...This powder metallurgy method was subsequently improved and is still used to produce tungsten and molybdenum. Meanwhile, melting methods have been developed, such as arc melting, which uses the heat from an arc to melt the metal, and electron beam melting, which uses electrons accelerated by high voltage to melt the metal. These methods make it possible to melt fairly large pieces that can still be processed. A copper crucible with a water-cooled exterior is used as the melting container. *Some of the terminology that refers to "arc melting" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…この粉末冶金法はその後改良されて,現在に至るまでタングステンとモリブデンの製造に利用されている。一方,溶解法としては,アークをとばしてその熱でとかすアーク溶解,高電圧で加速した電子をぶつけてとかす電子ビーム溶解が開発され,かなり大きな塊で,しかもその後加工の可能なものをとかすことができるようになっている。とかす容器には外部を水冷した銅製のるつぼが使われる。… ※「アーク溶解」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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