An investigation of the erosion–corrosion characteristics of ductile cast iron

Zhou, Yue; Lu, Zhenlin; Zhan, Min

doi:10.1016/j.matdes.2005.07.011

Cited by 37 publications

(20 citation statements)

References 6 publications

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“…CADI consists of a certain amount of carbides in the typical ausferritic matrix; the carbides can help to improve the wear resistance. Presently, CADI has attracted intensive attention in many areas such as railway, mining industry, and defense structures [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Molybdenum on the Wear Resistance and Corrosion Resistance of Carbidic Austempered Ductile Iron

Han

Wang

Sun

et al. 2015

Metallogr. Microstruct. Anal.

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The effects of molybdenum on the microstructure, wear resistance, and corrosion resistance of carbidic austempered ductile iron were studied. The results show that the microstructures of as-cast samples are mainly composed of nodular graphite, pearlite and carbides, and the nodularization grade is 2-3 and graphite size is 6-7 magnitude in all samples. With the increase of Mo content, the amount of nodular graphite decreases, but the pearlite and carbides increase. The microstructures of all heattreated samples mainly consist of nodular graphite, acicular ferrite, retained austenite, and a certain number of carbides. As the molybdenum content increases, the quantity of retained austenite and carbides increases, the acicular ferrite becomes finer, and the wear resistance and corrosion resistance increased. When the concentration of molybdenum reaches 0.570 wt%, the average wear weight loss decreased to 0.218 mg/m, the corrosion potential reached to -0.5626 V, and the corrosion current density decreased to 6.361 9 10 -8 A/cm 2 .

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Section: Introductionmentioning

confidence: 99%

“…The desired properties not only include good wear resistance but also excellent corrosion resistance [7][8][9][10]. Molybdenum has been considered as an effective alloying element to improve mechanical properties of ultrahigh carbon steel by solution strengthening, refining grain size, and forming carbides [11].…”

Section: Introductionmentioning

confidence: 99%

Effects of Molybdenum on the Wear Resistance and Corrosion Resistance of Carbidic Austempered Ductile Iron

Han

Wang

Sun

et al. 2015

Metallogr. Microstruct. Anal.

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“…En primer lugar, la utilización de tratamientos superficiales de protección temporal, tratamientos que deben ser tanto fáciles de aplicar como de eliminar (para facilitar operaciones posteriores como, por ejemplo, pintado). El otro método, más complejo pero en el que se está investigando de manera intensa, es el de la modificación de la composición química del material (Zhou et al, 2007;Camba et al, 2010;Sun et al, 2012), de manera que la relación entre silicio y carbono permita conseguir una mejora en la resistencia frente a la corrosión de estas fundiciones con una ductilidad y resistencia mecánica compatibles con su procesado.…”

Section: Introductionunclassified

Comportamiento frente a la corrosión de fundiciones con grafito laminar y esferoidal parcialmente modificadas con silicio en NaCl 0,03 M

Arenas¹,

Niklas²,

Conde³

et al. 2014

REVMETAL

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RESUMEN:El uso creciente de fundiciones esferoidales en aplicaciones tecnológicas hace que se busquen nuevos métodos para mejorar su comportamiento frente a la corrosión. Entre las distintas maneras de abordar este problema, la modificación de su composición química tiene un doble interés dado que, junto con un aumento en la resistencia frente a la corrosión, se pueden conseguir propiedades mecánicas mejoradas. Todo ello se debe conseguir, además, sin aumentar de manera significativa los costes de producción. En este trabajo se presentan los primeros resultados del comportamiento frente a la corrosión de una serie de fundiciones grafí-ticas de composición modificada. En el caso de las fundiciones esferoidales se ha variado el contenido de silicio con el fin de conocer el efecto de este elemento. Los resultados encontrados muestran una ligera mejora en la resistencia frente a la corrosión en aquellas aleaciones con alto contenido de silicio respecto a las fundiciones convencionales durante las primeras horas de ensayo para, posteriormente, mostrar un comportamiento similar. No obstante, es importante destacar que estas modificaciones no comprometen las propiedades mecánicas de las aleaciones base, lo que señala un camino para la preparación de nuevas fundiciones con un mayor contenido en elementos de aleación. ABSTRACT: Corrosion behaviour of ductile cast irons partially modified with silicon in 0.03 M NaCl. The increasing demand of ductile cast irons with extensive technological applications leads to enlarge the corrosion resistance of this group of metallic materials. In this sense, the use of different chemical compositions on such cast irons becomes one of the most interesting aspects among the different ways to improve their behaviour against corrosion due to the extra opportunity for increasing the mechanical properties. Additionally such improvements have to be made without any increase of processing costs to keep the interesting competitiveness of developed cast irons. In the present work the preliminary results obtained from corrosion tests made on a group of cast irons with different chemical compositions are presented. Among ductile cast irons, silicon content has been varied in order to investigate the effect of this element on corrosion resistance of the alloys. The obtained results show a slight improvement of this property for the alloys with high silicon content with respect to the conventional ones though such effect was found in the first time period of the corrosion tests. Interestingly this

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“…It has some advantages such as high performance–price ratio, good wear resistance, excellent fatigue strength, high elastic limit, and high yield limit, which attracted extensive attention of researchers . Researchers study different parameters of heat treatment trying to improve the mechanical properties of CADI . Dakre et al studied the effect of austenitization temperature on CADI and found the fine carbides were dispersively distributed in matrix when the austenitizing temperature was 1173 K. In addition, the hardness of samples austenitized at 1173 K was slightly more than austenitized at 1248 K. The high wear resistance and corrosion resistance were obtained for Mo‐bearing ductile iron austenitized at 1173 K for 5400 s…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic and Kinetic Analysis of Austenite Homogenization on Carbidic Ductile Iron

Yang

Lin

et al. 2019

steel research int.

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The austenite homogenization of carbidic austempered ductile iron is studied from both thermodynamics and dynamics by calculation and experimentation, and a mathematical model of carbide dissolution is established to predict the dissolved quantity of carbides. The results indicate that the mass fraction of carbon in austenite (austenite–graphite stable equilibrium) calculated by the Thermo‐Calc software is similar to the results quantitatively analyzed by electron probe. Based on Fick's second law, the elemental diffusion kinetics is analyzed by MATLAB software. Because the diffusion rate of chromium in austenite is lower than carbon, the carbon content is significantly decreased around undissolved carbides, but the chromium content is still high. Two equations of undissolved carbides' area are obtained by linear fitting.

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An investigation of the erosion–corrosion characteristics of ductile cast iron

Cited by 37 publications

References 6 publications

Effects of Molybdenum on the Wear Resistance and Corrosion Resistance of Carbidic Austempered Ductile Iron

Effects of Molybdenum on the Wear Resistance and Corrosion Resistance of Carbidic Austempered Ductile Iron

Comportamiento frente a la corrosión de fundiciones con grafito laminar y esferoidal parcialmente modificadas con silicio en NaCl 0,03 M

Thermodynamic and Kinetic Analysis of Austenite Homogenization on Carbidic Ductile Iron

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