Roll of winding equipment in rolling factory

Details Roll of winding equipment in rolling factory Roll of winding equipment in rolling factory

B - Operations, Transporting

21

B

B21B 27/00 (2006.01) C23C 4/02 (2006.01) C23C 4/06 (2006.01) B21B 39/00 (2006.01)

Patent

CA 2203923

A ground hardening built-up layer is formed on the surface of a trunk portion of a roll, and a frame sprayed layer of a carbide particle-dispersed type self- meltable and hardenable alloy (any one of Ni-based alloy, Co-based alloy and Fe-based alloy) of not less than 0.5 mm in thickness containing 3-60 wt.% of carbides, such as WC, WmCn, Cr3C2, NbC, VC, MoC, TiC and SiC or not less than one kind of primary particles of carbide, and particles melt-pulverized, sinter-pulverized, granulated and coated by or with not less than one kind of binder metal, or particles of complex carbide, having the form of granules or flakes with carbide particle sizes of 3 to 300 µm, and fused in a certain case is formed on this built-up layer, whereby the roll renders it possible to display high abrasion resistance, passed plate material transferability and plate-damaging resistance, maintain a required level of performance for a long period of time, improve the equipment operating efficiency, reduce the repair expense, and improve the quality of the product taken up.

On forme une première couche de durcissement à la surface d'un tronc de cylindre et, sur celle-ci, une deuxième couche pulvérisée d'un alliage auto-fusible et durcissable du type à particules de carbure dispersées (à base de Ni, Co ou Fe) d'au moins 0,5 mm d'épaisseur et contenant 3 à 60 % en poids de carbures tels que WC, W¿m?C¿n?, Cr¿3?C¿2?, NbC, VC, MoC, TiC et SiC, ou contenant au moins un type de particules primaires de carbure et des particules pulvérisées après fusion ou frittage, granulées et revêtues avec au moins un type de métal liant, ou des particules de carbure complexe, prenant la forme de granulés ou de flocons, d'une taille de 3 à 300µm, et faisant dans un cas précis l'objet d'une fusion. Ce cylindre présente une résistance élevée à l'abrasion et aux dégâts dus aux feuillards, assure un bon transfert des feuillards et des résultats conformes sur une période prolongée, améliore le rendement de l'installation, réduit les frais de réparation et améliore la qualité du produit enroulé.

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