Schweissverbindung und Druckbehälter
Anmelder: Nippon Steel Corporation 🇯🇵
Details
- Veröffentlichungs-Nr.
- EP4793383
- Anmeldetag
- 11. Oktober 2024
- Veröffentlichung
- 17. April 2025
- Rechtsraum
- EP
Abstract
A welded joint having a specific chemical composition having Ceq represented by the following Formula (1) of from 0.350 to 0.490, the tensile strength of from 490 MPa to 720 MPa, the inclusion having a circle-equivalent diameter from 0.01 µm to 0.50 µm, and containing Ti and N, has the number density of 1.0 × 10<sup>5</sup>/mm<sup>2</sup> or more, at a portion that is 1/4 of a thickness and at a portion that is 1/2 of a thickness, in the thickness direction from the surface, the inclusion containing Ti and N has an average grain diameter of 150 nm or less, at the 1/4 portion and the 1/2 portion, and an effective crystal grain diameter in a region between a fusion line of the welded portion and a position 1 mm away from the fusion line in a heat-affected zone is 100.0 µm or less. A pressure vessel containing the welded joint. Ceq=C+Mn/6+Ni/15+Cu/15+Cr/5+Mo/5+V/5
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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