酸化物含有焼結鉄圧延板の機械的性質

概要

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Oxide (SiO_2 or Al_2O_3) particles were embeded to iron powder, and they were pressed, sintered at 850℃ for 1 hr in a hydrogen atmosphere, rolled and annealed. The recrystallized grain size and the textures of the sheets were examined, and the relationship between these characteristics and tensile properties of the sheets were discussed. Effects of fine oxide particles added (amorphous SiO_2 and γ-Al_2O_3 : about 200Åφ) on the mechanical properties of the sheet were found to be remarkably high comparing with those of larger size (α-SiO_2 and α-Al_2O_3 : about 2 μmφ). In this case, the elongation decreased in general owing to fine recrystallized grain size in the matrix, although its increase appeared in the range of 0.4∿0.7 vol.% addition in iron sheets. This fact suggested that the elongation was affected by the annealing texture which had been changed by additive content in the sheet. As a result, it was found that the dispersed oxide particles and the restraint of recrystallization of the sheet by these particles improved the strength of the sheet, and exerted a major influence on the other mechanical behaviours. Moreover, it was considered that a compound was formed at the interface between iron and oxide (SiO_2 or Al_2O_3) during the sintering process.
社団法人日本鉄鋼協会の論文
1979-02-01