This is essentially a development of thoria dispersion strengthened nickel alloys .

这基本上是 用 二 氧化 钍 弥散 强度 化的镍基合金。

To ensure the purity grade and flow rate of shielding inert gas to use tungsten electrode activated with nanosized thoria are two better ways to decrease the erosion rate of electrode .

采用纳米 氧化物 添加钨电极以及保证保护惰性气体的纯度和流量可以降低钨电极的烧蚀， 保证 焊接质量。