Microstructure produced in the welding of steels for wide diameter pipes
DOI:
https://doi.org/10.3989/revmetalm.1998.v34.i6.814Keywords:
HSLA steels, Shielding metal are welding, Heat affected zone, MicrostructureAbstract
This is an evaluation of the microstructure in the heat affected zone (HAZ) of steel weldings used in pipe lines. The welding was made by shielding metal are welding. This is a welding process with multiple run and low heat input, however local brittle zones are present in the HAZ. These are originated by a complex mechanism that is influenced by welding parameters and chemical composition of the steel. The welding sequences that help to eliminate the local brittle zones are studied.
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