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- W87307324 abstract "The paper treats studies of TIG gas-shielded arc welding using pure nitrogen, N 2 + 5-20 % Ar gas mixtures and N 2 + 2-10 % H 2 gas mixtures. A weld root shielding was provided by nitrogen gas. Welding in N 2 requires by 40 % lower welding current than welding in argon. The study showed that porosity was an issue due to overalloying of N 2 in the weld pool; it can, however, be avoided with adequate welding parameters, particularly sufficiently high welding speed and controlled low heat input. The microstructure of all-weld metal is fully austenitic (γ). Hydrogen reduces nitrogen solubility in the weld pool and produces an austenitic-ferritic (γ+δ) microstructure. Titanium increases nitrogen solubility in the weld pool and strongly reacts with nitrogen. Consequently, there is a high fraction of TiN inclusions in the weld metal." @default.
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- W87307324 date "2011-02-28" @default.
- W87307324 modified "2023-10-01" @default.
- W87307324 title "Automatic TIG welding of austenitic stainless steels in nitrogen and nitrogen-based gas mixtures" @default.
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- W87307324 doi "https://doi.org/10.3989/revmetalmadrid.0962" @default.
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