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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 12    No. 1    February 2002

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Formation and growth model of
B-Al permeation layer of Steel 45
JI Ze-sheng(吉泽升)1,2,LI Qing-fen(李庆芬)2,LI Dong-hua(李冬华)3

1.School of Materials Science and Engineering,
Harbin University of Science and Technology,Harbin 150040,China;
2.School of Mechanical & Electrical Engineering,
Harbin Engineering University,Harbin 150001,China;
3.School of Application Science,
Harbin University of Science and Technology,Harbin 150080,China

Abstract:The B-Al permeation layers of Steel 45 were studied by means of SEM, TEM and XRD.The formation and growth model of permeation layer was proposed.The layer formation,growth and the migration behaviors of B were discussed.It is suggested that the diffusion of Al is deferred when the surface was covered by borides and aluminize compounds are surrounded by borides with the further growing of borides.

 

Key words: Steel 45;B-Al permeation;formation and growth model

ISSN 1672-7029
CN 43-1423/U

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