A514 grade B high strength steel plate controlled rolling is that, on the basis of adjusting the chemical composition of A514 grade B high strength steel plate, by controlling the heating temperature, rolling temperature, deformation system and other process parameters, the change law of austenite structure and the microstructure of phase transformation products are controlled, so as to achieve the purpose of refining the structure and improving the strength and toughness of A514 grade B high strength steel plate.
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Q345qC steel plate is the steel plate of bridge structure, the implementation standard is GB / T 714-2015 standard. A514 grade B high strength steel plate, Q345qC-Z25 steel: Q represents the yield strength, 345 represents the small yield strength, the unit is MPa, q is short for the bridge, C quality grade, corresponding to the corresponding impact temperature and impact work value, Z is the Z-direction performance that is the performance of the steel plate thickness direction, Z25 is the Z-direction Performance level requirements.
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