Effect of Substrate Bias and Coating Thickness on the Properties of nc-AlCrN/a-Si_xN_y Hard Coating and Determination of Cutting Parameters

Abstract:

Nitride hard coatings Al_25.5Cr₂₁Si_3.5N were deposited on WC-Co substrates with a different thickness and a negative substrate bias voltage by the LAteral Rotating Cathodes Arc technology. The nanoindentation tests were performed for analysis of AlCrSiN coatings in order to determine the most promising combination of parameters for subsequent machining. On the basis of results of nanohardness measurement and Ratio H/E*, which represents the resistance to plastic deformation and cracking, deposition conditions were selected for coating of turning cemented carbide inserts. For the evaluation of coating adhesion to substrate, Mercedes adhesion test was used. Chip forming tests and long-term tool life tests were performed for determination of cutting parameters (cutting speed, feed rate and depth of cut) for AlCrSiN coated cemented carbide inserts when machining austenitic stainless steel material.

• Periodical: Solid State Phenomena (Volume 261)
• Pages: 229-236
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.261.229
• Online since: August 2017
• Authors: Tomáš Vopát*, Marián Haršáni, Marcel Kuruc, Vladimír Šimna, Rudolf Zaujec, Jozef Peterka, Ľubomír Čaplovič
• Keywords: Cemented Carbide Cutting Inserts, Hardness, Machining, Nanocomposite Hard Coatings

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