PROCESS FOR MANUFACTURING WELDED FERRITIC-AUSTENITIC CRNIMO STEEL STRUCTURES

摘要

1. A method of preparing welded articles, which are intercrystalline-corrosion resistant without subsequent heat treatment, from a ferritic/austenitic Cr-N-Mo steel alloy, consisting in percentage by weight of max. 0.06% C max. 0.80% Si 4.0 to 6.0% Mn 23.5 to 28.0% Cr 3.5 to 5.5% Ni 1.0 to 3.0% Mo 0.35 to 0.60% N remainder Fe and unavoidable impurities, which are welded by means of a ferritic/austenitic additive material, characterized in that for welding purposes a material which differs from the main material and which has : max. 0.06% C max. 1.0% Si 4.0 to 6.5% Mn 23.5 to 28.0% Cr 6.5 to 8.5% Ni 1.0 to 3.0% Mo 0.30 to 0.50% N remainder Fe and unavoidable impurities, is used as an additive material in the form of a wire or strip electrode welded under a shielding gas or with a fluxing agent covering, a filler wire which supplies this compound as a pure welding material, or a sheathed rod electrode of this type.