| 摘要 |
The present invention concerns a press roll, in particular a centre roll, for a paper/board machine, a method for manufacture of the roll, and a composition of the coating of the roll for difficult corrosion conditions. Onto the frame part (1) of the roll, an adhesion/corrosion-protection layer (2) of a thickness of 150...300 mu m has been applied out of a nickel-chromium alloy by means of the high-velocity flame spraying technique (HVOF), onto the adhesion layer (2) a tight-ceramic layer (3) of a thickness of 50...150 mu m has been applied by means of the high-velocity flame spraying technique, which layer (3) consists of 50...100 % of Al2O3 and of 0... 50 % of TiO2, or, alternatively, of 0...100 % of Al2TiO5, and onto the tight ceramic layer (3) a porous ceramic layer (4) has been applied. <IMAGE> |
