CN1163915C - Soft magnetic nickel-iron aloy with low coercive field strength, high permeability and improved resistance to corrosion - Google Patents

Soft magnetic nickel-iron aloy with low coercive field strength, high permeability and improved resistance to corrosion Download PDF

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CN1163915C
CN1163915C CNB998014117A CN99801411A CN1163915C CN 1163915 C CN1163915 C CN 1163915C CN B998014117 A CNB998014117 A CN B998014117A CN 99801411 A CN99801411 A CN 99801411A CN 1163915 C CN1163915 C CN 1163915C
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alloy
weight
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soft magnetism
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H·哈顿多夫
̩
A·科尔伯-泰利普斯
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VDM Metals GmbH
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147Alloys characterised by their composition
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147Alloys characterised by their composition
    • H01F1/14708Fe-Ni based alloys
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00Details of electromagnetic relays
    • H01H50/16Magnetic circuit arrangements

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  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
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  • Soft Magnetic Materials (AREA)
  • Hard Magnetic Materials (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Conductive Materials (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention relates to a soft magnetic nickel-iron alloy containing 35-65 mass % nickel, one or several of the rare earths cerium, lanthanum, praseodymium or neodymium and the impurities introduced during smelting, the sum of the rare earths being between 0.003 and 0.05 mass %.

Description

The soft magnetism Fe-Ni alloy
Technical field
The present invention relates to the soft magnetism Fe-Ni alloy.
Background technology
By " magnetic material and its commercial Application " of Carl Heck, H ü tig publishing house, Heidelberg 1975, the 349 pages or leaves such as grade) book is known, and soft magnetic material is as the material of armature and yoke in relay.
Major requirement to this material is to have high saturation flux density, so that under low energy, obtain high magnetic holding force, has high magnetic permeability, and therefore low magnetic field intensity, that is to say, in air gap, can produce low exciting current and high magnetic flux density, on armature, produce big attraction like this.When exciting current reduced, low coercive field strength can make relay disconnect easily.
Except that magnetic requires, when weather replaces, relay material also had corrosion resistant requirement, because the normal function of relay is essential under every kind of climatic condition.When material does not have enough corrosion resistances, only be by additionally applying finished product, making it have corrosion-resistant finishes to satisfy this requirement.
The contact surface of armature and yoke must have as far as possible little gap, so that the magnetic circuit of being made up of yoke and armature has high magnetic permeability.It can not be subjected to the damage of relay status conversion, because the release current of relay will change.
Also there is similar requirement in other mold pressing and the stamping parts of being made by soft magnetic material.
DIN17405 " soft magnetic material that is used for direct current relay " has described the magnetic requirement of relay material.Following table provides the content of being taken passages by DIN17405.
Table 1: according to the relay material of DIN17405
Material Coercive field strength Minimum magnetic flux The feature of alloy is formed
Be called for short Material number Maximum Hc A/m Under magnetic field intensity H (A/m) Weight %
20 50 100 300 500 4000
RNi24 1.3911 24 0.20 0.45 0.70 0.90 1.00 1.18 36Ni
RNi12 1.3926 12 0.50 0.90 1.10 1.25 1.35 1.45 50Ni
RNi8 1.3927 8 0.50 0.90 1.10 1.25 1.35 1.45 50Ni
RNi5 2.4596 5 0.50 0.65 0.70 0.75 70 to 80Ni. a small amount of Cu, Cr, Mo
RNi2 2.4595 2.5 0.50 0.65 0.70 0.75
Alloy Ni48 (material sequence number 1.3926 and 1.3927) (referring to table 2) as the basic material of RNi12 and RNi8 class has been described among the DIN17745 " nickel and-iron wrought alloy ".Alloy Ni36 (material sequence number 1.3911) is the basic material of RNi24 class.
Table 2: by the content of DIN17745 extracts
Be called for short Material number Form weight %
Alloy composition Admissible tramp material
Ni48 1.3926 1.3927 Ni is minimum 46, Fe49-53 C0.05, Mn0.5, Si0.3
Ni36 1.3911 About 36
When melting of Fe-Ni alloy refined, except that required alloying element, also need deoxidation element and/or sulphur removal element such as manganese, silicon and aluminium.In addition, when adopting conventional steel-smelting technology to prepare this alloy owing to cost is low, unavoidably introduce certain minimum flow, oxygen, sulphur, phosphorus, carbon, calcium, magnesium, chromium, molybdenum, copper and cobalt be mingled with.Therefore, under the steel-smelting technology of routine, melting in arc furnace refined these alloys and subsequently steel ladle metallurgy that is used for deoxidation, sulphur removal and the degassing and/or vacuum oxidizability carbonization treatment.Afterwards, the hot forming in one or two step with steel ingot or continuously cast slab (Stranggussbramme) is 4 millimeters until thickness, subsequently-if desired, comprises that also intermediate annealing-cold forming is to final thickness.As describing among the DE19612556A1, be mingled with carbon, nitrogen, oxygen, sulphur and nonmetal inclusion magnetic property is worsened.By the deoxidation of required melt before the casting and/or remove sulphuring treatment and introduce nonmetal inclusion.According to deoxidation and/or sulfur elimination difference, these are mingled with for example is the oxide of calcium, magnesium and aluminium.
Therefore, in order to overcome these difficulties, up to now, the soft magnetic material that has peak demand in the prior art is to prepare by the basic material that the nothing of selecting is mingled with by means of vacuum technique, as offering some clarification among DE-A 3910147 and the DE-C 1259367.Other by possibility known in the open source literature is, in as DE-A 4105507, describe very expensive, in advance under vacuum or protective gas melting the electro-slag re-melting method of steel ingot.
JP-A 07,166 281 disclose be used for magnetic head, comprise Ni and Fe and be added with the magnetic alloy of Nd, Pr and Sm.Wherein, Ni content surpasses 78 weight %.
Summary of the invention
Task of the present invention is a melting soft magnetism Fe-Ni alloy, and this alloy has the magnetic property that meets above-mentioned requirements, corrosion-resistant and resistance to wear, and has a series of preferred application in soft magnetic components.
This task is by having 35 to 65 weight % nickel and one or more rare earth metal ceriums, lanthanum, praseodymium or neodymium and depending on that the soft magnetism Fe-Ni alloy that is mingled with under the melting condition finishes, wherein the total amount of rare earth metal is 0.003 to 0.05 weight %, and wherein the total amount of rare earth metal cerium, lanthanum, praseodymium or neodymium (weight %) is higher at least 4.4 times than sulfur content (weight %).
Embodiment
The favourable execution mode of theme of the present invention is described and can be described below.
First aspect, the invention provides a kind of soft magnetism Fe-Ni alloy, it has nickel and one or more rare earth metal ceriums, lanthanum, praseodymium, neodymium, the sulphur of the highest 0.004 weight % and being mingled with by the melting introducing of 35 to 65 weight %, wherein, the total amount of rare earth metal is 0.003 to 0.05 weight %, and when representing with weight %, the total content of rare earth metal is 4.4 times of sulfur content at least.
In second aspect, in the soft magnetism Fe-Ni alloy according to first aspect, this alloy comprises the cerium of the highest 0.05 weight %.
In the third aspect, in soft magnetism Fe-Ni alloy according to first aspect, this alloy comprises as deoxidation and/or sulfur-removing additives: the manganese of the highest 0.5 weight %, silicon and the blend of the highest 0.5 weight %, blend is the magnesium of the highest 0.002 weight %, the calcium of the highest 0.002 weight %, the aluminium of the highest 0.010 weight %, the oxygen of the highest 0.004 weight %, and other trace is mingled with under the melting condition.
In fourth aspect, in soft magnetism Fe-Ni alloy according to second aspect, this alloy comprises as deoxidation and/or sulfur-removing additives: the manganese of the highest 0.5 weight %, silicon and the blend of the highest 0.5 weight %, blend is the magnesium of the highest 0.002 weight %, the calcium of the highest 0.002 weight %, the aluminium of the highest 0.010 weight %, the oxygen of the highest 0.004 weight %, and other trace is mingled with under the melting condition.
Aspect the 5th, in according to the soft magnetism Fe-Ni alloy one of aspect first to fourth, alloy comprises the boron that is at most 0.002 weight %.
Aspect the 6th, the invention provides the method for melting according to the soft magnetism Fe-Ni alloy of one of first to the 5th aspect, wherein, this alloy of fusing in the arc furnace that opens wide, handle by steel ladle metallurgy and/or vacuum oxidation and decarbonization subsequently, carry out deoxidation, desulfurization and the degassing.
Aspect the 7th, in according to the method aspect the 6th, in the alloy of fusing, adjust following parameter:
-in linear form, the greatest measure of sulphide inculsion is less than 0.1 or 1.1,
-in the fusing form, the greatest measure of oxide inclusions OA (aluminium oxide) is less than 2.2
Or 3.2 or 4.2
-in linear form, the greatest measure of oxide inclusions OS (silicate) is less than 5.2
Or 6.2 or 7.2,
-in balled form, the greatest measure of oxide inclusions OG is less than 8.2 or 9.2.
In eight aspect, in according to the method aspect the 6th or the 7th, preparing element by this alloy and at 800 to 1150 ℃ down after the annealing, the coercive field strength that this element obtains is lower than 8A/m.
Aspect the 9th, the invention provides purposes according to the soft magnetism Fe-Ni alloy of one of first to the 5th aspect, it is as the relay element material.
Aspect the tenth, the invention provides purposes according to the soft magnetism Fe-Ni alloy of one of first to the 5th aspect, it is as the bonnet of magnet valve and the material of valve body.
In the tenth one side, the invention provides purposes according to the soft magnetism Fe-Ni alloy of one of first to the 5th aspect, it is as the yoke of idle magnet and electromagnet or the material of pole piece or pole shoe or utmost point usefulness silicon steel sheet and armature.
Aspect the 12, the invention provides purposes according to the soft magnetism Fe-Ni alloy of one of first to the 5th aspect, it is as magnetic bobbin core and the rotor of stator and motor and the material of stator of stepping motor.
Aspect the 13, the invention provides purposes according to the soft magnetism Fe-Ni alloy of one of first to the 5th aspect, it is as transducer, location transmitter and the molding of location recipient and the material of stamping parts.
Aspect the 14, the invention provides purposes according to the soft magnetism Fe-Ni alloy of one of first to the 5th aspect, it is as magnetic head and magnetic head shielding material.
Aspect the 15, the invention provides purposes according to the soft magnetism Fe-Ni alloy of one of first to the 5th aspect, it is as shielding material.
Alloy of the present invention is preferably by steel-smelting technology, promptly by fusing in open arc furnace (offenen Lichtbogen), undertaken by steel ladle metallurgy and/or (vacuum oxidation and decarbonization) processing subsequently that deoxidation, sulphur removal and the degassing make.Afterwards, the hot forming in one or two step with steel ingot or continuously cast slab is 4 millimeters until thickness, subsequently-if desired, also adjusts by this band by intermediate annealing-cold forming to final thickness and prepares the required hardness of element.
Preparing element by this alloy and at 800 to 1150 ℃ down after the annealing, the coercive field strength that this element obtains is lower than 8A/m.
The preferred purposes of alloy of the present invention is relay element such as yoke and armature.
In addition, Fe-Ni alloy of the present invention also is suitable for using in below the application:
The bonnet of-magnet valve and valve body
The yoke of-idle magnet and electromagnet or pole piece or pole shoe or the utmost point silicon steel sheet and armature
The rotor of the magnetic bobbin core of-stepping motor and stator and motor and stator
The molding and the stamping parts of-transducer, location transmitter and location recipient
-magnetic head and magnetic head shielding
-shielding, for example motor shielding, the radome of indicating instrument and the shielding of cathode ray tube.
To strike out the plain film sample by the thick 1.2 millimeters band that steel mill's technology makes, clean, under hydrogen, carry out annealing in process, in stove, be cooled to 300 ℃ then with 1080 ℃/4 hours.The weather test of using this sample to carry out describing among the DIN50017: under 55 ℃/90-96% air humidity 8 hours and at 25 ℃, following 16 hours of 95-99% air humidity was carried out this circulation 28 times.The alloy of test is the alloy (referring to table 3) that comprises 36-81 weight % nickel and portions additive such as chromium, copper and/or molybdenum.After the end of anti-alternately climatic test, with nickel content greater than 75% alloy phase ratio, nickel content obviously more serious corrosion phenomenon (B.Gehrmann all occurs smaller or equal to all alloys of 55 weight % on its surface, H.Hattendorf, A.Kolb-Telieps, W.Kramer, W.Mottgen, and do not having the requirement of not satisfying above-mentioned corrosion resistance to relay material under the additional corrosive measure of improvement material and corrosion 48,535-541 (1997)).In contrast, as the coercive field strength Hc explanation shown in the example of passing the imperial examinations at the provincial level at table 3, it satisfies the magnetic property (prior art) that DIN17405 requires.
Table 3
Form weight % Hc A/m Maximum Hc is according to DIN17405
Alloy Fe Ni Mo Cr Cu Mn Si
Fe-36Ni 62.90 36.50 0.01 0.03 0.03 0.27 0.18 4.2 24
Fe-40Ni 58.35 40.75 0.02 0.05 0.04 0.50 0.18 4.7
Fe-41Ni 58.50 40.65 0.01 <0.01 0.04 0.47 0.21 3.2
Fe-45Ni 54.25 44.70 0.02 0.02 0.02 0.58 0.28 2.5
Fe-47Ni-6Cr 45.85 47.30 <0.01 6.04 0.01 0.21 0.26 3.8
Fe-48Ni 51.70 47.50 0.04 0.03 0.02 0.41 0.20 2.4 8
Fe-50Ni 48.85 50.70 0.01 0.04 0.03 0.21 0.05 3.5 8
Fe-55Ni 43.70 55.45 0.06 0.06 0.05 0.42 0.14 12.5
Fe-76Ni-Cr. Cu 16.05 75.95 0.10 2.00 4.96 0.60 0.22 0.87 2.5
Fe-77Ni-Ti. Nb 14.80 77.30 0.01 0.10 4.50 0.49 0.24 2.4 2.5
Fe-77Ni-Mo. Cu 13.85 77.15 3.45 0.10 4.47 0.53 0.33 0.85 2.5
Fe-80Ni-Mo 13.95 80.10 4.75 0.05 0.09 0.50 0.33 0.44 2.5
Fe-81Ni-Mo 12.45 81.50 5.27 0.03 0.05 0.43 0.13 1.23 2.5
After the end of anti-alternately climatic test, find sulphur at the corrosion location of sample by means of REM/EDX.
According to the present invention, the improvement of corrosive nature is astoundingly by adopting cerium that Fe-Ni alloy sulphur removal corrosion-prone, that its nickel content is 35-65 weight % is realized.Therefore, preferably this by chemical property very similarly rare earth metal cerium and/or lanthanum and/or praseodymium and/or the neodymium hybrid metal formed carry out.In order to ensure fixed all sulphur, must there be enough rare earth.If from forming the cerium sulphide CeS that for example has high cerium content, the cerium atom that exists in alloy so comes to this for a long time than sulphur atom.
For by the whole fixed sulphur of cerium, cerium content (weight %) must be 4.4 times of sulfur content (weight %) at least so.To other rare earth lanthanum, praseodymium and/or neodymium with the total content of rare earth metal is required also is same.
As mentioned above, be retained in the material owing to adding the product that strong like this deoxidier and sulfur elimination such as cerium form, thereby influenced magnetic property (A.Hoffmann, " about different deoxidant elements to the distortion of Ni-Fe alloy and the influence of initial permeability ", Z.angew. physics is 32, the 236 to 241 pages).Astoundingly, should add rare earth metal, even the magnetic values of magnetic permeability and coercive field strength is in the conventional fluctuation range according to the furnace charge of prior art melting with such amount.
Known, but go out dexidizing slag from the contact surface explosion of relay, and it is retained in the middle of the contact surface, and has destroyed the contact surface of smart throwing when further connection of relay owing to its high hardness (for example under the situation at oxidation residua).Therefore, according to DIN 50602 (method M), relay material must only have low-down nonmetal inclusion content.Therefore, in the time of when the hybrid metal deoxidation of using cerium or being made up of rare earth metal cerium, lanthanum, praseodymium, neodymium, at linear SS, the greatest measure of sulphide inculsion is less than 0.1 or 1.1; In the fusing form, the greatest measure of oxide inclusions OA (aluminium oxide) is less than 2.2 or 3.2 or 4.2; In wire-form, the greatest measure of oxide inclusions OS (silicate) is less than 5.2 or 6.2 or 7.2, and in balled form, the greatest measure of oxide inclusions OG is less than 8.2 or 9.2.
The Fe-Ni alloy (furnace charge E5407 and E0545) that for example has about 48% nickel and inappreciable manganese and silicon by means of the melting in 30 tons arc furnace of steel mill's technology, and with form very similarly, but the furnace charge (furnace charge T4392, T5405 and T5406) (prior art) that does not add the prior art of rare earth compares.List in the table 4 accurate the composition.
Table 4: charge composition of the prior art (T) and charge composition of the present invention (E),
Unit: weight %.
Element Prior art By composition of the present invention The limit
Feed intake T2536 T5477 T5488 T4392 T4505 T5406 E5407 E0545
Ni 47.45 47.5 47.85 47.7 47.45 47.9 47.65 47.65
Mn 0.40 0.40 0.36 0.38 0.40 0.38 0.39 0.41 Maximum 0.5
Si 0.19 0.19 0.22 0.20 0.14 0.15 0.14 0.22 Maximum 0.3
Al 0.005 0.005 0.007 0.009 0.007 0.008 0.005 0.005 Maximum 0.010
Mg 0.001 0.0003 0.0008 0.0001 0.0001 0.0002 0.0006 0.0008 Maximum 0.002
Ca 0.0004 0.0004 0.0003 0.0001 0.0002 0.0002 0.0003 Maximum 0.002
Ce - - - - - - 0.014 0.011
La - - - - - - 0.008 0.005
Pr - - - - - - 0.001 0.001
Nd - - - - - - 0.003 0.003
The total rare earth (TRE) amount - - - - - - 0.026 0.020 Maximum 0.050
S 0.0020 0.0012 0.0007 0.0012 0.0008 0.0010 0.0010 0.0022 Maximum 0.0040
4.4 *S 0.0044 0.0088
O 0.0020 0.0010 0.0015 0.0020 0.0020 0.0020 0.0025 Maximum 0.0040
N 0.0010 0.0010 0.001 0.0010 0.0010
C 0.011 0.009 0.004 0.013 0.012 0.009 0.007 0.016 Maximum 0.05
P 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.003
Cr 0.03 0.03 0.03 0.04 0.04 0.04 0.05 0.02
Mo 0.05 0.09 0.13 0.10 0.14 0.05 0.04 0.08
Cu 0.06 0.06 0.04 0.10 0.05 0.05 0.05 0.15
Co 0.04 0.02 0.01 0.04 0.02 0.02 0.02 0.03
B - - - 0.001 0.001 0.001 0.001
As furnace charge T4392, T5405, T5406 and furnace charge E5407, add small amount of boron and can improve stampability.The content (weight %) of cerium is more than 4.4 times of sulfur content (weight %) in the furnace charge of the present invention (E5407 and E5405).
After fusing, carry out breaking down, hot rolling subsequently is into about 4 millimeters hot-rolled band, and through the final thickness of cold deformation to 1.0 subsequently millimeter.
In addition, the punching press diameter is 25.5 millimeters a round specimen.Use is until all furnace charges of E0545.Here use about 15 millimeters * 15 millimeters * 5 millimeters foundry goods, finish grind its surface by the founding specimen preparation.Clean all samples, a part of sample carries out annealing in process with 970 ℃/hour under hydrogen, be cooled in stove below 300 ℃ then.The second portion sample under hydrogen to carry out annealing in process in 1030 ℃/2 hours.In stove, be cooled to below 300 ℃ afterwards.All samples are carried out in short-term (2 days) weather test, wherein the temperature/humidity alternate cycles be 3 hours from 25 ℃ and 55% air humidity to 55 ℃ and 98% air humidity.In the glass dish that the single face of sample is placed, the bottom surface is shrouded under the crevice corrosion condition of aggravating like this.The results are shown in Table 5.
Table 5: weather result of the test
Feed intake Behind the weather resistance test that shortens: the sample/confession of the band hot spot piece sample sum of having a try Explanation
970 ℃/6 hours 1030 ℃/2 hours
T5405 10/10 10/10 There are a plurality of tangible points on the two sides of each sample
T5406 10/10 10/10 There are a plurality of tangible points on the two sides of each sample
E5407 0/10 0/10
E0545 0/1
In furnace charge E5407 of the present invention and E0545, do not find corrosion, and in two contrast furnace charge T5405 and T5406, find hot spot on two positions at each sample.
As mentioned above, the adding of strong like this deoxidier and sulfur elimination such as cerium since its product be retained in and influence magnetic property in the material.Astoundingly, the magnetic permeability that furnace charge E5407 of the present invention and E0545 demonstrate and the magnetic values of coercive field strength are in the conventional fluctuation range of the furnace charge that melts according to prior art, and be as shown in table 6.
Table 6: the magnetic values of furnace charge of the prior art (T) and furnace charge of the present invention (E), its under hydrogen with 1080 ℃/4 hours annealing in process with in stove, be cooled to and after 450 ℃, on the sample of 1 millimeters thick, measure.The composition of furnace charge sees Table 4.
Workpiece material Coercive field strength Minimum magnetic permeability, T Statistical value
Be called for short Worker's piece number Hc, A/m When field intensity is H, A/m μ4 The μ maximum
20 50 100 300 500 4000
RNi 24 1.391 1 <24 0.20 0.45 0.70 0.90 100 1.18
RNi 12 1.392 6 <12 0.50 0.90 1.10 1.25 1.35 1.45
RNi 8 1.392 <8 0.50 0.90 1.10 1.25 1.35 1.45
Feed intake
E5407 4.2 1.02 1.12 1.18 1.31 1.50 1.56 10200 97800
E0545 2.6 11690 133770
T2536 1.9 8000 179600
T4392 3.8 1.07 1.16 1.22 1.36 1.44 1.54 5000 154700
T5405 2.5 1.06 1.14 1.20 1.32 1.41 1.57 9200 142100
T5406 2.1 1.06 1.14 1.20 1.33 1.42 1.53 10000 158900
T5477 2.76 1.08 1.17 1.21 1.34 1.42 1.53 8200 135100
T5488 5.21 1.09 1.20 1.35 1.40 1.46 1.54 2600 99850
Second embodiment is that observation has the performance of two kinds of furnace charges of the prior art when breaking down and hot rolling of the composition that provides in the table 7.
The main difference of these two kinds of furnace charges is content differences of rare earth metal.
Table 7
Element The limit
Feed intake T0626 T0624
Ni 36.2 36.45
Mn 0.25 0.26 Maximum 0.5
Si 0.20 0.19 Maximum 0.3
Al 0.009 0.009 Maximum 0.010
Mg 0.0030 0.003 Maximum 0.002
Ca Maximum 0.002
Ce 0.029 0.001
La 0.017
Pr 0.002
Nd 0.006
The total rare earth (TRE) amount 0.054 0.002 Maximum 0.050
S 0.002 0.002 Maximum 0.0040
O 0.0050 0.0020 Maximum 0.0040
N 0.0025 0.0020
C 0.004 0.009 Maximum 0.05
P 0.002 0.002
Cr 0.04 0.01
Mo 0.06 0.06
Cu 0.05 0.09
Co 0.05 0.03
B - -
The rare earth metal total content is that 0.054% furnace charge T0626 produces the crack when hot forming, and rolls ingot afterwards and become waste material.High like this rare earth metal content causes the thermal deformation deterioration.On the contrary, furnace charge T0624 can be rolled into billet and thickness is about 4 millimeters hot-rolled band.Because the chemical property of rare earth metal is similar, so among the present invention the total amount of rare earth metal cerium, lanthanum, praseodymium, neodymium is defined as maximum 0.05 weight %, to avoid the heat processing and forming problem.
Table 8 expression is according to the test of DIN50602 to the nonmetal inclusion content of different furnace charges among prior art (T) and the present invention (E).
Table 8
Material Press the percent purity of DIN 50602: maximum (technology M)
Feed intake SS OA OS OG
The limit 0.1 or 1.1 2.2 or 3.2 or 4.2 5.2 or 6.2 or 7.2 8.2 or 9.2
E5407 Do not survey 2.1 Do not survey 8.0
E0545 The same 2.2 Do not survey 8.1
T4392 The same 2.2 Do not survey 8.0
T5405 The same 2.0 Do not survey 8.0
T5406 The same 2.2 Do not survey 8.0
T5477 The same 2.1 Do not survey 8.1
T5488 The same 2.0 Do not survey 8.0
T2536 The same 2.7 Do not survey Do not survey
The greatest measure of the oxide inclusions of furnace charge T2536 in wire-form is 2.7 (method M).This numerical value is too high when this furnace charge is used as the material of relay element.It will cause the wearing and tearing of relay contact surface, consequently cause the relay function loss.Therefore, the content of following restriction nonmetal inclusion according to the present invention:
According to DIN50602, form among the SS at wire rod, the greatest measure of sulphide inculsion is to be less than or equal to 0.1 or 1.1, according to DIN50602, in the fusing form, the greatest measure of oxide inclusions OA (aluminium oxide) is less than 2.2 or 3.2 or 4.2, according to DIN50602, in wire-form, the greatest measure of oxide inclusions OS (silicate) is less than 5.2 or 6.2 or 7.2, and according to DIN50602, in balled form, the greatest measure of oxide inclusions OG is less than 8.2 or 9.2.All other furnace charges of enumerating in table 8 all satisfy the content condition of nonmetal inclusion.

Claims (15)

1. soft magnetism Fe-Ni alloy, it has the nickel and one or more rare earth metal ceriums, lanthanum, praseodymium, neodymium of 35 to 65 weight %, the sulphur of the highest 0.004 weight % and being mingled with by the melting introducing, wherein, the total amount of rare earth metal is 0.003 to 0.05 weight %, and when representing with weight %, the total content of rare earth metal is 4.4 times of sulfur content at least.
2. the soft magnetism Fe-Ni alloy of claim 1 is characterized in that this alloy comprises the cerium of the highest 0.05 weight %.
3. the soft magnetism Fe-Ni alloy of claim 1, it is characterized in that, this alloy comprises as deoxidation and/or sulfur-removing additives: the manganese of the highest 0.5 weight %, silicon and the blend of the highest 0.5 weight %, blend is the magnesium of the highest 0.002 weight %, the calcium of the highest 0.002 weight %, the aluminium of the highest 0.010 weight %, the oxygen of the highest 0.004 weight %, and other trace is mingled with under the melting condition.
4. the soft magnetism Fe-Ni alloy of claim 2, it is characterized in that, this alloy comprises as deoxidation and/or sulfur-removing additives: the manganese of the highest 0.5 weight %, silicon and the blend of the highest 0.5 weight %, blend is the magnesium of the highest 0.002 weight %, the calcium of the highest 0.002 weight %, the aluminium of the highest 0.010 weight %, the oxygen of the highest 0.004 weight %, and other trace is mingled with under the melting condition.
5. the soft magnetism Fe-Ni alloy of one of claim 1 to 4 is characterized in that, alloy comprises the boron that is at most 0.002 weight %.
6. the method for the soft magnetism Fe-Ni alloy of one of melting claim 1 to 5 is characterized in that, this alloy of fusing in the arc furnace that opens wide is handled by steel ladle metallurgy and/or vacuum oxidation and decarbonization subsequently, carries out deoxidation, desulfurization and the degassing.
7. the method for claim 6 is characterized in that, adjusts following parameter in the alloy of fusing:
-in linear form, the greatest measure of sulphide inculsion is less than 1.1,
-in the fusing form, the greatest measure of oxide inclusions OA aluminium oxide is less than 4.2,
-in linear form, the greatest measure of oxide inclusions OS silicate is less than 7.2,
-in balled form, the greatest measure of oxide inclusions OG is less than 9.2.
8. claim 6 or 7 method is characterized in that, are being prepared element by this alloy and at 800 to 1150 ℃ down after the annealing, the coercive field strength that this element obtains is lower than 8A/m.
9. the purposes of the soft magnetism Fe-Ni alloy of one of claim 1 to 5, it is as the relay element material.
10. the purposes of the soft magnetism Fe-Ni alloy of one of claim 1 to 5, it is as the bonnet of magnet valve and the material of valve body.
11. the purposes of the soft magnetism Fe-Ni alloy of one of claim 1 to 5, it is as the yoke of idle magnet and electromagnet or the material of pole piece or pole shoe or utmost point usefulness silicon steel sheet and armature.
12. the purposes of the soft magnetism Fe-Ni alloy of one of claim 1 to 5, it is as magnetic bobbin core and the rotor of stator and motor and the material of stator of stepping motor.
13. the purposes of the soft magnetism Fe-Ni alloy of one of claim 1 to 5, it is as transducer, location transmitter and the molding of location recipient and the material of stamping parts.
14. the purposes of the soft magnetism Fe-Ni alloy of one of claim 1 to 5, it is as magnetic head and magnetic head shielding material.
15. the purposes of the soft magnetism Fe-Ni alloy of one of claim 1 to 5, it is as shielding material.
CNB998014117A 1998-01-30 1999-01-08 Soft magnetic nickel-iron aloy with low coercive field strength, high permeability and improved resistance to corrosion Expired - Lifetime CN1163915C (en)

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