Comparison of the oxidation behaviour of WC–Co and WC–Ni–Co–Cr cemented carbides

Aristizabal, M.; Sanchez, J.M.; Rodríguez, N.; Ibarreta, F.; Martı́nez, R.

doi:10.1016/j.corsci.2011.05.006

Cited by 93 publications

(37 citation statements)

References 18 publications

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“…It is because at these temperatures, the oxidation ability of the carbide phase is limited. The situation is reversed at higher temperatures: the oxidation ability of the binder is limited, and tungsten trioxide WO 3 readily forms [14][15][16][17].…”

Section: Graphmentioning

confidence: 97%

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Properties and Testing of Cemented Carbides

Kříž¹,

Bricín²

2017

Powder Metallurgy - Fundamentals and Case Studies

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This chapter deals with selected properties of cemented carbides and their testing. It consists of three main sub-chapters. The first one covers the degradation processes associated with grinding of cemented carbides. Among those, the focus is on the effects of thermal loads and reactions with the environment-the atmosphere. The second main sub-chapter describes the origin of residual stresses and their impact on cemented carbide properties. Finally, the third main sub-chapter explores the corrosion of cemented carbides in various environments. The choice of these topics was inspired by the impression that many users have of cemented carbides: indestructible materials in which no degradation takes place either during the production of cutting tools or during their use. As evidenced by the authors' experience described below, which has been acquired over many years in the field, damage in cemented carbides is a very frequent occurrence. Despite that it still receives very little attention, and especially the damage in cemented carbide cutting tools tends to be ascribed to various other factors, such as the applied coatings, the cutting process conditions and the material of the workpiece.

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Section: Graphmentioning

confidence: 97%

“…The porosity of this layer is thought to be related to gaseous CO and CO 2 being released at the interface between the cemented carbide and the atmosphere. At higher binder levels, the layer becomes less porous, more compact and consists of the complex oxide CoWO 4 [14][15][16][17].…”

Section: Graphmentioning

confidence: 99%

Properties and Testing of Cemented Carbides

Kříž¹,

Bricín²

2017

Powder Metallurgy - Fundamentals and Case Studies

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“…Although it has been reported that the oxidation resistance of cemented carbides is improved by increasing the Co content [9], it has recently been demonstrated that this improvement is actually due to the presence of a higher amount of dense CoWO 4 within the oxide scale (more protective than WO 3 ), which reduces porosity [44]. …”

Section: Accepted Manuscript 13mentioning

confidence: 99%

Influence of temperature on the biaxial strength of cemented carbides with different microstructures

Chicardi

Bermejo

Gotor

et al. 2018

International Journal of Refractory Metals and Hard Materials

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Abstract. The effect of the temperature on the mechanical strength of WC-Co cemented carbides with different microstructures (grain size and binder content) was evaluated. Biaxial flexural tests were performed on three cemented carbide grades at 600°C using the ball-on-three-balls (B3B) method. Results were interpreted by Weibull statistics and compared to biaxial strength results at room temperature. A detailed fractographic analysis, supported by Linear Elastic Fracture Mechanics, was performed to differentiate the nature and size of critical defects and the mechanism responsible for the fracture. A significant decrease in the mechanical strength (around 30%) was observed at 600ºC for all grades of cemented carbides. This fact was ascribed to the change in the critical flaw population from sub-surface (at room temperature) to surface defects, associated with the selective oxidation of Co. Additionally, an estimation of the fracture toughness at 600°C was attempted for the three cemented carbides, based upon the B3B strength results, the corresponding number of the tested specimens fragments and the macroscopic area of the B3B fracture surfaces. The fracture toughness was not ACCEPTED MANUSCRIPT A C C E P T E D M A N U S C R I P T2 affected by the temperature, at least up to 600ºC. In addition, the good agreement with the Single Edge Notch Beam toughness data suggests the possibility of employing this approach for fracture toughness evaluation of brittle materials under different testing conditions.

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“…The literature reveals many studies regarding the oxidation resistance of cemented carbides at high temperatures [9][10][11][12][13][14], as well as some investigations related to the thermodynamic stability of Ti(C,N)-based cermets [15][16][17] with conventional matrices.…”

Section: Introductionmentioning

confidence: 99%

Influence of heat treatment on the high temperature oxidation mechanisms of an Fe–TiCN cermet

Alvaredo

Abajo

Tsipas

et al. 2014

Journal of Alloys and Compounds

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Please cite this article as: P. Alvaredo, C. Abajo, S.A. Tsipas, E. Gordo, Influence of heat treatment on the high temperature oxidation mechanisms of an Fe-TiCN cermet, (2013), doi: http://dx.doi.org/10.1016/j.jallcom. 2013.12.009 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractIn this study, the oxidation behaviour of an iron matrix cermet containing 50 % vol. Ti(C,N)was investigated before and after heat treatment by oxidation tests performed in static air at temperatures between 500 °C and 1000 °C. The oxidation mechanism for this type of composite materials was established and it was found that the heat treated material presents lower mass gain than the as-sintered material at the early stages of the oxidation, due to the volatilization of oxides. The oxidation behaviour of the sintered cermet was compared to those obtained for two commercial materials used in the fabrication of cutting tools, a highspeed steel and a cemented carbide, revealing a higher oxidation resistance for the iron matrix cermet due to the formation of a self-protective layer during the oxidation process.

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Comparison of the oxidation behaviour of WC–Co and WC–Ni–Co–Cr cemented carbides

Cited by 93 publications

References 18 publications

Properties and Testing of Cemented Carbides

Properties and Testing of Cemented Carbides

Influence of temperature on the biaxial strength of cemented carbides with different microstructures

Influence of heat treatment on the high temperature oxidation mechanisms of an Fe–TiCN cermet

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