CN105063517B - Method for preparing Sm-Co-Fe-Al-B amorphous matrix hard magnetic alloy - Google Patents
Method for preparing Sm-Co-Fe-Al-B amorphous matrix hard magnetic alloy Download PDFInfo
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- 239000000956 alloy Substances 0.000 claims abstract description 145
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 141
- 238000002360 preparation method Methods 0.000 claims abstract description 42
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- 230000006698 induction Effects 0.000 claims description 5
- 229910000808 amorphous metal alloy Inorganic materials 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
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Abstract
The invention discloses a method for preparing Sm-Co-Fe-Al-B amorphous matrix hard magnetic alloy, and relates to magnetic materials containing rare-earth metal and magnetic transition metal. The method is for preparing Sm-Co-Fe-Al-B quinary series rapid quenching alloy strips. The method comprises the steps that according to the element composition formula SmxCoyFezAluBv, the atomic percentage of the element component x is 10 to 20, the atomic percentage of the element component y is 50 to 60, the atomic percentage of the element component z is 10 to 15, the atomic percentage of the element component u is 10 to 20, the atomic percentage of the element component v is 5 to 10, and composition proportions meet the formula that x+y+z+u+v=100; and a needed quantity of raw materials are weighed for preparation. The Sm-Co-Fe-Al-B amorphous matrix hard magnetic alloy which is of a special cellular structure and obtained through vacuum melting and a melt rapid quenching technology has high coercivity and overcomes the defect that in the prior art, Sm-Co-Al amorphous alloy does not show hard magnetism or has very poor coercivity.
Description
Technical field
Technical scheme is related to the magnetic material containing rare earth metal and magnetic transition metal, specifically sm-
The preparation method of co-fe-al-b amorphous base magnetically hard alloy.
Background technology
Amorphous state refers to that in material internal structure, atom is in a kind of state that longrange disorder arranges.Late 1980s with
Come, with inoue (inoue a., zhang t., zhang w., takeuchi a.bulk nd-fe-al amorphous
alloys with hard magnetic properties[j].materials transactions,jim,1996,37
: 99-108) and johnson (johnson w.l., physics and metallurgy of bulk glass (2)
forming alloys,in:the science of alloys for the 21st century:a hume-rothery
symposium celebration,october 18,2000-october 20,2000,minerals,metals and
Materials society, st.louis, mo, united states, 2000, pp.183-199) be representative Japan and U.S.
State's researcher greatly reduces, by controlling alloying component, the critical cooling rate obtaining non crystalline structure respectively, with traditional
Slow cooling solidification technology develops a series of alloy systems with very strong amorphous formation ability, such as inoue et al. (inoue a.,
zhang t.,zhang w.,takeuchi a.bulk nd-fe-al amorphous alloys with hard
magnetic properties[j].materials transactions,jim,1996,37(2):99-108；inoue a.,
zhang t.thermal stability and glass-forming ability of amorphous nd-al-tm(tm
=fe, co, ni or cu) alloys [j] .mat sci eng a-struct, 1997,226-228:393-396) cast with copper mold
Make the nd that method is prepared for a diameter of 4mm at room temperature60fe30al10Cylinder amorphous, its remanent magnetism is 0.122t, and coercivity reaches
277ka/m(3.5koe).Document (fan g.j.,w.,roth s.,et al.glass-forming ability of
Re-al-tm alloys (re=sm, y；Tm=fe, co, cu) [j] .acta mater, 2000,48 (15): 3823-3831) report
Road copper mold casting method has obtained as cast condition sm60co10fe20al10、sm60co5fe20al10cu5And sm60co15fe10al10cu5Amorphous
Based alloy, but wherein only have sm60co15fe10al10cu5Amorphous based alloy shows ferromagnetic sexual behaviour, and its coercivity is 28ka/m,
Remanent magnetism 0.048t, maximal magnetization intensity 0.103t；And sm60co15fe10al10cu5Strip non-crystaline amorphous metal does not have magnetic at room temperature yet
Property.Cn1869274a discloses a kind of composition range of sm-al-co system sm base ternary block amorphous alloy, and its composition range is
smx(al50-yco50+y)100-x(x=50～58at%, y=-10～+7at%), optimal amorphous formation composition is sm50al25co25,
It can obtain the bulk amorphous alloy of a diameter of 3mm using copper mold.But, sm54al23co23、sm52al24co24、sm50al25co25
Bulk amorphous alloy shows as paramagnetism (c.l.lu, h.m.liu, k.f.wang, et al.magnetic properties in room temperature
of sm-based bulk metallic glasses[j].journal of magnetism and magnetic
materials,2010,322(19):2845-2850).
In a word, sm-co-al type non-crystaline amorphous metal of the prior art, including sm-co-al, sm-co-fe-al, sm-co-
Fe-al-cu bulk amorphous alloy does not all show hard magnetic or coercivity very little it is necessary to research and develop the new sm- with high-coercive force
Co-al type amorphous base magnetically hard alloy.
Content of the invention
The technical problem to be solved is: the preparation method of sm-co-fe-al-b amorphous base magnetically hard alloy is provided,
It is a kind of preparation method of five yuan of serial melt spun alloy strips of sm-co-fe-al-b, thus obtained sm-co-fe-al-b amorphous
Base magnetically hard alloy has the amorphous based structures of special cellular structure, and obtains high coercivity, overcomes of the prior art
Sm-co-al type non-crystaline amorphous metal does not show hard magnetic or the defect of coercivity very little.
The present invention solves this technical problem the technical scheme is that sm-co-fe-al-b amorphous base magnetically hard alloy
Preparation method, is a kind of preparation method of five yuan of serial melt spun alloy strips of sm-co-fe-al-b, specifically comprises the following steps that
The first step, preparation of raw material:
According to elementary composition formula smxcoyfezalubv, the atomic percentage of wherein elementary composition composition is x=10～20, y
The composition proportion of=50～60, z=10～15, u=10～20, v=5～10, and x+y+z+u+v=100, weighs and needs quantity
Purity be sm, co, fe, al and b of mass percent >=99.9% and prepared, or sm, co, fe, al and contain 19wt%
The b-fe alloy of b-81wt%fe is prepared, and add more by mentioned component proportioning weighed the 5wt% of pure sm～
The compensation of the sm of 10wt% volatile quantity as melting with during getting rid of band, thus completes preparation of raw material；
Second step, prepares mother alloy ingot:
The raw material vacuum arc melting furnace that prepare the first step or vacuum induction melting furnace master alloy melting, true in stove
Reciprocal of duty cycle is less than 5 × 10-2Pa, makes whole raw metals be completely melt, and is sufficiently mixed, prepared mother alloy ingot；
3rd step, the preparation of sm-co-fe-al-b amorphous base magnetically hard alloy:
Mother alloy ingot prepared by second step loads in fast melt-quenching stove, and in stove, suction is to less than 5 × 10-2Pa,
Again mother alloy ingot is melted, and the roller speed with 15m/s～50m/s, alloy is got rid of into strip, be obtained have special
The sm-co-fe-al-b amorphous base magnetically hard alloy of cellular structure.
The preparation method of above-mentioned sm-co-fe-al-b amorphous base magnetically hard alloy, obtained has special cellular structure
Sm-co-fe-al-b amorphous base magnetically hard alloy under the external magnetic field of 20koe, its intensity of magnetization be 26.1emu/g～
86.6emu/g, remanent magnetism is 12.4emu/g～40.6emu/g, and coercivity is 1034.6oe～19613.0oe.
The preparation method of above-mentioned sm-co-fe-al-b amorphous base magnetically hard alloy, used raw material and equipment are by known
Approach obtain, operating procedure is that those skilled in the art can grasp.
The invention has the beneficial effects as follows: compared with prior art, the prominent substantive distinguishing features of the present invention are: about grinding
Study carefully and show, although the alloying component of sm-co-al, sm-co-fe-al and sm-co-fe-al-cu of high sm content can obtain entirely
The block alloy of amorphous, but its room temperature shows as paramagnetism.One of prominent substantive distinguishing features of the present invention are: taken with fe atom
For the part co atom in sm-co phase, improve the intensity of magnetization of strip；Using al element low melting point and with other constituent elements
Between the negative heat of mixing, add al to improve the amorphous formation ability of fast quenching thin strap；The atomic radius very little of b atom is permissible
Enter interstitial void, increase atom packing density, make atom mobile difficult, after quickly cooling down, promote the atomic disorder group of liquid phase
State is partly remained, thus forming the amorphous phase of high-load in strip.Another prominent substantive spy of the present invention
Point is: this series alloy has cellular structure, and is amorphous nano-crystalline composite construction, wherein, sm- inside cellular structure
(co, m) main crystalline phases be present in intracellular noncrystal substrate with nanocluster form, cell wall is multiple Hard Magnetics, soft magnetism and non-magnetic are received
Rice crystalline phases mixing, by the collective effect of the coupling between intracellular and cell wall difference magnetic phase and cell wall pinning, makes non-
Brilliant base magnetically hard alloy thin strip magnet obtains excellent hard magnetic property.
Compared with prior art, the marked improvement of the present invention is: in sm-co-al alloy compound with the addition of relatively honest and clean
Fe and b of valency or b-fe alloy, using vacuum melting and fast melt-quenching technology, obtain the amorphous base strip of cell structure, no
The subsequent heat treatment such as subsequent annealing and solid solution aging must be carried out, thus the inventive method simplifies technique, reduces cost, favorably
In production in enormous quantities.The sm-co-fe-al-b amorphous base magnetically hard alloy that the inventive method is obtained has special cellular structure
Amorphous based structures, and obtain high coercivity, overcome sm-co-al type non-crystaline amorphous metal of the prior art and do not show Hard Magnetic
Property or the defect of coercivity very little.
Brief description
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the sm of embodiment 115co55fe10al15b5The x-ray diffraction collection of illustrative plates of alloy thin strip magnet.
Fig. 2 is the sm of embodiment 115co55fe10al15b5The scanning electron microscopy picture of alloy thin strip magnet.
Fig. 3 is the sm of embodiment 115co55fe10al15b5The transmission electron microscope image of alloy thin strip magnet.
Fig. 4 is the sm of embodiment 115co55fe10al15b5The hysteresis curve of alloy thin strip magnet.
Fig. 5 is the sm of embodiment 215co50fe10al20b5The x-ray diffraction collection of illustrative plates of alloy thin strip magnet.
Fig. 6 is the sm of embodiment 215co50fe10al20b5The scanning electron microscopy picture of alloy thin strip magnet.
Fig. 7 is the sm of embodiment 215co50fe10al20b5The transmission electron microscope image of alloy thin strip magnet.
Fig. 8 is the sm of embodiment 215co50fe10al20b5The hysteresis curve of alloy thin strip magnet.
Fig. 9 is the sm of embodiment 320co50fe10al13b7The x-ray diffraction collection of illustrative plates of alloy thin strip magnet.
Figure 10 is the sm of embodiment 320co50fe10al13b7The scanning electron microscopy picture of alloy thin strip magnet.
Figure 11 is the sm of embodiment 320co50fe10al13b7The hysteresis curve of alloy thin strip magnet.
Figure 12 is the sm of embodiment 410co60fe15al10b5The x-ray diffraction collection of illustrative plates of alloy thin strip magnet.
Figure 13 is the sm of embodiment 410co60fe15al10b5The scanning electron microscopy picture of alloy thin strip magnet.
Figure 14 is the sm of embodiment 410co60fe15al10b5The hysteresis curve of alloy thin strip magnet.
Figure 15 is the sm of embodiment 520co50fe15al10b5The x-ray diffraction collection of illustrative plates of alloy thin strip magnet.
Figure 16 is the sm of embodiment 520co50fe15al10b5The hysteresis curve of alloy thin strip magnet.
Figure 17 is the sm of embodiment 615co50fe10al15b10The x-ray diffraction collection of illustrative plates of alloy thin strip magnet.
Figure 18 is the sm of embodiment 615co50fe10al15b10The hysteresis curve of alloy thin strip magnet.
Specific embodiment
Embodiment 1
The sm of sm-co-fe-al-b amorphous base magnetically hard alloy15co55fe10al15b5The preparation method of magnet.
The first step, preparation of raw material:
According to elementary composition formula sm15co55fe10al15b5Atomic percent composition proportion, weigh the purity needing quantity
It is sm, co, fe, al of mass percent >=99.9% and the b-fe alloy containing 19wt%b-81wt%fe is prepared, and
And the compensation adding the sm volatile quantity as melting and during getting rid of band of 8wt% being weighed pure sm by mentioned component proportioning, more
Thus complete preparation of raw material；
Second step, prepares mother alloy ingot:
The raw material that the first step is prepared vacuum arc melting furnace master alloy melting, in stove, vacuum is less than 5 × 10- 2Pa, makes whole raw metals be completely melt, and is sufficiently mixed, prepared sm15co55fe10al15b5Mother alloy ingot；
3rd step, the preparation of sm-co-fe-al-b amorphous base magnetically hard alloy:
Sm prepared by second step15co55fe10al15b5Mother alloy ingot loads in fast melt-quenching stove, suction in stove
To less than 5 × 10-2This mother alloy ingot is melted by pa again, and the roller speed with 40m/s, and alloy is got rid of into strip, is obtained
Sm-co-fe-al-b amorphous base magnetically hard alloy, is the sm with special cellular structure15co55fe10al15b5Amorphous base Hard Magnetic closes
Gold.
This born of the same parents shape sm15co55fe10al15b5The thickness of amorphous base magnetically hard alloy strip is 35 μm, and its x-ray diffraction collection of illustrative plates is such as
Shown in Fig. 1, in this collection of illustrative plates, visible obvious diffusing scattering peak, shows to define more amorphous phase in this alloy, and certainly has
sm(co,m)7Phase, sm2(co,m)7Phase, sm2co7b3Phase, al192.40fe42.66Phase and sm2fe15al2The diffraction maximum of phase, illustrates this conjunction
Golden thin strip magnet thing phase composition is that amorphous state matrix is coexisted with crystalline phases, and its principal crystalline phase sm (co, m)7Average grain size be
20nm.Fig. 2 is sm15co55fe10al15b5The scanning electron microscopy picture of thin strip magnet, it shows that the microstructure of this alloy is
The petal-shaped being formed by the structure of a lot of Semen Juglandis shapes, grain size differs, and illustrates that the microscopic appearance of this alloy is that multiphase is common
The result of effect.Fig. 3 is sm15co55fe10al15b5The transmission electron microscope image of thin strip magnet, it shows in this alloy thin band
Portion defines the cellular structure of ellipse, and the size of cellular structure is 100nm～0.1 μm, the wherein a width of 20-50nm of cell wall, bag
Containing multiple crystalline phases；Intracellular is organized as amorphous and the composite construction of crystalline state nanometer phase.Obtained by the present embodiment
sm15co55fe10al15b5Amorphous base magnetically hard alloy thin strip magnet at room temperature, after magnetizing in 60koe external magnetic field, in external magnetic field
For measuring magnetic property on the vibrating specimen magnetometer of 20koe, its coercivity is 19613.0oe, and remanent magnetism is 32.7emu/g, maximum
The intensity of magnetization is 37.0emu/g, and its hysteresis curve is shown in Fig. 4.
Embodiment 2
The sm of sm-co-fe-al-b amorphous base magnetically hard alloy15co50fe10al20b5The preparation method of magnet.
The first step, preparation of raw material:
According to elementary composition formula sm15co50fe10al20b5Atomic percent composition proportion, weigh the purity needing quantity
It is sm, co, fe, al of mass percent >=99.9% and the b-fe alloy containing 19wt%b-81wt%fe is prepared, and
And the compensation adding the sm volatile quantity as melting and during getting rid of band of 7wt% being weighed pure sm by mentioned component proportioning, more
Thus complete preparation of raw material；
Second step, prepares mother alloy ingot:
The raw material that the first step is prepared vacuum induction melting furnace master alloy melting, in stove, vacuum is less than 5 × 10- 2Pa, makes whole raw metals be completely melt, and is sufficiently mixed, prepared sm15co50fe10al20b5Mother alloy ingot；
3rd step, the preparation of sm-co-fe-al-b amorphous base magnetically hard alloy:
Mother alloy ingot prepared by second step loads in fast melt-quenching stove, and in stove, suction is to less than 5 × 10-2Pa,
Again mother alloy ingot is melted, and the roller speed with 35m/s, alloy is got rid of into strip, prepared sm-co-fe-al-b amorphous
Base magnetically hard alloy, is the sm with special cellular structure15co50fe10al20b5Amorphous base magnetically hard alloy.
This born of the same parents shape sm15co55fe10al15b5The thickness of amorphous base magnetically hard alloy strip is 40 μm, and its x-ray diffraction collection of illustrative plates is such as
Shown in Fig. 5, this collection of illustrative plates shows that Fig. 1 that the intensity of diffraction maximum is compared in embodiment 1 have dropped half, illustrates that the present embodiment is obtained
Born of the same parents shape sm15co50fe10al20b5Crystalline phases in amorphous base magnetically hard alloy are less, but still suffer from sm (co, m)7Phase, sm2(co,
m)7Phase, sm2co7b3Phase, al192.40fe42.66Phase and sm2fe15al2The diffraction maximum of phase, and principal crystalline phase sm (co, m)7Crystallite dimension be
17.0nm.Fig. 6 is sm15co50fe10al20b5The scanning electron microscopy picture of amorphous base magnetically hard alloy strip, it shows this alloy
Microscopic appearance be in random network structure.Fig. 7 is sm15co50fe10al20b5The transmission electron microscope image of alloy thin strip magnet,
It shows the polygon-shaped cellular structure of this alloy thin band, cellular structure a size of 100～200nm, and cell wall width is little
In 20nm.Sm obtained by the present embodiment15co50fe10al20b5Amorphous base magnetically hard alloy thin strip magnet fills in 60koe external magnetic field
After magnetic, measure magnetic property on external magnetic field is for the vibrating specimen magnetometer of 20koe, its coercivity is 12820.0oe, remanent magnetism is
27.9emu/g, maximal magnetization intensity is 35.8emu/g, and its hysteresis curve is shown in Fig. 8.
Embodiment 3
The sm of sm-co-fe-al-b amorphous base magnetically hard alloy20co50fe10al13b7The preparation method of magnet.
The first step, preparation of raw material:
According to elementary composition formula sm20co50fe10al13b7Atomic percent composition proportion, weigh the purity needing quantity
Sm, co, fe, al and b of being mass percent >=99.9% are prepared, and add more and weighed by mentioned component proportioning
The compensation of the sm of the 5wt% of pure sm volatile quantity as melting with during getting rid of band, thus completes preparation of raw material；
Second step, prepares mother alloy ingot:
The raw material that the first step is prepared vacuum arc melting furnace master alloy melting, in stove, vacuum is less than 5 × 10- 2Pa, makes whole raw metals be completely melt, and is sufficiently mixed, prepared sm20co50fe10al13b7Mother alloy ingot；
3rd step, the preparation of sm-co-fe-al-b amorphous base magnetically hard alloy:
Mother alloy ingot prepared by second step loads in fast melt-quenching stove, and in stove, suction is to less than 5 × 10-2Pa,
Again mother alloy ingot is melted, and the roller speed with 40m/s, alloy is got rid of into strip, prepared sm-co-fe-al-b amorphous
Base magnetically hard alloy, is the sm with special cellular structure20co50fe10al13b7Amorphous base magnetically hard alloy.
This born of the same parents shape sm20co50fe10al13b7The thickness of amorphous base magnetically hard alloy strip is 30 μm, and its x-ray diffraction collection of illustrative plates is such as
Shown in Fig. 9, this collection of illustrative plates shows that the intensity of diffraction maximum is relatively low and there occurs significantly wideization, illustrates wherein to contain substantial amounts of non-
Crystalline substance, main crystalline phases are smco7、sm2co7、smco2And alfe.Figure 10 is sm20co50fe10al13b7The sweeping of alloy thin strip magnet
Retouch electron micrograph image, therefrom see in sm20co50fe10al13b7It is dispersed with rotten on the noncrystal substrate of amorphous base magnetically hard alloy
The hole of the crystalline phases of eating away.Sm obtained by the present embodiment20co50fe10al13b7Amorphous base magnetically hard alloy thin strip magnet is in 60koe
After magnetizing in external magnetic field, measure magnetic property on external magnetic field is for the vibrating specimen magnetometer of 20koe, its coercivity is
10898.0oe, remanent magnetism is 24.1emu/g, and maximal magnetization intensity is 26.1emu/g, and its hysteresis curve is shown in Figure 11.
Embodiment 4
The sm of sm-co-fe-al-b amorphous base magnetically hard alloy10co60fe15al10b5The preparation method of magnet.
The first step, preparation of raw material:
According to elementary composition formula sm10co60fe15al10b5Atomic percent composition proportion, weigh the purity needing quantity
It is sm, co, fe, al of mass percent >=99.9% and the b-fe alloy containing 19wt%b-81wt%fe is prepared, and
And the compensation adding the sm volatile quantity as melting and during getting rid of band of 10wt% being weighed pure sm by mentioned component proportioning, more
Thus complete preparation of raw material；
Second step, prepares mother alloy ingot:
The raw material that the first step is prepared vacuum induction melting furnace master alloy melting, in stove, vacuum is less than 5 × 10- 2Pa, makes whole raw metals be completely melt, and is sufficiently mixed, prepared sm10co60fe15al10b5Mother alloy ingot；
3rd step, the preparation of sm-co-fe-al-b amorphous base magnetically hard alloy:
Mother alloy ingot prepared by second step loads in fast melt-quenching stove, and in stove, suction is to less than 5 × 10-2Pa,
Again mother alloy ingot is melted, and the roller speed with 50m/s, alloy is got rid of into strip, prepared sm-co-fe-al-b amorphous
Base magnetically hard alloy, is the sm with special cellular structure10co60fe15al10b5Amorphous base magnetically hard alloy.
This born of the same parents shape sm10co60fe15al10b5The thickness of amorphous base magnetically hard alloy strip is 25 μm, and its x-ray diffraction collection of illustrative plates is such as
Shown in Figure 12, this collection of illustrative plates shows born of the same parents shape sm10co60fe15al10b5The main crystalline phases of amorphous base magnetically hard alloy are sm2co17、
cofe、smco3b2And feb.Figure 13 is sm10co60fe15al10b5The scanning electron microscopy picture of alloy thin strip magnet, this figure shows
Substantial amounts of crystalline phases are contained in this alloy thin band.Sm obtained by the present embodiment10co60fe15al10b5Amorphous base magnetically hard alloy is thin
After magnet carrier magnetizes in 60koe external magnetic field, on external magnetic field is for the vibrating specimen magnetometer of 20koe, measure magnetic property, it is rectified
Stupid power is 1034.6oe, and remanent magnetism is 12.4emu/g, and maximal magnetization intensity is 86.6emu/g, and its hysteresis curve is shown in Figure 14.
Embodiment 5
The sm of sm-co-fe-al-b amorphous base magnetically hard alloy20co50fe15al10b5The preparation method of magnet.
The first step, preparation of raw material:
According to elementary composition formula sm20co50fe15al10b5Atomic percent composition proportion, weigh the purity needing quantity
It is sm, co, fe, al of mass percent >=99.9% and the b-fe alloy containing 19wt%b-81wt%fe is prepared, and
And the compensation adding the sm volatile quantity as melting and during getting rid of band of 5wt% being weighed pure sm by mentioned component proportioning, more
Thus complete preparation of raw material；
Second step, prepares mother alloy ingot:
The raw material that the first step is prepared vacuum arc melting furnace master alloy melting, in stove, vacuum is less than 5 × 10- 2Pa, makes whole raw metals be completely melt, and is sufficiently mixed, prepared sm20co50fe15al10b5Mother alloy ingot；
3rd step, the preparation of sm-co-fe-al-b amorphous base magnetically hard alloy:
Mother alloy ingot prepared by second step loads in fast melt-quenching stove, and in stove, suction is to less than 5 × 10-2Pa,
Again mother alloy ingot is melted, and the roller speed with 15m/s, alloy is got rid of into strip, prepared sm-co-fe-al-b amorphous
Base magnetically hard alloy, is the sm with special cellular structure20co50fe15al10b5Amorphous base magnetically hard alloy.
This born of the same parents shape sm20co50fe15al10b5The thickness of amorphous base magnetically hard alloy strip is 50 μm, and its x-ray diffraction collection of illustrative plates is such as
Shown in Figure 15, this collection of illustrative plates shows born of the same parents shape sm20co50fe15al10b5A certain amount of amorphous is contained in amorphous base magnetically hard alloy strip,
Main crystalline phases are smco7、sm2co7、smco2And al13co4.Sm obtained by the present embodiment20co50fe15al10b5Amorphous base is hard
After magnetic alloy thin strip magnet magnetizes in 60koe external magnetic field, measure magnetic on external magnetic field is for the vibrating specimen magnetometer of 20koe
Can, its coercivity is 6800.9oe, and remanent magnetism is 40.6emu/g, and maximal magnetization intensity is 48.9emu/g, and its hysteresis curve is shown in
Figure 16.
Embodiment 6
The sm of sm-co-fe-al-b amorphous base magnetically hard alloy15co50fe10al15b10The preparation method of magnet.
The first step, preparation of raw material:
According to elementary composition formula sm15co50fe10al15b10Atomic percent composition proportion, weigh the purity needing quantity
Sm, co, fe, al and b of being mass percent >=99.9% are prepared, and add more and weighed by mentioned component proportioning
The compensation of the sm of the 9wt% of pure sm volatile quantity as melting with during getting rid of band, thus completes preparation of raw material；
Second step, prepares mother alloy ingot:
The raw material that the first step is prepared vacuum induction melting furnace master alloy melting, in stove, vacuum is less than 5 × 10- 2Pa, makes whole raw metals be completely melt, and is sufficiently mixed, prepared sm15co50fe10al15b10Mother alloy ingot；
3rd step, the preparation of sm-co-fe-al-b amorphous base magnetically hard alloy:
Mother alloy ingot prepared by second step loads in fast melt-quenching stove, and in stove, suction is to less than 5 × 10-2Pa,
Again mother alloy ingot is melted, and the roller speed with 30m/s, alloy is got rid of into strip, prepared sm-co-fe-al-b amorphous
Base magnetically hard alloy, is the sm with special cellular structure15co50fe10al15b10Amorphous base magnetically hard alloy.
This born of the same parents shape sm15co50fe10al15b10The thickness of amorphous base magnetically hard alloy strip is 42 μm, its x-ray diffraction collection of illustrative plates
As shown in figure 17, born of the same parents' shape sm15co50fe10al15b10A certain amount of amorphous, main crystalline state is contained in amorphous base magnetically hard alloy strip
It is mutually smco7、sm2co7、sm2co7b3, alfe and smfe2.The sm that the present embodiment is obtained15co50fe10al15b10Amorphous base Hard Magnetic closes
After golden thin strip magnet magnetizes in 60koe external magnetic field, on external magnetic field is for the vibrating specimen magnetometer of 20koe, measure magnetic property,
Its coercivity is 17186.0oe, and remanent magnetism is 25.4emu/g, and maximal magnetization intensity is 30.4emu/g, and its hysteresis curve is shown in figure
18.
In above-described embodiment, because the boiling point of sm is relatively low, therefore many interpolations are as alleged by the composition proportion of elementary composition formula respectively
Take the compensation of sm volatile quantity as melting and during getting rid of band of the 5wt%～10wt% of pure sm.
Raw materials used in above-described embodiment is all commercially available commodity, and the purity of sm, co, fe, b and b-fe alloy is quality
Percent >=99.9%；Equipment used and technique are all conventional equipment well-known in the art and technique.
Claims (2)
- The preparation method of 1.sm-co-fe-al-b amorphous base magnetically hard alloy it is characterised in that: be a kind of sm-co-fe-al-b five The preparation method of unit's series melt spun alloy strip, specifically comprises the following steps thatThe first step, preparation of raw material:According to elementary composition formula smxcoyfezalubv, the atomic percentage of wherein elementary composition composition is x=10～20, y=50 The composition proportion of～60, z=10～15, u=10～20, v=5～10, and x+y+z+u+v=100, weighs and needs the pure of quantity Degree is sm, co, fe, al and b of mass percent >=99.9% and is prepared, or sm, co, fe, al and contain 19wt%b- The b-fe alloy of 81wt%fe is prepared, and adds the 5wt%～10wt% being weighed pure sm by mentioned component proportioning more Sm volatile quantity as melting and during getting rid of band compensation, thus complete preparation of raw material；Second step, prepares mother alloy ingot:The raw material vacuum arc melting furnace that prepare the first step or vacuum induction melting furnace master alloy melting, vacuum in stove Less than 5 × 10-2Pa, makes whole raw metals be completely melt, and is sufficiently mixed, prepared mother alloy ingot；3rd step, the preparation of sm-co-fe-al-b amorphous base magnetically hard alloy:Mother alloy ingot prepared by second step loads in fast melt-quenching stove, and in stove, suction is to less than 5 × 10-2Pa, again Mother alloy ingot is melted, and the roller speed with 15m/s～50m/s, alloy is got rid of into strip, is obtained and there is cellular structure Sm-co-fe-al-b amorphous base magnetically hard alloy.
- 2. according to claim 1 sm-co-fe-al-b amorphous base magnetically hard alloy preparation method it is characterised in that: made Obtain has the sm-co-fe-al-b amorphous base magnetically hard alloy of special cellular structure under the external magnetic field of 20koe, and its magnetization is strong Spend for 26.1emu/g～86.6emu/g, remanent magnetism is 12.4emu/g～40.6emu/g, coercivity be 1034.6oe～ 19613.0oe.
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