Study on Preparation and Properties of Gradient AlCrTiSiN Coated Cemented Carbide Tools Deposited by Ion Source Enhanced Multi-arc Ion Plating Technology

doi:10.3901/JME.2019.19.213

Abstract

Abstract: Ion source enhanced multi-arc ion plating technology is adopted to fabricate the AlCrTiSiN composite coatings with different Si gradient structures on the surface of cemented carbide cutters. The effects of Si gradient coating structures on the microstructure, residual stresses, adhesion strength, friction and wear properties, milling and drilling against gray cast iron are studied in detail. The results showed that AlCrTiSiN composite coatings with different Si gradient coating structures are comprised of solid solution (Al, Cr)N, (Al, Ti)N and amorphous Si₃N₄. Among all the coatings, the G3 (Gradient 3) coating with the most gentle Si gradient structure show higher adhesion strength, the lowest residual compressive stress and the lowest friction coefficient and wear rate. The wear mechanism of coated cutters is mainly characterized by abrasive wear and adhesive wear. G3 coating decreased the abrasive wear, and also the milling and drilling experiment results showed that the G3 coated tools show the best cutting performance, which is attributed to the gradient design of Si containing layer, proper residual compressive stress (-3.8 GPa) and higher adhesion strength. This result show that gradient design of Si containing coating could effectively improve the cutting performance of the coated cutter.

Key words: tool coating, cutting performance, gradient structure, adhesion strength, wear resistance

CLC Number:

TG156

CAI Fei, GAO Ying, CAI Xijun, ZHANG Lin, ZHANG Shihong, WANG Qimin. Study on Preparation and Properties of Gradient AlCrTiSiN Coated Cemented Carbide Tools Deposited by Ion Source Enhanced Multi-arc Ion Plating Technology[J]. Journal of Mechanical Engineering, 2019, 55(19): 213-220.

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