二三の高級構造用鋼の機械的性質及び組織に及ぼす砒素の影響に就て

概要

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As the content of arsenic in common steel increased during the war, the present investigation was set about as a counter-plan for it feeling anxious for the unfavorable influence of it on high grade structural steel. The three kinds of steels, such as carbon steel, Si-Mn-Cr steel and Cr-W steel were tested by adding 1.0% As in maximum to each of them. As the result of test, yield point, tensile strength and hardness increased with an increase of As content, while, elongation, reduction of area and impact value decreased conve sely. In all of these steels, as the result of inspection on the influene of arsenic in case 1.0% As was contained, the followig results were obtained : yield point increased by 15∿20%, tensile strength and hardness respectively by about 10%, while, elongation decreased by 2∿15%, reduction of area by 20∿30% and impact value by 50∿70%. Generally, less influence was observed in special steel than in carbon steel. Microscopical structure becane ununiform with an increase of arsenic, but no change was observed especially in structure. The structure of a broken section grew worse with an increase of arsenic con'ent. Almost any influence of As was not observed in Austenite grain size.
社団法人日本鉄鋼協会の論文
1948-06-25