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涂层硬质合金刀具具有高的硬度、耐磨性,耐热性和抗月牙洼磨损能力,并能降低刀具与工件间的摩擦系数,具有很高的耐用度。此外,因它的通用性广,一种牌号的涂层硬质合金刀片常可胜任几个等级的未涂层刀片的切削工作,从而简化了刀具的管理。所以,近年来硬质合金刀具,特别是可转位刀片,涂层刀具的应用日益普遍。通常采用TiN(氮化钛)做硬质合金的涂层材料。众所周知,硬质合金TiN涂层一般都采用CVD(化学气相沉积)法,但因此法的沉积温度高,约1000℃左右,所以在涂层与硬质合金基体之间容易形成一层脆性的脱碳层,导致刀片脆性脱断,降低刀具的使用寿命。近年来的研究表明,只要正确掌握涂层工艺,PVD(物理气相沉积)法
Coated carbide tools with high hardness, wear resistance, heat resistance and resistance to crater wear, and can reduce the friction coefficient between the tool and the workpiece, with high durability. In addition, because of its versatility, a grade of coated carbide inserts can often handle several grades of uncoated inserts, simplifying tool management. Therefore, in recent years, the application of cemented carbide tools, especially indexable inserts and coated tools, is increasingly common. TiN (titanium nitride) is usually used as a cemented carbide coating material. As we all know, TiN carbide coatings are generally used CVD (chemical vapor deposition) method, but the law of the deposition temperature is high, about 1000 ℃, so in the coating and cemented carbide substrate easy to form a layer of brittle off Carbon layer, resulting in fragile blade off, reducing tool life. In recent years, research shows that as long as the correct grasp of the coating process, PVD (physical vapor deposition) method