点击次数：

论文类型：期刊论文

发表时间：2008-08-20

发表刊物：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

收录刊物：SCIE、EI、Scopus

卷号：489

期号：1-2

页面范围：62-64

ISSN号：0921-5093

关键字：carbon steel; hardness; electric field; quenching

摘要：It is found that application of an electric field during the quenching of 0.46% carbon steel in water increases its hardness. The hardness of the quenched surface increases with the strength of the electric field. The effect of the electric field on the hardness of the quenched surface is larger than that in the interior of the material. The quenching with an electric field gives a tinier martensite microstructure than the quenching without it. The possible mechanisms of electric field increasing the quenched hardness are: (a) the field reduces the critical radius of the martensite and the nucleation energy, and increases the nucleation rate; (b) the field reduces the vacancy concentration at the charged surface, thereby retarding the vacancy influence on the rate of pearlite formation. (C) 2007 Elsevier B.V. All rights reserved.