Hochfestes Nahtloses Rohr und Herstellungsverfahren dafür

Details

Veröffentlichungs-Nr.

EP4748963

Anmeldetag

26. September 2024

Veröffentlichung

3. April 2025

Rechtsraum

EP

Abstract

The present disclosure provides a high-strength seamless tube, comprising, in addition to Fe and inevitable impurities, the following chemical elements in percentage by mass: C: 0.14-0.20%, Si: 0.15-0.55%, Mn: 0.5-1.3%, Cr: 0.5-1.0%, Mo: 0.35-0.85%, V: 0.06-0.1%, Nb: 0.02-0.06%, Ti: 0.01-0.05%, B: 0.001-0.005%, Al: 0.01-0.05%, Ca: 0.0005-0.005%. The present disclosure also provides a method for manufacturing the seamless tube, comprising the following steps performed in sequence: smelting and continuous casting; heating, perforating, rolling, and sizing; heat treatment: austenitizing at a temperature of 900-930°C with a holding time of 30-60 min, quenching, and then tempering at a temperature of 580-650°C with a holding time of 50-80 min; and hot sizing and straightening.

Anmelder

Firma

BAOSHAN IRON & STEEL CO., LTD.

Land

🇨🇳 China