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高速钢中钨、铬及钒的复杂碳化物,在钢样电解后与氧化夹杂共存于电解残渣内,较难分离,故电解前须进行淬火,以使大部分碳化物固溶于基体。淬火温度,对 P18高速钢以1260～1280℃为适合,对 P9高速钢以1240～1250℃为宜。高速钢电解分离后,残渣中的碳化物易吸附气体,故需采用双电解液电解,亚硫酸盐双电解液近乎中性,使高速钢的电解得以平静进行。
High-speed steel, tungsten, chromium and vanadium complex carbides, after the steel-like electrolysis and oxidation mixed coexist in the electrolytic residue, more difficult to separate, so before electrolysis to be quenched, so that most of the solid solution of carbide in the matrix. Quenching temperature, P18 high-speed steel to 1260 ~ 1280 ℃ for the P9 high-speed steel to 1240 ~ 1250 ℃ appropriate. High-speed steel electrolysis separation, the residue of the carbide easy to adsorb gas, so the need for dual electrolyte electrolysis, bisulfite electrolyte nearly neutral, so that high-speed steel electrolysis can be carried out calmly.