Steel wire with high drawability having a carbon level by mass of between 0.05% inclusive and 0.4% exclusive
View Patent ↗The steel wire of diameter d expressed in mm has a completely ferritic, pearlitic or ferritic-pearlitic microstructure and a weight content of carbon C such that 0.05%≤C<0.4%, a weight content of chromium Cr such that Cr<12% and a maximum tensile strength R, expressed in MPa, such that R≥175+930.C−600.In(d) and R≥1500 MPa.
1. A steel wire of diameter d expressed in mm and having a completely ferritic, pearlitic or ferritic-pearlitic microstructure, wherein the wire has a weight content of carbon C such that 0.05%≤C<0.4%, a weight content of chromium Cr such that Cr<12% and a maximum tensile strength R, expressed in MPa and satisfying the following two conditions:
i) R≥175+930*C−600*ln(d), and
ii) R≥1500 MPa.
2. The wire according to claim 1 , having a weight content of carbon C such that 0.07%≤C≤0.3%.
3. The wire according to claim 1 , R≥350+930*C−600*ln(d).
4. The wire according to claim 1 , wherein d is greater than or equal to 0.10 mm.
5. The wire according to claim 1 , wherein d is less than or equal to 0.40 mm.
6. The wire according to claim 5 , wherein d>0.15 mm and R≥1800 MPa.
7. The wire according to claim 1 , wherein d≤0.15 mm and R≥2000 MPa.
8. A cord comprising several wires according to claim 1 .
9. A semi-finished element comprising a rubber matrix in which at least one wire according to claim 1 is embedded.
10. A tire comprising at least one wire according to claim 1 .
11. The wire according to claim 1 , having a weight content of carbon C such that 0.15%≤C≤0.25%.
12. The wire according to claim 1 , wherein R≥700+930*C−600*ln(d).
13. The wire according to claim 1 , wherein d is greater than or equal to 0.12 mm.
14. The wire according to claim 1 , wherein d≤0.15 mm and R≥2100 MPa.