초록 ▼

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, includi

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.

대표청구항 ▼

[ We claim:] [1.] A process for the production of a steel wire that is suitable for use as a reinforcement wire of a hose, characterized in that it comprises the following stages:an elongated shaping wire is produced by rolling or drawing from a steel that contains the following elements:from 0.05%

[ We claim:] [1.] A process for the production of a steel wire that is suitable for use as a reinforcement wire of a hose, characterized in that it comprises the following stages:an elongated shaping wire is produced by rolling or drawing from a steel that contains the following elements:from 0.05% to 0.8% of C,from 0.4% to 1.5%of Mn,from 0 to 2.5% of Cr,from 0.1% to 0.6% of Si,from 0 to 1% of Mo,at most 0.50% of Ni,at most 0.02% of S and P,at least one thermal treatment that comprises at least one quenching operation of the shaping wire is carried out under conditions that are defined to obtain an HRC hardness of greater than or equal to 32, and a steel structure of said wire that is at least 90% martensite-bainite, with said wire having a breaking point R.sub.m which does not exceed 1600 MPa after the thermal treatment, wherein said quenching comprises passing said wire through an austenitizing furnace at a temperature that is greater than point AC3 of the steel.