A metal melting method that uses a plasma arc (an arc discharge of an airflow narrowed by heat and magnetic action). A transferred plasma arc is used, which uses the discharge between the electrode built into the torch and the metal itself. Because plasma torches are difficult to develop, their development is short, taking place in the 1960s, and they have only been used as an industrial process in the former East Germany, the former Soviet Union, and Japan. For economic reasons, the objects of melting are limited to high-grade special steels, superalloys, and high-melting-point metals, but in the former East Germany, furnaces of up to 35 tonnes were used to produce various types of steel, including low-alloy steel. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
プラズマアーク(熱および磁気作用により径の絞られた気流のアーク放電)を利用した金属溶解法。トーチに組みこまれた電極と金属自身との間の放電を利用した移送式プラズマアークが使われている。プラズマトーチの開発が難しいためにその開発の歴史は浅く1960年代に行われたもので,工業的プロセスとしては旧東ドイツ,旧ソ連,日本で利用されてきたにすぎない。溶解の対象は,経済上の理由から高級特殊鋼,超合金,高融点金属に限られるが,旧東ドイツでは最大35t炉を用いて低合金鋼を含む種々の鋼種が製造されていた。
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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