Method and apparatus of marking a hot steel slab

Details Method and apparatus of marking a hot steel slab Method and apparatus of marking a hot steel slab

B - Operations, Transporting

41

F

101/1

B41F 17/00 (2006.01)

Patent

CA 1228502

"METHOD AND APPARATUS OF MARKING A HOT STEEL SLAB" ABSTRACT OF THE DISCLOSURE A method of applying a visible mark on a hot steel slab is described. The adherence of the marking composition to the slab surface can be improved by removing locally iron oxide therefrom, followed by the step of locally cooling down the surface to prevent secondary oxide growth. This is done by first directing a water jet of high pressure at an acute angle to the slab surface immediately followed by a gentle water stream of low pressure. After this conditioning of the surface, the mark can be sprayed thereon.

486610

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