DE908624C - Process for improving the magnetic and mechanical properties of transformer and dynamo sheets made of silicon steel - Google Patents

Process for improving the magnetic and mechanical properties of transformer and dynamo sheets made of silicon steel

Info

Publication number
DE908624C
DE908624C DEM4320D DEM0004320D DE908624C DE 908624 C DE908624 C DE 908624C DE M4320 D DEM4320 D DE M4320D DE M0004320 D DEM0004320 D DE M0004320D DE 908624 C DE908624 C DE 908624C
Authority
DE
Germany
Prior art keywords
transformer
silicon steel
improving
mechanical properties
magnetic
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
Application number
DEM4320D
Other languages
German (de)
Inventor
Dr-Ing Gerhard Naeser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MANNESMANN HUETTENWERKE AG
Original Assignee
MANNESMANN HUETTENWERKE AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DEM4322D external-priority patent/DE900700C/en
Application filed by MANNESMANN HUETTENWERKE AG filed Critical MANNESMANN HUETTENWERKE AG
Priority to DEM4320D priority Critical patent/DE908624C/en
Application granted granted Critical
Publication of DE908624C publication Critical patent/DE908624C/en
Expired legal-status Critical Current

Links

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
    • C21D8/1205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular fabrication or treatment of ingot or slab
    • 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
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1222—Hot rolling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Soft Magnetic Materials (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)

Description

Verfahren zur Verbesserung der magnetischen und mechanischen Eigenschaften von Transformatoren- und Dynamoblechen aus Siliziumstahl Die Erfindung betrifft eine weitere Ausbildung des Verfahrens zur Herstellung von Transformatoren- und Dynamoblechen aus Siliziumstahl nach Patent 900 7oo, bei dem eine Glühbehandlung bei etwa i ioo° C mindestens dreimal mit jedesmaliger anschließender Warmverformung von mindestens 3o 1/o erfolgt.Process for improving magnetic and mechanical properties of transformer and dynamo sheets made of silicon steel The invention relates to a further development of the process for the manufacture of transformers and Dynamo sheets made of silicon steel according to patent 900,7oo, in which an annealing treatment at about 100 ° C at least three times with subsequent hot deformation each time of at least 3o 1 / o takes place.

Durch eingehende Versuche wurde festgestellt, daß man ,den nach dem Patent 900 700 erzielten technischen Effekt noch dadurch wesentlich verbessern kann, daß man bereits die Gußblöcke einer mehrstündigen Glühung (3 bis 20 Stunden) bei Temperaturen von iooo bis 125o° C unterwirft. Ein so geglühter Block läßt sich nicht nur leichter zu Platinen verwalzen, da die Härte des Werkstoffes bei Walztemperaturen durch die vorgenommene Glühbehandlung um 5o bis 6o1/9 niedriger ist, sondern die fertigen Bleche weisen gegenüber den entsprechend den Angaben des Patents 900 7oo hergestellten Blechen auch einen noch geringeren Wattverlust auf. Die Verbesserung betrug bei den durchgeführten Versuchen durchschnittlich o,i bis o,i5 Watt/kg bei ioooo Gauß und 5o Perioden. Auf der anderen Seite bietet das verbesserte Verfahren die Möglichkeit, mindestens ebenso hochwertige Transformatoren- und Dynamobleche bei weniger Zwischenglühungen während der Verwalzung der Platinen zu erhalten.Thorough experiments have shown that the technical effect achieved in accordance with patent 900 700 can be significantly improved by already subjecting the cast ingots to annealing for several hours (3 to 20 hours) at temperatures of 10,000 to 1250 ° C. A block annealed in this way is not only easier to roll into blanks, since the hardness of the material at rolling temperatures is 50 to 6o1 / 9 lower due to the annealing treatment carried out, but the finished sheets also have the same characteristics as those made in accordance with the specifications of patent 900,7oo an even lower watt loss. The improvement in the tests carried out averaged 0.1 to 0.15 watts / kg with 10000 Gauss and 50 periods. On the other hand, the improved process offers the possibility of obtaining transformer and dynamo sheets of at least the same quality with fewer intermediate anneals during the rolling of the blanks.

Claims (1)

PATENTANSPRUCH: Verfahren zur Verbesserung der magnetischen und mechanischen Eigenschaften von Transformatoren- und Dynamoblechen aus Siliziumstahl nach Patent 900 700 unter Anwendung einer mindestens dreimaligen Glühbehandlung bei etwa iioo° C mit jedesmaliger anschließender Warmverformung von mindestens >IM, dadurch gekennzeichnet, daß bereits der Gußblock nach seiner Erwärmung auf iooo'° C noch einer mindestens 3stündigen Glühung bei iooo bis 125o° C unterworfen wird.PATENT CLAIM: Process for improving the magnetic and mechanical properties of transformer and dynamo sheets made of silicon steel according to patent 900 700 using at least three annealing treatments at about 100 ° C with subsequent hot deformation of at least > IM, characterized in that the cast block is already after its Heating to 100 ° C is subjected to annealing for at least 3 hours at 100 to 125 ° C.
DEM4320D 1938-01-05 1938-01-16 Process for improving the magnetic and mechanical properties of transformer and dynamo sheets made of silicon steel Expired DE908624C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM4320D DE908624C (en) 1938-01-05 1938-01-16 Process for improving the magnetic and mechanical properties of transformer and dynamo sheets made of silicon steel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEM4322D DE900700C (en) 1938-01-05 1938-01-05 Process for improving the magnetic and mechanical properties of transformer and dynamo sheets
DEM4320D DE908624C (en) 1938-01-05 1938-01-16 Process for improving the magnetic and mechanical properties of transformer and dynamo sheets made of silicon steel

Publications (1)

Publication Number Publication Date
DE908624C true DE908624C (en) 1954-04-08

Family

ID=7292622

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM4320D Expired DE908624C (en) 1938-01-05 1938-01-16 Process for improving the magnetic and mechanical properties of transformer and dynamo sheets made of silicon steel

Country Status (1)

Country Link
DE (1) DE908624C (en)

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