DE884813C - Process to improve the initial and maximum permeability of cable armoring tapes - Google Patents
Process to improve the initial and maximum permeability of cable armoring tapesInfo
- Publication number
- DE884813C DE884813C DES12451D DES0012451D DE884813C DE 884813 C DE884813 C DE 884813C DE S12451 D DES12451 D DE S12451D DE S0012451 D DES0012451 D DE S0012451D DE 884813 C DE884813 C DE 884813C
- Authority
- DE
- Germany
- Prior art keywords
- initial
- permeability
- improve
- hydrogen
- maximum permeability
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000035699 permeability Effects 0.000 title claims description 21
- 238000000034 method Methods 0.000 title claims description 13
- 238000000137 annealing Methods 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 230000007423 decrease Effects 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Soft Magnetic Materials (AREA)
Description
Verfahren zur Verbesserung der Anfangs- und. Maximalpermeabilität von Kabelarmierungsbändern Magnetische Werkstoffe, die zur Armierung von Fernmeldekabeln Verwendung finden, müssen nach dem Bewickeln des Kabels möglichst hohe Werte der Anfangspermeabilität und der Maximalpermeabilität besitzen. Es genügt nicht, daß diese Größen vor,dem Bewickelndes Kabels, also solange keine Deformation des beispielsweise weichgeglühten magnetischen Werkstoffes stattgefunden hat, 'hohe Werte besitzen, sondern es kommt entscheidend darauf an, daß die mit .dem Aufbringen auf das Kabel verbundene mechanische Beanspruchung nur mit einer möglichst geringen Permeabilitätsabnahme verknüpft ist. Es ist bereits ein Verfahren bekanntgeworden, das zur Herstellung eines Werkstoffes mit hoher Anfangs.permeabilität von einer Eisen-Aluminium-Legierung mit o,5 bis 7 % Aluminium ausgeht und bei welchem der Werkstoff zuerst mit einem Verformungsgrad von mehr als 25 % auf das Fertigmaß kalt verformt und, dann bei einer Temperatur zwischen goound z zoo° C schlußgeglüht wird. Dieses Verfahren soll zu Werten der Anfangspermeabilität führen, die nach dem Aufwickeln 6oo übersteigen. Zur Erklärung dieser überraschend hohen Werte muß darauf hingewiesen werden, daß die Anfangspermeabilität sich nicht durch eine Messung bestimmen läßt, sondern nur durch Extrapolation der Permeabilitätskurve bis zur Feldstärke Null. In neuester Zeit wurde nun festgestellt, däß die Permeabilitätskurve im Bereich ganz niedriger Feldstärken von etwa 2o mOe und weniger auf wese.ntlich niedrigere Werte absinkt als man nach dem Verlauf der Permeabilitätskurve bei etwas höheren Feldstärken erwarten kann. Bestimmt man unter Berücksichtigung dieser neuen Erkenntnis die Werte der Anfangspermeabilität, .die sich durch das bekannte Verfahren erzielen lassen, durch Messungen bei Feldstärken bis herab zu 5 m-0e und noch weniger, so zeigt sich, .daß das bekannte Verfahren nur Anfangspermeabilitäten von ioo bis 150 im günstigsten Falle liefert.Method of improving the initial and. Maximum permeability of cable armoring tapes Magnetic materials used for armoring telecommunication cables Are used, after winding the cable, the highest possible values of Have initial permeability and maximum permeability. It is not enough that these sizes before the winding cable, so as long as no deformation of the example annealed magnetic material has taken place, 'have high values, it is crucial that the with .dem application to the cable associated mechanical stress only with the lowest possible decrease in permeability is linked. There is already a process known that for the production a material with high initial permeability from an iron-aluminum alloy starts with 0.5 to 7% aluminum and in which the material starts with a Degree of deformation of more than 25% to the finished size, cold-formed and then at a temperature between goound z zoo ° C is finally annealed. This procedure is intended lead to values of the initial permeability which exceed 600 after winding. To explain these surprisingly high values it must be pointed out that the initial permeability cannot be determined by a measurement, but only by extrapolating the permeability curve to zero field strength. In Recently it has now been found that the permeability curve is completely in the area lower field strengths of about 20 mOe and less to significantly lower values decreases than one after the course of the permeability curve at slightly higher field strengths can expect. If one determines the values taking into account this new knowledge the initial permeability, which can be achieved by the known method, by measurements at field strengths down to 5 m-0e and even less, it can be seen .that the known method only has initial permeabilities of 100 to 150 in the cheapest Trap supplies.
Es ist ferner bekanntgeworden, daß das Aufbringen des magnetischen Werkstoffes auf das Kabel mit einer nur sehr geringen Abnahme der Maximalpermeabilität verbunden. ist, wenn hierzu Werkstoffe mit Rekristallnsationstextur verwendet werden. Nach der Schlußglühung unter Wasserstoff liegt auch hier die Anfangspermeabilität zwischen ioo und 150.It has also become known that the application of the magnetic Material on the cable with only a very small decrease in maximum permeability tied together. if materials with a recrystallization texture are used for this purpose. After the final annealing under hydrogen, the initial permeability is also here between ioo and 150.
Zur Verbesserung der magnetischen Werte wurde bereits vorgeschlagen, ein kombiniertes Glühverfahren zur Anwendung zu bringen, das in einer Glühung in,reduzierender Atmosphäre von. 900 bis iooo° C und einer anschließenden Glühung in oxydierender Atmosphäre bei 7oo bis iooo° C besteht. Zwischen den beiden Glühungen wird vorzugsweise eine Abkühlung auf unter 400° C eingeschaltet. Durch dieses Verfahren'wird die Anfangspermeabilität nach dem Deformieren gegenüber den bisher bekannten Verfahren etwa verdoppelt. Aber auch die Maximalpermeabilität erfährt noch eine Verbesserung von ungefähr 2o %.In order to improve the magnetic values, it has already been proposed that to bring a combined annealing process to use, which in an annealing in, reducing Atmosphere of. 900 to 100 ° C and a subsequent annealing in oxidizing Atmosphere at 700 to 10000 ° C. Between the two anneals is preferred a cooling to below 400 ° C switched on. This process increases the initial permeability after deforming approximately doubled compared to the previously known method. but the maximum permeability also experiences an improvement of about 20%.
Der Erfindung liegt nun die Aufgabe zugrunde, .dieses zweistufige Verfahren durch eine einzige Glühung zu ersetzen. Dies gelingt erfindungsgemäß dadurch, daß man nur eine Glühung bei 956 bis io5o° C in feuchtem, strömendem Wasserstoff durchfährt und dabei einen Feuchbigkeitsgelialt des Wasserstoffs von mehr als o,o2 g/1 und eine Strömungsgeschwindigkeit von o,i bis i 1 pro Minute und pro Quadratdezimeter Ofenquerschnitt einhält. Besonders bewährt haben sich en Feuchtigkeitsgehalt von mehr als o,2 g/1 und eine Strömungsgeschwindiigkeit von o,2 bis 0,5 1 pro Minute und pro Quadratdezimeter.The object of the invention is to replace this two-stage process with a single annealing. According to the invention, this is achieved by only annealing at 956 to 1050 ° C. in moist, flowing hydrogen, with a moisture content of the hydrogen of more than 0.02 g / 1 and a flow rate of 0.1 to 1.5 per minute and per square decimeter of furnace cross-section. A moisture content of more than 0.2 g / l and a flow rate of 0.2 to 0.5 l per minute and per square decimeter have proven particularly useful.
Die Anfangspermeabilität erreicht durch diese Behandlung Werte von mehr als Zoo. Die Maximalpermeabilität liegt über 4ooo. Das neue Verfahren bringt also in mehrfacher Hinsicht einen Fortschritt. Es vereinfacht ,die .Behandlung und kürzt die Behandlungsdauer ab, wobei gleichzeitig noch eine Verbesserung,der Permeabilitätswerte auftritt.With this treatment, the initial permeability reaches values of more than a zoo. The maximum permeability is over 4,000. The new process brings So in several respects a step forward. It simplifies the .treatment and shortens the duration of the treatment, while at the same time improving the permeability values occurs.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES12451D DE884813C (en) | 1943-01-07 | 1943-01-07 | Process to improve the initial and maximum permeability of cable armoring tapes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES12451D DE884813C (en) | 1943-01-07 | 1943-01-07 | Process to improve the initial and maximum permeability of cable armoring tapes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE884813C true DE884813C (en) | 1953-07-30 |
Family
ID=7473998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES12451D Expired DE884813C (en) | 1943-01-07 | 1943-01-07 | Process to improve the initial and maximum permeability of cable armoring tapes |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE884813C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1122972B (en) * | 1954-10-20 | 1962-02-01 | Siemens Ag | Process for the elimination of the erosion of the iron-silicon sheets to be used for the construction of the iron body of electrical machines and apparatus |
| DE1153045B (en) * | 1957-11-15 | 1963-08-22 | Gen Electric | Process for the simultaneous annealing and decarburization of cold-worked silicon steel |
| DE3119898A1 (en) * | 1981-05-19 | 1982-12-16 | Beru-Werk Albert Ruprecht Gmbh & Co Kg, 7140 Ludwigsburg | Metal core for induction coils, process for manufacturing it, and use thereof |
-
1943
- 1943-01-07 DE DES12451D patent/DE884813C/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1122972B (en) * | 1954-10-20 | 1962-02-01 | Siemens Ag | Process for the elimination of the erosion of the iron-silicon sheets to be used for the construction of the iron body of electrical machines and apparatus |
| DE1153045B (en) * | 1957-11-15 | 1963-08-22 | Gen Electric | Process for the simultaneous annealing and decarburization of cold-worked silicon steel |
| DE3119898A1 (en) * | 1981-05-19 | 1982-12-16 | Beru-Werk Albert Ruprecht Gmbh & Co Kg, 7140 Ludwigsburg | Metal core for induction coils, process for manufacturing it, and use thereof |
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