噴射分散法による CaS 分散鋼に関する研究

概要

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An investigation has been made to make clear the condition for making a fine and homogeneous distribution of sulfide particles in steel which was made by Spray-Dispersion Method. Tensile properties of these steels have also been studied. The results obtained are summarised as follows ; 1) A homogenious distribution of fine sulfide particles is made by the addition of Zr or Ce (named distribution controlling element) in steel which has large standard free energies of sulfides formation (-⊿G°). 2) Mean particle diameter decreases with an increase of Zr or Ce content in steel and fine sulfide particles of less than 800 Å are dispersed in 0.5 at pct zirconium-steel or 0.5 at pct rare earth-steel. 3) Tensile strength and 0.2% proof stess of steel increase with the volume fraction of fine dispersed particles of less than 800 Å. 4) CaS-dispersed steels show larger work-hardening properties and elongation in tensile test than those of oxide-dispersed ones.
社団法人日本鉄鋼協会の論文
1978-12-01