BANDED MICROSTRUCTURE IN FORGED 18CrNiMo7-6 STEEL
DOI:
https://doi.org/10.7494/mafe.2009.35.1.45Keywords:
hot forging, toothed wheels, banded microstructure in ferritic-pearlitic steel, heat treatmentAbstract
18CrNiMo7-6 steel, after hot forging, exhibits a distinct banding of ferritic-pearlitic microstructure, probably related to the segregation of alloying elements during the ingot crystallization. The heat treatment allowing to obtain bainitic microstructure in this steel is described in the paper. The obtained bainitic microstructure exhibits only very small traces of banding.
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References
Dobrzański L.A.: Engineering materials and materials design, Fundamentals of materials science and physical metallurgy. WNT, Warsaw-Gliwice, 2006 (in Polish)
Bastien P.G.: The mechanism of formation of banded structures, Journal of Iron and Steel Institute, 187 (1957) 281-291
Jatczak C.F., Girardi D.J., Rowland E.S.: On banding in steel, Transactions of the ASM. 48 (1956) 279-305
Marcisz J., Garbarz B., Żak A.: Causes of banded microstructure formation in hot rolled ferrite-pearlite steel products, Metallurgy and Metallurgical Engineering News, 74 (2007) 12, 655-663 (in Polish)
Marcisz J., Żak A., Garbarz B.: Methods for improving of homogeneity and plasticity of continuously cast steel semiproducts and products hot rolled or forged with small degree of reduction ratio, Transactions of the Institute for Ferrous Metallurgy, (2007) 1, 51-53 (in Polish)
