摘要:
Technology scanning and irradiating grain-oriented electrical steel sheet moving in a rolling direction at a speed V1 with an elliptical spot formed by a laser beam in the width direction at Vc to improve the core loss of the grain-oriented electrical steel sheet, which adjusts the angle ¸s formed by the scan direction of the elliptical beam and the long axis of the ellipse based on the equation ¸s=tan -1 (Vl/Vc) and which constructs the system for adjusting the ¸s by an optical system for laser irradiation comprised of a cylindrical lens telescope, scan mirror, and f¸ lens arranged in that order, a system for changing the angle of the cylindrical lens telescope with respect to the scan direction of the scan mirror, and a system for changing the distance between lenses.
摘要:
Systems and methods for ablating or processing a surface using a laser beam are provided. A method includes directing a laser beam at a surface to form a contact area. The method also includes moving the contact area to form a contact curve. The method includes tuning a wavelength and a power of the laser beam to process a material and/or ablate a coating. The wavelength and the power may be further tuned to not damage the surface beneath the coating. Moving the contact area may include forming a second contact curve by superimposing, at a same time, the second contact curve on the contact curve. A system includes a laser and a directing arrangement configured to direct a laser beam from the laser at a surface to form a contact area. A non-transitory processor-readable medium having instructions stored thereon is provided.
摘要:
Die vorliegende Erfindung betrifft eine Vorrichtung sowie ein Verfahren zur generativen Herstellung von Bauteilen durch Abscheiden von Materiallagen durch schichtweises Verbinden von Pulverpartikeln untereinander und/oder mit einem bereits erzeugten Halbzeug oder Substrat durch selektive Wechselwirkung der Pulverpartikel mit einem hochenergetischen Strahl, wobei zur Glättung einer quer zu den abgeschiedenen Materiallagen verlaufenden Oberfläche des herzustellenden Bauteils zwischen dem Abscheiden von zwei Lagen des Bauteils der vollständige Randbereich der zuletzt aufgebrachten Lage, der entlang einer Oberfläche des herzustellenden Bauteils verläuft, in einer Wirkrichtung, die einen Wirkrichtungsanteil parallel zur Aufbaurichtung der Lagen aufweist, mittels Lasererschütterungsverdichtung oder Ultraschalleinwirkungsbehandlung verdichtet wird und/oder mindestens ein Randbereich (19) zu einer Oberfläche des Bauteils (3') in einer Wirkrichtung, die einen Wirkrichtungsanteil parallel zur Normalen der Oberfläche aufweist, mittels Lasererschütterungsverdichtung oder Ultraschalleinwirkungsbehandlung verdichtet wird.
摘要:
A producing method of a grain-oriented electrical steel sheet includes forming a preferentially-deformable portion at an end region of a steel sheet so as to be parallel with the rolling direction of the steel sheet; coiling the steel sheet; and performing a final annealing to the steel sheet after disposing the steel sheet in a manner such that the end region becomes the lower side of the steel sheet.
摘要:
The invention relates to a multi-track laser beam process of surface hardening of steel sheet with low-carbon and low manganese steel. The resulting steel shows improved mechanical strength and can be used for manufacturing of automotive components. The process comprises the steps of: providing CRCA steel grades of ( low carbon and low manganese) in the form of flat sheet having a chemical composition range by weight percentage, C: 0.03-0.07, Mn: 0.15-0.25 and 1.4, S: 0.005-0.009, P: 0.009-0.014, Si: 0.005-0.02, Al: 0.04, V: 0.001, Nb: 0.001,and Ti:0.002; optimizing laser processing variables to reach austenizing temperature capable for phase transformation of the initial microstructure to harder dual phase structure of the steel sheet; selecting a laser track pattern for surface hardening of the steel sheet; applying the selected laser processing variables in the form of laser power (2.5-3.5 KW) - and scanning speed (150-250 mm/s) combinations on the surface of the steel sheet; selecting and adapting associated laser optics to operate the laser beam such that an impingement laser spot size on the sheet is of square shape, wherein a 6-axis robot employed to carry the laser through a fiber fixed on 6 th axis enabling an movement of the laser beam under the specimen along the axis of the square beam controlling the surface temperature of the specimen to eliminate any possibility of melting the sheet based on on-line surface temperature effect and comparing with pre-stored data representing surface temperature effect; and periodically reviewing the development of desired microstructure of the sample, including measuring hardness level and fraction of different phases.