Stahlmaterial und Druckbehälter
Anmelder: Nippon Steel Corporation 🇯🇵
Details
- Veröffentlichungs-Nr.
- EP4793380
- Anmeldetag
- 11. Oktober 2024
- Veröffentlichung
- 17. April 2025
- Rechtsraum
- EP
Abstract
A steel product and a pressure vessel that contains the steel product, having a specific chemical composition having α represented by the formula below of from 5.0 to 16.0, the tensile strength is from 615 MPa to 930 MPa, the microstructure of a portion that is 1/4 of the thickness from the surface includes lower bainite and martensite, the total area ratio of the lower bainite and the martensite is 15.0% or more, the total area ratio of upper bainite, the lower bainite, and the martensite is 90.0% or more, the area ratio of retained austenite is less than 1.7%, and the Mn concentration in a center segregation region in a portion that is 1/2 of the thickness is 2.00% or less. α = 0.50 × √[C] × (1 + 0.64[Si]) × (1 + 4.10[Mn]) × (1 + 0.27[Cu]) × (1 + 0.52[Ni]) × (1 + 2.33[Cr]) × (1 + 3.14[Mo])
Anmelder
- Firma
- Nippon Steel Corporation
- Land
- 🇯🇵 Japan
Japanischer Stahlkonzern mit Sitz in Tokio, einer der größten Stahlhersteller der Welt. Aktiv in der Produktion von Stahl für Automobilbau, Bauwesen und Schiffbau sowie in Werkstoff- und Verfahrenstechnik.
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