Research on forge-quenching process of nodular cast iron

Authors: Qi, K.; Li, T. J.; Bai, F. D.; Yan, Z. M.; Wang, Z. X.; Sun, M. Q.

Source: Materials Research Innovations, Volume 14, Number 4, September 2010 , pp. 316-319(4)

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Abstract:

A new quenching process for nodular cast iron named forge-quenching heat treatment is developed. Nodular cast iron underwent hot forging immediately followed by quenching at 790°C in water. Compared with conventional quenched nodular cast iron, microstructure analysis shows the existence of finer acicular martensitic structure and prolate ellipsoids graphite particles in forge-quenched nodular cast iron. The hardness and impact test results show that the forge-quenched nodular cast iron presents superior mechanical properties to conventional quenched nodular cast iron. The wear rate and the friction coefficient are 2 times lower than quenched white cast iron which is used as grinding balls.

Keywords: PHASE TRANSITIONS; QUENCHING; MECHANICAL PROPERTIES; NODULAR CAST IRON; MICROSTRUCTURE

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/143307510X12777574295181

Affiliations: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, China

Publication date: 2010-09-01

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