Abstract

The effect of alloying system and production parameters for hot-rolled product and annealing on the mechanical properties of microalloyed steel cold-rolled product are studied. The possibility is demonstrated of a marked effect of the amount and size of MnS particles and nano-precipitates of microalloying element carbonitrides on strengthening by grain refinement and dispersion strengthening. Recommendations are developed for assimilating industrial production of high-strength cold-rolled material with a yield strength of 320–340 MPa.

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