The microstructure evolution of VC coatings on AISI H13 and 9Cr18 steel by thermo-reactive deposition process

Fan, Xianqiang; Yang, Zhi; Xia, Zhouhui; Zhang, C.; Che, Hanqing

doi:10.1016/j.jallcom.2010.06.064

Cited by 42 publications

(18 citation statements)

References 14 publications

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“…La microestructura de los recubrimientos producidos con el sistema DTR, depende de la movilidad superficial de los átomos de carbono en la superficie del sustrato, la cual se controla con los parámetros de depósito [16] y las propiedades químicas del sustrato [17]. Dependiendo del valor de la actividad del carbono en la superficie, se puede encontrar diferentes morfologías que seguramente modificarán el desempeño mecánico y la resistencia a la corrosión del recubrimiento.…”

Section: Resultados Y Discusiónunclassified

Recubrimientos de VC y NBC producidos por DRT: Tecnología económica, eficiente y ambientalmente limpia

Castillejo¹,

Flórez

2012

Cien.Ing.Neogranadina

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Section: Resultados Y Discusiónunclassified

Recubrimientos de VC y NBC producidos por DRT: Tecnología económica, eficiente y ambientalmente limpia

Castillejo¹,

Flórez

2012

Cien.Ing.Neogranadina

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“…TRD processes typically make use of borax-or chloride-based salt-baths [6,10,11,12], but the use of different deposition media can be found in the literature. Powder pack TRD processing has been applied as an alternative to salt bath, e.g chromizing for formation of hard chromium carbo-nitride layers [13] and powder pack vanadizing for growth of vanadium carbides [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…The TRD process should not be confused with CVD processes [e.g. 8,9], where carbide layers are deposited onto a substrate and the carbon is provided by the gas atmosphere; in TRD the carbon (or nitrogen) is provided by the steel itself and diffusion of the carbide/nitride forming element into the surface of the steel, albeit to a limited extent, secured a diffusion bond between carbide/nitride reaction layer and the steel.TRD processes typically make use of borax-or chloride-based salt-baths [6,10,11,12], but the use of different deposition media can be found in the literature. Powder pack TRD processing has been applied as an alternative to salt bath, e.g chromizing for formation of hard chromium carbo-nitride layers [13] and powder pack vanadizing for growth of vanadium carbides [14,15].…”

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confidence: 99%

Hard Surface Layers by Pack Boriding and Gaseous Thermo-Reactive Deposition and Diffusion Treatments

Christiansen

Bottoli

Dahl

et al. 2017

Materials Performance and Characterization

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Thermo-reactive deposition and diffusion (TRD) and boriding are thermochemical processes that result in very high surface hardness by conversion of the surface into carbides/nitrides and borides, respectively. These treatments offer significant advantages in terms of hardness, adhesion, tribooxidation and high wear resistance compared to other conventional surface hardening treatments. In this work 4 different materials, ARMCO, AISI 409, Uddeholm ARNE® (AISI O1 equivalent) and VANADIS® 6 PM steel representing different classes of alloys, i.e. pure iron, stainless steel and tool steels, were subjected to TRD (chromizing & titanizing) and boriding treatments. For the steels with low carbon content chromizing results in surface alloying with chromium, i.e. formation of a (soft) 'stainless' surface zone. Steels containing higher levels of carbon form chromium carbide (viz. Cr23C6, Cr7C3) layers with hardnesses up to 1800HV. Titanizing of ARNE tool steel results in a surface layer consisting of TiC with a hardness of approximately 4000 HV. Duplex treatments, where boriding is combined with subsequent (TRD) titanizing, result in formation of hard TiB2 on top of a thick layer of Fe-based borides. The obtained surface layers were characterized with X-ray diffraction, scanning electron microscopy, reflected light microscopy and micro-indentation. Keywords:Boriding; Thermo-reactive deposition and diffusion (TRD); Chromizing; Titanizing; TiB2 1.IntroductionThermochemical surface engineering of metallic materials is widely applied for applications where components are exposed to (excessive) wear or where other surface characteristics are desired, e.g. fatigue and corrosion resistance [1]. Conventional and commonly applied methods include carburizing, carbo-nitriding and ferritic nitriding/nitrocarburizing in many different commercial variants. For applications where high hardness is needed, e.g. where excessive wear is encountered, boriding and thermo-reactive diffusion processes can be applied.Boriding is a process where boron is diffused into a material resulting in formation of a compound layer consisting of hard borides of the elements present in the treated substrate. When the process is applied on steels, iron borides are formed with a hardness of more than 1600 HV [2,3,4]. The borides formed are typically FeB and Fe2B as well as borides of the alloying elements, e.g. Cr andMo [2,3]. For tribological applications a single layer of Fe2B is usually preferred since it is less brittle than FeB [3,5]. Different process media are possible, including powder pack, salt bath and plasma.The Thermo Reactive Deposition and Diffusion (TRD) process was originally developed by Arai [6,7] and is also known as the Toyota diffusion process. The substrate to be treated is typically immersed in a molten (borax) salt bath containing strong carbide or nitride forming elements. The carbide/nitride forming element (e.g. V, Nb, Cr etc.) reacts with the carbon or nitrogen in the base material to form a thin reaction layer of (hard) ca...

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“…On the other hand, chromium has a high solubility in austenite to allow for a solid solutionlayer [9]. The results of observation using SEM, shows more clearly the difference of region between substrate matrix and layer.…”

Section: Characterization Of Carbide Coating Layermentioning

confidence: 99%

“…Both regions are separated by a flat interface. The morphology of layer/substrate interfaces is related to nucleation and growth behavior in the early stages of the TRD process [9].…”

Section: Characterization Of Carbide Coating Layermentioning

confidence: 99%

Optimizing the dual elemental thermal reactive deposition time in carbide layer formation on SUJ2 tool steel

Mochtar¹,

Putra²,

Mahardika

2018

AIP Conference Proceedings

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Characterization and observation of water-based nanofluids quench medium with carbon particle content variation AIP Conference Proceedings 1964, 020006 (2018) Abstract.This paper presents developments contributing to the improvement of thermo-reactive deposition (TRD) process in producing hard carbide layers, on automotive components application. The problem in using FeV powder as a coating material that has been applied in the industries is it is high cost. In this study,

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The microstructure evolution of VC coatings on AISI H13 and 9Cr18 steel by thermo-reactive deposition process

Cited by 42 publications

References 14 publications

Recubrimientos de VC y NBC producidos por DRT: Tecnología económica, eficiente y ambientalmente limpia

Recubrimientos de VC y NBC producidos por DRT: Tecnología económica, eficiente y ambientalmente limpia

Hard Surface Layers by Pack Boriding and Gaseous Thermo-Reactive Deposition and Diffusion Treatments

Optimizing the dual elemental thermal reactive deposition time in carbide layer formation on SUJ2 tool steel

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