高マンガン-アルミニウム青銅の合金成分と自己焼鈍について

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  • The Chemical Compositions and Self-Annealing of High-Manganese-Aluminium-Bronze Castings
  • コウマンガン アルミニウム セイドウ ノ ゴウキン セイブン ト ジコ ショウドン ニ ツイテ

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It is well known that the embrittlement (so-called self-annealing) of Al-bronze containing β phase is caused by the transformation β→α+γ2 at slow cooling, and on adequate Mn addition to Cu-Al alloys causes the β phase to stabilize. Then we tried to obtain a chemical composition of Al-Bronze containing β phase for large castings showing no self-annealing by stabilizing β phase. At first, studying the mechanical properties of slow-cooled castings of Cu-Al-Mn system (Al5∼12%, Mn0∼14%), it became known that (α+β) Al-bronze containing 6∼14% of Mn in addition would not undergo self-annealing at slow cooling. Then we improved the mechanical properties of Cu-Al-Mn system by Ni and Fe addition, and obtained the alloys for large castings consisting of the following composition:<BR>(This article is not displayable. Please see full text pdf.) <BR>Such Mn-Al-bronzes have excellent proof stress, corrosion resistance to sea water, and show as little change in mechanical properties by variation of the cooling rate as Ni-Al-bronze.

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  • 日本金属学会誌

    日本金属学会誌 26 (6), 402-406, 1962

    公益社団法人 日本金属学会

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