Title of article
Effect of microcontent Nb in solution on the strength of low carbon steels
Author/Authors
Yu، نويسنده , , Qingbo and Wang، نويسنده , , Zhaodong and Liu، نويسنده , , Xianghua and Wang، نويسنده , , Guodong، نويسنده ,
Pages
7
From page
384
To page
390
Abstract
Two low carbon steels were hot rolled by thermo-mechanical process (TMCP), and one contains niobium (0.013%), and another does not contain niobium. By the comparison of tested results, it can be found that the yield strength of Nb steel is 55 MPa higher than that of Nb free steel on an average. In addition, the ferrite grain of Nb steel is finer than that of Nb free steel under the same finishing temperature, cooling rate, and final temperature. However, there are no Nb(C,N) particles to precipitate from austenite and ferrite by the observation of transmission electron microscopy (TEM). It can be concluded by theoretical analysis that both the increase of strength and the refinement of ferrite grain of Nb steel result from solid solution Nb atoms.
Keywords
Ferrite grain , Solution Nb , nucleation rate , Recrystallization
Journal title
Astroparticle Physics
Record number
2065480
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