论文标题
转弯期间Ti1-Xalxn涂层的结构变化：XANES和EXAFS研究磨损工具
Structural changes in Ti1-xAlxN coatings during turning: A XANES and EXAFS study of worn tools
论文作者
论文摘要
XANES，EXAFS，EDS和STEM研究了用于转动316升不锈钢的Ti1-XALXN涂层工具插件的结构变化。对于粗颗粒FCC结构的Ti1-Xalxn涂层，具有0 \ leq X \ leq 0.62，Xanes频谱随al-content变化。越过磨损样品的耙面部的Xanes Ti 1s线扫描表明，在Ti0.47Al0.53n和Ti0.38Al0.62n样品中，在转动过程中形成了富含锡的结构域。 Xanes光谱揭示了最富含锡的域的工具上的位置，表明工具芯片接触区的哪一部分在转弯过程中经历了最高温度。 Xanes光谱中的前边缘特征的变化表明，在转弯期间，在细粒Ti0.38Al0.62n的W-Tialn相中，结构变化也发生。 EDS表明，在加工过程中，CR和FE从钢和Fe粘附到工具耙面上。 Cr 1s和Fe 1s Xanes表明，CR在接触长度的末端被氧化，而粘附的FE则保留在与316L不锈钢相同的FCC结构中。
Structural changes in Ti1-xAlxN coated tool inserts used for turning in 316L stainless steel were investigated by XANES, EXAFS, EDS, and STEM. For coarse-grained fcc-structured Ti1-xAlxN coatings, with 0 \leq x \leq 0.62, the XANES spectrum changes with Al-content. XANES Ti 1s line-scans across the rake face of the worn samples reveals that TiN-enriched domains have formed during turning in Ti0.47Al0.53N and Ti0.38Al0.62N samples as a result of spinodal decomposition. The XANES spectra reveal the locations on the tool in which the most TiN-rich domains have formed, indicating which part of the tool-chip contact area that experienced the highest temperature during turning. Changes in the pre-edge features in the XANES spectra reveal that structural changes occur also in the w-TiAlN phase in fine-grained Ti0.38Al0.62N during turning. EDS shows that Cr and Fe from the steel adhere to the tool rake face during machining. Cr 1s and Fe 1s XANES show that Cr is oxidized in the end of the contact length while the adhered Fe retains in the same fcc-structure as that of the 316L stainless steel.
