Cold-rolled narrow strip in the form of flat wire or profiled elements made of a high-strength steel
AssigneeC.D. Waelzholz GmbH
InventorsHans-Toni Junius, Heino Buddenberg, Norbert Brachthaeuser, Dirk Wilmes
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Abstract
A flat wire or a narrow strip has a profiled cross-section and is composed of a high-strength steel having the following composition (in weight-%): C 0.2-0.9%, Mn 12-25%, Si up to 0.5%, Al 0.5-2.0%, Cr 1.8-3.5%, S max. 0.005%, P max. 0.06%, N max. 0.1%, Mo max. 1.5%, B max. 0.01%, Ni max. 2.0%, Cu max. 2.0%, Ca max. 0.015%, Nb 0.02-0.35% and/or V 0.02-0.35%, and, as the remainder, iron and unavoidable, production-related contaminants. The wire or strip is cold-rolled and/or cold-profiled from wire-form precursor material, and has improved Rp0.2, Rm, and A80 mechanical values.
Claims26
Flat wire or narrow strip having a profiled cross-section, composed of a high-strength steel having the following composition (in weight percent):
- C 0.2-0.9%,
- Mn 12-25%,
- Si 0.2-0.5%,
- Al 0.5-2.0%,
- Cr 1.8-3.5%,
- S max. 0.005%,
- P max. 0.06%,
- N max. 0.1%,
- Mo max. 1.5%,
- B max. 0.01%,
- Ni max. 2.0%,
- Cu max. 2.0%,
- Ca max. 0.015%,
- Nb 0.02-0.35% and/or V 0.02-0.35%, in each instance,
- and, as the remainder, iron and unavoidable, production-related contaminants, cold-rolled and/or cold-profiled from wire-form precursor material, with optionally at least one intermediate annealing and/or an optional final annealing treatment, to achieve the following mechanical values:
- Rp0.2 1000-1500 MPa,
- Rm 1100-1800 MPa,
- A80 5-25%,
- for the production of armoring plies in flexible pipes for conveying petroleum and natural gas, as well as for transport of liquefied natural gas (FLNG) under acid gas conditions.
Flat wire or narrow strip having a profiled cross-section, composed of a high-strength steel having the following composition (in weight percent):
- C 0.2-0.9%,
- Mn 12-25%,
- Si 0.2-0.5%,
- Al 0.5-2.0%,
- Cr 1.8-3.5%,
- S max. 0.005%,
- P max. 0.06%,
- N max. 0.1%,
- Mo max. 1.5%,
- B max. 0.01%,
- Ni max. 2.0%,
- Cu max. 2.0%,
- Ca max. 0.015%,
- Nb 0.02-0.35% and/or V 0.02-0.35%, in each instance,
- and, as the remainder, iron and unavoidable, production-related contaminants, cold-rolled and/or cold-profiled from wire-form precursor material, with optionally at least one intermediate annealing and/or an optional final annealing treatment, to achieve the following mechanical values:
- Rp0.2 500-1650 MPa,
- Rm 1100-1700 MPa,
- A80 3-50%,
- for the production of armoring plies in flexible pipes for conveying petroleum and natural gas, as well as for transport of liquefied natural gas (FLNG) under acid gas conditions.
Flat wire or narrow strip having a profiled cross-section, composed of a high-strength steel having the following composition (in weight percent):
- C 0.2-0.9%,
- Mn 12-25%,
- Si 0.2-0.5%,
- Al 0.5-2.0%,
- Cr 1.8-3.5%,
- S max. 0.005%,
- P max. 0.06%,
- N max. 0.1%,
- Mo max. 1.5%,
- B max. 0.01%,
- Ni max. 2.0%,
- Cu max. 2.0%,
- Ca max. 0.015%,
- Nb 0.02-0.35% and/or V 0.02-0.35%, in each instance,
- and, as the remainder, iron and unavoidable, production-related contaminants, cold-rolled and/or cold-profiled from wire-form precursor material, with optionally at least one intermediate annealing and/or an optional final annealing treatment, to achieve the following mechanical values:
- Rp0.2 500-1650 MPa,
- Rm 750-1800 MPa,
- A80 6-25%,
- for the production of armoring plies in flexible pipes for conveying petroleum and natural gas, as well as for transport of liquefied natural gas (FLNG) under acid gas conditions.
Dependencies are inferred from the claim text.