Kennametal

About: Kennametal is a company organization based out in Fürth, Germany. It is known for research contribution in the topics: Cutting tool & Coating. The organization has 1275 authors who have published 1801 publications receiving 24084 citations.

Performance of PVD TiN, TiCN, and TiAlN coated cemented carbide tools in turning

Abstract: Ion-plated PVD TiN, TiCN, and high-ionization sputtered PVD TiAlN coatings were deposited on WC–6wt%Co hardmetal inserts. Microstructural and mechanical properties of the coatings and substrate were characterized. Coated tools were evaluated in turning of Inconel 718, medium carbon SAE 1045 steel, and ductile iron at low and high cutting speeds. TiAlN coated tools showed the best metalcutting performance, followed by the TiCN and TiN coated tools. The superior performance of the TiAlN coated tools, which was even greater at higher speeds, is related to the coating's higher resistance to abrasive and crater wear. These characteristics are a result of the higher hot hardness and oxidation resistance of TiAlN at the temperatures normally encountered at the tool tip during machining operations.

State of the art in hard coatings for carbide cutting tools

Abstract: The majority of carbide cutting tools in use today employ hard coatings because coatings offer proven benefits in terms of tool life and machining performance. Continuing development of the chemical vapor deposition (CVD) coating process, the most widely used technique, has produced complex multilayer coatings tailored for specific applications and workpiece materials. These coatings include alumina layers of different crystal structures, and TiCN layers applied by high- or moderate-temperature (MT-CVD) processes. Over the last decade, coatings applied by physical vapor deposition (PVD) have gained acceptance in applications requiring sharp edges or those featuring interrupted cuts. Originally limited to TiN coatings, the PVD offering now includes TiCN and TiA1N coatings which provide better high-speed performance and increased abrasive wear resistance. In the area of superhard coatings, improvements in deposition processes and coating adhesion have resulted in diamond-coated carbide tools that have begun to play an important role in machining non-ferrous and non-metallic materials. This paper presents the state of the art in hard coatings for carbide cutting tools including discussion of coating characteristics and applications.

A new class of high performance PVD coatings for carbide cutting tools

Abstract: A number of advanced PVD coating designs based on Ti–Al–N–C–B were evaluated in metalcutting Monolayer PVD TiN, TiAlN, TiB 2 and different variants of TiAlN multilayer coatings were deposited on WC-6 wt% Co hardmetal inserts The coatings were applied either by cathodic arc processes or a high-ionization magnetron sputtering process The coated tools were evaluated in milling of ductile and gray cast irons with and without coolant, and in turning of Inconel 718 and a hypereutectic AlSi alloy The TiAlN-multilayer coated tools showed the best performance in dry milling applications; the TiAlN-monolayer coated tools performed better under wet milling The observed results are consistent with a model that takes into consideration the inherent residual stresses within the coating, the stresses during machining, and the bonding strength of the coating layers to the substrate In Inconel 718 turning, the TiAlN-multilayer coating showed some performance advantage over the TiAlN-monolayer and the TiN/TiCN/TiAlN-multilayer coating particularly at higher speed In the turning of the aluminum alloy, PVD TiB 2 had performance advantage over PVD TiAlN and PVD TiN, which could be correlated with their relative hardness values