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| STRENGTH CALCULATION AND ITS PREDICTION OF NON QUENCHED-TEMPERED STEEL DURING CONTINUOUS CASTING-ROLLING |
| LIU Zhilin; LIU Weidong; LIN Cheng |
| Department of Materials and Chemical Engineering; Liaoning Institute of Technology; Jinzhou 121001 |
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Cite this article:
LIU Zhilin; LIU Weidong; LIN Cheng. STRENGTH CALCULATION AND ITS PREDICTION OF NON QUENCHED-TEMPERED STEEL DURING CONTINUOUS CASTING-ROLLING. Acta Metall Sin, 2004, 40(12): 1248-1252 .
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Abstract The strength of non quenched-tempered steel consists of the strength
of fine-grained α-Fe matrix, solution-strengthening,
interface-strengthening, dispersion-strengthening (carbides from
austenite), and
separation-strengthening (carbides from oversaturated ferrite).
Based on the strength of α-Fe
matrix, the strengthening increments of the above four mechanisms
are respectively calculated with the electron number
nA on the strongest bond in alloying phase and electron
density difference Δρ on biphase interface. A set of
strength calculated equations is proposed with the strengthening factors
and the weights of C and alloying elements (M) in non
quenched-tempered steel, and used in calculation of the end-rolled
strength of non quenched-tempered on
the basis of composition and the grain size after rolling.
In opposition, the optimization between composition and
the grain size can be accomplished on the strength proposed
by technical standard. So, the end-colled strength prediction
from composition, and grain size can be carried out.
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Received: 17 November 2003
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