Development of a hybrid coating process as an advanced surface modification for cutting tools and moulds

Sato, Takao; Sugai, Kenichi; Ueda, S.; Matsunami, Kouji; Yasuoka, Masahito

doi:10.1016/s0257-8972(03)00073-2

Cited by 10 publications

(3 citation statements)

References 6 publications

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“…Industry expectations towards new types of coatings concern not only higher mechanical resistance, abrasive wear resistance or thermal resistance, but also an effective resistance to simultaneous influence of several external factors. The effect of those expectations was the development of new layers with a complex structure called hybrid * E-mail: jerzy.smolik@itee.radom.pl layers [8,9] resulting in the necessity of applying complex technological processes called multi-stage technologies or hybrid technologies [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

The influence of thickness of CrN coating on the durability of hot forging dies

Smolik

2011

Open Engineering

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This article presents results which enabled the determination of the role of CrN coating and the influence of its thickness on the effectiveness of hybrid layer "nitrided layer / CrN coating" in the process of increasing the durability of forging dies. Dies coated with hybrid layers "nitrided layer / CrN coating" with various CrN coating thickness were -after different maintenance periods -subjected to metallographic testing, 3D shape testing and SEM analysis. Hardness distribution was also determined. The obtained results revealed that for all tested dies, independently from CrN coating thickness, the main mechanisms of their destruction was mechanical and thermal fatigue, and plastic deformation. It has been shown that the main role of CrN coating in the hybrid layer "nitrided layer / PVD coating" is to counteract a high temperature influence the source of which is forging on die material. In order to do so the CrN coating should be characterized by a considerably lower thermal conductivity coefficient to steel and low hardness so that it can efficiently resist fatigue processes in the forging process. Based on testing conducted by means of the sin 2 ψ method, it was revealed that internal stresses are vitally important for CrN coating for fatigue resistance of hybrid layer "nitrided layer / CrN coating" during the forging process.

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Section: Introductionmentioning

confidence: 99%

The influence of thickness of CrN coating on the durability of hot forging dies

Smolik

2011

Open Engineering

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“…(1-4) Estas superfícies podem ser obtidas pela nitretação e revestimento em um mesmo reator, processo híbrido (3,(5)(6)(7)(8)(9) ou por um tratamento de duas etapas, com a pré-nitretação sob plasma seguida do revestimento PVD, processo descontínuo.…”

Section: Introductionunclassified

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

Franco¹,

Tschiptschin²,

Pinedo³

2009

TMM

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As propriedades obtidas pela pré-nitretação sob plasma, seguida do revestimento PVD, são resultado da divisão de funções entre substrato/ camada nitretada/revestimento e da combinação das melhores propriedades de cada componente no conjunto. A melhoria de desempenho é de interesse especial para aplicações em condições complexas de solicitação térmica, química e mecânica, especialmente em ferramentas. (10,11) Sabe-se que a presença da camada de compostos na interface entre o revestimento TiN e a zona de difusão afeta de maneira adversa as propriedades tribológicas. Atualmente, a nitretação sob plasma com baixo potencial de nitrogênio na mistura gasosa é utilizada em trata- INTRODUÇÃOA tecnologia de engenharia de superfície na geração de superfícies dúplex, combinando nitretação sob plasma e revestimento PVD (Plasma Assisted Physical Vapor Deposition), tem encontrado aplicação crescente na indústria como forma de elevar as propriedades tribológicas de componentes de aço.(1-4) Estas superfícies podem ser obtidas pela nitretação e revestimento em um mesmo reator, processo híbrido (3,(5)(6)(7)(8)(9) ou por um tratamento de duas etapas, com a pré-nitretação sob plasma seguida do revestimento PVD, processo descontínuo.(4) O tratamento dúplex produz uma superfície com um revestimento de TiN fino, duro com elevada resistência térmica, química e ao desgaste, suportado por uma camada espessa e endurecida pelas reações de nitretação. Frequentemente, este conjunto é denominado superfície dúplex. UTILIZAÇÃO DA NITRETAÇÃO SOB PLASMA COMO PRÉ-TRATAMENTO AO REVESTIMENTO TIN-PVD NA GERAÇÃO DE SUPERFÍCIES DÚPLEX NO AÇO AISI H13 ResumoEste trabalho apresenta o estudo da adesão de revestimentos de TiN-PVD em aço ferramenta para trabalho a quente tipo AISI H13, após pré-tratamento de nitretação sob plasma. A nitretação sob plasma foi conduzida a 520°C, sob diferentes misturas gasosas e tempos. Após a nitretação sob plasma as amostras foram revestidas com TiN. A adesão do TiN foi avaliada pelo método de indentação Daimler-Benz. As cargas críticas de ensaio (L C ) foram avaliadas após o trincamento do revestimento (L C1 ) e após a delaminação (L C2 ). A adesão do revestimento é dependente das propriedades mecânicas da camada nitretada na região da interface. A adesão aumenta quando a relação H/E e o grau de recuperação elástica da camada nitretada torna-se próximo ao do TiN. Palavras-chave: Nitretação por plasma; Superfícies; Revestimento; Adesão. USE OF PLASMA A NITRIDING PRE-TREATMENT AND TIN-PVD FOR GENERATION OF DUPLEX SURFACE ON AISI H13 STEEL AbstractCoating 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 (L C ) were determined for coating cracking (L C1 ) and coating delamination (L C2 ). Coating adhesion is dependent on the mechanical properties of the pre-...

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“…Many approaches aim to enhance the load bearing capacity of the coated surfaces and improve the adhesion of the coatings such as deposition of an interlayer material or compound prior to the coating or the treatment of the surface by nitriding [6-9], carburizing, borizing, nitrocarburizing and so on. However, in terms of the cost and complexity, nitriding or carburising is a better candidate than the other methods.…”

Section: Introductionmentioning

confidence: 99%

Quantifying Cutting and Wearing Behaviors of TiN- and CrNCoated AISI 1070 Steel

Cakan

Özkaner

Yıldırım

2008

Sensors

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Hard coatings such as titanium nitride (TiN) and chromium nitride (CrN) are widely used in cutting and forming tools against wear and corrosion. In the present study, hard coating films were deposited onto AISI 1070 steels by a cathodic arc evaporation plating (CAVP) technique. These samples were subjected to wear in a conventional lathe for investigating the tribological behaviour of coating structure, and prenitrided subsurface composition was characterized using scanning electron microscopy (SEM), line scan analyses and X-ray diffraction (XRD). The wear properties of TiN- and CrN-coated samples were determined using an on-line monitoring system. The results show that TiN-coated samples demonstrate higher wear resistance than CrN-coated samples.

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Development of a hybrid coating process as an advanced surface modification for cutting tools and moulds

Cited by 10 publications

References 6 publications

The influence of thickness of CrN coating on the durability of hot forging dies

The influence of thickness of CrN coating on the durability of hot forging dies

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

Quantifying Cutting and Wearing Behaviors of TiN- and CrNCoated AISI 1070 Steel

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