在机床上利用硬质合金刀具来切削工作物,切削速度可以比一般最好的高速钢刀具快三、四倍,因此叫做高速切削。金属的切削速度,因刀具钢的硬度、耐高温性及耐磨性等的改进而增高。一百年前,使用高碳钢的最高切削速度是7.6公尺/分(卽每分钟7.6公尺)。过了五十年,有了现在的高速钢刀具,这种钢含有相当的钨和铬,它的耐高温性和耐磨性都有显著的增加,所以切削速度提高到约24公尺/分。白钢刀是用钴、铬、钨的一种合金制成的,里头并不含有铁,切削速度可以达到30公尺/分(这种“钢”已经用了三十多年)。就在那个时候,德国制造出一种碳化钨的合金,叫做“赛金钢”,後来经过逐渐改良,加入钴、钛等金属,而为碳化钨钴、碳化钨钛合金,使切削速度渐渐提高到180公尺/分,这也就是现在适合各种切削用的硬质碳化钨合 Carbide cutting tools on the machine tool to cut the work, the cutting speed can be three or four times faster than the best high-speed steel cutting tools, so called high-speed cutting. The cutting speed of metal is increased due to the improvement of hardness, high temperature resistance and wear resistance of tool steel. One hundred years ago, the maximum cutting speed for the use of high carbon steel was 7.6 meters per minute (7.6 meters per minute). After 50 years, with the current high-speed steel tools, the steel contains considerable tungsten and chromium, and its high temperature resistance and wear resistance have increased significantly, so the cutting speed is increased to about 24 meters/minute. . The white steel knife is made of an alloy of cobalt, chromium, and tungsten. It does not contain iron inside and the cutting speed can reach 30 meters/minute (this “steel” has been used for more than 30 years). At that time, Germany made an alloy of tungsten carbide, called “Saikin Steel,” and gradually improved, adding cobalt, titanium and other metals, and tungsten carbide, tungsten carbide and titanium alloys, cutting speed gradually Raise to 180m/min, which is now suitable for all kinds of cutting hard tungsten carbide