| 摘要 |
A method for plasma-coating of rolls by forming a ceramic layer on the roll surface with a plasma plume emitted by a plasma spray apparatus, the plasma plume containing a powdered coating material, wherein the coating material is applied to the roll in a plurality of spiral passes of the plume along the roll. The plasma plume emitted by the plasma spray apparatus is limited by a ceramic disc (14) mounted in the path of the plasma plume and having an aperture (15) via which only the hot zone of the plasma plume is transmitted, and wherein the spiral passes of the plume along the roll are delayed by an angle dependent on the number of spiral passes to be applied to the roll, such as to be distributed evenly along the roll. |
