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硬质合金可转位刀具中,涂层刀具已占60～70%,几乎全是化学涂层(CVD)。CVD处理时,合金基体表面承受高温,抗弯强度下降50%,为防止尖崩刃和破损,需进行倒棱和钝化。物理涂层(PVD)结合强度低,涂层易剥离,未广泛使用。为克服这一缺点,新近开发了阴极电弧PVD涂层技术。下表是使用刀具与加工条件。这里的数据是各种涂层刀具的比较数据。试验刀具是Kennametal公司的K-2S和N-60,其中N-60是Multi-Are3341(即MAV32)物理涂层,K-2S是阴极电弧PVD涂层。切削试验机床为Cazenueve HB725。被加工材料为不锈钢4340。
Carbide indexable knives, coated knives have accounted for 60 to 70%, almost all chemical coating (CVD). CVD treatment, the alloy substrate surface withstand high temperatures, bending strength decreased by 50%, to prevent sharp chipping and damage, the need for chamfering and passivation. Physical coating (PVD) low bonding strength, easy to peel coating, not widely used. To overcome this shortcoming, cathodic arc PVD coating technology has recently been developed. The following table is the use of cutting tools and processing conditions. The data here is a comparison of various coated tools. The test tool was K-2S and N-60 from Kennametal Corporation, where N-60 is a Multi-Are3341 (ie MAV32) physical coating and K-2S is a cathodic arc PVD coating. Cutting test machine Cazenueve HB725. The material is stainless steel 4340.