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纯镍,因其加工性能差而被看作难加工材料。切削镍时,最重要的特点是切削热集中于刀刃处,刀具磨损极为严重。在V=45米/分,f=0.25毫米/转时,用高速钢刀具加工镍,在刀刃附近,前刀面上温度达800°～850℃,后刀面上温度达900℃,大大超过了高速钢的相变温度,使刀具迅速失去切削能力。在V=8米/分,f=0.23毫米/转条件下,用YG6X硬质合金加工纯镍,后面磨损V_B=1.12毫米,切削路程仅17.6米。用超细颗粒硬质合金YH_1进行切削,情况亦相同。由此可知,纯镍加工不能采用高速钢和硬质合金刀具进行,而必须改用更新型的刀具材料。(参见《航天工艺》1983年第三期“纯镍的车削加工”一文)
Pure nickel, because of its poor processing performance is considered as difficult to process materials. Cutting nickel, the most important feature is the cutting heat concentrated in the blade, the tool wear is extremely serious. At V = 45 m / min and f = 0.25 mm / rev, nickel is machined from a high-speed steel tool. Near the edge, the temperature on the rake face reaches 800 ° to 850 ° C and the flank temperature reaches 900 ° C, High-speed steel phase transition temperature, the tool quickly lost cutting ability. At V = 8 m / min and f = 0.23 mm / rev, pure nickel was machined with YG6X cemented carbide, with a back wear of V_B = 1.12 mm and a cutting path of only 17.6 m. Cutting with ultra-fine grain cemented carbide YH_1 is the same. This shows that pure nickel processing can not be used high-speed steel and carbide cutting tools, but must switch to newer tool materials. (See article “Space Technology” 1983 third period “pure nickel turning process” article)