Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2010-09-01

Journal: MATERIALS RESEARCH INNOVATIONS

Included Journals: Scopus、EI、SCIE

Volume: 14

Issue: 4

Page Number: 316-319

ISSN: 1432-8917

Key Words: Nodular cast iron; Phase transitions; Mechanical properties; Microstructure; Quenching

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 degrees 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.