Advances in the Development of Carbidic ADI

Laino, Sebastián; Sikora, Jorge Antonio; Dommarco, Ricardo

doi:10.4028/www.scientific.net/kem.457.187

Cited by 4 publications

(1 citation statement)

References 13 publications

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“…A new type of ADI which contains carbides immersed in the typical matrix of ductile iron called carbidic austempered ductile iron (CADI) has been developed in recent years. CADI is produced by austempering heat treatment of ductile iron which has a controlled amount of carbides present in the microstructure for a higher abrasion resistance than that of the base material [18][19][20]. The standard practice in carbide introduction is chill-cast of ductile iron parts.…”

Section: Introductionmentioning

confidence: 99%

The influence of chill thickness and austempering temperature on dry sliding wear behaviour of a Cu-Ni carbidic austempered ductile iron (CADI)

Chiniforush¹,

Yazdani²,

Nad³

2018

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The influence of chill thickness and applied load were studied on wear behaviour of a carbidic austempered ductile iron containing Cu and Ni. Ductile iron with chemical composition Fe-3.6C-2.6Si-0.53Cu-0.51Ni (in wt.%) was cast into standard moulds with copper end chills of different thicknesses. Wear test samples were prepared from the chilled surface of the blocks. Austenitizing heat treatment was carried out at 870 • C followed by austempering at 270, 320, 370 and 410 • C in electrically heated salt bath furnaces for optimum times. A block-on-ring testing machine was used to carry outwear tests in dry sliding condition under applied loads of 100 and 150 N. Scanning electron microscopy was used to examine the worn surface of the samples. The results indicated an improvement in wear resistance of austempered ductile iron by introducing carbides into the matrix compared to that of non-carbidic samples. Best wear performance in carbidic austempered ductile iron was achieved for a matrix containing about 30 vol.% carbides. K e y w o r d s : carbidic austempered ductile iron, sliding wear, chill thickness, block-on-ring

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Section: Introductionmentioning

confidence: 99%

The influence of chill thickness and austempering temperature on dry sliding wear behaviour of a Cu-Ni carbidic austempered ductile iron (CADI)

Chiniforush¹,

Yazdani²,

Nad³

2018

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Highsilicone Austempered Ductile Iron

Kochański¹,

Krzyńska²,

Radziszewski³

2014

Archives of Foundry Engineering

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Ductile iron casts with a higher silicone content were produced. The austempering process of high silicone ductile iron involving different austempering times was studied and the results presented. The results of metallographical observations and tensile strength tests were offered. The obtained results point to the fact that the silicone content which is considered as acceptable in the literature may in fact be exceeded. The issue is viewed as requiring further research

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Effect of austenitizing temperature on the microstructure evolution and properties of Cu-bearing CADI

Nan¹,

Fu²,

Yang³

et al. 2019

Materials Testing

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In the present study, the authors investigated the effect of the austenitizing temperature (860 to 1020 °C) on the microstructure evolution, hardness, wear resistance and corrosion resistance of Cu-bearing carbidic austempered ductile iron (CADI) by means of an optical microscope (OM), a scanning electron microscope (SEM), a Rockwell hardness tester, a microhardness tester, an X-ray diffractometer (XRD), a block-on-ring wear testing machine and electrochemical tester. The results show that with an increase in the austenitizing temperature, the amount of acicular ferrite decreases, size expands, and the volume fraction of high-carbon austenite increases gradually as does carbon content. Part of the carbide dissolves into the matrix, and the amount is significantly reduced. The hardness of Cu-bearing CADI first increases and subsequently decreases, and the hardness is highest at 940 °C. With an increase in austenitizing temperature, the wear loss of Cu-bearing decreases and its wear resistance increases. When the austenitizing temperature is 940 °C, wear loss is lowest and wear resistance is optimal. Electrochemical corrosion experiments show that as the austenitizing temperature increases, the corrosion potential of Cu-bearing CADI is slightly improved, the corrosion current density is gradually reduced, and the corrosion resistance of Cu-bearing CADI is improved. Considered comprehensively, the austenitizing temperature of Cu-bearing CADI should be determined to be 940 °C.

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Advances in the Development of Carbidic ADI

Cited by 4 publications

References 13 publications

The influence of chill thickness and austempering temperature on dry sliding wear behaviour of a Cu-Ni carbidic austempered ductile iron (CADI)

The influence of chill thickness and austempering temperature on dry sliding wear behaviour of a Cu-Ni carbidic austempered ductile iron (CADI)

Highsilicone Austempered Ductile Iron

Effect of austenitizing temperature on the microstructure evolution and properties of Cu-bearing CADI

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