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Characteristics of tempering response of austempered ductile iron

Authors :
Xu Ran
Gary C. Barber
Chuanlin Tao
Bingxu Wang
Xichen Sun
Source :
Journal of Materials Research and Technology, Vol 7, Iss 2, Pp 198-202 (2018)
Publication Year :
2018
Publisher :
Elsevier, 2018.

Abstract

Austempered ductile iron (ADI) is produced by an isothermal heat treatment. Tempering is an effective method to increase the toughness and decrease the hardness of ADI. In the present research, the transformation of ADI was investigated after applying various tempering temperatures. The hardness of ADI samples with and without tempering was measured and the microstructure of ADI samples was analyzed by using metallographic optical microscopy. It was found that the ausferrite decomposed into dispersive cementite particles above a tempering temperature of 538 °C. Thus, the tempering process for ADI must be carefully selected so that the excellent properties of ADI are not degraded. Keywords: ADI, Tempering process, Hardness measurement, Phase transformation, Microstructure

Details

Language :
English
ISSN :
22387854
Volume :
7
Issue :
2
Database :
OpenAIRE
Journal :
Journal of Materials Research and Technology
Accession number :
edsair.doi.dedup.....bc52bbd1459f6957c7c3cf5686a3b406