Mechanical properties and cutting performance of Cr-Al-N hybrid coated microtool for micro high-speed machining of flexible fine die

作者：Kim M W; Kim K H; Kang M C^*; Cho S H; Ryu K T

来源：Current Applied Physics, 2012, 12: S14-S18.

DOI：10.1016/j.cap.2012.02.010

• Flexible fine die
• Cr-Al-N coatings
• Micro high-speed machining
• Micro-hardness
• Tool wear

In this paper, comparative studies on mechanical properties and cutting performance between CrN and Cr-Al-N coatings for high-speed machining of flexible fine die (FFD) were conducted. Ternary Cr-Al-N coatings, in which Al was incorporated into CrN, were synthesized onto WC-Co substrates using a hybrid coating system of arc ion plating and sputtering techniques. From XRD analysis the nanocomposite Cr-Al-N coatings were related to the composite microstructure consisting of the fine CrN crystallites and amorphous Si3N4. The average friction coefficient of Cr-Al-N coatings gradually decreased with Al content in CrN coatings. The values of tool wear for uncoated, CrN and Cr-Al-N coated tools were evaluated under a high-speed cutting condition using a vertical high-speed machining center. Consequently, the ternary Cr-Al-N coated micro-tool showed good cutting performance under micro highspeed machining of AISI W1-8 steel of hardness 52 HRC for flexible fine die.

• 出版日期2012-9