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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2007

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Properties of a Nb-V-Ti microalloyed steel influenced by cold rolling and annealing

Janosec M., Schindler I., Palat J., Cizek L., Vodarek V., Mistecky E., Ruzicka M., Dobrzański L. A., Rusz S., Suchanek P.

Journal of Achievements in Materials and Manufacturing Engineering

2007

Vol. 20, nr 1-2

251-254

Purpose: was to investigate impact of cold forming and annealing on microstructural and mechanical properties of HSLA steel. Design/methodology/approach: Testing of Nb-V-Ti microalloyed strip steel was based on a combination of cold rolling, recrystallization annealing, mechanical testing, metallography and TEM. Findings: It was confirmed that by a suitable combination of size of previous cold reduction size and parameters of the following annealing it is possible to influence considerably a complex of mechanical properties of particular strips. Strength as well as plastic properties depended on the course of recrystallization and precipitates' coarsening during annealing. Research limitations/implications: The experiment should be supplemented by the more detailed analyses of microstructure. Practical implications: The results may be utilized for optimization of terms of heat treatment in a cold rolling mill, especially in accordance with specific requirements for a relation between plastic and strength properties of the investigated steel. Originality/value: Research possibilities of VSB-TUO in the sphere of cold rolling of Nb-V-Ti HSLA steel were introduced in combination with the complex approach to processing of the obtained results.