READY-TO-USE METAL WIRE AND METHOD FOR PRODUCING SAME

摘要

PCT No. PCT/FR97/00028 Sec. 371 Date May 3, 1999 Sec. 102(e) Date May 3, 1999 PCT Filed Jan. 8, 1997 PCT Pub. No. WO97/26379 PCT Pub. Date Jul. 24, 1997A ready-to-use metal wire comprising microalloyed steel with a structure almost entirely made up of a cold-hammered annealed martensite is disclosed. The wire diameter is of at least 0.10 mm and at most 0.50 mm, and the ultimate tensile strength of the wire is of at least 2800 MPa. The method of producing said wire comprises deforming a wire rod, performing a hardening heat treatment on the deformed wire and heating it to an annealing temperature to cause the formation of a structure almost entirely made up of annealed martensite. The wire is then cooled and deformed. Assemblies comprising at least one such wire, and wire or assemblies used in particular for reinforcing pneumatic tires, are also disclosed.