Nippon Steel Corporation

Tohru Iuchi

Shigehiro Yamaguchi

Tadashi Ichiyama

Katsuro Kuroki

Kunitoshi Watanabe

Yozo Suga

Atsushi Kawasaki

Fumio Tanaka

Jiro Ohno

Hirokatsu Yashiro

Motoharu Nakamura

Yoshihiro Ohya

Yasuo Tokita

Toshihiko Shibata

Yukio Nakamori

Hisanori Karasima

Seiichhiro Murashima

Tetsuro Kawamura

Yoh-ichi Nagatake

Clinical thermometer

The decarburization reaction which occurs in the production of an electrical steel sheet is quantitatively detected by passing an electromagnetic wave beam into the vicinity of the sheet, which is positioned in an annealing furnace, and then measuring the absorption amount of the electromagnetic wave beam, which is absorbed by water vapor in the vicinity of the steel sheet and/or by CO gas formed due to the reaction between the water vapor and the steel sheet.

Method for quantitatively detecting the decarburization reaction in the

An interferometric contact-free measuring method for sensing, by a laser beam, motional surface deformation of a workpiece subject to an ultrasonic vibration, comprising splitting the laser beam into a measuring beam incident upon a measuring point on the workpiece and a reference beam incident upon a reference point close to the measuring point, and bringing the two beams, after reflection, into a common optical detector.

Interferometric contact-free measuring method for sensing motional

For the iron cores of an electrical machinery and apparatuses, such as transformers, electric motors and generators, mostly a grain-oriented electromagnetic steel sheet is used. Since the grain-oriented electromagnetic steel sheet has a (110) [001]texture and is thus easily magnetized in the rolling direction, the direction of magnetic flux in the iron cores is required to be coincident with the rolling direction. However, this requirement cannot be completely fulfilled due to the shape and an operation efficiency of producing the iron cores as well as generation of a magnetic reluctance in the butted iron-core elements. Laser irradiation regions are formed, according to the present invention, for example, on the following: the parts of the iron core where the rotational magnetic field is generated; the entire surface of the I-type elements or: the major part of the E or C type element. As a result of the laser-irradiation, the watt loss is low even where the complete coincidence of the easy direction of magnetization and the magnetic flux direction is difficult.

Iron core for electrical machinery and apparatus as well as method for

In a method of producing a grain-oriented electromagnetic steel sheet, a laser beam is irradiated onto the steel sheet, which has been subjected to a final high temperature annealing in order to approximate the crystal orientation of the sheet in a (110) [001] orientation. Because of the laser beam irradiation, regions of high dislocation density are locally formed in the steel sheet and subdivide the magnetic domains, with the result that a low watt loss is achieved.

Grain-oriented electromagnetic steel sheet with improved watt loss

When a steel sheet or the like is heated in a furnace to a temperature somewhat higher than the room temperature and is still or moved, its temperature can be measured by detecting the radiant energy therefrom. The measurement is normally difficult due to the influence of background noise of radiant energy from the surroundings, change of the transmittance factor of the environment or atmosphere for radiant energy, and change of the emissivity of the object to be measured. In order to remove such causes of errors and to correctly measure the temperature by detecting radiant energy, a radiometer and a black body radiator are disposed symmetrically and specularly with respect to the normal to a surface of an object to be measured, and two different amounts of radiant energies are emitted from the black body radiator, and the emissivity of the object to be measured is determined from the detected values from the radiometer, the two temperature values of the black body radiator, and the diffusely reflecting factor associated with the object to be measured, whereby correct measurement of the surface temperature of the object to be measured can be done. Embodiments for implementing this method are proposed.

Method of and an apparatus for measuring surface temperature and

A surface temperature measuring apparatus is arranged to comprise means for conducting a first radiant energy generated from an object to be measured, said energy conducting means being provided opposite to said object, and reference radiation source means provided to mask the influence of radiation noise from the furnace on a radiometer and to generate a second radiation whose level is substantially determinable, whereby the surface temperature of said object can be determined from the detected values of said first and second radiations.

Surface temperature measuring apparatus for object within furnace

A process of providing electromagnetic steel strips or sheet with excellent magnetic properties. The process comprises the steps of:

Method for treating an electromagnetic steel sheet and an

In a method of producing a grain-oriented electromagnetic steel sheet, a laser beam is irradiated onto the steel sheet, which has been subjected to a final high temperature annealing in order to approximate the crystal orientation of the sheet in a (110), [001] orientation. Because of the laser beam irradiation, regions of high dislocation density are locally formed in the steel sheet and subdivide the magnetic domains, with the result that a low watt loss is achieved.

A black body furnace and a radiation thermometer are spaced from each other in the direction of the surface of a heated material the temperature and emissivity of which is to be measured so as to be in a specular, or mirror-like, symmetry to a line normal to the heated material and the wavelength band of the detector of the radiation thermometer is selected such that the surface of the material shows specular, or mirror-like, reflection characteristics. The radiation energy emitted from the black body furnace is changed and the outputs of the radiation thermometer responding to the change are processed whereby the emissivity and surface temperature of the material are obtained. The use of this invention makes it possible to measure accurately the temperature of the material without any disturbance, even if the emissivity of the material is changed in the course of the measurement.

Method and an apparatus for simultaneous measurement of both temperature

A method and an apparatus for measuring a heated material in an industrial furnace by the use of a radiation thermometer comprising providing a sliding means at the tip portion of the radiation thermometer, changing a distance between the heated material and the shielding means to determine background radiation rate of the energy reflected or emitted from the atmosphere of the furnace. The background radiation rate is determined by the output energy of the radiation thermometer, which together with an accurate temperature of the heated material and an ambient temperature of the furnace, are used to calculate a temperature error at arbitrary distances. Setting the shielding means of the radiation thermometer in a position at which the temperature error is within a tolerable range, and measuring the heated material with use of the radiation thermometer.

Growing community of inventors

Kawasaki, Japan

Tohru Iuchi