C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 8/22 (2006.01) B23D 61/02 (2006.01) B23D 61/12 (2006.01)
Patent
CA 2226145
The base material consists of a base steel that has a base carbon content of less than 0.3 wt.% and that is carbon-enriched through its surface (2, 3, 4) of two cover faces (2), two leading edge faces (3) and two longitudinal edge faces (4). As a result of a thermochemical treatment of at least one cover face (2), the base steel has edge regions (5) enriched with 0.5 to 1.1 wt.% carbon; with diminishing carbon content the edge regions (5) merge into a region (6) of little or no carbon enrichment. On its edge faces (3, 4) the base material has a sandwich structure created by the carbon-enriched edge region (5) and the non-carbon-enriched region (6).
Le matériau de base est constitué d'un acier de base, dont la teneur de base en carbone est inférieure à 0,3 % en poids, et qui est enrichi en carbone à travers sa surface supérieure (2, 3, 4) qui est formée par deux surfaces de recouvrement (2), deux surfaces d'arêtes d'attaque (3) et deux surfaces d'arêtes longitudinales (4). Suite au traitement thermochimique d'au moins une surface de recouvrement, l'acier de base comporte des zones marginales (5) enrichies en carbone, à raison de 0,5 à 1,1 % en poids, qui se convertissent en une zone (6) non enrichie ou faiblement enrichie en carbone au fur et à mesure que la teneur en carbone diminue. Au niveau des surfaces marginales (3, 4), le matériau de base présente une structure sandwich formée par la zone marginale (5) enrichie en carbone et la zone (6) non enrichie en carbone.
Carl Aug. Picard Gmbh & Co.kg
Dennison Associates
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