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The influence of alloying and microalloying elements on the mechanical properties of pipe-steel sheet (strength category K60) depends on the temperature in low-temperature controlled rolling, on account of the polymorphous γ → α and eutectoid transformation of austenite in the mill’s finishing stand.
The structure and properties of thick rolled sheet made from high-strength structural steel of various compositions after controlled rolling are studied. With decrease in the final rolling temperature, the strength increases, as well as the structural banding. The formation of band structure in low-temperature controlled rolling is attributed to machining liquation at temperatures below the recrystallization...
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