共查询到19条相似文献,搜索用时 328 毫秒
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玉水 《世界制造技术与装备市场》1997,(2)
提供经济涂层方法的新金刚石涂层技术,可控制在切削刀具刀片、圆形刀具(如钻头和铰刀)、曲面、不规则表面和大平面上金刚石涂层的沉积厚度。由位于美国密执安州Dearborn市的Turchan Technologies Group的成员QQC Inc.提出的这一方法,是使用激光和专利技术进行表面涂层,这种表面涂层已成功地应用到金属切削刀具和铣刀片的生产上。 使用QQC方法进行金刚石涂层比有竞争力的CVD和PVD工艺过程约快1000倍。不象CVD和PVD工艺过程 相似文献
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《工具技术》1984,(9)
<正> 成都工具研究所近期开发研究的刀具氮化钛物理气相沉积(PVD—physicalvapor Deposition)涂层工艺,是属于八十年代的新技术。氮化钛具有高硬度、化学稳定性较好、与被加工材料摩擦系数小等优点,一直被选用制作化学气相沉积(CVD—Chemical vaporDeposition)硬质合金涂层刀片的涂层材料。但由于CVD 涂层温度较高(900—1100℃),不适合制作涂层高速钢刀具(尤其是精密刀具),直到七十年代后期,国外研究成功刀具氮化钛PVD 涂层技术,才使涂层高速钢刀具的设想得以实现。涂层高速钢刀具的出现,被称为高速钢刀具的革命,它可成倍提高刀具寿命,并可提高切削速度30%左右。因此,在国外工具制造业中它正处于迅速发展的阶段。工具所研究的氮化钛PVD 涂层技术,系标用空心阴极电子枪反应离子沉积原理,采用与南充机器厂协作研制的刀具涂层试验设备。该技术包括:(1)刀具表 相似文献
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赛利涂层技术有限公司 《工具技术》2010,44(1):I0014-I0014
赛利涂层技术有限公司是全球PVD涂层及CVD金刚石涂层领域的技术领导者德国CemeConAG公司在中国的全资子公司。公司自2003年成立以来,通过提供涂层加工服务和涂层设备销售,与国内众多刀具机械加工企业建立了良好的合作关系,从而得到了迅速的成长。 相似文献
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《工具技术》1991,(6)
<正> 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。 相似文献
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由高速钢及其它工具钢制成有坚硬而耐磨涂层的切削刀具,要比有涂层的硬质合金刀片约晚十年才得到广泛应用(见ME杂志87年3月号)。这主要因为低温物理气相沉积(PVD)工艺的发展较晚,它却比化学气相沉积(CVD)工艺更适用于在高速钢及其它工具钢上进行涂层,而且刀具随后无需再热处理。氮化钛是在高速钢上用PVD法最常 相似文献
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涂层刀具的性能及确定方法 总被引:2,自引:1,他引:2
目前涂层被认为是延长刀具寿命最重要的工艺方法之一。本文研究了沉积到HSS质合金上的PVD和CVD涂层的性能。通过分别考虑基体和涂层的影响,阐明了涂层刀具之间性能的原因。另外,文中重点介绍一种分析涂层热力学性能对刀具磨损影响的新方法,使我们明白了以前不能解释的现象。 相似文献
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超硬化合物表面涂覆处理技术在冷冲模具上的应用 总被引:1,自引:0,他引:1
对采用PVD、CVD和PCVD表面涂覆处理的六角切边模和内六角冲头的生产使用情况和使用寿命进行了比较,其中PCVD涂层模具寿命比未涂层模具提高一倍以上。提出了改善涂层与基体间结合强度的途径和方法,并对冲击载荷下涂层模具的失效机理进行了分析。 相似文献
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介绍了PVD刀具的涂层方法,概述了国内外PVD技术的发展趋势,指出了PVD技术将是刀具行业的主流技术,应用前景十分广阔。 相似文献
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《Measurement》2016
Machining of Nimonic C-263 has always been a challenging task owing to its hot strength, low thermal conductivity, tendency to work harden and affinity towards tool materials. Although coated tools have been used to overcome some of these challenges, selection of coated tool with appropriate deposition technique is of immense significance. The current study attempts to comparatively evaluate various performance measures in machining of Nimonic C-263 such as surface roughness, cutting force, cutting temperature, chip characteristics, and tool wear with particular emphasis on different modes of tool failure for commercially available inserts with multi-component coating deposited using chemical vapour deposition (CVD) and physical vapour deposition (PVD) techniques. Influence of cutting speed (Vc) and machining duration (t) has also been investigated using both coated tools. The study demonstrated remarkable decrease in surface roughness (74.3%), cutting force (6.3%), temperature (13.4%) and chip reduction coefficient (22%) with PVD coated tool consisting of alternate layers of TiN and TiAlN over its CVD coated counterpart with TiCN/Al2O3 coating in bilayer configuration. Severe plastic deformation and chipping of cutting edge and nose, abrasive nose and flank wear along with formation of built-up-layer (BUL) were identified as possible mechanisms of tool failure. PVD coated tool successfully restricted different modes of tool wear for the entire range of cutting speed. Superior performance can be attributed to the hardness and wear resistance properties, thermal stability due to presence of TiAlN phase and excellent toughness owing to PVD technique and multilayer architecture. 相似文献
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Tribological testing of some potential PVD and CVD coatings for steel wire drawing dies 总被引:1,自引:0,他引:1
The aim of this study was to investigate the possibility to replace cemented carbide wire drawing dies with CVD or PVD coated steel dies. Material pick-up tendency, friction and wear characteristics of four different commercial coatings – CVD TiC and PVD (Ti,Al)N, CrN and CrC/C – in sliding contact with ASTM 52100 bearing steel were evaluated using pin-on-disc testing. The load bearing capacity of the coating/substrate composites was evaluated using scratch testing. The results show that the friction characteristics and material pick-up tendency of the coatings to a large extent is controlled by the surface topography of the as-deposited coatings which should be improved by a polishing post-treatment in order to obtain a smooth surface. Based on the results obtained in this study, three different coatings – CrC/C, TiC and dual-layer TiC/CrC/C – are recommended to be evaluated in wire drawing field tests. CrC/C and TiC are recommended due to their intrinsic low friction properties and material pick-up tendency in sliding contact with steel. The dual-layer is recommended in order to combine the good properties of the two coatings CrC/C (low shear strength) and TiC (high hardness). 相似文献