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当前位置:花开棋牌 > 技术文章 > 实验真空电弧炉优点跟注意事项成正比,都很多!

实验真空电弧炉优点跟注意事项成正比,都很多!

花开棋牌DIANJICISHU:280 FABUSHIJIAN:2019/9/9 16:17:10

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花开棋牌实验真空电弧炉习惯上又叫做纽扣炉、母合金熔化炉,是指用气体的一种弧光放电原理熔炼金属的工业炉。电弧是气体的一种弧光放电。气体弧光放电表现为极间电压很低,但通过气体的电流却很大,有耀眼的白光,弧区温度很高(约5000k)。巨大的电流密度来自于阴极的热电子发射,以及电子的自发射,即在阴极附近有正离子层,形成强大的电场,使阴极自动发射电子。大量电子在极间碰撞气态分子使之电离,产生更大量的正离子和二次电子,在电场作用下撞击阴极和阳极,结果获得高温。阴极因电子发射用去部分能量,所以温度低于阳极。极间也因部分正离子与电子复合放热而产生高温。电弧炉即是用这种原理熔炼金属的工业炉.在真空环境下的电弧炉就是真空电弧炉.真空电弧熔炼采用大电流低电压,属于短弧操作。

 

 

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