CN1056015A - The prescription of Cd rare-earth permanent-magnet alloy and manufacture method thereof - Google Patents
The prescription of Cd rare-earth permanent-magnet alloy and manufacture method thereof Download PDFInfo
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- CN1056015A CN1056015A CN 90105095 CN90105095A CN1056015A CN 1056015 A CN1056015 A CN 1056015A CN 90105095 CN90105095 CN 90105095 CN 90105095 A CN90105095 A CN 90105095A CN 1056015 A CN1056015 A CN 1056015A
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Abstract
The invention belongs to the prescription and the manufacture method thereof of RE permanent magnetic alloy and manufacture method thereof, particularly a kind of Cd rare-earth permanent-magnet alloy.The present invention is characterized in RE permanent magnetic alloy, to add cadmium element, become the cadmium rare earth permanent magnet, can enlarge the scope of sintering temperature and aging temp.The product that the present invention is obtained has good processability, has improved corrosion resistance, the characteristics that coercive force is high, and have energy-conservation, the advantage that cost is low.
Description
The invention belongs to RE permanent magnetic alloy and manufacture method, particularly a kind of Cd rare-earth permanent-magnet alloy (being called for short the CNM magnet) prescription and manufacture method thereof.
RE permanent magnetic alloy is come out at present, and world's total productive capacity reaches more than 1000 tons, has entered industrial applications.But in application, there is corrosion-resistant, because the sintered rare earth permanent magnet alloy body is a ceramagnet, body is hard and crisp, be difficult for the machining shape complex component, thereby limited its range of application, because behind the RE permanent magnetic alloy body die mould, sintering temperature (1050 ℃～1150 ℃) and aging temp (500 ℃～700 ℃) are higher, power consumption is big in addition.In order to address the above problem, mainly take in magnet surface nickel plating aspect its anticorrosive property improving, apply epoxy resin, methods such as ion plating or chemical deposition coating, these method technologies are complicated, the cost height.Add binding agent improving to adopt aspect the processing characteristics, as rubber, plastics, the method for materials such as epoxy resin, said method can improve processing characteristics, but exists magnetic property lower than sintered magnet, the shortcoming of heat resistance difference.
In view of this, the object of the present invention is to provide a kind of Cd rare-earth permanent-magnet alloy that overcomes above-mentioned prior art deficiency, the present invention has good processability, the characteristics corrosion-resistant, that sintering temperature and aging temp are low are a kind of magnetic property height, cost is low, easily processing, energy-conservation new rare-earth permanent magnetic material.
Task of the present invention realizes with following technical scheme: the composition of Cd rare-earth permanent-magnet alloy is Nd
αB
βCd
γ(FeM)
100-alpha-beta-γ, wherein α, β, γ are that each element atom percentage content M is the interpolation element, Fe accounts for surplus; Wherein, the Nd element in the Cd rare-earth permanent-magnet alloy
At least a whole or part that can be in following each element replaces, and these elements are: P γ, Sm, La, Ce, MM, Sc, Y, or Gd, Dy, Ho, Eu, Er, Tb, Yb, Tm, Lu; Or the oxide of these nine kinds of elements; The maximum replacement amount of above-mentioned substituted element is that the percentage of Nd content is as shown in table 1, and wherein the B element can be at least a whole in following each element or institute generation partly, and these elements are: C, Si, P, N, Ce, F, O, adding element M is at least a or its compound of following column element, these elements are Co, Ni, Cr, Mn, V, Ti, Zr, Hf, Nb, Mo, W, Tc, Ta, Re, Ru, Rb, Pd Pt, Zn, Cu, Bi, Sn, Sb, Ge, Pb, AL, Ga.The maximum addition of above-mentioned interpolation element is that the percentage of Fe content is shown in chart 2.Key character of the present invention is to increase cadmium element, becomes Cd rare-earth permanent-magnet alloy Nd
αB
βCd
γ(FeM)
100-alpha-beta-γWherein each element atom percentage content is 10≤α≤22; 1≤β≤20; 0.1≤γ≤20, Fe accounts for surplus, and M is for adding element; with above-mentioned each component element in vaccum sensitive stove; melting under the argon shield, the alloy solution after the melting is cast in the copper mold, after its ingot casting is crushed to 3-5 μ m granularity; greater than 12KOe, pressure is 0.8～1.2T/cm in magnetic field intensity
2Carry out pre-profiling technology under the condition,, impose 2-5T/cm in order to improve density
2Wait static pressure.Alloy sintering after the moulding carries out in the vacuum diffusion furnace; its process conditions are: be 700 ℃ of-1150 ℃ of sintering 1 hour in temperature under argon shield; chilling behind the sintering; carry out temperature again and be one or more levels Ageing Treatment 1-10 hour of 300 ℃-650 ℃, finish the back chilling and but or under atmosphere be cooled to room temperature.In addition, Nd
αB
βCd
γ(FeM)
100-alpha-beta-γAll elements can be a simple substance, and alloy or compound form add, and can add when melting, also can add when powder process.Sintering range in the technical process of the present invention and aging range be greater than the usually sintering temperature of Nd based permanent magnetic material and the scope of aging temp,
Its sintering temperature is 700 ℃-1150 ℃, and aging temp is 300 ℃-650 ℃.
The present invention becomes Cd rare-earth permanent-magnet alloy, thereby has increased the toughness of magnet material, and then improved the processing characteristics of magnet owing to add cadmium element, has also improved the corrosion resistance of magnet simultaneously.Feature of the present invention is that the exist form of cadmium element in alloy is the crux factor of decision alloy property, do not enter Nd with cadmium element
2Fe
14The B principal phase has the coercitive effect of raising and be distributed in, if in a single day the Cd element enters Nd when form between the crystal boundary exists
2Fe
14The B principal phase, coercive force (iHC) will decrease, and this kind situation imposes and adds Al, Ga, Dy or Dy
2O
3Suppress the reduction of iHC Deng the measure of element, thereby improved the magnetic property of magnet.Again because sintering range of the present invention and aging range greater than the sintering temperature and the aging range of Nd based permanent magnetic material usually, thereby have obvious energy-saving effect.
Specify formation of the present invention and effect thereof by the following examples.
Embodiment 1, and each element is pressed the Nd that atomic percent is formed
12B
7Cd
5Fe
76Use the magnesia crucible in vaccum sensitive stove, melting under argon shield is cast in melted alloy solution in the copper mold, its ingot casting is pulverized to be 3-5 μ m powder again, and greater than 12KOe, pressure is 0.8-1.2T/cm in magnetic field intensity in pre-profiling
2Carry out under the condition, impose 2-5T/cm again in order to improve density
2Pressure waits static pressure.Alloy sintering carries out in the vacuum diffusion furnace, and 700 ℃ of-1150 ℃ of sintering of temperature 1 hour, chilling behind the sintering was implemented temperature and be 300 ℃ of-650 ℃ of Ageing Treatment after 1 hour then, is cooled to room temperature under the atmosphere under the argon shield, and the gained magnetic property sees Table 3.
Comparative example 1 is pressed the Nd that atomic percent is formed with each element
15B
8Fe
77See Table 3 by embodiment 1 identical process gained magnet magnetic property.
Embodiment 2, each element pressed the Nd of atomic percent group
12.3B
5.7CO
15.3Fe uses the magnesia crucible in vaccum sensitive stove; melting under argon shield; melted alloy solution is cast in the copper mold; again ingot casting is crushed to 3-5 μ m powder; be that the Cd of 5-10 μ m mixes with the granularity of 5At% then; mix the back by identical process moulding, the sintering of implementing 1, process conditions such as Ageing Treatment are handled, and gained magnet magnetic property sees Table 3.
Comparative example 2 is pressed the Nd that atomic percent is formed with each element
15B
7Co
16Fe
62Press example 1 same process and handle, gained magnet magnetic property sees Table 3.
Embodiment 3, each group element in the table 3 is pressed the alloy that atomic percent is formed, press the identical process melting of embodiment 1, pulverize die mould, sintering, magnet behind the sintering carries out 300 ℃-650 ℃ 2-4 level Ageing Treatment, be chilled to more than 100 ℃ after 1～5 hour, atmosphere is cooled to room temperature, and gained magnet magnetic property sees Table 3.
Claims (3)
1, the prescription of Cd rare-earth permanent-magnet alloy and manufacture method thereof, the composition of Cd rare-earth permanent-magnet alloy are Nd
αB
βCd
γ(FeM)
100-2-β-γWherein α, β, γ are that each element atom percentage content M is the interpolation element, and Fe accounts for surplus; Wherein the Nd element in the Cd rare-earth permanent-magnet alloy can be at least a whole in following each element or partly replaces, and these elements are: Py, Sm, La, Ce, MM, Sc, Y, or Gd, Dy, Ho, Eu, Er, Tb, Yb, Tm, Lu; Or the oxide of these nine kinds of elements;
Wherein the B element can be at least a whole in following each element or institute generation partly, and these elements are: C, Si, P, N, Ce, F, O; Adding element M is at least a or its compound of following column element, and these elements are Co, Ni, Cr, Mny, Ti, Zr, Hf, Nb, Mo, W, Tc, Ta, Re, Ru, Rb, Pd, Pt, Zn, Cu, Bi, Sn, Sb, Ge, Pb, AL, Ga.
It is characterized in that increasing cadmium element, Cd rare-earth permanent-magnet alloy Nd
αB
βCd
γ(FeM)
100-2-β-γ, wherein each element atom percentage content is 10≤α≤22,1≤β≤20,0.1≤γ≤20.
2, the prescription of Cd rare-earth permanent-magnet alloy according to claim 1 and manufacture method thereof, it is characterized in that sintering range in the technical process and aging range are greater than the sintering temperature of Nd based permanent magnetic material and the scope of aging temp usually, its sintering temperature is 700 ℃-1150 ℃, and aging temp is 300 ℃-650 ℃.
3, according to the prescription and the manufacture method of claim 1,2 described Cd rare-earth permanent-magnet alloys, it is characterized in that Nd
αB
βCd
γ(FeM)
100-alpha-beta-γ, all elements can be a simple substance, the form of alloy or compound adds, and can add when melting, also can add when powder process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90105095 CN1056015A (en) | 1990-04-25 | 1990-04-25 | The prescription of Cd rare-earth permanent-magnet alloy and manufacture method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90105095 CN1056015A (en) | 1990-04-25 | 1990-04-25 | The prescription of Cd rare-earth permanent-magnet alloy and manufacture method thereof |
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| CN1056015A true CN1056015A (en) | 1991-11-06 |
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| CN 90105095 Pending CN1056015A (en) | 1990-04-25 | 1990-04-25 | The prescription of Cd rare-earth permanent-magnet alloy and manufacture method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105913991A (en) * | 2016-06-27 | 2016-08-31 | 无锡新大力电机有限公司 | Heat-resistant rare earth permanent magnet material for motor |
-
1990
- 1990-04-25 CN CN 90105095 patent/CN1056015A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105913991A (en) * | 2016-06-27 | 2016-08-31 | 无锡新大力电机有限公司 | Heat-resistant rare earth permanent magnet material for motor |
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