Steel wire for reinforcing elastomer articles with improved adhesion promoting layer
OwnerMartin Bombeke, Paul Dambreinventors
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Abstract
High strength steel wire for use e.g. in tire reinforcement is treated so as to have a cementite free surface region. This can be achieved by electroplating or other coating methods, or be decarburizing the surface. The wire has increased resistance to hydrogen embrittlement and corrosion fatigue. The wire with its ferrous surface region is then covered with a rubber adherent outer layer of e.g. brass.
Claims8
A steel wire for reinforcement of vulcanized elastomers drawn form carbon steel with a carbon content of at least 0.4% and a tensile strength of at least 2000 N/mm.sup.2, the wire having a core of a work-hardened essentially pearlitic microstructure and an outer layer able to adhere to rubber, characterized in that said wire core is provided underneath said outer layer with a continuous surface region which is ferrous and substantially free of cementite and other precipitated phases, the surface region extending throughout for a depth of at least 0.5 .mu.m and further characterized in that the rubber adherent layer is a brass layer.
Dependencies are inferred from the claim text.