White layer formation and hardening effects in hard turning of H13 tool steel with CrTiAlN and CrTiAlN/MoST-coated carbide tools
White layer formation and hardening effects in hard turning of H13 tool steel with CrTiAlN and CrTiAlN/MoST-coated carbide tools
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DOI：
10.1007/s00170-006-0899-2
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发表时间：
2008-03
期刊：
影响因子：
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通讯作者：
A. Aramcharoen;P. Mativenga;Manufacturing Laser Processing Group
中科院分区：
文献类型：
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作者：
A. Aramcharoen;P. Mativenga;Manufacturing Laser Processing Group
白层又硬又脆，通常与拉应力相关，因此会降低机加工部件的疲劳寿命。几位作者报告称，使用 CBN/PCBN 和陶瓷切削刀具进行车削加工后，部件上会形成白层。然而，几乎没有任何研究报道新型和低成本涂层碳化物的白层形成。本文的研究旨在确定 CrTiAlN 和 CrTiAlN+MoST 以及高切削速度对切削工具钢白层形成的影响。以传统高切削速度车削后对 H13 工具钢 (57 HRC) 进行了检查。涂层刀具可降低工件和刀具温度。因此，与未涂覆的工具相比，涂覆的工具导致硬化效果降低且更均匀。此外，较高的切割速度产生的白色层可以忽略不计。因此，本文阐述了涂层对传统和高速加工中表面硬化的好处。
White layers are hard, brittle and normally associated with a tensile stress and hence the ability to reduce the fatigue life of machined components. Several authors have reported the formation of white layers on components after turning processes by using CBN/PCBN and ceramic cutting tools. However, there are hardly any studies that have reported on white layer formation for new and low-cost-coated carbides. The study in this paper was conducted to determine the effect of CrTiAlN and CrTiAlN+MoST and high cutting speeds on white layer formation in machining tool steel. H13 tool steel (57 HRC) was examined after turning at a conventional and high cutting speed. Coated tools resulted in lower workpiece and tool temperatures. Hence coated tools resulted in reduced and also more homogeneous hardening effects compared to the uncoated tool. In addition, the higher cutting speed produced negligible white layers. Thus, the paper elucidates on the benefits of coatings on surface hardening in conventional and high speed machining.