S1304-1-3 TiB_<2+α>を骨格としたTi合金加工用潤滑性硬質膜の創成(先端材料と加工)

概要

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In this work, we attempt to develop the lubritious and hard films based on TiB_<2+α> for cutting of Ti (titanium) alloys. In the experiment, we have prepared the TiB_2 and TiB_<2+α> thin films by DC magnetron sputtering using TiB_2 and TiB_2+10wt%B targets. We controlled the Ar gas flow rate and the base pressure to improve the mechanical properties of the TiB_<2+α> films. The TiB_<2+α> films having high hardness more than SOGPa were able to be obtained under the low base pressure. And the TiB_<2+α> thin films showed the high critical load almost equal to TiN films. Moreover, at the optimized coating condition, the TiB_<2+α> films were produced on tungsten carbide cutting tools. And turning tests were carried out against Ti alloys by using the high speed precision lathe.
2009-09-12