries mechanical property (ASTM/B557M), tensile strength 224.1MPa, elongation 13.0%.
Embodiment 2
A kind of binary Mg-Zr low bulk magnesium alloy materials, wherein Zr constituent content is 45.0wt.% or so, remaining is magnesium；
Under argon atmosphere, the zirconium powder of 45wt.% and a certain proportion of magnesium powder are sufficiently mixed.After the two is sufficiently mixed, make
Its thermal sintering under impressed pressure, in 100MPa or so, sintering temperature controls the heat preservation at 620 DEG C or so for external pressure control
40min or so；Subsequent heat treatment carries out under protection of argon gas, and heat treatment temperature is 520 DEG C or so, soaking time 4h.0~
Test in 300 DEG C of temperature ranges, the linear expansion coefficient of the material are 12.6 × 10-6/℃(GB/T 4339-2008).It surveys at room temperature
It tries mechanical property (ASTM/B557M), tensile strength 248.5MPa, elongation 15.6%.
Technical solution of the present invention is described in detail in above-described embodiment.It is apparent that the present invention is not limited being retouched
The embodiment stated.Based on the embodiments of the present invention, those skilled in the art can also make a variety of variations accordingly, but appoint
What is equal with the present invention or similar variation shall fall within the protection scope of the present invention.
Claims (3)
1. a kind of processing method of deformable low bulk Mg-Zr alloy, Zr constituent content is 35~45wt% in the alloy,
Remaining is magnesium；It the described method comprises the following steps:
1) zirconium powder of 35~45wt.% is mixed with magnesium powder, obtains mixture；
2) by the thermal sintering under stress of mixture obtained by step 1), Mg-Zr alloy is obtained；
External pressure controls within the scope of 85~100MPa；
3) Mg-Zr alloy obtained by step 2) is heat-treated；The heat treatment carries out under protection of argon gas, temperature be 500~
520 DEG C, soaking time is 2~4h.
2. the method according to claim 1, which is characterized in that pressure described in step 2) controls within the scope of 85~100MPa,
The temperature of the sintering controls within the scope of 600~620 DEG C, keeps the temperature 30~40min.
3. the method according to claim 1, which is characterized in that step 1) carries out under protection of argon gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810959138.2A CN109182855B (en) | 2018-08-22 | 2018-08-22 | A kind of deformable low bulk magnesium alloy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810959138.2A CN109182855B (en) | 2018-08-22 | 2018-08-22 | A kind of deformable low bulk magnesium alloy |
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| Publication Number | Publication Date |
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| CN109182855A CN109182855A (en) | 2019-01-11 |
| CN109182855B true CN109182855B (en) | 2019-11-08 |
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| CN201810959138.2A Active CN109182855B (en) | 2018-08-22 | 2018-08-22 | A kind of deformable low bulk magnesium alloy |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2813023A (en) * | 1955-08-11 | 1957-11-12 | Dow Chemical Co | Method of making a magnesium-base alloy containing aluminum and zinc |
| SU540934A1 (en) * | 1975-10-13 | 1976-12-30 | Предприятие П/Я Г-4361 | Ligature |
| US20050161121A1 (en) * | 2002-01-18 | 2005-07-28 | Cast Centre Pty Ltd | Magnesium-zirconium alloying |
| CN102517458B (en) * | 2011-12-30 | 2013-05-01 | 中原工学院 | Method for removing Fe impurity in magnesium or magnesium alloys by adopting Mg-Zr intermediate alloy |
| CN103540774A (en) * | 2012-07-17 | 2014-01-29 | 湖南稀土金属材料研究院 | Magnesium-zirconium intermediate alloy and production method thereof |
| CN104894419B (en) * | 2015-02-26 | 2017-01-04 | 南昌大学 | A kind of coated magnesium oxide Graphene strengthens the method for magnesium base composite material |
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2018
- 2018-08-22 CN CN201810959138.2A patent/CN109182855B/en active Active
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