초록

Heat-treatment device which includes a cooling unit comprising delivery nozzles which deliver at least one coolant, characterized in that it furthermore comprises a shielding element designed so as to maintain a gaseous shielding atmosphere around at least part of the delivery nozzles.

대표청구항 ▼

[ We claim:] [1.] In a process for the heat treatment of a material, which comprises:spraying at least part of a surface of the material with at least one jet containing at least one hot carrier gas to obtain a heat-treated material; andcooling at least part of the heat-treated material;the improvem

[ We claim:] [1.] In a process for the heat treatment of a material, which comprises:spraying at least part of a surface of the material with at least one jet containing at least one hot carrier gas to obtain a heat-treated material; andcooling at least part of the heat-treated material;the improvement wherein the cooling is carried out by:providing at least one delivery nozzle which delivers a coolant; said at least one delivery nozzle being at least partially surrounded by at least one sleeve having an open and free distal end; andmaintaining at least part of the delivery nozzle under a gaseous shielding atmosphere by flushing said nozzle with at least one gaseous shielding stream, said gaseous shielding stream circulating between the delivery nozzle and the surrounding sleeve, thereby preventing the delivery nozzle from icing by ambient moisture entering the sleeve at said open and free distal end and depositing on said nozzle delivering coolant, while excess gaseous shielding stream contained in the sleeve is removed via said open and free distal end.