一、前言 1972年我们试制了Ta-7.5％W丝,经碳化后作为制做色温达3600—3700的电影新光源灯丝,以达到提高机械强度和使用寿命的目的。制取Ta-7.5％W合金的方法较多,在试制过程中主要采用了电子束熔炼法和粉末成型烧结法,并拉出了直径0.5,0.325,0.2三种规格的丝。向用户提供了样品,试做 First, the foreword In 1972, we trial-Ta-7.5% W wire, after carbonization as a color temperature of 3600-3700 film production of new light source filament, in order to achieve the purpose of improving mechanical strength and service life. Preparation of Ta-7.5% W alloy more ways, mainly in the trial production process using electron beam melting and powder sintering, and pulled out the diameter of 0.5,0.325,0.2 three specifications of the wire. Provided to the user a sample, try it