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关于电极低损耗的理论,作者曾从热传导的观点做过论述[1.],现在再将电极低损耗的原因概述如下: 1.一次放电过程中,放电时间越长,放电柱(放电柱半径γ_0=1.2τ_p~(0.4)I_p~(0.4)mm)膨胀越大,能量密度越低。由于铜电极传温系数大(约为工具钢的10倍),温度衰减较快,从而熔化深度很小,而钢的熔化深度继续增加。由此熔化深度比γ_h(某种程度上代表了电极损耗率)可达
On the low-loss electrode theory, the author has done from the heat conduction point of view [1], and now the reasons for the electrode low loss is summarized as follows: 1. A discharge process, the longer the discharge time, the discharge column (discharge column radius γ_0 = 1.2τ_p ~ (0.4) I_p ~ (0.4) mm) The larger the expansion, the lower the energy density. Due to the large temperature coefficient of copper electrode (about 10 times the tool steel), the temperature decay faster, so the melting depth is very small, and the molten steel depth continues to increase. Thus, the melt depth ratio γ_h (to some extent, represents the electrode loss rate) is reached