Deterring a workpiece, by supplying a partially heated workpiece with a cooling medium, and subjecting deterred area of workpiece to turbulence of gaseous cooling medium, where a cold gas flow of medium is created by eddy-current generator

摘要

The method comprises supplying a partially heated workpiece with a cooling medium, and subjecting a deterred area of the workpiece to a turbulence of a gaseous cooling medium. A cold gas flow of the cooling medium is created by an eddy-current generator such as an eddy-current or a vortex pipe and by a Ranque-Hilsch vortex pipe (7). The workpiece is: deterred within a cold gas chamber standing in fluid connection with the eddy-current generator; hardened by an inductive heating; and surface-hardened or air-hardened after a hot forging process. The method comprises supplying a partially heated workpiece with a cooling medium, and subjecting a deterred area of the workpiece to a turbulence of a gaseous cooling medium. A cold gas flow of the cooling medium is created by an eddy-current generator such as an eddy-current or a vortex pipe and by a Ranque-Hilsch vortex pipe (7). The workpiece is: deterred within a cold gas chamber standing in fluid connection with the eddy-current generator; hardened by an inductive heating; and surface-hardened or air-hardened after a hot forging process. The turbulence is created by a relative motion of tangential aligned nozzles and/or the eddy-current generators and the workpiece. The cooling medium includes a spray mist such as a compressed air-water mixture. An independent claim is included for a device for deterring a workpiece.