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一、概述涂层硬质合金是近十余年内发展起来的一种新型刀具材料。通过化学气相沉积(CVD)等方法,在韧性较好的硬质合金基体刀片表面上,涂覆硬度和耐磨性很高的难熔金属化合物落层,使涂后的刀片具有良好的综合性能。在相同的刀具耐用度下,涂层硬质合金刀片允许采用较高的切削速度,或能在同样的切削速度下大幅度地提高刀具耐用度。与非涂层刀片相比,涂层刀片能降低一些切削力,并能改善加工表面质量。而且,涂层刀片的通用性也较好。作者试验表明,TiC涂层刀片的切削力比非涂层刀片降低3～4％,TiN涂层刀片的切削力比非涂层刀片降低6～9％(锐刀相比)。耐用度提高1～3.5倍。
First, an overview of coated carbide is developed in the past ten years a new tool material. By chemical vapor deposition (CVD) and other methods, better toughness of the carbide substrate blade surface, coated with high hardness and wear resistance of refractory metal compound layer, the coated blade has a good overall performance . With the same tool life, coated carbide inserts allow for higher cutting speeds or for greater tool durability at the same cutting speeds. The coated blade reduces some cutting forces and improves the machined surface quality compared to uncoated inserts. Moreover, the versatility of coated blades is also better. The authors’ experiments show that the cutting force of TiC coated inserts is reduced by 3-4% compared to uncoated inserts, and the cutting force of TiN coated inserts is reduced by 6-9% (compared with sharp knives) over uncoated inserts. Increased durability of 1 to 3.5 times.