Abstract
The structure and texture of low-carbon low-alloy pipe steel after Thermo-Mechanical Controlled Processing (TMCP) and subsequent isothermal quenching were studied by the method of Electron Backscatter Diffraction (EBSD) analysis. The texture, obtained after TMCP, was formed mainly by two strong scattered orientations from {112}<110> and two weaker scattered orientations from {110}<223> and one weak orientation (001)[110]. Complex multicomponent textures were observed after heat treatment. The regions with “ferrite” and martensitic structures were identified and analyzed using Oxford Instruments HKL software. Orientations, constituting textures for both selected areas types, are associated with the basic orientations of the initial deformed austenite grains, formed during the hot deformation by orientation relationships (OR), transitory between Kurdjumov-Sachs OR and Nishiyami-Wasserman OR.
Highlights
Low-carbon low-alloy steels with ferritic, ferritic-bainitic and bainitic structure are used for the production of pipes applied for the transportation of gas and oil products
Metallographic thin sections on the RD-ND plane were prepared on the samples
The initial samples after Thermo-Mechanical Controlled Processing (TMCP) were characterized by a predominantly bainitic structure formed within the limits formed during isothermal hot rolling of deformed austenite grains (ND size 10–30 μm) [7]
Summary
Low-carbon low-alloy steels with ferritic, ferritic-bainitic and bainitic structure are used for the production of pipes applied for the transportation of gas and oil products. The structure and texture of low-carbon low-alloy pipe steel after Thermo-Mechanical Controlled Processing (TMCP) and subsequent isothermal quenching were studied by the method of Electron Backscatter Diffraction (EBSD) analysis.
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