What are the features of hot rolled sheet?
2022-08-17
From a metallographic point of view, the boundary between cold rolling and hot rolling should be distinguished by the recrystallization temperature. That is, rolling below the recrystallization temperature is cold rolling, and rolling above the recrystallization temperature is hot rolling. The recrystallization temperature of steel is 450-600℃. During hot rolling, the metal has high plasticity and low deformation resistance, which greatly reduces the energy consumption of metal deformation. Hot rolling can improve the processing performance of metals and alloys, that is, the coarse grains in the casting state are broken, the cracks are healed significantly, the casting defects are reduced or eliminated, the as-cast structure is transformed into a deformed structure, and the processing performance of the alloy is improved. Hot rolled steel is easy to roll and has high rolling efficiency. Hot Rolled Sheet has low hardness, easy processing and good ductility.Hot-rolled steel sheet, the mechanical properties are far inferior to cold working, and inferior to forging, but have better toughness and ductility
