本文利用等离子体光谱诊断法对水下焊接电弧温度进行了比较系统的研究。
In this paper the temperature of underwater welding arc is investigated systematically by means of spectral diagnostics of plasma.
试验结果表明，电弧分流和射流脉动的频谱特性是一致的，在使用新等离子体喷枪时，电弧分流明显得到了限制。
Results show that the frequency spectrum characteristics of arc diffluence is accordance to jet fluctuation. Arc diffluence in the new gun is confined obviously.
采用高纯锡，通过自行设计的直流电弧等离子体蒸发设备制备了纯净的纳米锡粉。
The nanometer tin powders were prepared by DC arc plasma evaporation method using a self-designed and fabricated apparatus.
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