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首页> 外文会议>International Bhurban Conference on Applied Sciences and Technology >Evaluating the effectiveness of various coating layers applied on k-grade cemented carbide cutting tools on machinability of titanium alloy Ti-6Al-4V in high speed end milling
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Evaluating the effectiveness of various coating layers applied on k-grade cemented carbide cutting tools on machinability of titanium alloy Ti-6Al-4V in high speed end milling

机译：评估应用于K级硬质合金切削工具的各种涂层的有效性在高速端铣削中钛合金TI-6AL-4V的加工性

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Titanium alloys Ti-6Al-4V are widely used in many industrial and medical applications because of their superior qualities over many other alloys like aluminum and steel. Some of their properties like high strength to weight ratio, ability to maintain strength at elevated temperatures (around 500°C) and ability of corrosion resistance in severe environmental conditions has made them excellent to use in many aerospace and bio-medical industrial applications. But the properties which make them ideal for most practical applications severely hinders their machinability and therefore, the material is renowned as difficult to machine material. The low thermal conductivity of titanium alloys does not allow the generated heat to dissipate away quickly and thus results in chemical reaction with cutting tool materials at higher temperatures and due to which these alloys are still machined with un-coated carbide tools at very low cutting speeds and the advantage of machining at high speed machining regime for these alloys are still not seen. The high cost of super hard cutting tools and also possible chemical reaction with work material still does not allow industrialists to use these materials for machining of titanium alloy. On the other hand recent advances in deposition of coating material on carbide tools has attracted many researchers in finding their advantages and best optimal coating combination for enhancing machinability of titanium alloys with carbide tools. This study therefore is specifically aimed and designed in evaluating the effectiveness of different coating layers on k-grade cemented carbide cutting tool by studying their effect on cutting forces, tool stresses and heat distribution by using finite element numerical simulations at high speed cutting conditions. Finite element numerical simulations are widely employed in academic research field because it provides fast & reliable results and thus eliminates expensive experimentation costs which - therwise is always required. Three different type of coating materials has been used in this study and the results has shown that the k-grade cemented carbide cutting tool with multi-layer coating (AlO+TiAlN+TiN) has shown some advantages over uncoated and single layer coating (TiAlN) in terms of heat distribution, cutting forces and tool stresses at same cutting conditions due to higher hot strength and resistance to adhesion. It can be concluded from the study that multi-layer coated k-grade cemented carbide cutting tools can be used at slightly higher speeds than un-coated or single layer coated carbide tools and can give higher tool life as compared to single layer and un- coated carbide tools.
机译：钛合金的Ti-6AL-4V广泛用于因其优越的品质在许多其它合金等铝和钢许多工业和医疗应用。它们的一些性能如高的强度重量比，保持在升高的温度（500℃左右），并在恶劣环境条件下的耐腐蚀性的能力强度能力的已使它们具有优良的许多航空航天和生物医学工业应用中使用。但是，这使它们非常适用于大多数的实际应用性能严重阻碍其可加工性，因此，该材料是著名的难加工材料。钛合金的低导热性不允许产生的热量迅速消散掉，从而导致化学反应与在较高的温度，并且由于这些合金具有未涂覆的硬质合金刀具在非常低的切割速度仍然加工刀具材料在这些合金高速切削加工制度的优势仍然没有看到。超硬刀具，并与工作中可能存在的化学反应成本高，仍然不允许工业使用这些材料钛合金加工。在涂在硬质合金刀具材料的沉积另一方面的最新进展，吸引了众多的研究人员在寻找自己的优势，增强钛合金的切削加工用硬质合金刀具的最佳优化组合涂层。本研究因此是专门针对和设计通过研究其对通过使用有限元数值模拟在高速切削条件下切削力，工具的应力和热分布效果评估不同涂覆层的上的k级硬质合金切削工具的有效性。有限元数值模拟在学术研究领域广泛采用，因为它提供了快速和可靠的结果，从而消除了昂贵的实验费用 - therwise始终是必需的。三种不同类型的涂层材料已在此研究中使用，结果表明，与多层涂层（ALO +的TiAlN +锡）的k级硬质合金切削工具表现出超过未涂覆和单层涂层的一些优点（氮化铝钛）在由于较高的热强度和抗粘附性的热分布，切削力和工具的应力在相同的切削条件下的条款。它可以从研究，多层涂覆的k级硬质合金切削工具可以在稍微更高的速度比未涂覆的或单层涂层硬质合金工具一起使用，并且可以得到较高的工具寿命推断相比于单层和未涂层硬质合金工具。

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