抄録
In the present investigation solubilities of nitrogen under one atmospheric pressure in 10 kinds of elements (Ca, Cu, Cr, Mn, Mo Ni, Si, Ti, V, W, ) and 7 kinds of binary ferrous alloys (Fe-Ni, Fe-Co, Fe-Cr, Fe-Mn, Fe-Al, Fe-Si, Fe-Ti)- are determined. The results obtained are as follows. No solubilities of nitrogen in Ni, Co, Cu and W are observed at temperatures below 1200°, while a great deal of it is absorbed in nitride forming elements, i.e. Cr, Mn, Si, Ti and V. The quantities of nitrogen absorbed decrease as the rise of temperature owing to the decomposition of the nitrides except those at relatively lower temperatures. The solubilities of nitrogen in Fe-Co and Fe-Ni alloys which make continuous series of solid solution decrease as the content of Co or Ni in the alloy increases. In Fe-Cr and Fe-Mn alloys the reverse is the case. In Fe-Al and Fe-Si alloys, rich in Al and Si respectively, N2 is absorb-ed by them forming definite nitride which has no solubility in iron.
