A long life cermet coated creping blade

The invention relates to a blade for creping a paper web from a Yankee cylinder surface, said blade comprising a steel substrate having a thickness of 0.7 mm-2 mm, the steel substrate is covered by a cermet coating that forms a working edge adapted for contact with said surface and a web impact area...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KAMPPILA TUULI, MILLWARD CHRIS
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACCESSORIES FOR PAPER-MAKING MACHINES CALENDERS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNERANALOGOUS TO PAPER MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD ORMATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER METALLURGY PAPER-MAKING PERFORMING OPERATIONS PRODUCTION OF CELLULOSE SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TEXTILES TRANSPORTING WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUSTO PAPER
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Beschreibung
Zusammenfassung:	The invention relates to a blade for creping a paper web from a Yankee cylinder surface, said blade comprising a steel substrate having a thickness of 0.7 mm-2 mm, the steel substrate is covered by a cermet coating that forms a working edge adapted for contact with said surface and a web impact area upon which the web impacts during creping, wherein the cermet coating comprises chromium carbides and tungsten carbides in a nickel based metal matrix and wherein the cermet coating has a porosity of < 2 volume % and a hardness of > 1100 HV0.3. 本发明涉及用于使来自杨克滚筒表面的纸幅起皱的刮刀，所述刮刀包括具有0.7mm-2mm厚度的钢基底，该钢基底被金属陶瓷涂层所覆盖，该金属陶瓷涂层形成适于与所述表面接触的工作边缘和所述幅在起皱期间撞击在其上的幅撞击区域，其中所述金属陶瓷涂层包含在基于镍的金属基体中的碳化铬和碳化钨，且其中所述金属陶瓷涂层具有＜2体积％的孔隙率和＞1100 HV0.3的硬度。