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论文类型：期刊论文

发表时间：2010-09-01

发表刊物：MATERIALS RESEARCH INNOVATIONS

收录刊物：SCIE、EI、Scopus

卷号：14

期号：4

页面范围：316-319

ISSN号：1432-8917

关键字：Nodular cast iron; Phase transitions; Mechanical properties; Microstructure; Quenching

摘要：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.