真空溶融法における N および CO ガスの抽出について : 真空溶融法による鉄鋼中ガス分析に関する考察 I

概要

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The authors made some experiments to study the effects of various alloying elements on the analytical values of N and O in steels by the vacuum fusion method. Obtained results are as follows. (1) As for the N gas, by the vacuum fusion the samples containing Cr, Mo, or V make the extraction incomplete and the values obtained are lower than those by the chemical (Kjeldahl) method. This is considered to be caused by the increase of N solubility in molten steels. (2) As for the CO extraction, it is known that the samples containing Al or Mn give lower values and that the metal film condensed on the inner wall of apparatus adsorbs the CO gas. The authors analysed capsule shaped pure iron specimens to which Al or Mn were added and ascertained that the O values decreased qantitatively with increases of such elements. The Mo-hood effectively prevented the formation of the condensed metal film and recovered O values.
社団法人日本鉄鋼協会の論文
1964-05-01