Schweissverbindung und Druckbehälter
Anmelder: Nippon Steel Corporation 🇯🇵
Details
- Veröffentlichungs-Nr.
- EP4800135
- Anmeldetag
- 11. Oktober 2024
- Veröffentlichung
- 1. Mai 2025
- Rechtsraum
- EP
Abstract
A welded joint, in which a base metal has a specific chemical composition having α represented by the following formula of 5.0 to 16.0, a tensile strength of 615 MPa to 930 MPa, and a microstructure of a portion that is 1/4 of the thickness from the surface having a total area ratio of lower bainite and martensite of 15.0% or more, a total area ratio of upper bainite, the lower bainite, and the martensite of 90.0% or more, and an area ratio of retained austenite of less than 1.7%, and in which an effective crystal grain size in a region between a fusion line of a welded portion and a position 1 mm away from the fusion line in a heat-affected zone is 100.0 µm or less; and a pressure vessel comprising the welded joint. 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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