CN101942618A - Magnesium-based block metal glass composite material and preparation method thereof - Google Patents
Magnesium-based block metal glass composite material and preparation method thereof Download PDFInfo
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- CN101942618A CN101942618A CN 201010503044 CN201010503044A CN101942618A CN 101942618 A CN101942618 A CN 101942618A CN 201010503044 CN201010503044 CN 201010503044 CN 201010503044 A CN201010503044 A CN 201010503044A CN 101942618 A CN101942618 A CN 101942618A
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Abstract
The invention discloses a magnesium (Mg)-based block metal glass composite material and a preparation method thereof. The Mg-based block metal glass composite material of the invention has the following components: 60 to 90 atomic percent of Mg, 1 to 15 atomic percent of Cu, 1 to 15 atomic percent of Ni, 1 to 15 atomic percent of Y and 1 to 15 atomic percent of Zn. The preparation method comprises the following steps of: preparing high-melting-point components in a reservation name component alloy into an intermediate alloy by an arc melting method; crushing the intermediate alloy; placing the crushed intermediate alloy, the Mg and the Zn into a contained together; preparing into a master alloy by adopting an induction melting method; remelting the master alloy by adopting the induction melting method; preparing liquid master alloy into a sectional bar by a low-pressure copper mould blow casting method; putting the sectional bar into a pretreated crucible after grinding and washing; heating a steel bar to a completely molten state or a solid-liquid two-phase state by adopting the induction melting method; and molding by adopting a consecutive solidification process after keeping temperature. The Mg-based block metal glass composite material prepared by the preparation method thereof has the advantages of obvious room temperature plasticity, structural homogeneity, and excellent performance.
Description
Technical field
The invention belongs to magnesium bast block metal glass technical field of material, particularly a kind of magnesium Ji Neisheng bulk metal glass composite material and preparation method thereof with obvious temperature-room type plasticity, homogeneous microstructure, excellent performance.
Background technology
The magnesium bast block metal glass is compared with traditional crystalline state magnesium alloy, and intensity and specific tenacity significantly improve, and the erosion resistance problem also is improved.But there is the total room temperature fragility problem of block metal glass in the magnesium bast block metal glass, has limited its application in structural timber.Therefore, capture the research focus that magnesium bast block metal glass room temperature fragility becomes domestic and international forefront.
Along with the continuous announcement of room temperature fragility essence and deepening continuously of research, giving birth to plasticity mutually compound in it is found that is to improve the brittle effective way of room temperature.(patent No.: CN101348889) add 13at%Fe in Mg65Cu7.5Ni7.5Zn5Ag5Y10, original position is separated out the Fe94Ni5Cul of rich Fe to patent on noncrystal substrate, and the intensity of matrix material has reached 900MPa, and compression plasticity is near 1%.(patent No.: CN101418423) by improving magnesium element content, preparation contains the magnesium base amorphous matrix material of α-Mg precipitated phase to patent, and the strain before the material fracture reaches 22%.
But because magnesium bast block metal glass self is very responsive to solidification rate, the tissue odds of magnesium bast block metal glass matrix material is even, and the top layer is pure amorphous layer, and core then is the two-phase complex tissue.Simultaneously, the quantity of interior looks, form, yardstick from outward appearance to inner essence also sharply change.Therefore performance also sharply changes, and only just has desirable tissue and performance in very little specific region.Obviously, this does not possess practicality.
Summary of the invention
The object of the present invention is to provide a kind of magnesium Ji Neisheng bulk metal glass composite material and preparation method thereof, open up the new way of preparation plasticity magnesium matrix body metal composite with obvious temperature-room type plasticity, homogeneous microstructure, excellent performance.
The technical solution that realizes the object of the invention is: a kind of composition range of magnesium bast block metal glass matrix material is: Mg content is 60-90at%, Cu content is 1-15at%, Ni content is 1-15at%, and Y content is 1-15at%, and Zn content is 1-15at%.The preparation method may further comprise the steps:
The first step: the high-melting-point constituent element that will be scheduled in the nominal composition alloy by arc melting method is prepared into master alloy;
Second step: the master alloy fragmentation is put into container with Mg, Zn, adopt induction melting to make mother alloy;
The 3rd step: adopt induction melting with the mother alloy remelting, blow casting by the low pressure copper mold liquid mother alloy is made section bar;
The 4th step: will put into the crucible of anticipating after section bar polishing, the cleaning, adopt induction melting that bar is heated to and melt fully or solid-liquid two-phase state, the technological forming of insulation back employing consecutive solidification.
The present invention compared with prior art, its remarkable advantage: 1, consecutive solidification technology is in the metal liquid process of setting, the employing compulsive means are in the frozen metal and do not set up the thermograde of specific direction in the solidified melt, thereby melt is solidified along the direction opposite with hot-fluid.Heat is along single axial heat radiation, and radial symmetry gradient goes to zero, and avoids radially cooling rate different and cause material structure inhomogeneous; 2, homogeneous microstructure, the performance homogeneous, mechanical property be improved significantly; 3, matrix material is elementary composition by routine, does not contain precious metal, and cost is low; 4, density is low, and the intensity height is a kind of ideal light-weight high-strength material.
Description of drawings
Fig. 1 is the preparation flow of IMC/BMG matrix material.
Fig. 2 is the matrix material microtexture shape appearance figure that adopts the identical component different process to prepare.
Fig. 3 is the DSC and the XRD data of the matrix material prepared of different process.Fig. 4 is the compression mechanical curves of the matrix material prepared of different process.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
In conjunction with Fig. 1, a kind of magnesium bast block metal glass of the present invention matrix material, the composition range of material is: Mg content is 60-90at%, and Cu content is 1-15at%, and Ni content is 1-15at%, and Y content is 1-15at%, Zn content is 1-15at%.
The preparation method of a kind of magnesium bast block metal glass of the present invention matrix material may further comprise the steps:
The first step: the high-melting-point constituent element that will be scheduled in the nominal composition alloy by arc melting method is prepared into master alloy;
Second step: the master alloy fragmentation is put into container with Mg, Zn, adopt induction melting to make mother alloy;
The 3rd step: adopt induction melting with the mother alloy remelting, blow casting by the low pressure copper mold liquid mother alloy is made section bar;
The 4th step: will put into the crucible of anticipating after section bar polishing, the cleaning, adopt induction melting that bar is heated to and melt fully or solid-liquid two-phase state, the technological forming of insulation back employing consecutive solidification.
Section bar induction melting under protection of inert gas described in the 4th step; prevent volatilization; the withdrawing rate of consecutive solidification technology is controlled at 1-20mm/s; the heat-eliminating medium of consecutive solidification technology is Ga-In-Sn liquid alloy or water; the holding temperature of consecutive solidification technology is 550-750 ℃, soaking time 1-60 minute.
Specific implementation process of the present invention is as follows:
(1) alloy melting:
According to each constituent element quality of composition design calculation, adopt the high pure metal constituent element to carry out proportioning.At first the high-melting-point constituent element is adopted water jacketed copper crucible non-consumable arc melting equipment to found into intermediate alloy ingot, under the argon gas atmosphere of the air-breathing purification of Ti, use arc melting, and adopt induction stirring, to guarantee to obtain the uniform master alloy of composition; Second step is the master alloy fragmentation, and puts into pretreated plumbago crucible after the low melting point constituent element mixes by the design mix proportioning, puts into furnace chamber and vacuumizes, and charges into argon gas as shielding gas, is smelted into mother alloy in induction furnace.
(2) forming materials:
An amount of master alloy ingot surface mechanical grinding is put into special silica tube, and system vacuumizes.After the induction heating remelting, under rare gas element (99.999% high-purity argon) protection, inject water cooled copper mould, obtain required sample after the cooling.The geometrical dimension of copper mold inner chamber can be adjusted as required.
(3) consecutive solidification
To utilize the low pressure copper mold to blow the bar of casting preparation, in the crucible of drying of packing into, charge into the high-purity argon gas protection after vacuumizing, regulate heating power, sample is heated to melts fully or solid-liquid two-phase state.Type of heating is the ruhmkorff coil heating, and heating power is decided on alloying constituent, and it is the extremely strong Ga-In-Sn liquid alloy of cooling power that heat-eliminating medium is immersed in the insulation back.
The present invention is solidified alloy liquid all the time along the direction of determining, heat is along single axial heat radiation, and radial symmetry gradient is tending towards 0, avoids radially cooling rate different and cause material structure inhomogeneous.Compare with traditional copper die cast technology, the tissue of sample that adopts the consecutive solidification prepared by the top layer to core homogeneous microstructure, excellent performance.
The invention will be further described below in conjunction with specific embodiment.
Embodiment 1
(1) choices of raw materials
The purity that the present invention prepares each metal constituent element that mother alloy selects for use is as table: the prescription of matrix material is Mg77Cu6Ni6Y6Zn5 (atomic percent).
Table 1 preparation master alloy ingot is selected the purity (%) of metal constituent element for use
(2) preparation of mother alloy
Under at first air-breathing, the high-purity argon gas protective condition, with founding intermediate alloy ingot from the non-consumable arc-melting furnace that grinds at Ti.The specific procedure of intermediate alloy ingot preparation is as follows:
After the surperficial mechanical grinding of fusing point higher metal raw material Cu, Y being removed the oxide skin on surface, get the raw materials ready according to the composition proportion material that select/designs; The material that will prepare according to the weight about every ingot 80g is put into the water jacketed copper crucible of smelting furnace, covers bell and is evacuated to 5 * 10-3Pa; In stove, charge into the high-purity argon gas (99.999%) of a certain amount of pressure.
Before founding master alloy ingot, will be used for air-breathing Ti ingot melting 3 times.
Multi-pass master alloy melting ingot: adopt the non-consumable tungsten electrode with alloy pig fusing 3 times, and apply function composite by electromagnetic stirring, the intermediate alloy ingot that obtains mixing.
Second step is with the Cu-Y master alloy fragmentation behind the scale removal; with put into pretreated plumbago crucible after low melting point constituent element Mg, Zn mix by the design mix proportioning; put into furnace chamber and vacuumize, charge into the 0.5Mpa argon gas, in induction furnace, be smelted into mother alloy as shielding gas
(3) sample moulding
With master alloy ingot surface mechanical grinding, the shaping system that places water jacketed copper crucible and water cooled copper mould to combine closely.System is evacuated to 5 * 10-3Pa; After the induction heating remelting, under certain rare gas element (99.999% high-purity argon) protective atmosphere, spray in the water cooled copper mould after the remelting of employing induction melting, promptly obtain required sample after the cooling.The pressure difference of jet flow stream and body of heater is about 0.05MPa, and length is 50mm, and diameter 3mm also can adjust according to demand.
(4) consecutive solidification
Will utilize the low pressure copper mold blow the bar of casting preparation, the internal diameter of packing into is 3mm, wall thickness is in the plumbago crucible of 1mm, plumbago crucible in 200 ℃ of baking ovens dry 2 hours in advance.After furnace chamber is evacuated to 5 * 10-3Pa, charge into the high-purity argon gas protection, regulate heating power, sample is heated to melts fully or solid-liquid two-phase state.Holding temperature is 600 ℃, insulation 15min, and the withdrawing rate immersion heat-eliminating medium with 6mm/s is the extremely strong Ga-In-Sn liquid alloy of cooling power then.
Fig. 2 (a) and (b) be the matrix material section structure shape appearance figure that adopts identical component Mg77Cu6Ni6Y6Zn5 different process to prepare.Shown in Fig. 2 (a), the sample of employing traditional copper die cast prepared is organized extremely inhomogeneous, and the top layer is pure amorphous layer, and core is the two-phase complex tissue.And the sample tissue of the preparation of adopting new technology by skin to central tissue even (Fig. 2 b), can find that in addition the size of precipitated phase is basic identical, got rid of of the influence of the size of precipitated phase to mechanical property.
Fig. 3 is X-ray diffraction analysis and DSC data, and the matrix that obtains the matrix material by different process preparation by analysis is identical with the composition of precipitated phase, and both precipitated phase volume fractions are identical, thereby has got rid of the influence of precipitated phase volume fraction to mechanical property.All have typical amorphous in the XRD diffraction spectra of the matrix material of different process and disperse peak and Mg crystalline diffraction peak.The DSC of the matrix material of different process exists identical glass transformation temperature Tg and crystallization temperature Tx simultaneously.
Fig. 4 is the compression mechanical curves of the matrix material prepared of different process.Mechanics Performance Testing is the result show: the matrix material compression plasticity by the preparation of consecutive solidification method reaches 19.5%, blows casting than traditional low pressure copper mold and improves 14.2%.Experiment condition is: sample is
Column sample, experimental temperature are room temperature (25 degree), and compressive strain speed is 2 * 10-4s-1.
Fact proved, than the magnesium-base metal glass matrix material of traditional technology preparation, even, the excellent performance of microstructure of composite after the employing consecutive solidification art breading.
Adopt the preparation method identical with embodiment 1, the prescription of matrix material is Mg74Cu7Ni7Y7Zn5, and the withdrawing rate of consecutive solidification is 5mm/s.The microstructure of composite that is prepared into is even, compression plasticity reaches 12.3%.
Embodiment 3
Adopt the preparation method identical with embodiment 1, the prescription of matrix material is Mg71Cu8Ni8Y8Zn5, and the withdrawing rate of consecutive solidification is 4mm/s.The microstructure of composite that is prepared into is even, compression plasticity reaches 8.3%.
Claims (6)
1. magnesium bast block metal glass matrix material, it is characterized in that: the composition range of material is: Mg content is 60-90at%, and Cu content is 1-15at%, and Ni content is 1-15at%, and Y content is 1-15at%, Zn content is 1-15at%.
2. the preparation method of a magnesium bast block metal glass matrix material is characterized in that may further comprise the steps:
The first step: the high-melting-point constituent element that will be scheduled in the nominal composition alloy by arc melting method is prepared into master alloy;
Second step: the master alloy fragmentation is put into container with Mg, Zn, adopt induction melting to make mother alloy;
The 3rd step: adopt induction melting with the mother alloy remelting, blow casting by the low pressure copper mold liquid mother alloy is made section bar;
The 4th step: will put into the crucible of anticipating after section bar polishing, the cleaning, adopt induction melting that bar is heated to and melt fully or solid-liquid two-phase state, the technological forming of insulation back employing consecutive solidification.
3. magnesium bast block metal glass composite material and preparation method thereof according to claim 2 is characterized in that: section bar induction melting under protection of inert gas described in the 4th step prevents volatilization.
4. magnesium bast block metal glass composite material and preparation method thereof according to claim 2 is characterized in that: the withdrawing rate of consecutive solidification technology is controlled at 1-20mm/s in the 4th step.
5. magnesium bast block metal glass composite material and preparation method thereof according to claim 2 is characterized in that: the heat-eliminating medium of consecutive solidification technology is Ga-In-Sn liquid alloy or water in the 4th step.
6. magnesium bast block metal glass composite material and preparation method thereof according to claim 2 is characterized in that: the holding temperature of consecutive solidification technology is 550-750 ℃ in the 4th step, soaking time 1-60 minute.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209490A (en) * | 2014-09-26 | 2014-12-17 | 东莞台一盈拓科技股份有限公司 | Fusion die-casting method of amorphous alloy cold crucible |
| CN107513650A (en) * | 2017-09-04 | 2017-12-26 | 苏州雾联医疗科技有限公司 | Intelligent atomizer metal mesh sheet |
| CN106552928B (en) * | 2016-11-16 | 2018-09-11 | 南京工程学院 | A kind of titanium alloy gradient composites and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1548572A (en) * | 2003-05-16 | 2004-11-24 | 中国科学院金属研究所 | Endogenous composite material of high-strength magnesium-base metallic glass |
| CN1597180A (en) * | 2004-08-02 | 2005-03-23 | 中国科学院金属研究所 | Integral easting method of cast steel supporting roller |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1548572A (en) * | 2003-05-16 | 2004-11-24 | 中国科学院金属研究所 | Endogenous composite material of high-strength magnesium-base metallic glass |
| CN1597180A (en) * | 2004-08-02 | 2005-03-23 | 中国科学院金属研究所 | Integral easting method of cast steel supporting roller |
Non-Patent Citations (2)
| Title |
|---|
| 《轻合金加工技术》 20051231 黎业生等 镁基大块金属玻璃的研究及其制备 1-5 1-6 第33卷, 第9期 2 * |
| 《铸造》 20050831 黎业生等 镁基大块金属玻璃的制备及研究进展 754-748 1-6 第54卷, 第8期 2 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209490A (en) * | 2014-09-26 | 2014-12-17 | 东莞台一盈拓科技股份有限公司 | Fusion die-casting method of amorphous alloy cold crucible |
| CN104209490B (en) * | 2014-09-26 | 2017-01-18 | 东莞帕姆蒂昊宇液态金属有限公司 | Fusion die-casting method of amorphous alloy cold crucible |
| CN106552928B (en) * | 2016-11-16 | 2018-09-11 | 南京工程学院 | A kind of titanium alloy gradient composites and preparation method thereof |
| CN107513650A (en) * | 2017-09-04 | 2017-12-26 | 苏州雾联医疗科技有限公司 | Intelligent atomizer metal mesh sheet |
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