实验发现弧根和弧梢处的气体温度相等，并随着气体流量的增大而下降。
It was found that the gas temperatures at arc root and arc tip are equal and they decrease with the argon flow rate increasing.
随着气体流量的增大，弧梢处与弧根处的振动温度均下降，但弧梢处下降速率较快。
With gas flow rate increasing, the vibrational temperature at both tip and root decreases, but the decreasing rate at arc tip is faster than that at arc root.
结果表明：沿等离子体从弧根到弧梢位置，OH自由基数量迅速减少，O原子数量呈现先增多后减少的规律。
The results show that the number of OH radicals decreases rapidly and the number of o atoms follows a rule of increasing firstly and then decreasing from arc root to arc tip.
所述换热面为拱形或向中间上方倾斜的换热面，由多根弧 形或向中间上方倾斜的换热管组成。
The heat exchanging surface is arched or is inclined upward at the middle part and consists of a plurality of heat exchanging pipes which are arc-shaped or inclined upward at the middle parts.
结果表明，清根方式对焊缝冲击韧度有明显影响，用碳弧气刨清根得到的焊缝冲击韧度最好，而用酸性衬垫得到的焊缝冲击韧度最差。
It was found that impact toughness of weld metal was maximum using carbon arc air gouging, and it was minimum using acid backing.
通过对13 -5型马氏体不锈钢焊接接头进行等离子弧清根及碳弧气刨清根的比较，证明等离子弧清根对全焊透焊缝实施背面清根是可行的。
By comparing backgouging of plasma arc with carbon arc to the welded joint of 13-5 martensitic stainless steel, the backgouging of plasma arc is proved feasible for the full penetration weld.
通过对13 -5型马氏体不锈钢焊接接头进行等离子弧清根及碳弧气刨清根的比较，证明等离子弧清根对全焊透焊缝实施背面清根是可行的。
By comparing backgouging of plasma arc with carbon arc to the welded joint of 13-5 martensitic stainless steel, the backgouging of plasma arc is proved feasible for the full penetration weld.
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