鋼の熱間加工に伴う硫化物系介在相の挙動

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タイトル別名
  • Behaviour of Sulfide Inclusions in Steel during Hot-working
  • コウ ノ ネツカン カコウ ニ トモナウ リュウカブツケイ カイザイソウ ノ キョドウ

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抄録

It is well known that the sulfide inclusions have a remarkable effect on the hot-workability of steel. In the present study, an examination was made to test the hot-workability of alloyed steel, containing various types of sulfide inclusion. And then, the deformation characteristics of individual sulfide during hot-working were clarified. For these purpose, the microscopic observations, chemical and X-ray analyses were made on sulfides isolated from specimens before and after forging.<BR>It was confirmed that addition of alloying elements, such as Ni, Co, Mo, W and Si had little effect on the nature of sulfide inclusion, and hence did not show any improvement of the hot-workability. On the other hand, addition of Zr, Ti, Mn, Al, V, Nb, and Cr turned iron sulfide into special sulfides, namely ZrS, TiS, MnS, Al2S3, VS, NbS and CrS, respectively, and improved the hot-workability of steel.<BR>MnS, CrS and Al2S3 showed considerable plasticity, and deformed into ellipsoids during hot-working. In the case of VS, NbS and TiS, however, fracturing with little or no deformation was observed. ZrS was a hard sulfide, and was scaresly changed during hot-working of steel.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 27 (7), 305-311, 1963

    公益社団法人 日本金属学会

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