Hochleistungsuniformität von Unterwasserrohrleitungsstahl und Herstellungsverfahren dafür

Details

Veröffentlichungs-Nr.

EP4756061

Anmeldetag

30. Juli 2024

Veröffentlichung

6. Februar 2025

Rechtsraum

EP

Abstract

A high-performance-uniformity subsea pipeline steel and a manufacturing method therefor. The chemical components of the high-performance-uniformity subsea pipeline steel comprise, in percent by weight: C: 0.02-0.06%, Si: 0.10-0.30%, Mn: 1.20-1.65%, Cu ≤ 0.30%, Ni ≤ 0.30%, Cr: 0.15-0.30%, Mo ≤ 0.15%, Nb: 0.03-0.05%, V ≤ 0.05%, Ti: 0.008-0.020%, Ca: 0.0012-0.0030%, and Al: 0.015-0.045%, with the balance comprising Fe and inevitable impurities, where it is required to control impurity elements P ≤ 0.01%, S ≤ 0.001%, B ≤ 0.0004%, N ≤ 0.005%, O ≤ 0.0025% and H ≤ 0.0002%. The manufacturing method uses an austenite recrystallization zone and non-recrystallization zone two-stage controlled rolling technology, spread ratio control, and controlled cooling, such that in addition to high performance, obtained subsea pipeline steel also has good performance uniformity.

Anmelder

Firma

BAOSHAN IRON & STEEL CO., LTD.

Land

🇨🇳 China