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Effects of Special Heat Treatments and Alloying Elements on the Microstructures and Mechanical Charateristics of ADI  

Kim, Sug-Won (Division of Advanced Materials Engineering, Chonbuk National University, Research Center of Advanced Materials Development(RCAMD))
Han, Sang-Won (Division of Advanced Materials Engineering, Chonbuk National University, Research Center of Advanced Materials Development(RCAMD))
Lee, Ui-Jong (Division of Advanced Materials Engineering, Chonbuk National University, Research Center of Advanced Materials Development(RCAMD))
Park, Jin-Sung (Division of Advanced Materials Engineering, Chonbuk National University, Research Center of Advanced Materials Development(RCAMD))
Woo, Kee-Do (Division of Advanced Materials Engineering, Chonbuk National University, Research Center of Advanced Materials Development(RCAMD))
Lim, Dong-Keun (Division of Advanced Materials Engineering, Chonbuk National University, Research Center of Advanced Materials Development(RCAMD))
Publication Information
Journal of Korea Foundry Society / v.22, no.2, 2002 , pp. 69-74 More about this Journal
Abstract
The effects of heat treatments and alloying elements on the microstructure and mechanical charaterisitics of specially austempered ADIs containing alloying elements such as Cu, Mo and Ni were investigated. To compare with the effect of conventional and normal(CN) austempering treatment, two kinds of special austempering treatments which are those with pre-quenching and pre-heating were conducted. The hardness and uniaxial fatigue tests were carried out to evaluate the mechanical charateristics. The hardness of ADI treated by CN heat cycles was higher than those of other ADIs. Cu added ADI (Cu-ADI) tempered at 400 after austenitizing exhibited the highest fatigue life cycles. While austempering after prequenching makes the austenite with high carbon stable, which resulted in transformation to highly strengthened bainites from the carbon enriched austenite phases during tempering. The high carbon enriched banites is considered to improve the fatigue strength.
Keywords
Heat treament cycle; Prequenching austempering; Fatigue test; Preheating austempering; Fatigue life cycles; Fatigue strength;
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  • Reference
1 Fatigue Pro-perties of Austempered Spheroidal Graphite Cast Irons /
[ K. Nagai;K. Kishitake ] / Imono 61
2 Influence of prequenching of Austempered Spheroidal Graphite Cast Iron on Its Microstructure, Mechanical Properties and Machinability /
[ T. Yoshida;K. Komatsu;S. Okada ] / Imono 65
3 Effect of Cu, Mo, Si on the Content of Retained Austenite of Austempered Ductiled Iron /
[ Yan Mi ] / Scripta metallurgica et materialia 32
4 Produc-tion of Ductile Cast Iron by Mg-Converter /
[ K. H. Lee ] / J. Kor. Foundrymen's Soc.
5 Propagation of Thermal Fatigue Cracks of Ferritic spheroidal and Compacted-Vermicualr Graphite Cast Irons /
[ Osamu Yamagisawa;Truman shen lui ] / Imono 54
6 Influence of microstructure on the Fatigue Properties of Austempered Ductile Irons /
[ C. K. Lin;T. P. Hung ] / Int. J. Fatigue 18
7 Development and control Technology of Austempered Ductile Irons with High Strength and High Toughness for Automotive Cam Shaft /
[ J. Y. Kim;D. M. Kang;S. U. Ahn;K. B. Kim;I. C. Kang ] / J. Kor. Foundrymen's Soc.
8 /
[ J. N. Rouns;K. B. Rundman ] / AFS Trans.
9 The Study on High Si and Mo DCI woth Hogh Temperature Oxidation Resistance property /
[ S. W. Kim;K. D. Woo;S. W. Han;J. K. Kim;D. Y. Kim ] / J. Kor. Foundrymen's Soc.   과학기술학회마을
10 Streg-therning Method of Ductile Cast Iron /
[ S. W. Kim ] / J. Kor. Foundrymen's Soc.