Durch Gas-Wolfram-Lichtbogenschweissen Hergestellte Formverbindung und Herstellungsverfahren dafür

Details

Veröffentlichungs-Nr.

EP4729649

Anmeldetag

28. Mai 2024

Veröffentlichung

16. Januar 2025

Rechtsraum

EP

Abstract

The present invention provides, in the form of a welded joint for high-Mn steel to be used in cryogenic environments, a gas tungsten arc welding technology that can achieve further improvement of the strength of weld metal and enhanced inhibition of formation of hot cracks. Provided is a gas tungsten arc-welded joint of pieces of a steel material produced using a shielding gas and a filler metal. The steel material is austenitic steel with a high Mn content. Chemical composition of the weld material includes, in mass%, C: 0.15 to 0.80%, Si: 0.10 to 1.00%, Mn: 17.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Al: 0.005 to 0.100%, Cr: 0.4 to 5.5%, Mo: 0.01 to 3.50%, Ni: 0.01 to 10.00%, and N: 0.0400 to 0.4000%, with the balance being composed of Fe and unavoidable impurities. Further provided is a production method of a welded joint in which a nitrogen gas is contained in a shielding gas, or a content of N in a filler metal is increased, to form the above-described weld metal.

Anmelder

Firma

JFE Steel Corporation

Land

🇯🇵 Japan