CN86104497A - Magnetic scale device - Google Patents
Magnetic scale device Download PDFInfo
- Publication number
- CN86104497A CN86104497A CN198686104497A CN86104497A CN86104497A CN 86104497 A CN86104497 A CN 86104497A CN 198686104497 A CN198686104497 A CN 198686104497A CN 86104497 A CN86104497 A CN 86104497A CN 86104497 A CN86104497 A CN 86104497A
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- CN
- China
- Prior art keywords
- millimeter
- scale device
- magnetic
- magnetic scale
- alloy
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The improvement dielectric material of the magnetic scale device in a kind of measuring system is chromium 15-40% by percentage by weight, cobalt 5-35%, the potpourri 0.1-5% of titanium, vanadium, zirconium, niobium, molybdenum, tungsten, manganese, nickel, silicon, copper, zinc, germanium and tantalum one of them or they, iron is that the chromium-cobalt-ferrous alloy of residual components is made; And have predetermined coercive force, remanence, hardness, thermal expansivity, Young's modulus of elasticity, scope 5.4 * 10
14-5.1 * 10
9/ millimeter
3Stable particle number and size between the 0.1-10 micron, be decided to be 589/ millimeter
2Or number of impurity particles still less.
Description
The present invention relates to a kind of measuring system that includes magnetic scale device, more specifically relate to the innovative approach of a kind of magnetic medium that uses with described magnetic scale device.
As everyone knows, utilize magnetic scale device to measure the measuring system of length or angle (this system is applicable to numeric display unit), it is characterized in that the high precision measured and applicability in different industrial circles.Recently, the measuring system of magnetic scale device type also is widely adopted in automation field.A kind of measuring system that has the above-mentioned type magnetic scale device includes a magnetic scale device, wherein arranging the module of a plurality of ac magnetizations with prescribed distance, also comprise a mobilizable magnetic head, this magnetic head is in the face of any required one in the module of described a plurality of ac magnetizations.Had above-mentioned measuring system, and though magnetic scale device or magnetic head fixing all can, fixed this, then another is just linked on the movable object.When described movable object was moved, the signal that produces with magnetic head was measured the distance that described movable object moves thus just by electric treatment.
The magnetic medium that uses with above-mentioned magnetic scale device need have magnetic, for example: be higher than the coercive force (Hc) of 300 oersteds, to get rid of the influence of external magnetic field effect; Also to have the remanence (Br) that is higher than 1,000 Gauss, produce more powerful signal.Up to now, a kind ofly satisfy that above-mentioned magnetic requires and magnetic medium with good workability is prepared from by the alloy based on copper, nickel and iron.This alloy material is produced by for example following composition: copper accounts for the weight of 65-75%, and nickel accounts for the weight of 17-30%, and iron accounts for greater than 5% or the weight of higher number percent.
When above-mentioned alloy bore burin-in process under about 600 ℃ temperature, its coercive force increased, and this helps burin-in process cold working afterwards.Therefore, described alloy provides and has been easy to make sheet material or the garden bar of using as magnetic scale device.However, have been found that described alloy still has many drawbacks.
The present invention has found following true with the method for experiment: at first, copper-nickel-ferro alloy as public sector the time, has the structure that contains rich copper nickel and iron nickel with nickel.The copper of obvious described copper-nickel structure partly will be subjected to segregation.Described segregation causes the variation of the population that settled out in this line of segragation, also just can not guarantee uniform magnetic, and cause the precise decreasing of magnetic scale device.As a result, whole described copper-nickel-ferro alloy can not have uniform magnetic.This fact is found with experimental technique by the inventor.So it is extremely important for the magnetic medium of the above-mentioned type to eliminate above-mentioned segregation.
Secondly, copper-nickel-ferro alloy has 13.5 * 10
-6-14.0 * 10
-6/ ℃ thermal expansivity.On the other hand, be the support of the magnetic scale device of fixing above-mentioned copper-nickel-ferro alloy system, usefulness is iron usually, and iron has the thermal expansivity (10.0 * 10 littler than described alloy
-6-11.0 * 10
-6/ ℃).So, when by the magnetic scale device of above-mentioned alloy composition at its two by described retort stand fixedly the time, magnetic scale device can speed to hang down because of temperature variation, or is subjected to tension force, causes the testing tool error thus.
The inventor experimental results show that: with having 13.5 * 10
-6/ ℃ the copper-nickel-ferro alloy of thermal expansivity to prepare a length be one meter, diameter is under 2 millimeters the situation of magnetic scale device, when 10 ℃ variation appears in temperature, described magnetic scale device with have 10.0 * 10
-6Its length difference has 35 microns between the retort stand of/℃ thermal expansivity.
The 3rd, copper-nickel-ferro alloy has for example 13.000-14,000 kilogram/millimeter
2Little Young modulus.Therefore, when above-mentioned magnetic scale device (diameter is 2 millimeters, and length is 1 meter), by above-mentioned copper-nickel-ferro alloy be prepared from and its two ends by retort stand fixedly the time, occur in speeding to hang down and just becoming fairly obvious of magnetic scale device middle part, thus very important.That is to say, on the magnetic head moving direction, the magnetic scale device knockdown.This drawback also causes the testing tool error.
Consider that above-mentioned true the present invention is done, the present invention also is used to provide a kind of magnetic medium of using as magnetic scale device that unlikely causes above-mentioned segregation phenomena, this magnetic medium helps to improve the testing tool error that the testing tool precision And of magnetic scale device can cause the parts thermal expansivity and reduces to minimum, and has high abrasion resistance.
For reaching above purpose, the invention provides a kind of magnetic medium that is used for magnetic scale device, described magnetic medium is prepared from by a kind of alloy based on chromium-cobalt-iron, the composition of this alloy is: the percentage by weight of chromium accounts for 15-40%, the percentage by weight of cobalt accounts for 5-35%, the percentage by weight of the potpourri of titanium, vanadium, zirconium, niobium, molybdenum, tungsten, manganese, nickel, silicon, copper, zinc, germanium and tantalum one of them or they accounts for 0.1-5%, and residue is an iron.
Described magnetic medium has 300-1000 oersted coercivity H, 700-1500 Gauss's remanence Br, the hardness Hv of 350-600,9.5-11.5 * 10
-6/ ℃ thermal expansivity, and 20,000-23,000 kilogram/millimeter
2Young modulus.
The population that has settled out is 5.4 * 10
14/ millimeter
3With 5.1 * 10
9/ millimeter
3Between scope in, the population of intervention is defined as 589/ millimeter
2Or still less.
Above-mentioned alloy of the present invention (constituting a kind of magnetic medium that is used for magnetic scale device) has for example 300-1000 oersted coercivity H and 7,000-15, the good magnetic of 000 Gauss's remanence Br.However, for processed alloy, should note the following fact.If cobalt composition percentage by weight is lower than 5% in the principal ingredient (chromium, cobalt and iron), then remanence Br will reduce; If cobalt composition percentage by weight is higher than 35%, then coercive force reduces too much.If the chromium component percentage by weight surpasses 40%, the remanence Br of described alloy then descends; And if the chromium component percentage by weight drops to and be lower than 15%, the coercivity H of described alloy then reduces too much.
Additive titanium, vanadium, zirconium, niobium, molybdenum, tungsten, manganese, nickel, silicon, copper, zinc, germanium and the tantalum that application is listed above is used for improving the processibility of alloy.However, the molybdenum that adds non-mixed form can make the workability deteriorates of the alloy that makes, so must add the molybdenum that is mixed in above-mentioned other additive.Therefore, the alloy with above-mentioned processing mode preparation has the magnetic (for example: coercive force, magnetic flux density) that is suitable for making magnetic scale device.
Of the present invention have 300-1 with chromium-cobalt-ferrous alloy (resemble the above prepare), 000 oersted coercive force and 7,000-15,000 Gauss's remanence And constitutes the good magnetic medium that uses with magnetic scale device, and the alloy of handling is easy to plastic working and cutting, in this, as the magnetic medium that magnetic scale device is used, this also is desirable.
Be used as the magnetic medium of magnetic scale device, processed alloy will have following characteristic:
(1) thermal expansivity:
As previously mentioned, if magnetic scale device material and support component (at two ends fixed magnetic scale device) material coefficient of thermal expansion coefficient has difference, variation of temperature just may cause magnetic scale device speed hang down, or may on described scale device, apply a unnecessary tension force, cause the testing tool error thus.Conventional copper-nickel-ferro alloy has 13.5 * 10
-6-14.0 * 10
-6/ ℃ thermal expansivity, this thermal expansivity with as the standard industry of support component with 10.0 * 10 of iron
-6-11.0 * 10
-6/ ℃ difference of thermal expansion coefficients very big, cause tangible testing tool error thus.
On the contrary, the chromium-cobalt of the invention described above-ferroalloy has scope 9.0 * 10
-6With 13.5 * 10
-6/ ℃ between thermal expansivity, this chromium-cobalt-ferroalloy of make selecting thermal expansivity just in time drop on described scope becomes possibility.That is to say, might provide a kind of its expansion coefficient and the alloy that expansion coefficient as the iron material of magnetic scale device support adapts, avoided thus because the different caused error of the thermal expansivity of magnetic scale device and retort stand thereof.
In this respect, note along with the treatment conditions after the described alloy fusion, that is, initial or finishing temperature, cooldown rate or aging effect, the thermal expansivity of processed alloy can change.For example, water cooled off 30 minutes from 1,000 ℃ temperature, and processed alloy shows 13.2 * 10
-6/ ℃ thermal expansivity, further be cooled to 500 ℃ and bear last burin-in process again, processed alloy then shows 9.1 * 10
-6/ ℃ thermal expansivity.When per hour to reduce by 13 ℃ speed when 635 ℃ are cooled to 500 ℃, processed alloy has 10.2 * 10
-6/ ℃ thermal expansivity.So, select above-mentioned treatment conditions suitably, might produce a kind of alloy with required thermal expansivity.
(2) stable particle number
The inventor proves with experimental technique, and the population that settles out owing to burin-in process and the appearance of magnetic scale device measuring error are closely related.Illustrated that the record performance of magnetic scale device recording section all can be subjected to deleterious effect no matter the stable particle number that magnetic scale device comprises is too much or very few.This The fact has been fully proved ground shows that the energy value that appears at the magnetic scale device surface changes with the population that has settled out, and this causes measuring error.Now, suppose measuring error be limited to per 1 meter magnetic scale be lower than ± 1.0 microns, in this case, just need be limited to 5.4 * 10 to the population that can settle out
14/ millimeter
3With 5.1 * 10
9/ millimeter
3Between scope in.However, the population that can settle out preferably defines 1.4 * 10
14/ millimeter
3With 6.2 * 10
10Millimeter
3Between scope in.The above chromium-cobalt-ferroalloy has such advantage: because utilize melt the burin-in process of being carried out the back define can be stable population, so might utilize the way of the described burin-in process condition of suitable selection to control described population.
(3) non-metallic impurities population:
The inventor has found the effect of the number of impurity particles non-metal mixture (mainly being oxide) of stable particle coexistence (for example with) amount of flux that also changes, and can reduce the record performance of magnetic scale device recording section, thus, be necessary to reduce as much as possible described number of impurity particles.If the magnetic scale device measuring error is limited less than ± 1.0 microns in per 1 meter described scale, just be necessary number of impurity particles is reduced to less than 589/ millimeter
2, or preferably be reduced to less than 152/ millimeter
2; That is to say, as far as possible described number of impurity particles is decreased to minimum level.In addition, if measuring error is limited less than ± 1.0 microns at per 1 meter magnetic scale, then need playing in the scope that the size that can change the foreign particle of amount of flux effect is reduced to 0.1 micron-10 microns.
As previously mentioned, when constituting a kind of material segregation of magnetic scale, the magnetic property of described material will change, and can cause producing the testing tool error in the segregation part of described magnetic scale device unit.Conventional copper-nickel-ferro alloy is rich copper nickel and iron nickel.The copper part of copper nickel structure often trends towards segregation, thus, also just can not provide a kind of alloy with even magnetic property.
On the contrary, illustrate that chromium-cobalt of the present invention-ferroalloy can be avoided the segregation of any structure through fully careful processing.A kind of for example to have length be 1 meter magnetic scale device if produce, and if need make the testing tool error that causes by segregation in allowed band, then need the segregation degree is reduced in 10 microns.
(4) Young modulus
When a long magnetic scale device is fixed at its two ends, the middle part of scale device just as previously shown be subjected to like that speed to hang down, thus, cause the testing tool error.The described at utmost δ that speeds to hang down can be expressed as:
δ＝Kl/E
Here,
K is a constant
L is the length of magnetic scale device
E is a Young modulus
Can find out that from above formula along with the increase of Young modulus, the maximum sag of speeding can reduce gradually.On the other hand, along with the increase of magnetic scale device length l, also must increase the Young modulus of material.
Chromium-cobalt of the present invention-ferroalloy has 20,000-23,000 kilogram/millimeter
2Young modulus, so meet above-mentioned requirements fully.On the contrary, conventional copper-nickel-ferro alloy has 13,000-14,000 kilogram/millimeter
2So little Young modulus is so can not satisfy above-mentioned requirements fully.
Experiment is found: with of the present invention by percentage by weight 11.5% cobalt, the chromium of percentage by weight 33%, percentage by weight is 0.5% titanium, all the other are the alloy of the present invention that iron is formed, do and grow up 750 millimeters, when the magnetic scale device of 2 millimeters φ of diameter, described magnetic scale device two ends were fixed, the maximum at the described scale device middle part sag δ that speeds was 0.55 millimeter.On the contrary, to by 22% nickel, 8% iron, all the other alloys that are copper (percentage by weight) is formed make conventional magnetic scale device with above-mentioned same size, when the two ends of described conventional magnetic scale device were fixed, the maximum that this magnetic scale device demonstrates at the middle part sag δ that speeds was 1.0mm.
As mentioned above, with regard to coercivity H, remanence Br, processibility, thermal expansivity, segregation and Young modulus, confirmed that magnetic medium of the present invention is suitable for doing magnetic scale device.In addition, the advantage that processed magnetic medium has is, chromium-cobalt-ferrous alloy has the hardness Hv of 350-600, and this level is higher than conventional copper-Ni-Fe base hardness of alloy (240-260); And the magnetic medium that this processing is crossed has the tear resistance that significantly increases, and thus, avoided the magnetic scale device that caused by wearing and tearing and the space between the magnetic head.
Conventional copper-nickel-ferro alloy has 480 ℃ Curie point, and along with the rising of temperature, coercivity H, residual magnetic flux density Br descend.On the contrary, chromium-cobalt of the present invention-ferrous alloy is characterised in that: have and be higher than 650 ℃ Curie point, and (for example: temperature is up to 450 ℃ can not change magnetic, coercivity H, remanence are constant), so, the magnetic scale device that is made of with chromium-cobalt-ferrous alloy the present invention still can keep correct measurement when improving temperature.
Chromium-cobalt of the present invention-ferrous alloy also has such advantage: because population and number of impurity particles that the result of burin-in process can be stable are limited in the preset range, thus the variation of the amount of flux on the magnetic scale device material surface is reduced to minimum level, thereby measuring error is reduced to the degree that practical problems do not occur.
Appended table 1 illustrates the example (wherein the content of principal ingredient is variable) of 6 kinds of chromium-cobalt of the present invention-ferrous alloys, and a kind of with reference to alloy.
Table 1
With reference to above table 1, sample 1-4 represents alloy of the present invention.Sample 5 has the component in the scope of the invention of dropping on, but thermal expansivity drops on outside the described scope.Sample 6 has the component that slightly drops on outside the described scope.Sample 7 or represent conventional copper-Ni-Fe base alloy with reference to alloy.The characteristic of 7 kinds of samples shown in the above table 1 is shown in following property list 1 and the property list 2.
Property list 1
Property list 2
Attention: be exactly that (for example: when titanium) being transformed into another kind of additive, the characteristic of gained alloy does not have marked difference yet, and therefore, it is the same to provide the data that provide with property list 1 and table 2 basically when a kind of additive.
Relation between stable particle number (experiment of being undertaken by a large amount of the present invention is determined) and the measuring accuracy is placed on front property list 3 and illustrates.Pass between number of impurity particles and the measuring accuracy ties up to shown in the property list 4.
Property list 3
Claims (4)
1, a kind of magnetic medium of magnetic scale device, it comprises: a kind ofly account for percentage by weight 15-40% by chromium, cobalt accounts for percentage by weight 5-35%, the potpourri of titanium, vanadium, zirconium, niobium, molybdenum, tungsten, manganese, nickel, silicon, copper, zinc, germanium and tantalum one of them or they accounts for percentage by weight 0.1-5%, other composition is chromium-cobalt-ferrous alloy that iron prepares, described magnetic medium has the coercivity H of 300-1000 oersted, 7000-15000 Gauss's remanence Br, the hardness Hv of 350-600,9.5-11.5 * 10
-6/ ℃ thermal expansivity, 20,000-23,000 kilogram/millimeter
2Young modulus and scope 5.4 * 10
14/ millimeter
3With 5.1 * 10
9/ millimeter
3Within the stable particle number; The number of impurity particles of range of size between 0.1 micron-10 microns is 589/ millimeter
2
According to the magnetic medium of claim 1, it is characterized in that 2, stable particle is counted scope 1.4 * 10
14/ millimeter
3With 6.2 * 10
10/ millimeter
3Between.
3,, it is characterized in that number of impurity particles is 152/ millimeter according to the magnetic medium of claim 1
2Or still less.
According to the magnetic medium of claim 2, it is characterized in that 4, foreign particle is 152/ millimeter
2Or still less.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60147174A JP2681048B2 (en) | 1985-07-04 | 1985-07-04 | Magnetic scale material |
| JP147174/85 | 1985-07-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86104497A true CN86104497A (en) | 1986-12-31 |
Family
ID=15424254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198686104497A Pending CN86104497A (en) | 1985-07-04 | 1986-07-04 | Magnetic scale device |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2681048B2 (en) |
| CN (1) | CN86104497A (en) |
| AU (1) | AU570848B2 (en) |
| DE (1) | DE3622033A1 (en) |
| GB (1) | GB2177420B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285155B (en) * | 2008-05-29 | 2010-06-09 | 天津冶金集团天材科技发展有限公司 | Iron-chromium-cobalt permanent magnetic alloy compounding vanadium and tungsten, and deformation processing technology thereof |
| WO2020056784A1 (en) * | 2018-09-20 | 2020-03-26 | 南通明月电器有限公司 | Magnet-conductive nickel alloy material and production process |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10327082B4 (en) * | 2003-06-13 | 2007-06-21 | Vacuumschmelze Gmbh & Co. Kg | Rotationally symmetrical hollow body made of a deformable permanent magnetic alloy and its use and manufacturing method |
| EP2476506A1 (en) * | 2011-01-14 | 2012-07-18 | Siemens Aktiengesellschaft | Cobalt-based alloy with germanium and soldering method |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1367174A (en) * | 1970-12-28 | 1974-09-18 | Inoue Japax Res | Magnetic-meterials |
| JPS5536059B2 (en) * | 1974-05-02 | 1980-09-18 | ||
| US3982972A (en) * | 1975-03-21 | 1976-09-28 | Hitachi Metals, Ltd. | Semihard magnetic alloy and a process for the production thereof |
| US3989556A (en) * | 1975-03-21 | 1976-11-02 | Hitachi Metals, Ltd. | Semihard magnetic alloy and a process for the production thereof |
| JPS5298613A (en) * | 1976-02-14 | 1977-08-18 | Inoue K | Spenodal dissolvic magnet alloy |
| US4120704A (en) * | 1977-04-21 | 1978-10-17 | The Arnold Engineering Company | Magnetic alloy and processing therefor |
| JPS587702B2 (en) * | 1977-12-27 | 1983-02-10 | 三菱製鋼株式会社 | Fe-Cr-Co magnet alloy |
| FR2415145A1 (en) * | 1978-01-19 | 1979-08-17 | Aimants Ugimag Sa | THERMAL TREATMENT PROCESS OF FE-CO-CR ALLOYS FOR PERMANENT MAGNETS |
| JPS608297B2 (en) * | 1978-06-02 | 1985-03-01 | 株式会社井上ジャパックス研究所 | magnet alloy |
| JPS5822537B2 (en) * | 1978-06-19 | 1983-05-10 | 三菱製鋼株式会社 | Fe↓-Cr↓-Co magnetic alloy |
| US4174983A (en) * | 1978-07-13 | 1979-11-20 | Bell Telephone Laboratories, Incorporated | Fe-Cr-Co magnetic alloy processing |
| CA1130179A (en) * | 1978-07-13 | 1982-08-24 | Western Electric Company, Incorporated | Fe-cr-co permanent magnet alloy and alloy processing |
| JPS5629115A (en) * | 1979-08-17 | 1981-03-23 | Inoue Japax Res Inc | Manufacture for magnetic scale |
| AU6333680A (en) * | 1979-08-24 | 1981-03-19 | Western Electric Co. Inc. | Magnetic alloys containing fe-cr-co |
| WO1981000643A1 (en) * | 1979-08-24 | 1981-03-05 | Western Electric Co | Magnetic alloys containing fe-cr-co |
| JPS57149456A (en) * | 1981-03-10 | 1982-09-16 | Sumitomo Special Metals Co Ltd | Dendritic fe-cr-co magnet alloy |
| JPS58179312A (en) * | 1982-04-15 | 1983-10-20 | Nec Corp | Magnetic scale and its production |
| DE3334369C1 (en) * | 1983-09-23 | 1984-07-12 | Thyssen Edelstahlwerke AG, 4000 Düsseldorf | Permanent magnet alloy |
| GB2163778B (en) * | 1984-08-30 | 1988-11-09 | Sokkisha | Magnetic medium used with magnetic scale |
-
1985
- 1985-07-04 JP JP60147174A patent/JP2681048B2/en not_active Expired - Lifetime
-
1986
- 1986-06-24 AU AU59179/86A patent/AU570848B2/en not_active Ceased
- 1986-06-25 GB GB8615518A patent/GB2177420B/en not_active Expired
- 1986-07-01 DE DE19863622033 patent/DE3622033A1/en active Granted
- 1986-07-04 CN CN198686104497A patent/CN86104497A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285155B (en) * | 2008-05-29 | 2010-06-09 | 天津冶金集团天材科技发展有限公司 | Iron-chromium-cobalt permanent magnetic alloy compounding vanadium and tungsten, and deformation processing technology thereof |
| WO2020056784A1 (en) * | 2018-09-20 | 2020-03-26 | 南通明月电器有限公司 | Magnet-conductive nickel alloy material and production process |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3622033C2 (en) | 1989-10-05 |
| GB2177420A (en) | 1987-01-21 |
| GB2177420B (en) | 1989-07-12 |
| DE3622033A1 (en) | 1987-01-15 |
| AU570848B2 (en) | 1988-03-24 |
| JPS628503A (en) | 1987-01-16 |
| AU5917986A (en) | 1987-01-08 |
| GB8615518D0 (en) | 1986-07-30 |
| JP2681048B2 (en) | 1997-11-19 |
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| RJ01 | Rejection of invention patent application after publication |