UTILIZAÇÃO DA NITRETAÇÃO SOB PLASMA COMO PRÉ-TRATAMENTO AO REVESTIMENTO TiN-PVD NA GERAÇÃO DE SUPERFÍCIES DÚPLEX NO AÇO AISI H13

Coating adhesion on hot work tool steels type AISI H13 after plasma pre-nitriding treatment is studied. Nitriding treatments were carried out at 520°C using different gas mixtures and time. After plasma nitriding surfaces were TiN coated by PVD. Adhesion was evaluated using Daimler-Benz indentation...

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Published inTecnologia em metalurgia, materiais e mineração Vol. 5; no. 3; p. 179
Main Authors Franco Junior, Adonias Ribeiro, Pinedo, Carlos Eduardo, Tschiptschin, André Paulo
Format Journal Article
LanguagePortuguese
Published Sao Paulo Associação Brasileira de Metalurgia, Materiais e Mineração 01.01.2009
Subjects
Adhesion tests
Automobile industry
Automobiles
Automotive engineering
Automotive parts
Coating
Delamination
Elastic recovery
Failure
Gas mixtures
Hot work tool steels
Indentation
Ion nitriding
Loads (forces)
Mechanical properties
Plasma
Plasmas (physics)
Titanium nitride
Tool steels
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Summary:Coating adhesion on hot work tool steels type AISI H13 after plasma pre-nitriding treatment is studied. Nitriding treatments were carried out at 520°C using different gas mixtures and time. After plasma nitriding surfaces were TiN coated by PVD. Adhesion was evaluated using Daimler-Benz indentation method. Critical failure loads (LC) were determined for coating cracking (LC1) and coating delamination (LC2). Coating adhesion is dependent on the mechanical properties of the pre-nitrided surface close to the interface. Adhesion increases when the H/E ratio and the degree of elastic recovery of the plasma nitrided case become close to that of TiN.
ISSN:2176-1515
2176-1523
DOI:10.4322/tmm.00503010