鋼中水素の逸出に關する二, 三の實驗

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Some experimental results on the behaviours of hydrogen in solid steel were presented from the authors' recent studies, as follows ; 1) Even at the ordinary temperatures, evolution of hydrogen from steel surface was unexpectedly remarkable. The authors captured the evolved hydrogen as dispersed bubbles or islets in oil which had been applied between the specimen or product surface and cellophane attached thereon. 2) As a practical example of the above mentioned, which caused much attention to the ship building and relevant industries throughout Japan, experience with the bubbling phenomenon found at the shrinkage boundaries of larger built-up crankshafts for marine Diesel engines was introduced and some results of the authors' investigations were presented. In this connection, such similar phenomena as at the shrink-fitted portions of heavy guns and of large sleave rolls were also indicated. 3) In the stressed state, whether tensile or compressive, some 30∿50% of the dissolved hydrogen was likely to be forced to diffuse out from the steel specimens which had been soaked hot in hydrogen and were containing some 2.2∿3.5 cc of hydrogen per 100 grammes of steel. This finding, if it be true, might give some new scopes to the study on the behaviours of hydrogen in steel, particalarly viewing from its combined effect with co-existing stresses upon the hair-line crack formation. The experiments have been made continuously since then, the results of which would be made public shortly.
社団法人日本鉄鋼協会の論文
1953-05-25

鋼中水素の逸出に關する二, 三の實驗

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