SHAPED STEEL WIRE WITH HIGH MECHANICAL PROPERTIES RESISTING HYDROGEN ATTACK Russian patent published in 2014 - IPC C21D8/06 C21D9/52 C22C38/04 C21D1/20 

FIELD: metallurgy.

SUBSTANCE: to ensure required mechanical properties proposed wire is made from steel produced at liquid metal processing that contains the following elements, in wt %: 0,75≤C≤0.95, 0.30≤Mn≤0.85, Cr≤0.4, V≤0.16, Si≤1.40 and preferably >0.15 and not obligatorily not over 0.06 of Al, not over 0.1% of Ni, not over 0.1 of Cu, iron and unavoidable impurities. Said wire is made from hot-rolled 5-30 mm diameter rod and cooled to the room temperature and subjected to thermomechanical processing in two steps: isothermal quenching to get homogeneous perlite microstructure and cold drawing at total reduction of 50-80% to shape it as required. Now, it is subjected to reducing short-term thermal treatment under Acl, preferably, at 410-710°C.

EFFECT: production of shaped wire to be used in flexible pipe for sea oil production.

3 cl, 3 tbl