Mechanical and wear behavior of alloyed gray cast iron in the quenched and tempered and austempered conditions

Balachandran, G.; Vadiraj, Aravind; Kamaraj, M.; Kazuya, Ekusa

doi:10.1016/j.matdes.2011.03.054

Cited by 43 publications

(16 citation statements)

References 16 publications

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“…There are contradictory opinions in the reported literature -some authors [22][23][24][25] suggested that increase in hardness increases abrasive wear resistance, while few others reported 26,27) a decrease in abrasive wear resistance with the increase in hardness, in particular, where abrasive wear by brittle fractures predominates. Relatively less data is published regarding the abrasive wear behaviour of En31 steel.…”

Section: )mentioning

confidence: 99%

Abrasive Wear Behaviour of Heat Treated En31 Steel

et al. 2013

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Ni-Cr-Mo steels are widely used in machine part members, gears and shafts. Steels with higher carbon content (~1%) are used for heavy machine parts and bearings. Abrasive wear resistance is often a very important requirement for these high carbon steels, apart from sliding wear properties. In the present study, En31 steel was subjected to varying heat treatments to generate different microstructures. An attempt has been made to correlate the two body abrasive wear resistance with the bulk hardness and microstructures. The microstructures were studied through a combination of scanning electron microscopy (SEM), energy dispersive spectrometer attached to SEM (i.e. SEM-EDS) and X-ray diffraction (XRD). The bulk hardness decreased with increase in tempering temperature from 423 K to 848 K. The precipitation of Cr7C3 after 598 K tempering did not cause an appreciable increase in the hardness. At higher tempering temperatures (848 K), the martensite decomposed to give ferrite and cementite. The abrasive wear tests were carried out on hardened and tempered specimens. The abrasive wear mass loss increased with increase in the tempering temperature. Hardness had a direct correlation with the two body abrasive wear behaviour in En31 steel -increase in hardness increased the abrasive wear resistance. The important material removal mechanism were micro cutting and micro ploughing, the relative contribution of each to total wear loss was influenced by abrasive wear test conditions.

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Section: )mentioning

confidence: 99%

Abrasive Wear Behaviour of Heat Treated En31 Steel

et al. 2013

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“…Cardoso et al [14] aimed to evaluate the mechanical properties and the abrasive wear resistance of a group of nodular cast irons and a white cast iron, while Zhang et al [15] recently investigated ADI with three strength grades matched with high-carbon-chromium bearing steel, and the rolling-sliding wear tests under high contact load were conducted on an Amsler-type tribotester. And in other aspects, the influence of sliding speed, [16] austempering temperature, [17][18][19] microstructure, [20,21] graphite shape [22,23] , and alloying element [24][25][26][27] has been investigated in detail on the wear behavior of ADI. Therefore, the wear behavior of alloyed ductile iron with various austempering temperatures and the effect of the resultant microstructures on the wear behaviors for heavy section wear-resistant alloyed ductile iron should be further investigated.…”

Section: Junjun Cui and Liqing Chenmentioning

confidence: 99%

Microstructures and Mechanical Properties of a Wear-Resistant Alloyed Ductile Iron Austempered at Various Temperatures

Cui

Chen

2015

Metall Mater Trans A

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To further improve the mechanical performance of a new type of alloyed bainitic wear-resistant ductile iron, the effects of the various austempering temperatures have been investigated on microstructure and mechanical behaviors of alloyed ductile iron Fe-3.50C-1.95Si-3.58Ni-0.71Cu-0.92Mo-0.65Cr-0.36Mn (in weight percent). This alloyed ductile iron were firstly austenitized at 1123 K (850°C) for 1 hour and then austempered in a salt bath at 548 K, 573 K, and 598 K (275°C, 300°C, and 325°C) for 2 hours according to time-temperature-transformation diagram calculated by JMatPro software. The microstructures of austempered wearresistant ductile irons consist of matrix of dark needle-like ferrite plus bright etching austenite and some amount of martensite and some dispersed graphite nodules. With increasing the austempering temperature, the amount of ferrite decreases in austempered ductile iron, while the amount of austenite and carbon content of austenite increases. There is a gradual decrease in hardness and increase in compressive strength with increasing austempering temperature. The increased austenite content and coarsened austenite and ferrite can lead to a hardness decrease as austempering temperature is increased. The increased compressive strength can be attributed to a decreased amount of martensitic transformation. The alloyed ductile iron behaves rather well wear resistance when the austempering is carried out at 598 K (325°C) for 2 hours. Under the condition of wear test by dry sand/rubber wheel, the wear mechanisms of austempered ductile irons are both micro-cutting and plastic deformation.

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“…Este tipo de cilindros que son destinados al desplazamiento de los pistones en el motor de un automóvil, deben ser fabricados con una aleación fuerte para poder soportar a lo largo de su vida útil un trabajo de alta temperatura con explosiones constantes de combustible (Telejko et al, 2009;Balachandran et al, 2011). El material utilizado consiste principalmente en una fundición gris, que se caracteriza por tener buenas propiedades mecáni-cas junto con una buena resistencia al desgaste (Yamazaki et al, 2006).…”

Section: Introductionunclassified

Caracterización y evaluación de la templabilidad de una fundición gris empleada en la fabricación de camisas de cilindro para motores diésel

et al. 2017

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RESUMEN:El aumento de las propiedades mecánicas (dureza superficial) de las camisas de cilindro es uno de los objetivos de las empresas de fundición especializadas, en miras de aumentar la competitividad de sus productos en el mercado local y extranjero. El objetivo de este estudio se centró en la caracterización de la fundición gris utilizada en la producción de las camisas y en la determinación de los parámetros metalúrgicos en el diseño del tratamiento térmico de temple convencional. Lo anterior, se realizó mediante la evaluación de la templabilidad del material por el método de Grossman y el ensayo Jominy, la selección de la temperatura de austenización y la severidad del medio de enfriamiento para un adecuado endurecimiento del material. Los resultados revelaron que el excelente valor de dureza obtenido luego del tratamiento es atribuido a la adecuada templabilidad de la fundición y a la severidad de temple seleccionada. ABSTRACT: Characterization and hardenability evaluation of gray cast iron used in the manufacture of diesel engine cylinder liners. The increment of the mechanical properties (surface hardness) of engine cylinder is one of the principal goals for foundry company, to increase the competitiveness of their products in the local and foreign market. This study focused on the characterization of the gray cast iron used in the production of engine cylinder liners and metallurgical parameters determination in the design of conventional quenching heat treatment. The characterization was performed by material hardenability evaluation using Grossmann method, and Jominy test; the austenitizing temperature and the severity of cooling medium to a proper hardening of material were selected. Results revealed that the excellent hardness value obtained is attributed to the suitable hardenability of the gray cast iron and adequate severity selection for hardening treatment.

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Mechanical and wear behavior of alloyed gray cast iron in the quenched and tempered and austempered conditions

Cited by 43 publications

References 16 publications

Abrasive Wear Behaviour of Heat Treated En31 Steel

Abrasive Wear Behaviour of Heat Treated En31 Steel

Microstructures and Mechanical Properties of a Wear-Resistant Alloyed Ductile Iron Austempered at Various Temperatures

Caracterización y evaluación de la templabilidad de una fundición gris empleada en la fabricación de camisas de cilindro para motores diésel

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