Comparison of mechanical properties of various PVD hard coatings for forming tools

Abstract

In the present paper the basic mechanical properties of PVD hard coatings, which are currently used in Konč ar Alati company for wear protection of forming tools manufactured on request of the Electrolux Group, with emphasis on the Electrolux Home Products company, Denmark A/S, have been compared. This company has high demands on tool performance for machining and forming of several different workpiece materials, such as sheet steel, stainless steel, aluminium and Teflon coated sheet. Two different deposition methods were used for preparation of hard coatings: sputtering using unballanced magnetron sources -CC800 (CemeCon) and cathode arc evaporation [BAI 1200 (Balzers)]. The coatings for test were deposited on four different tool steels. It was found that the hard coatings investigated in the present work showed a wide range of mechanical properties: microhardness in the range of 900-3200 HV, critical load for total delamination in the range of 75-135 N, indentation modulus in the range of 120-390 GPa and the scratching coefficient in the range of 0 . 02-0 . 09.

Influence of the C content on the mechanical and tribological properties of the TiCN coatings deposited by LAFAD technique

“…Surface engineering of cutting tools and mechanical components by the deposition of hard transition metal nitride and carbide coatings has long been proven an effective way to improve their tribological properties, and therefore, their service life [1][2][3][4]. Titanium carbonitride (TiCN) coatings are very interesting coatings that combine the high hardness and low friction coefficient of the TiC phases and the high toughness of the TiN phases [5][6][7][8][9].…”

Selection of Steels and Coatings for Cold-Work Tools

“…These corners produced 4000 parts before the coating had worn off. In the meantime, the spare corners were coated with TiCN nanostructured layer, as this coating should increase adhesive wear resistance and provide longer lifetime [6,7]. Its microhardness was 3000 HV 0 05 , comparable to TiAlN coating.…”

“…3. Besides proper steel selection, surface coatings are today equally important, as they can significantly prolong the tool life and reduce the related costs [6].…”

“…It has influenced the maintenance costs: it was calculated Table 1.-Assignment of the type of triboelements, relative motions, mode of wear, and the preferable wear mechanism to specific surface modification treatment [4]. that the saving was 27,000 Euro/year [5]. Tool history in relation to the used tool materials and coatings is shown on Fig.…”

Coating technology in hydro-turbines for sediment affected power plants: A review

“…It depends on the mechanical characteristic studies of 6 different PVD hard coatings. It was discovered that CrAlN (Alcrona)/D2 and CrAlN/Vanadis 6 combinations had the greatest adhesion; TiAlN/D2 had the largest micro hardness; and WC/C hard coating had the shortest indentation modulus and abrasion coefficient [22].…”