Abstract
The effect of strain ageing parameters on the impact strength of low-carbon microalloyed C–Mn–Si–Nb–V–Ni–Cu-steel on the example of rolled product 150 mm thick after normalizing and additional heat treatment is demonstrated. The change in steel critical impact strength with the degree of prior cold deformation and with additional heating to 250°C is studied. Tendency towards strain ageing at 1/8 and 1/4 of sheet steel thickness after heat treatment is studied.
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