アルミナイズド鋼の基礎的研究（第2報）: 機械的性質について

概要

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The foundation materials (0.25% carbon steel) were used in the normalized-structure condition. They were carefully machined to size (6mm(phi)), and then dipped into molten aluminium bath held at 700℃. The time of immersion was respectively 5.30 and 60 sec. in order to know the difference in the thickness of alloying layer. The thicknesses obtained were respectively 0.015, 0.028 and 0.040mm. The static and impact tensile tests were made on the uncoated and the aluminized specimens. The results of the tests are summarized as follows: 1) Tensile strength and elongation of aluminized specimens were lower than those of uncoated specimens. But yield strength of coated specimens was better than that of uncoated specimens. 2) When the specimens were dipped for 5 sec., the cracks came out in the alloying layer itself, while the fractures of the foundation steel dipped for 60 sec. appeared along the boundary between the alloying layer and the foundation steel. 3) The specimens which were dipped for 5 seconds showed numerous small scales in all the surface of coating. When the time of immersion was 60 seconds, the specimens were broken along the boundary without the appearance of scales in the coating surface.
信州大学工学部の論文
1959-01-30