石墨电极加工常用硬质合金刀具和高速钢刀具,采用这类昂贵的合金,即使刀具切削刃加热至600℃以上温度都是有效的。但是,加工石墨电极时,刀具切削刃温度不超过350℃,也就是说,对刀具耐热性的要求并不很高。看来,石墨电极加工刀具可采用不含钴、钨的铁合金铸造而成。本文阐述这类合金及其热处理工艺的研究结果。 Graphite electrode processing commonly used carbide cutting tools and high-speed steel cutting tools, the use of such expensive alloys, even if the tool cutting edge heating to temperatures above 600 ℃ are effective. However, the processing of graphite electrodes, the cutting edge temperature does not exceed 350 ℃, that is, the heat resistance of the tool is not very demanding. It appears that graphite electrode processing tool can be used without cobalt, tungsten iron alloy casting. This article describes the results of research on these alloys and their heat treatment processes.