METALLIC MATERIAL AS A SOLID SOLUTION HAVING A BODY-CENTERED CUBIC (BCC) STRUCTURE, AN ORIENTATION OF CRYSTAL AXIS <001> OF WHICH IS CONTROLLED, AND METHOD OF MANUFACTURING THE SAME
a solid solution and structure technology, applied in the direction of metal rolling arrangement, inorganic material magnetism, heat treatment furnaces, etc., can solve the problems of difficult control of the orientation of the axis of easy magnetization, no method for manufacturing non-oriented electrical steel sheets, etc., to achieve excellent magnetic properties, small core loss, and large magnetic flux
Inactive Publication Date: 2012-12-13
NAT UNIV CORP YOKOHAMA NAT UNIV
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Benefits of technology
"The present invention relates to a method for manufacturing metallic material with a body-centered cubic (BCC) structure that has improved magnetic properties. The method involves hot uniaxial compression process to arrange the crystal axis along the work surface of manufacturing process. This method allows for the distribution of crystal axis without heat treatment after manufacturing process, resulting in a metallic material with excellent magnetic properties. The technical effect of the invention is the control of crystal axis orientation in a metallic material, which enhances magnetic performance and reduces core loss."
Problems solved by technology
The usual uniaxial compression process has a problem that not only crystal plane {100} arranging crystal axis having excellent magnetic property in parallel to the surface of the steel sheet, but also crystal plane {111} unable to arrange crystal axis in the surface of the steel sheet exist together.
Usually, it is difficult to control orientation of axis of easy magnetization by not only the uniaxial compression process but also other method of manufacturing.
Thus, there was no method for manufacturing non-oriented electrical steel sheet which has excellent magnetic property with large magnetic flux density and small core loss by controlling the axis of easy magnetization in parallel to the surface of steel sheet.
Method used
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Embodiment Construction
[0066]Embodiments of an electrical steel sheet and a method for manufacturing the steel sheet according to the present invention will be described as following.
[0067]When a metallic material is deformed in high temperatures, various mechanisms contribute to its deformation. In a metallic material, usually, deformation by movement of dislocation is a basic mechanism.
[0068]One of phenomena affecting mainly the movement of dislocation is a dragging of a solute atmosphere generated in a solid solution alloy under combination of a certain temperature range and a strain rate. The phenomenon is that the dislocation surrounded by the solute atoms moves together with the solute atoms. For example, in Fe-Si alloy, Si as the solute atom forms the solute atom atmosphere existing at higher density than an average density in overall crystal around the dislocation. In a certain range of deforming condition, the dislocation can not break away from the solute atom atmosphere and move with dragging t...
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Abstract
An orientation of crystal axis <001> of the metallic material as a solid solution having a structure of body-centered cubic (BCC) is arranged along a work surface of the metallic material by hot rolling process in a temperature range of structuring the metallic material to be BCC single phase solid solution. For example, Fe-Si alloy as the metallic material is heated in the temperature range for BCC single phase solid solution, and processed so as to arrange the orientation of crystal axis <001> along the work surface by pressing the BCC single phase solid solution in a strain rate to maintain work condition for controlling motion of dislocation by atmosphere of solute atom generated in BCC single solid solution and migrating grain boundary by strain energy stored in a crystal grain as driving force.
Description
[0001]Metallic Material as A Solid Solution having a body-centered cubic (BCC) structure, an orientation of crystal axis <001> of which is controlled, and Method of Manufacturing the Same.TECHNICAL FIELD[0002]This invention relates to a metallic material as a solid solution having a body-centered cubic (BCC) structure, an orientation of crystal axis <001> of which is controlled in a plane, and a method of manufacturing the material, for example an electromagnetic material used for an iron core of an electric device, and the method of manufacturing the material.BACKGROUND ART[0003]An electrical steel sheet used widely in electric devices is an example of a material which can perform large effect of technical features by aligning crystal axis of a metal. For example, when a direction of magnetic field as a transformer shown in FIG. 3 is fixed, a grain-oriented electrical steel sheet, in which crystal axis is controlled, is used. Preferably, magnetic lines of force shown wi...
Claims
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IPC IPC(8): C21D8/00
CPCB21B3/02C21D7/13C21D8/12C22C38/06C21D2201/05C22C38/004C22C38/02C21D8/1222C21D8/1205H01F1/16
Inventor FUKUTOMI, HIROSHIOKAYASU, KAZUTOONUKI, YUSUKE
Owner NAT UNIV CORP YOKOHAMA NAT UNIV