Method for making steel wires and shaped wires, and use thereof in flexible ducts
US5922149A · kind A · utility
19Cited by
1References
31Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 4, 1997 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Nov 4, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for making steel wires, wherein an elongate shaped wire is produced by rolling or drawing steel consisting of 0.05-0.5% C, 0.4-1.5% Mn, 0-2.5% Cr, 0.1-0.6% Si, 0-1% Mo, no more than 0.25% Ni, and no more than 0.02% S and P, and a first heat treatment is performed on the shaped wire, including at least one step of quenching under predetermined conditions to achieve an HRC hardness of at least 32, a predominately martensitic and bainitic steel structure and a small amount of ferrite. A shaped wire and a flexible tube for conveying an H.sub.2 S-containing effluent are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.