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HARD CHROMIUM PLATING [2 records]

Record 1 2005-09-14

English

Subject field(s)
  • Printing Machines and Equipment
  • Flexography (Printing)
CONT

The laser-engraved anilox roll, introduced about 20 years ago, consists of a plasma-sprayed ceramic coating(typically chromium oxide) that is ground and honed to a very smooth finish(in the neighborhood of 5 RMS). The ceramic coating is extremely hard, with a micro-hardness of 1150 to 1300 Vickers.(For comparison, the hardness of chrome plating is around 850 to 950 Vickers.) Hardness is widely used as a guide to strength, wear and erosion resistance of a coating. Due to its extreme hardness, it is not possible to engrave these coatings using a knurling tool. The only way to produce cells in this material is to engrave it with a laser.

French

Domaine(s)
  • Équipement (Imprimerie et arts graphiques)
  • Flexographie (Imprimerie)
DEF

Cylindre anilox revêtu de céramique dont les alvéoles sont creusées à l'aide d'une tête de gravure à laser.

OBS

Termes et définition tirés du Vocabulaire de la flexographie de France Brodeur. Reproduction autorisée par l'Institut des communications graphiques du Québec.

Spanish

Save record 1

Record 2 1997-11-20

English

Subject field(s)
  • Electrometallurgy
OBS

hard chromium: Chromium electrodeposited for engineering purposes (such as to increase the wear resistance of sliding metal surfaces) rather than as decorative coating.

French

Domaine(s)
  • Électrométallurgie
DEF

Procédé de chromage électrolytique réalisé dans des conditions bien définies, pour obtenir directement à même le métal de base un dépôt épais et adhérent de chrome, dont les propriétés sont : une très grande dureté superficielle (pouvant atteindre 900 à 1 000 unités Vickers), une grande résistance à l'usure et un très faible coefficient de frottement.

Spanish

Save record 2

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