In this furnace, metals are melted in a high vacuum of 10-4 to 10-5 mmHg using an electron beam emitted from an electron gun with an accelerating voltage of 14 to 35 kV, and then solidified in a water-cooled copper mold to produce ingots. The heating efficiency of the electron beam is 75 to 85%, and high temperatures can be obtained. Since high temperatures can be obtained in a short time as well as a high degree of vacuum, this furnace is suitable for melting and refining high-melting point active metals such as titanium (Ti), zirconium (Zr), tantalum (Ta), niobium (Nb), and molybdenum (Mo). In addition, this furnace is excellent at removing impurity elements and gas components with high vapor pressures, and is also used to remelt and refine crude metals. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
10-4~10-5mmHgの高真空において,加速電圧14~35kVの電子銃から発射された電子ビームによって金属を溶解し,水冷銅鋳型で凝固させて鋳塊を製造する炉。電子ビームによる加熱効率は75~85%であり,高温が得られる。高真空度と同時に短時間で高温度が得られることから,高融点の活性金属であるチタンTi,ジルコニウムZr,タンタルTa,ニオブNb,モリブデンMoなどの溶解および精錬に適する。さらに,蒸気圧の高い不純物元素およびガス成分の除去に優れており,粗金属を再溶解して精製するさいにも使用される。
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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