Abstract
The usefulness of nitrogen as the heating atmosphere of titanium was examined and evaluated by comparing with air atmosphere which is undesirable to titanium, and argon atmosphere which is inert to titanium. The results obtained are as follows:(1) Increase in weight by heating is much less in nitrogen than in air.(2) With molten caustic soda, the nitride formed on the surface of titanium in nitrogen atmosphere can be removed fairly easily than the oxide formed in air atmosphere.(3) Embrittlement of titanium due to contamination by atmospheric gas is fairly less with nitrogen than with air.(4) Putting all the results together, it may be said that as the heating atmosphere of titanium nitrogen is generally superior to air, especially in the case of heating at above 800°C.
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