| 钍钨电极是钨中添加1~4%tho2的电极。电子逸出功约2.7ev,比纯钨低40%,引弧电压低,易起弧,电弧稳定,载流能力提高30%,烧损率低,寿命延长。钍钨电极在直流焊接方面应用比较广泛。
牌号 model | 掺杂质 intermingled materials | 掺杂量 intermingled quantity | 色标 color standard | wt10 | tho2 | 0.90~1.20 | 黄 yellow | wt20 | tho2 | 1.80~2.20 | 红 red | wt30 | tho2 | 2.80~3.20 | 紫 purple | wt40 | tho2 | 3.80~4.20 | 桔黄 orange | 请参照以下表格,选购对应直径的电极。please refer to the following table when selecting your electrodes:电极直径(mm) | 直径偏差(mm) | 直流(a) dc(a) | 交流(a) | diameter of electrode(mm) | diameter tolerance(mm) | 电极接正极positive contact | 电极接负极negative electrode | ac(a) | 0.50 | ±0.05 | 2~20 | - | 2~15 | 1.00 | ±0.05 | 10~75 | - | 15~70 | 1.60 | ±0.05 | 60~150 | 10~20 | 60~125 | 2.00 | ±0.05 | 100~200 | 15~25 | 85~160 | 2.50 | ±0.10 | 170~250 | 17~30 | 120~210 | 3.20 | ±0.10 | 225~330 | 20~35 | 150~250 | 4.00 | ±0.10 | 350~480 | 35~50 | 240~350 | 5.00 | ±0.10 | 500~675 | 50~70 | 330~460 | 6.00 | ±0.10 | 600~900 | 65~95 | 430~500 |
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