A production method of A36 steel plate for AP1000 nuclear power project
A production method, A36 technology, applied in the field of steel rolling, can solve the problem of high performance requirements of A36 steel plate
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Embodiment 1
[0023] Applying the method described in the present invention to produce A36 finished steel plates with specifications of 12000mm×2000mm×36mm, the chemical composition weight percentages of the A36 steel plates are: C 0.168%, Si 0.27%, Mn 0.94%, P 0.021%, S0.012% , Als 0.032%, the rest is Fe and unavoidable impurities; the production process of A36 steel plate is slab heating - descaling - rolling - slow cooling - normalizing; where:
[0024] 1) Rolling process: start rolling temperature 1150°C, finish rolling temperature 1000°C;
[0025] 2) Normalizing process: temperature 880~920℃, holding time 2min / mm.
[0026] The performance indicators of the A36 finished steel plate are as follows: when stretched at room temperature, the yield strength Rp0.2 is 356MPa, the tensile strength Rm is 510MPa, and the elongation is A 50mm is 27%, and the Z-direction tensile properties Z% are 71, 69, and 73.
Embodiment 2
[0028] Applying the method described in the present invention to produce A36 finished steel plates with specifications of 12000mm×2000mm×50mm, the chemical composition weight percentages of the A36 steel plates are: C 0.203%, Si 0.32%, Mn 1.08%, P 0.020%, S0.015% , Als 0.037%, the rest is Fe and unavoidable impurities; the production process of A36 steel plate is slab heating - descaling - rolling - slow cooling - normalizing; where:
[0029] 1) Rolling process: start rolling temperature 1200°C, finish rolling temperature 1000°C;
[0030] 2) Normalizing process: temperature 880~920℃, holding time 2min / mm.
[0031] The performance indicators of the A36 finished steel plate are as follows: when stretched at room temperature, the yield strength Rp0.2 is 345MPa, the tensile strength Rm is 523MPa, and the elongation is A 50mm is 22%, and the Z-direction tensile properties Z% are 67, 69, and 72.
Embodiment 3
[0033] Applying the method of the present invention to produce A36 finished steel plates with specifications of 12000mm×2000mm×100mm, the chemical composition weight percentages of the A36 steel plates are: C 0.169%, Si 0.26%, Mn 0.92%, P 0.018%, S0.017% , Als 0.024%, the rest is Fe and unavoidable impurities; the production process of A36 steel plate is slab heating - descaling - rolling - slow cooling - normalizing; where:
[0034] 1) Rolling process: start rolling temperature 1200°C, finish rolling temperature 1000°C;
[0035] 2) Normalizing process: temperature 880~920℃, holding time 2min / mm.
[0036] The performance indicators of the A36 finished steel plate are as follows: when stretched at room temperature, the yield strength Rp0.2 is 339MPa, the tensile strength Rm is 524MPa, and the elongation is A 50mm is 23%, and the Z-direction tensile property Z% is 64, 59, 63.
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Abstract
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