پوشش CBN-TiNکامپوزیتی: سنتز و تجزیه و تحلیل عملکرد
|کد مقاله||سال انتشار||مقاله انگلیسی||ترجمه فارسی||تعداد کلمات|
|27693||2003||9 صفحه PDF||سفارش دهید||4665 کلمه|
Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Journal of Manufacturing Processes, Volume 5, Issue 2, 2003, Pages 154–162
Cubic boron nitride (CBN) coating, due to its promising properties, is under development worldwide for machining and other related applications. To synthesize a continuous CBN coating by conventional vapor deposition methods (CVD/PVD), however, poses many challenges, such as metastable CBN phase stabilization, as well as the high levels of intrinsic stress developed during the growth. A novel combinatorial approach, which is under development in an effort to develop a CBN composite coating for cutting tools, is reported in this paper. The approach involves a two-step process consisting of electrostatic spray coating (ESC) of CBN particles, followed by chemical vapor infiltration (CVI) of TiN. The process is optimized to deposit a CBN-TiN composite coating with a thickness in excess of 10 μm on tungsten carbide inserts. Such coated tools have been successfully evaluated and tested for machining applications. For production on a commercial scale, the laboratory systems have been upgraded to industrial size. The outcome of scaling up from an experimental to an industrial-sized unit is reported in this paper. The industrial electrostatic spray coating unit, which can coat a batch of about 50 inserts in a couple of minutes, is currently being field tested.