초록 ▼

The invention concerns a method for manufacturing steel wire comprising the following steps: manufacturing a reinforcing wire of sizeable length by rolling or hot wire drawing from steel containing the following elements: 0.18% to 0.45 % C, 0.4% to 1.8% Mn, 1% to 4% Cr, 0.1% to 0.6% Si, 0% to 1.5% M

The invention concerns a method for manufacturing steel wire comprising the following steps: manufacturing a reinforcing wire of sizeable length by rolling or hot wire drawing from steel containing the following elements: 0.18% to 0.45 % C, 0.4% to 1.8% Mn, 1% to 4% Cr, 0.1% to 0.6% Si, 0% to 1.5% Mo, 0% to 1.5% Ni, at most 0.01% S and 0.02% P, the reinforcing wire having, after being rolled or hot drawn, a temperature at least higher than the AC3 temperature, preferably by 50 to 200.degree. C. and in particular by 100 to 150.degree. C.; winding the wire in reels before air cooling the raw manufacturing wire to obtain a HRC hardness not less than 40 and preferably higher than 45. In a variant, the method consists in quenching and tempering so that the wire has a hardness between 20 HRC and 35 HRC. The invention also concerns a reinforcing wire and a flexible tube for carrying effluents.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for manufacturing a steel wire intended for use as a reinforcing wire for a flexible tube, characterized in that it comprises the following stages:manufacturing a reinforcing wire of sizeable length by rolling or hot drawing from steel containing the following

[ What is claimed is:] [1.]1. A method for manufacturing a steel wire intended for use as a reinforcing wire for a flexible tube, characterized in that it comprises the following stages:manufacturing a reinforcing wire of sizeable length by rolling or hot drawing from steel containing the following elements:0.18% to 0.45% C,0.4% to 1.8% M,1 to 4% Cr,0.1% to 0.6% Si,0 to 1.5% Mo,0 to 1.5% Ni,at most 0.01% S and at most 0.02% P,the reinforcing wire having, after being rolled or hot drawn, a temperature higher than the AC3 temperature of the steel,winding the wire in reels, andair cooling said wire reel so as to obtain a HRC hardness greater than or equal to 40.