Paper Title:
Advances in the Development of Carbidic ADI
  Abstract

Carbidic ADI (CADI) is a new type of Austempered Ductile Iron containing free carbides in the microstructure, providing a particular combination of wear resistance and impact toughness. In this work, four CADI variants were evaluated, in which carbides were promoted by alloying with chromium. Tests performed under the low stress abrasion condition imposed by the ASTM G65 standard show that CADI can increase the wear resistance up to 100 % when compared with conventional ADI austempered at the same temperature. The carbide content must be higher than 10 % to promote a considerable reinforcing effect. However, at this carbide content level, the impact toughness varies between 7 and 11 J/cm2 for unnotched samples. These values are much lower than those of conventional ADI, but higher than those of other abrasion resistant materials, like white irons. Some CADI variants were also evaluated in field tests, producing abrasion under either low stress or high stress conditions. For this purpose, two CADI prototype parts were studied: screw segments for animal food extruders (low stress abrasion) and wheel loader bucket edges (high stress abrasion). The results gathered showed that CADI behaves satisfactorily under low stress abrasion, but the performance is not so good under high stress conditions. To analyze the differences in the abrasion response, scratch tests were performed in order to evaluate the interaction between the abrasive tip and the microstructure.

  Info
Periodical
Edited by
Adel Nofal and Mohamed Waly
Pages
187-192
DOI
10.4028/www.scientific.net/KEM.457.187
Citation
L. Sebastián, J. A. Sikora, R. C. Dommarco, "Advances in the Development of Carbidic ADI", Key Engineering Materials, Vol. 457, pp. 187-192, 2011
Online since
December 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jing Pei Xie, Ai Qin Wang, Wen Yan Wang, Ji Wen Li, Luo Li Li
Abstract:The erosion wear experiments of low-chromium cast iron containing nickel were done by MCF-30 Erosion Abrasion Experimental Machine. The...
2984
Authors: Anil Meena, Mohamed El Mansori
Chapter 13: Machining and Cutting
Abstract:Near-net shape austempered ductile iron (ADI) castings can be considered as a significant economic advantage to the increasing industrial...
1271