Comparison of wear resistant MMC and white cast iron

Berns, Hans

doi:10.1016/s0043-1648(02)00300-9

Cited by 136 publications

(70 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…due to its excellent performance under wear and abrasion conditions [36][37][38][39][40]. In particular, hardness, fracture toughness and wear resistance have been measured in hypoeutectic and hypereutectic WCIs with different Cr content [36,37].…”

Section: Methodsmentioning

confidence: 99%

“…The results obtained with this approach, which does not account for the GWT, have been experimentally validated in multiple cylindrical bar castings and in one production part. On the other hand, white cast iron (WCI) with high chromium (Cr) content was the focus of several experimental investigations due to its excellent performance under wear and abrasion conditions [36][37][38][39][40]. In particular, hardness, fracture toughness and wear resistance have been measured in hypoeutectic and hypereutectic WCIs with different Cr content [36,37].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling and Simulation of the Gray-to-White Transition during Solidification of a Hypereutectic Gray Cast Iron: Application to a Stub-to-Carbon Connection Used in Smelting Processes

Urrutia

Celentano

Gunasegaram

2017

Metals

View full text Add to dashboard Cite

This work reports on experimental and numerical results of the gray-to-white transition (GWT) during solidification of a hypereutectic gray cast iron (GCI) in a casting test using a stub-to-carbon (STC) connection assembly. Since in this process non-uniform cooling rates are produced, the mechanical properties are expected to spatially vary due to the development of different microstructures along the thimble. The twin aims of this work were to (1) experimentally validate the GWT prediction capabilities of the microstructural model proposed earlier by the authors in the rodding process of a hypereutectic GCI-STC, and (2) estimate, from the numerically obtained microstructure and ultimate tensile strength (UTS), the local hardness of the alloy after the numerical predictions of the microstructure were experimentally validated. To this end, the final microstructure at different points of the thimble and the hardness profile along its radial direction were measured for validation purposes. Moreover, this rodding process was simulated using an extension of a thermal microstructural model previously developed by the authors and the GWT was superimposed on that simulation. The computed results encompass cooling curves, the evolution of gray and white fractions, eutectic radii and densities and, in addition, the hardness profile. A detailed discussion of the experimental and numerical results is presented. Finally, the computed GWT was found to adequately reproduce the experimental data.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of the Gray-to-White Transition during Solidification of a Hypereutectic Gray Cast Iron: Application to a Stub-to-Carbon Connection Used in Smelting Processes

Urrutia

Celentano

Gunasegaram

2017

Metals

View full text Add to dashboard Cite

show abstract

“…Cette couche, composée de phosphates mixtes de Zinc et de Fer, serait la base du développement des germes cristallins de phosphates tri métalliques. Leur raisonnement se base sur l'existence d'anions complexes (Zn PO 4 ) -issus de la réaction de dissolution du dihydrogéno-phosphate de Zinc [17][18][19]. Selon W. MACHU ; M. GEBHARDT, quel que soit le procédé de phosphatation, la couche de conversion chimique se compose d'une partie interne au contact du métal constitué d'oxyde de fer et de phosphate de fer.…”

Section: Introductionunclassified

Influence de la phosphatation au zinc sur la résistance a la corrosion d’un acier au carbone en milieu maring

Ettaqi¹,

Irhzo²,

Daoudi³

et al. 2010

Afrique Science: Revue Internationale Des Sciences Et Technologie

View full text Add to dashboard Cite

RésuméDans le cadre de cette étude, nous avons montré que l'allure des courbes cathodiques du métal non phosphaté, plaide en faveur d'un processus cinétique essentiellement contrôlé par une diffusion pure. La vitesse de corrosion, aussi bien celle déterminée à partir des courbes cathodiques que celle obtenue par dosage colorimétrique du fer passé en solution, augmente lorsque la vitesse de rotation de l'électrode augmente. Ceci conforte l'hypothèse d'un contrôle diffusionnel. La phosphatation de l'électrode ne semble pas modifier l'allure des courbes cathodiques. Toutefois, la hauteur du palier de diffusion dépend de l'épaisseur de la couche de phosphatation et prend des valeurs inférieures à celles de l'acier non revêtu pour une épaisseur de la couche de phosphatation supérieure à deux micromètres. La couche de phosphatation renforce notablement la résistance à la corrosion de la couche interne, composée essentiellement d'oxydes de fer, par la diminution de la vitesse de corrosion au fur et à mesure que l'épaisseur de la couche croît. Néanmoins, l'effet bénéfique de la phosphatation est maximum pour une épaisseur de trois micromètres. Cette constatation se manifeste également lors du comportement anodique. Mots-clés:Phosphatation au zinc, corrosion, acier XC N10, milieu marin (NaCl 3%). Abstract Zinc phosphatation influence on the resistance to corrosion of a carbonbased steel in marine mediumIn the frame of the present investigation, we have showed that the profile of the cathodic curves of a non phosphated metal, plead in favour to a kinetic profile essentially monitored by a pure diffusion. The corrosion rate, obtained from the cathodic curves as Abdelouahab Ettaqi et al. 261Afrique SCIENCE 01(2) (2005) 261 -276 well as by a colorimetrical dosage of the dissolved iron, increases when the rotation speed of the electrode increases. Which show a diffusional control the phosphatation of the electrode does not seem to modify the cathodic curves profile. However the height of the diffusion palier depends on the thickness of the phosphatation layer. It takes values lower than those of an uncovered steel for a layer thickness of two micrometers the phosphatation layer reinforce notably the resistance to the corrosion of the internal layer which is essentially composed with iron oxides, by decreasing the corrosion rate with the increase of the layer. However, the benefical effect of the phosphatation is maximal for a thickness of three micrometers. This effect occurs also during the anodic behaviour.

show abstract

“…2,3) Fe-12$35Cr-C white cast irons are used as hardfacing alloys; these alloys have a high hardness value due to their high M 7 C 3 content. [4][5][6][7] M 7 C 3 is surrounded by austenite, which is relatively soft in comparison to the extremely hard M 7 C 3 . Consequently, cracks propagate along the interface between austenite and M 7 C 3 .…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Wear Characteristics of Hypoeutectic, Eutectic and Hypereutectic (Cr,Fe)<SUB>23</SUB>C<SUB>6</SUB> Carbides in Hardfacing Alloys

Kuo

Fan

et al. 2007

Mater. Trans.

View full text Add to dashboard Cite

This study investigates the microstructure and wear characteristics of hypoeutectic, eutectic and hypereutectic (Cr,Fe) 23 C 6 carbides in hardfacing alloy cladding by using gas tungsten arc welding (GTAW). Chromium and graphite alloy fillers were used to clad ASTM A36 steel substrates. These coatings were specially designed to vary the size and proportion of the (Cr,Fe) 23 C 6 carbides that are present in the microstructure at room temperature. Depending on the amount of graphite used in the alloy filler, a hypoeutectic, eutectic or hypereutectic microstructure was obtained on the coated surface. The wear behavior indicated that the abrasive wear resistance is not only simply related to the hardness of the deposit but that it is also determined by the carbides and matrix structure of the coating. The hypereutectic carbides have the largest (Cr,Fe) 23 C 6 carbide content and the maximum hardness; however, they show the worst wear resistance due to the large particles were dug out during wearing.

show abstract

Comparison of wear resistant MMC and white cast iron

Cited by 136 publications

References 6 publications

Modeling and Simulation of the Gray-to-White Transition during Solidification of a Hypereutectic Gray Cast Iron: Application to a Stub-to-Carbon Connection Used in Smelting Processes

Modeling and Simulation of the Gray-to-White Transition during Solidification of a Hypereutectic Gray Cast Iron: Application to a Stub-to-Carbon Connection Used in Smelting Processes

Influence de la phosphatation au zinc sur la résistance a la corrosion d’un acier au carbone en milieu maring

Microstructure and Wear Characteristics of Hypoeutectic, Eutectic and Hypereutectic (Cr,Fe)<SUB>23</SUB>C<SUB>6</SUB> Carbides in Hardfacing Alloys

Contact Info

Product

Resources

About