|
| Abstract No.: |
|
Scheduled at:
|
Wednesday, May 04, 2022, Hall G1 3:00 PM
HVOF / HVAF Spraying I
|
|
| Title: |
High end hard metal coatings for the toughest demand in paper industry
|
|
| Authors: |
Hasso Christian Jungklaus* / Voith Paper Rolls GmbH + Co. KG, Austria
Andreas Blutmager / Voith Austria, Österreich
|
|
| Abstract: |
Raising demands in industry lead to the request of different and better paper quality. New paper types like e.g. liquid food packaing (lfp) will replace former solutions like Tetrapak, magazine papers will be produced much cheaper on different machine designs. Since certain paper properties like roughness, printability,… still remain or step up in quality level.
One machine component influencing the paper properties strongly is the calender with its extremly hard, coated roll surfaces. The hard metal coating on the calender rolls can determine the later paper quality significantly.
The current work describes investigations on certain WC based HVOF coatings, which later on will be in contact with the paper under high temperatures, extremely high load and steam environment. Coating design from carbide particle size, metal matrix and other factors like apparent density and sintering grade were studied under real life influences. The various coating versions were compared in a slurry test using the same fines as added in the paper production process for increasing brightness and tear strength. Interesting results are discussed on technical, but also economical basis.
|
|