水素が鋼の機械的性質に及ぼす影響 : 所謂水素脆性に就て

概要

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The author made experiments on the influence of hydrogen upon the mechanical properties of steel at normal and high temperatures, and attained the following results : - The hydrogen brittleness, when the steel absorbed hydrogen is suddenly cooled at a temperature below the transformation point, varies as the structure of the steel. That of the coarse-grained structure, which cooled in furnace from 1, 200℃, is the most brittle in comparison with those quenched and tempered or furnace-cooled from 830℃. In each case, however, there is no change in the tensile strength and also no influence of hydrogen appears in the impact tension test. In the case that the steeel containing hydrogen is quenched at a temperature above the transformation point, the tensile strength and the contraction of area decrease considerably, which results in easy quenching cracks and also the hydrogen brittleness appears in the impact tension test. The experimental results at high temperature show that when the hydrogen is dissolved within the dissolution limit the brittleness does not occur at that temperature. Even if the hydrogen is excessively absorbed at a high temperature, the hydrogen brittleness does not appear at and above the blue-short temperature.
社団法人日本鉄鋼協会の論文
1939-05-25