EngD - Machinability of Titanium Alloys

山特维克科罗门特是金属行业刀具的世界领先者。为了保持我们的地位，我们必须不断调整和积累我们的知识，以了解我们客户的最新工艺和材料。该工程师将与山特维克科罗门特的工件材料团队合作，建立我们在钛合金加工方面的知识。已确定需要进一步考虑的具体主题是：-Ti-5-5-5-3可加工性，与Ti-6Al-4V相比。尽管过去有一些关于这一主题的学术研究，但为了将成本降至最低，这些研究往往集中在精加工工艺上。这使得这项工作与工业中看到的粗略应用程序有可疑的相关性。如果选择进行研究，在进一步确定这一方面的范围时应该考虑这一点。-加工锻造的Ti-6Al-4V部件中的阿尔法外壳。这应该包括分析在接近净形状的部件中形成阿尔法涂层的程度，以及这将对精加工过程产生的影响。-Ti-6Al-4V的干钻这些初步研究将是文献回顾和实验工作的混合体。钛合金的可加工性在学术界得到了广泛的研究，但通常集中在通过常规加工路线生产的Ti-6Al-4V基合金中。随着新合金进入主流使用，以及加工方法已转向近净生产和添加剂生产，我们需要了解这些变化的含义。我们的客户使用工具的方式可能不同，但对实际材料结构的可加工性知识也可能不完整。

Sandvik Coromant are the world leader in cutting tools to the metals industry. To maintain our position, it is essential that we adapt and build our knowledge constantly to understand our customers' latest processes and materials. This EngD is to work with the workpiece materials team within Sandvik Coromant, to build our knowledge of machining titanium alloys. Specific topics that have been identified for further consideration are;- Ti-5-5-5-3 machinability, in comparison with Ti-6Al-4V. Although there has been some academic research on this topic in the past, this has tended to focus on finishing processes, to minimise costs. This makes the work of questionable relevance to the roughing applications seen in industry. This should be considered in scoping this aspect further if it is selected for study.- Machining of the alpha case in as forged Ti-6Al-4V components. This should include an analysis of the extent to which alpha case is formed in near net shape components, and the implications that this will have on the finishing process.- Dry drilling of Ti-6Al-4VThese initial studies would be a mixture of reviews of literature and experimental work.Machinability of titanium alloys is a topic that has been widely examined in academic circles, but generally with a focus in Ti-6Al-4V based alloys produced through conventional processing routes. As new alloys have come into mainstream use, and as processing methods have changed towards near net and additive manufacture, we need to understand the implications of these changes. The way in which our customers use the tools may be different, but also the machinability knowledge of the actual materials structures may be incomplete.