@article{oai:niigata-u.repo.nii.ac.jp:00002931,
 author = {大川, 成剛 and 渡辺, 孝一 and 金谷, 貢 and 中野, 周二 and 宮川, 修 and 小林, 正義},
 issue = {4},
 journal = {歯科材料・器械, 歯科材料・器械},
 month = {Jul},
 note = {アルゴン吹き付け雰囲気と置換雰囲気の二つの雰囲気でチタン鋳造体を作製した.鋳造体の引張強さと破断伸び, および硬さを測定し, それらを鋳造体中のOとNの含有量と関連づけて検討した.アルゴン吹き付け雰囲気で得た鋳造体の引張強さと硬さは, 置換雰囲気のそれより大きいが, 伸びは逆であった.Oの含有量は, インゴット, インゴットを溶解凝固させたもの, 鋳造体の順に多かった.置換雰囲気中でインゴットを溶解凝固させたものと鋳造体のOの含有量は, アルゴン吹き付け雰囲気の場合より多い傾向にあった.これに対して, アルゴン吹き付け雰囲気で得た鋳造体のNの含有量は, 置換雰囲気のそれの13〜15倍であった.この結果から, 上で述べたアルゴン吹き付け雰囲気と置換雰囲気における鋳造体の機械的性質の違いは, Nの含有量に関係することが示唆された., Titanium castings were prepared in two atmospheres; one was argon-arc melted and cast in the ambient atmosphere(AA) and the other was argon-arc melted and cast in the argon-replaced atmosphere(ARA).Tensile test and Vickers hardness measurement were conducted. The results were discussed in relation to the contents of oxygen and nitrogen absorbed by titanium during the melting and the casting procedures. While the tensile strength and the hardness of castings obtained in AA were higher than those of castings obtained in ARA, the elongation exhibited the reverse relation. The oxygen content was ranked from least to most: the ingot, the solidified and the cast. The oxygen content of the solidified and the cast obtained in ARA tended to be higher than that of castings obtained in AA. On the contrary, the nitrogen content of castings obtained in AA was 13 to 15 times higher than that of castings obtained in ARA. The results of this study indicate that the nitrogen content relates to the above-mentioned difference in mechanical properties of castings obtained in AA or ARA.},
 pages = {330--334},
 title = {鋳造雰囲気の違いによるチタン鋳造体の機械的性質},
 volume = {16},
 year = {1997}
}