Phosphorus segregation in CrMoV low-alloy steels

被引：17

作者：

Perhácová, J

Vyrostková, A

Sevc, P

Janovec, J

Grabke, HJ

机构：

[1] Safarik Univ, Dept Expt Phys, Kosice 04154, Slovakia

[2] Slovak Acad Sci, Inst Mat Res, Kosice 04353, Slovakia

[3] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany

来源：

SURFACE SCIENCE | 2000年 / 454卷 / 01期

关键词：

Auger electron spectroscopy; carbides; electron microscopy; phosphorus;

D O I：

10.1016/S0039-6028(00)00209-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The phosphorus segregation at temperatures of 773 and 853 K has been studied in two low-alloy Cr-0.4 Mo-0.5 V steels with different chromium contents (0.85 and 2.5 mass%). Segregation of elements on grain boundaries was measured by means of Auger electron spectroscopy. Transmission electron microscopy techniques were used for the identification of secondary phases in the steels investigated. A significant influence of aging temperature on the kinetics and equilibrium value of phosphorus grain-boundary concentration was observed. Both lower temperature and higher bulk chromium content were found to increase the grain-boundary phosphorus segregation. This is in agreement with the Langmuir-McLean theory, the model of phosphorus-carbon site competition, and also confirms the significant effect of carbide formation on phosphorus segregation in steels. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：642 / 646

页数：5

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