CN102501454A - High-performance magnesium alloy wave-absorbing composite plate and preparation method thereof - Google Patents
High-performance magnesium alloy wave-absorbing composite plate and preparation method thereof Download PDFInfo
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- CN102501454A CN102501454A CN2011103500655A CN201110350065A CN102501454A CN 102501454 A CN102501454 A CN 102501454A CN 2011103500655 A CN2011103500655 A CN 2011103500655A CN 201110350065 A CN201110350065 A CN 201110350065A CN 102501454 A CN102501454 A CN 102501454A
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Abstract
The invention discloses a high-performance magnesium alloy wave-absorbing composite plate and a preparation method thereof, and belongs to the field of light alloy machining. The composite plate comprises three layers, wherein the uppermost layer is a Mg35Zn53Gd12 quasicrystal wave-absorbing layer; the middle layer is a combined layer consisting of eutectic structures of MgZn and Mg; and the lowermost layer is a Mg-15Gd-4Er-0.4Zr magnesium alloy plate. The preparation method comprises the following steps of: applying 50MPa static pressure to a Mg-15Gd-4Er-0.4Zr alloy ingot at normal temperature, heating to the temperature of 510DEG C, and keeping the temperature for 3 hours; cooling to the temperature of 370DEG C, extruding a plate with the thickness of 10mm in an extrusion ratio of 1:20, keeping 310DEG C for 30 minutes, and rolling into a plate with the thickness of 5mm; heating in casting equipment; heating to melt a 35Mg-50Zn-15Gd-based quasicrystal intermediate alloy, and directly casting on the magnesium alloy plate; and standing, detaching baffles, and immersing in water at the temperature of 80DEG C. The wave-absorbing composite plate has light weight, high strength, and a good wave absorbing effect, and the wave-absorbing layer is difficult to strip.
Description
Technical field
The present invention relates to a kind of high-performance magnesium-alloy and inhale ripple composite board and preparation method thereof; The accurate brilliant wave-absorber that is of particularly a kind of utilization; Adopt the compound a kind of high-performance magnesium-alloy of conventional cast technology to inhale ripple composite board and preparation method thereof, belong to the light-alloy manufacture field.
Background technology
Be accompanied by the third technical revolution, the extensive use of electronic equipment when creating material progress, has also brought an environment that is full of electromagnetic radiation.Too much electromagnetic radiation meeting produces many harm, and for example: the service behaviour of electronic equipment can destroyed or reduce to electromagnetic interference; The electromagnetic interference energy possibly cause the on fire of inflammable and explosive substances and blast, causes weaponry malfunctioning, brings enormous economic loss and personnel's injures and deaths.Systems such as reproduction, nerve and hematopoiesis to the mankind produce serious damaging effect.Become the fourth-largest pollution after atmosphere pollution, water pollution, noise pollution.Absorbing material arises at the historic moment under this situation.Absorbing material is meant the incident electromagnetic wave that can absorb and decay, and converts electromagnetic energy to heat energy and with its one type of material that dissipates or electromagnetic wave is disappeared because of interference.Absorbing material has purposes widely at electromagnetic shielding, television broadcasting, microwave dark room and electronic device etc. aspect civilian, aspect military technology, also has very big value.A wherein most important application is exactly a radar absorbing, utilizes the interaction of absorbent and radar wave and reaches the purpose of loss electromagnetic energy, and reflected energy is reduced to greatest extent.Because electromagnetic shielding and the important function of absorbing material in social life and national defense construction, research and development thin thickness, light weight, bandwidth, multifunctional novel absorbing material become the important topic of people's growing interest.
Absorbing material is close to harsh to material performance requirement.See that from development trend following several respects will become the direction of giving priority to of absorbing material: (1) requires material to have high specific strength, high ratio modulus and high tenacity; (2) require material absorbing property widebandization, high efficiency.Using at present is coating type absorbing material (being microwave absorbing coating) more widely; But it is not enough below it exists: 1) for guaranteeing the absorbing property of microwave absorbing coating; Its thickness generally big (＞1mm), will cause that coating is inner to exist big internal stress, coating is easy to cracking, peels off; 2) microwave absorbing coating can the increase system be conducted oneself with dignity, and equipment index is had a negative impact.
Along with the enhancing of environmental protection and awareness of saving energy, investigation of materials person and product designer are more and more paid attention to the lightweight and the problem such as recyclable of product.Characteristics such as as present the lightest engineering metal material, magnesium alloy is with its high specific strength, and is recyclable, the representative that becomes light metal material is a dark horse, the speed sustainable growth with annual 20%.Accurate brilliant definition accurately is the solid-state ordered phase that has long-range quasi periodic translation preface and noncrystal rotational symmetry simultaneously, have 5 times be higher than 6 times 8 times, 10 times and 12 inferior special symmetry.Since finding accurate crystalline substance, people aim at that crystalline substance has carried out deeply, extensive studies, have all obtained very big progress in each side researchs such as accurate brilliant structure and physical properties.The magnetic characteristic that the distinctive high rigidity of quasicrystal material, low-friction coefficient, low thermal coefficient of expansion, low interface energy, the accurate crystalline substance of performance, particularly Mg-Zn-Re such as anti-corrosion, heat-resisting and wear-resisting have is particularly suitable for as novel wave-absorbing material it.
Summary of the invention
The present invention is directed to the defective that exists in the background technology, provide a kind of high-performance magnesium-alloy to inhale ripple composite board and preparation method thereof.Utilizing the thermally-stabilised icosahedral quasicrystal of Mg-Zn-Gd base to be wave-absorber, is matrix with the Mg-15Gd-4Er-0.4Zr magnesium alloy of high-strength light, adopts specific preparation technology; It is light that the brilliant composite wave-absorbing sheet material of magnesium alloy/standard that obtains has material weight, and intensity is high, and it is incrust to inhale the ripple layer; It is wide to inhale the ripple frequency; The characteristics that wave-absorbing effect is good can be used for building fields such as electromagnetic shielding, information and mechanics of communication are maintained secrecy, military stealth technology, possess higher commercial application value.
A kind of high-performance magnesium-alloy is inhaled the ripple composite board, it is characterized in that, inhales the ripple composite board and comprises three layers, and inhaling the ripple layer topmost is Mg
35Zn
53Gd
12Accurate crystal layer, the binder course that it is formed for the eutectic structure of MgZn and Mg down is the Mg-15Gd-4Er-0.4Zr magnesium alloy plate as the intensity layer down.Employed wave-absorber Mg
35Zn
53Gd
12Quasicrystal is that the accurate brilliant intermediate alloy of 35Mg-50Zn-15Gd forms when solidifying by composition.
Above-mentioned high-performance magnesium-alloy is inhaled the preparation method of ripple composite board, it is characterized in that, may further comprise the steps:
1), will cast the Mg-15Gd-4Er-0.4Zr alloy pig of preparation, the axial static pressure of 50MPa on vertical extruder at normal temperatures, and keeping 20 minutes is heated to 510 ℃ and be incubated 3h again in resistance furnace.Through apply axial static pressure to alloy pig, can make material assemble certain residual stress at the crystal boundary place.Can quicken second phase decomposition at crystal boundary place like this, make material accomplish the solid solution process within a short period of time.
2) after, the alloy pig of taking-up step 1) is cooled to 370 ℃; Be placed on horizontal extruder and extrude the sheet material that thickness is 10mm with 1: 20 extrusion ratio; The sheet material that again extruding is obtained is 310 ℃ of insulations after 30 minutes; On double-roll rolling mill, be rolled to 5mm, obtain as complex matrix required magnesium alloy plate;
3), with step 2) magnesium alloy plate of preparation is placed in the smelting-casting equipment, heats, the upper surface temperature that guarantees sheet material is at 330 ℃;
4), be that the brilliant intermediate alloy of benchmark of 35Mg-50Zn-15Gd is heated to 650 ℃ with composition, it is dissolved obtains intermediate alloy liquid, on the magnesium alloy plate of step 3), make it cover the magnesium alloy plate matrix direct pouring of intermediate alloy liquid; After leaving standstill 1 minute, remove the baffle plate of smelting-casting equipment at once, composite board is taken out, invade in 80 ℃ the hot water, just obtain the brilliant composite wave-absorbing sheet material of magnesium alloy/standard.
To the purpose of sheet material heating is in order to make the standard brilliant intermediate alloy of casting on it when solidifying, and is later than near a side of sheet material to expose air one side and solidify, and can cause that like this rare earth element gathers to solidifying a lateral deviation earlier, thereby the tissue of diverse location is solidified in control.The sheet material that obtains like this can make accurate crystal layer be positioned at the suction ripple layer of surface as this material, and the binder course that it is formed for the eutectic structure of MgZn and Mg down is the Mg-15Gd-4Er-0.4Zr magnesium alloy plate as the intensity layer down.
The smelting-casting equipment that uses when the present invention prepares composite board is shown in accompanying drawing 1, and smelting-casting equipment is a box body, and it mainly comprises following two parts: 1) heatable base, 2) dismountable rectangular metal frame founding baffle plate on base.Heatable base is embedded with the resistance wire (see figure 1) by the base of high-strength temperature-resistant material preparation, plays when casting to be the purpose as the magnesium alloy plate heating of complex matrix; The founding baffle plate is a rectangular metal frame by the founding baffle plate of mild steel preparation, and its size is slightly larger than the rolling magnesium alloy plate as complex matrix that obtains, and plays the purpose that the accurate brilliant intermediate alloy flow of restriction goes out when casting.
Description of drawings
Fig. 1. be the smelting-casting equipment sketch map among the preparation method of the present invention;
Fig. 2. be embodiment 1 sheet material and the compound shape appearance figure mutually of accurate crystal layer;
Fig. 3. be embodiment 1 spherical quasi crystal shape appearance figure;
Fig. 4. be the wave-absorbing effect and the common sheet material comparative result of the embodiment of the invention;
Fig. 5. be accurate brilliant EDAX results in the embodiment of the invention.
The specific embodiment
Embodiment 1:
Preparation as follows, the smelting-casting equipment among the preparation method is seen Fig. 1:
1. adopt the conventional cast method to prepare the Mg-15Gd-4Er-0.4Zr alloy pig;
2. with the Mg-15Gd-4Er-0.4Zr alloy pig, on vertical extruder, apply the axial static pressure of 50MPa at normal temperatures, and kept 20 minutes;
3. will handle back Mg-15Gd-4Er-0.4Zr alloy pig, in resistance furnace, be heated to 510 ℃ and be incubated 3h;
4. after the Mg-15Gd-4Er-0.4Zr alloy pig being cooled to 370 ℃, extrude the sheet material that thickness is 10mm with 1: 20 extrusion ratio at horizontal extruder;
5. the sheet material that extruding is obtained is incubated 30 minutes in 310 ℃ in resistance furnace;
6. with the extrusion plate of handling well, on double-roll rolling mill, be rolled to 5mm, obtain as the required magnesium alloy plate of complex matrix;
7. the magnesium alloy plate matrix is placed in the equipment shown in the accompanying drawing 1, with heated base heating, control magnesium alloy plate upper surface to 330 ℃;
8. the accurate brilliant intermediate alloy of 35Mg-50Zn-15Gd is heated to 650 ℃, to its fusing;
9. with the brilliant intermediate alloy of the 35Mg-50Zn-15Gd benchmark in the step 8 of fusing, direct pouring makes it cover the magnesium alloy plate matrix in smelting-casting equipment;
10. after leaving standstill 1 minute, remove the baffle plate of smelting-casting equipment at once, composite board is taken out, invade in 80 ℃ the hot water.
It is three layers that the sheet material that obtains is divided into, and is the suction ripple layer Mg of this material topmost
35Zn
53Gd
12Accurate crystal layer, the binder course that it is formed for the eutectic structure of MgZn and Mg down is the Mg-15Gd-4Er-0.4Zr magnesium alloy plate as the intensity layer down.Through the control setting temperature; Cause Gd element skewness, improved the top layer quasicrystal and got content, can see a large amount of accurate crystalline substances on the composite board surface; The spherical quasi crystal (shown in accompanying drawing 3) that One's name is legion is wherein arranged, the accurate brilliant EDAX results of gained is seen Fig. 5.Improved the wave absorbing efficiency of material greatly, the material of the relatively more visible the present invention's design of the wave-absorbing effect of composite board of the present invention and ordinary magnesium alloy sheet material is inhaled ripple wide frequency range, wave-absorbing effect good (shown in accompanying drawing 4).Because the Gd element to the material surface enrichment, makes MgZn can depend on the growth of magnesium alloy plate matrix with the eutectic structure mutually of Mg mutually, so just make the accurate crystal layer and the matrix bond quite firm (shown in accompanying drawing 2) of inhaling ripple simultaneously, thus incrust.
Claims (3)
1. a high-performance magnesium-alloy is inhaled the ripple composite board, it is characterized in that, inhales the ripple composite board and comprises three layers, and inhaling the ripple layer topmost is Mg
35Zn
53Gd
12Accurate crystal layer, the binder course that it is formed for the eutectic structure of MgZn and Mg down is the Mg-15Gd-4Er-0.4Zr magnesium alloy plate as the intensity layer down.
2. the described suction ripple of claim 1 composite board is characterized in that Mg
35Zn
53Gd
12Accurate crystal layer is that the accurate brilliant intermediate alloy of 35Mg-50Zn-15Gd forms when solidifying by composition.
3. the preparation method of the described a kind of high-performance magnesium-alloy suction ripple composite board of claim 1 is characterized in that, may further comprise the steps:
1), will cast the Mg-15Gd-4Er-0.4Zr alloy pig of preparation, the axial static pressure of 50MPa on vertical extruder at normal temperatures, and keeping 20 minutes is heated to 510 ℃ and be incubated 3h again in resistance furnace;
2) after, the alloy pig of taking-up step 1) is cooled to 370 ℃; Be placed on horizontal extruder and extrude the sheet material that thickness is 10mm with 1: 20 extrusion ratio; The sheet material that again extruding is obtained is 310 ℃ of insulations after 30 minutes; On double-roll rolling mill, be rolled to 5mm, obtain as complex matrix required magnesium alloy plate;
3), with step 2) magnesium alloy plate of preparation is placed in the smelting-casting equipment, heats, the upper surface temperature that guarantees sheet material is at 330 ℃;
4), be that the brilliant intermediate alloy of benchmark of 35Mg-50Zn-15Gd is heated to 650 ℃ with composition, it is dissolved obtains intermediate alloy liquid, on the magnesium alloy plate of step 3), make it cover the magnesium alloy plate matrix direct pouring of intermediate alloy liquid; After leaving standstill 1 minute, remove the baffle plate of smelting-casting equipment at once, composite board is taken out, invade in 80 ℃ the hot water, just obtain the brilliant composite wave-absorbing sheet material of magnesium alloy/standard;
Above-mentioned smelting-casting equipment is a box body, mainly comprises following two parts: 1) heatable base, 2) dismountable rectangular metal frame founding baffle plate on base.
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| CN201110350065.5A CN102501454B (en) | 2011-11-08 | 2011-11-08 | High-performance magnesium alloy wave-absorbing composite plate and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004948A (en) * | 2014-04-30 | 2014-08-27 | 燕山大学 | Super-light composite wave-absorbing plate material and preparation method thereof |
| CN109986061A (en) * | 2017-12-29 | 2019-07-09 | 南京理工大学 | A kind of multiple dimensioned preparation method that multi-layer sheet structure magnesium alloy is precipitated |
| CN110524412A (en) * | 2019-09-30 | 2019-12-03 | 清华大学 | A kind of Retaining Ring in Chemical Mechanical Polishing Process and chemically mechanical polishing carrier head |
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| JPH06307497A (en) * | 1993-04-19 | 1994-11-01 | Nippon Steel Corp | Excellently workable alloy type vibration damping steel plate |
| CN101942588A (en) * | 2010-07-06 | 2011-01-12 | 南京信息工程大学 | Magnesium alloy diatomite ferric oxide composite material and preparation method thereof |
| CN101942587A (en) * | 2010-07-06 | 2011-01-12 | 南京信息工程大学 | Magnesium alloy pumice ferric oxide cobalt composite material and preparation method thereof |
| CN102211005A (en) * | 2011-04-28 | 2011-10-12 | 山东大学 | Method for preparing magnetic graphite microspheres |
-
2011
- 2011-11-08 CN CN201110350065.5A patent/CN102501454B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06307497A (en) * | 1993-04-19 | 1994-11-01 | Nippon Steel Corp | Excellently workable alloy type vibration damping steel plate |
| CN101942588A (en) * | 2010-07-06 | 2011-01-12 | 南京信息工程大学 | Magnesium alloy diatomite ferric oxide composite material and preparation method thereof |
| CN101942587A (en) * | 2010-07-06 | 2011-01-12 | 南京信息工程大学 | Magnesium alloy pumice ferric oxide cobalt composite material and preparation method thereof |
| CN102211005A (en) * | 2011-04-28 | 2011-10-12 | 山东大学 | Method for preparing magnetic graphite microspheres |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004948A (en) * | 2014-04-30 | 2014-08-27 | 燕山大学 | Super-light composite wave-absorbing plate material and preparation method thereof |
| CN104004948B (en) * | 2014-04-30 | 2016-04-06 | 燕山大学 | A kind of ultralight composite wave-absorbing sheet material and preparation method thereof |
| CN109986061A (en) * | 2017-12-29 | 2019-07-09 | 南京理工大学 | A kind of multiple dimensioned preparation method that multi-layer sheet structure magnesium alloy is precipitated |
| CN110524412A (en) * | 2019-09-30 | 2019-12-03 | 清华大学 | A kind of Retaining Ring in Chemical Mechanical Polishing Process and chemically mechanical polishing carrier head |
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| CN102501454B (en) | 2014-09-10 |
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