Fe-S 系に対する Mn, Al, Ti, Zr, V, Nb, Cr の影響 : 鋼中硫化介在物に関する研究 I

概要

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Most part of sulfur in steel precipitates as sulfide inclusions and it has remarkable effects on the various properties of steel. In order to reveal the effects of Mn, Al, Ti, Zr, V, Nb and Cr addition upon steel which contains up to 0.30%S, authors studied the crystal structures, the optical properties, the distribution, the etching behavior and the hot deformation characteristics of sulfide inclusions in steels containing one of those alloying elements. The results are as follows : (1) The formation of FeS, α-MnS, TiS, Zr_3S_4 or ZrS_2, VS, CbS and "CrS" was respectively observed, and aluminum sulfide considered to be Al_2S_3, was observed. (2) The crystal structure of sulfide inclusions was closely connected with their optical anisotropy. TiS, CbS and "CrS" were strongly anisotropic. (3) The etching behaviors of sulfide inclusions were different from one another. TiS, VS, NbS and "CrS" were not chemically attacked by 20% HF×10min etching. (4) α-MnS, "CrS" and sulfide in Al-added steel were deformed during hot-working. TiS, Zr_3S_4, ZrS_2 and VS, however, showed no deformation. Fe-S steel and Nb-added steel were not forgeable.
社団法人日本鉄鋼協会の論文
1964-11-01